Abstract:Neurodegenerative diseases, such as Alzheimer"s disease, Parkinson"s disease, and Huntington"s disease, are primarily caused by the damage to brain neurons and commonly affect middle-aged and elderly individuals, posing a significant burden on aging societies. Studies has indicated that the pathologies of these diseases involve various mechanisms including neuroinflammation, mitochondrial dysfunction, and ferroptosis. Of these mechanisms, neuroinflammation is present before the onset of the disease and worsens as it progresses. Flavor compounds have shown potential in penetrating the blood-brain barrier due to their small size. Their unique multi-functional structure allows them to improve the brain microenvironment by inhibiting neuroinflammation and exerting a neuroprotective effect, which presents a new possibility for alleviating and treating neurodegenerative diseases. This paper provides an overview of neuroinflammation in neurodegenerative diseases, compares the different mechanisms of various flavor compounds in alleviating neuroinflammation and treating neurodegenerative diseases based on their chemical structures, and identifies the current research"s limitations and shortcomings while offering a new plan and direction for future treatment of neurodegenerative diseases and related studies.

Abstract:Biobased packaging materials, with their significant advantages of green environmental protection, low cost, and easy degradation, are increasingly becoming the focus of research and practice. Among them, protein thin films have always been a research hotspot in the field of materials science due to their excellent film-forming properties and complex formation mechanisms. In nature, plant derived antibacterial ingredients are abundant and diverse, possessing both natural and safe characteristics. This provides the possibility of combining plant active ingredients with protein matrices to develop composite films with antibacterial functions. The application of such composite films in food packaging can effectively maintain the sensory quality of food and extend its shelf life.This article systematically reviews and studies the latest developments in protein antibacterial films both domestically and internationally. It delves into the film-forming mechanisms and modification techniques of various protein films, and provides a detailed analysis of the types, characteristics, and antibacterial mechanisms of plant-based antibacterial components. Meanwhile, this article also reviews the practical application cases of protein active packaging in food categories such as fruits, vegetables, meat, and aquatic products, and summarizes and prospects its future applications in the field of food packaging. This study aims to provide a solid theoretical foundation and clear research direction for the development and application of protein active packaging films, in order to promote their sustainable development in the future food packaging field.

Abstract:Using isophorone diisocyanate (IPDI), polypropylene glycol-1000 (PPG-1000), dimethylolpropionic acid (DMPA), ethylenediamine (EDA), perfluorohexylethanol (TFO) and γ-aminopropyltriethoxysilane (KH-550) as raw materials, three kinds of waterborne polyurethane (WPU) sizing agents were prepared by self-emulsifying method. The chemical structure of sizing agent was characterized by FTIR and XPS, and the appropriate sizing concentration was determined to be 1.0% by surface tension, scanning electron microscope (SEM) and thermogravimetric test. Three sizing agents with a concentration of 1.0% were mechanically blended at different compound ratios, and the sized carbon fibers were tested by SEM and contact angle. It was found that the surface energy of carbon fibers was obviously improved after sizing. Finally, the interfacial shear strength (IFSS) test of polyurethane-based composite materials was carried out by micro-droplet method. The results showed that EDA modification effect was the best. The IFSS reached 34 MPa, which was 116% higher than that of the original carbon fiber. It provides guidance for the research and development of sizing agent matching polyurethane matrix.

Abstract:Gravure printing was employed to fabricate transparent electrodes based on poly(3,4-ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS), enabling the development of flexible, patterned light-emitting electrochemical cell (LEC). The process began with oxygen plasma treatment of polyethylene terephthalate (PET) to enhance surface wettability, followed by solvent doping to optimize the properties of the PEDOT:PSS ink. Transparent PEDOT:PSS electrodes were gravure printed on PET substrates and their performance was further enhanced by post-treatment with formic acid (HCOOH). It was found that oxygen plasma treatment significantly improved the wettability of the PET surface, whereas ethylene glycol (EG) doping enhanced the film-forming properties and conductivity of the PEDOT:PSS ink. The post-treatment with formic acid resulted in a PET-PEDOT:PSS electrode with high conductivity (sheet resistance of 380 Ω/sq) and high transmittance (88.06%). After 600 s of mechanical bending at various angles, the electrode retained stable electrical performance. Finally, using the PET-PEDOT:PSS electrode as the anode, a flexible bottom-emitting LEC was successfully fabricated under ambient conditions by a fully solution-processed method, achieving a brightness of 110.4 cd/m2. In Addition, a patterned LEC device was fabricated using the patterning capability of screen printing, which exhibited excellent luminescent performance at bending angles of 30°, 45°, and 60°.

Abstract:Due to unique three dimensional network structure of superfine fibers, bacterial cellulose (BC) has gained great attention in various areas such as heat insulation, adsorption, energy storage, bioactive scaffold and etc. Low mechanical strength and flammability are bottlenecks in the application of BC aerogel. Therefore, it is necessary to improve flame retardancy and mechanical strength of BC aerogel. In this paper, the BC/aramid nanofibers (ANF) composite aerogel was prepared with in situ grown BC and aramid nanofibers. The structures of BC aerogel and BC/ANF aerogel were characterized by Fourier transform infrared spectrometer, X-ray diffractometer and scanning electron microscope. The thermal properties, flame retardant properties and tensile fracture properties of aerogels were analyzed. The effects of ANF amount on the structure and properties of BC/ANF aerogels were investigated. The results show that compared with BC aerogel, the tensile strength is enhanced by 6.42 times, the elongation at break (19.61%) has increased by 6.00 times, the limiting oxygen index (LOI) of BC/ANF aerogel is increased to 22.38%, the specific surface area is enhanced by 1.42 times and the thermal conductivity is decreased to 0.0352 W/(m·K) at the mass fraction of ANF of 5.0%. The amide groups in ANF form hydrogen bonds with the hydroxyl groups in BC, enhancing the binding force between the two. ANF fills and entangles in the BC fiber network, generating van der Waals forces that cause them to attract and approach each other, thus enhancing the mechanical properties of the BC/ANF aerogel. The nanoscale combination of ANF and BC effectively inhibits the formation and decomposition of levoglucose, promotes carbonization, and significantly improves the thermal stability and flame retardant properties of the BC/ANF aerogel.

Abstract:Using D201 anion exchange resin and cellulose acetate (CA) as raw materials, the quaternized hygroscopic adsorbent film (QAM) was prepared by phase inversion method, and then the hydrophobicity was regulated by doping fluorine-containing polymer to prepare a fluorine-containing polymer quaternized hygroscopic adsorbent film (QAM-fluoropolymer) as a CO2 adsorbent. The QAM and QAM-fluorinated polymers were characterized by SEM, FTIR, BET and static water contact angle tester. The effects of doped fluorine-containing polymer types on the CO2 adsorption performance of QAM-fluorinated polymers were investigated by CO2 adsorption and kinetic experiments. Based on the hydrophobicity and drying performance test and model fitting, as well as CO2 adsorption and kinetic experiments, the effect of 4-fluorostyrene (4FS) doping amount on the performance of 4FS doped quaternized moisture swing adsorbents film was investigated, and the best performance adsorbent was subjected to relative humidity CO2 adsorption response test and recycling experiment. The results show that doping 4FS can significantly improve the pore structure and hydrophobicity of QAM adsorbent, and improve the CO2 adsorption performance. When 20% of CA mass is replaced by 4FS doping, the prepared QAM-20%4FS has the best performance. Under the condition of relative humidity of 22.5%~90%, the CO2 adsorption capacity is maintained at 1.03~1.245 mmol/g, and the half adsorption time (t1/2) is 4.15~7.3 min. Under the condition of relative humidity of 90.0%, the adsorption capacity and peak adsorption rate increased by 37.86% and 79.75% compared with QAM. After 8 cycles, the cycle capacity of QAM-20%4FS is still stable at 1.15~1.2 mmol/g, and the regeneration degree is more than 90%.

Abstract:The eutectic system of inorganic hydrated salts can effectively adjust the phase transition temperature and expand the application field of the system, but it is difficult to fundamentally solve the problem of phase separation of the system. The essence of phase separation lies in the low solubility of some inorganic salts, which become anhydrous salts after the removal of crystal water, which are difficult to dissolve effectively during the phase transition process, break away from the system and precipitate. In this study, 13% water was added to sodium sulfate decahydrate (SSD) and disodium hydrogen phosphate (SPDD) eutectic system to improve the solubility of solid inorganic salts during phase transformation. Using 3% Na₂SiO₃?9H₂O as nucleating agent, the supercooling degree of the system was reduced to 0.16 ℃. On this basis, using agarose-locust bean gum (AG-LBG) three-dimensional network structure as the supporting skeleton, the phase change system was loaded by impregnation method, and the form-stable phase change material (SSPCM) with the loading rate of 85% was prepared, which effectively solved the problem of liquid leakage in the solid-liquid phase change process. The phase transition temperature, enthalpy and thermal conductivity of SSPCM are 26.40 ℃, 147.20 J/g and 0.11 W/(m?K). The simulation test of thermal insulation effect in the same time shows that, compared with foam sandwich, the heating time of the core temperature inside the building is extended by 3.60 times, and the cooling time is extended by 2.37 times, which has excellent temperature control effect.

Abstract:PolyCOFs (polymer covalent organic frameworks) is a new porous covalent organic framework material with good crystallinity and mechanical properties. In this paper, a polymer building monomer (poly-2,5-polyethylene glycol methoxy terephthaloyl hydrazide) DTH-400 containing polyethylene glycol (PEG-400) segment structure was synthesized. PolyDTH-400x/CPAN (carboxylated polyacrylonitrile) composite membrane containing PEG-400 segment was prepared by interfacial polymerization of 2,5-diethoxyterephthaloyl hydrazide (DTH), DTH-400 and trialdehyde phloroglucinol (Tp).The effects of the addition ratio of DTH-400 to DTH on the pore size and separation performance of the membrane were investigated. The results show that the introduction of polymer chains effectively reduces the pore size of the separation layer of covalent organic framework material (COF), and the introduction of polymer chains improves the crystallization and mechanical properties of PolyDTH-400x COF membrane. The COF membrane has better mechanical and thermal stability. When the molar ratio of DTH-400 to DTH was 1:2, the prepared polymer membrane PolyDTH-4001/3/CPAN had the best performance. The rejection rate of Coomassie brilliant blue-R250 was greater than 99 %, and the pure water flux was 25.2 L/(m2·h·105pa).

Abstract:A series of polycarbonate (PC) / cellulose acetate (CA) blend ultrafiltration membranes (CPCM) were prepared by immersion precipitation phase inversion method using PC as the basic ultrafiltration membrane material and polyvinylpyrrolidone as the pore-forming agent. Polycarbonate ultrafiltration membrane( PCM )and CPCM were characterized by FTIR, WAC, SEM, porosity and average pore radius. The effects of preparation conditions on the performances of membranes were investigated. The results showed that CA was successfully blended with PC. With the increase of CA content, the finger-like pore channel layer of CPCM gradually became thicker, the cavity became larger, the pores in the dense layer became larger, and the connected pores between the pores increased. The average pore radius of PCM without CA was 23.33 nm, and the average pore radius of CPCM with 2 wt% CA was 42.53 nm, which was 82.3% over that of PCM without CA. The pure water flux of CPCM was much higher than that of PCM, up to 357.7 L?m-2?h-1. The BSA rejection was slightly lower than that of PCM membrane, but it was still above 95%. Based on the results of pure water flux, bovine serum albumin (BSA) rejection rate and flux recovery rate (FRR) of CPCM, the comprehensive performances were the best when the addition amount of CA was 1 wt %. The pure water flux Jw was 334.3 L?m-2?h-1, the BSA rejection rate R was 95.9 %, and the two rounds of FRR values were 84.8 % and 76.7 %, respectively. The addition of CA significantly improved the hydrophilicity of the PC membrane surface, thereby enhancing its ultrafiltration performance.

Abstract:In order to improve the hard water resistance of traditional surfactant washing, reduce the use of chelating agents in washing formulas. In this paper, amphoteric gemini surfactants (Ph-2UHSB, DiPh-2UHSB) with benzene and diphenylmethane as spacers were synthesized. The structure of the product was characterized using electrospray mass spectrometry (ESI-MS) and hydrogen nuclear magnetic resonance spectroscopy (1H NMR), and the surface properties, Krafft point, emulsification, decontamination and other properties of the product were comprehensively evaluated. The results show that the synthesized surfactant has a lower critical micelle concentration (CMC) of the order of 10-5 mol/L, lower foaming property, and good wettability. Its hard water resistance stability is better than that of sodium dodecyl benzene sulfonate (SDBS). At a hard water concentration of 500 mg/L, Ph-2UHSB #39;s removal rate of oil stains on fabrics is 18.34% higher than that of SDBS, and Ph-2UHSB is consistent with SDBS has a synergistic decontamination effect.

Abstract:The taurine-modified POSS-based giant surfactants (7Tau-POSS-Cn, n= 1, 4, 8, 12) were synthesized through the ring-opening reaction of the amino group of taurine with the epoxy group. Heptaepoxide monoalkyl POSS intermediate (7EP-POSS-Cn, n= 1, 4, 8, 12) were synthesized through the hydrolysis of silanes using 3-glycidoxypropyltriethoxysilane (GPTES), methyltriethoxysilane (MTEOS), isobutyltriethoxysilane (TBTEOS), octyltriethoxysilane (OCTEOS), and dodecyltriethoxysilane (DOTEOS). The structure of 7Tau-POSS-Cn ( n= 1, 4, 8, 12 ) were characterized by FT-IR, NMR, TEM, and DLS. The surface activity, wettability, interfacial activity, temperature resistance, and salt resistance of 7Tau-POSS-Cn ( n= 1, 4, 8, 12 ) were tested through surface tension tester, contact angle tester, and interfacial tension tester. The results indicate that when the alkyl chain length of 7Tau-POSS-Cn is 8, 7Tau-POSS-C8 exhibits the most excellent surface activity, interfacial activity and wettability. It is uniformly dispersed in the aqueous solution in the form of spherical micelles, with an average particle size of 135.5 nm and a polydispersity index of 0.405. The critical micelle concentration of the 7Tau-POSS-C8 solution is 0.04 mol/L, and the lowest surface tension is 29.0 mN/m. The 7Tau-POSS-C8 at a concentration of 0.01 mol/L can reduce the oil-water interfacial tension to 5.821 mN/m and decrease the water contact angle of the oil-wet polytetrafluoroethylene membrane to below 40°.

Abstract:Using 2-methylimidazole (2-MelM) and zinc nitrate as raw materials, zeolite imidazole-8 (ZIF-8) nanomaterials were prepared as chemotherapy drug carriers. The inner and outer layers were loaded with chemotherapy drugs ciprofloxacin (CIP) and paclitaxel (TAX), respectively. Finally, polydopamine (PDA) was coated to construct a nano drug delivery platform ZIF-8: CIP@ZIF-8 ∶ TAX@PDA (ZCZTP) nanoparticles. Characterization of ZCZTP was carried out using TEM, nano particle potential analyzer, XRD, etc. The biosafety and cytotoxicity of ZCZTP were evaluated by CCK-8 method. The uptake ability of 4T1 cells towards ZCZTP was evaluated by labeling with Rhodamine B (RhB) and confocal laser scanning microscopy (CLSM). The results indicate that ZCZTP has a uniform particle size (around 95 nm for a single layer) and a regular cubic morphology; EDS indicates that CIP and TAX are coated on the inner and outer layers of the carrier, respectively; The Zeta potential of ZCZTP is -13.23 ± 2.29 mV, and its drug loading capacity for CIP and TAX is 4.28% and 8.57%, respectively. The encapsulation efficiency is 42.8% and 85.7%, respectively. The cumulative drug release of CIP and TAX at 48 hours (pH=6.5) is 46.0% and 61.1%, respectively. The release is pH responsive and can release more drugs under acidic conditions; ZCZTP has good biocompatibility and blood compatibility. The hemolysis rate of 400 μ g/mL ZCZTP on Balb/c mouse blood is less than 5%. ZCZTP can enter 4T1 cells through endocytosis and accumulate in lysosomes. After treatment with 10 ug/mL ZCZTP, the survival rate of 4T1 cells decreased by 62.49%.

Abstract:Using Scutellaria baicalensis polysaccharide (SBP) as the raw material, the weighted value (Q) of the phosphate content and the hypoglycemic activity in vitro was used as the evaluation index. The process parameters for the phosphorylation of SBP were optimized through single-factor experiments, and the physicochemical properties and hypoglycemic activity in vitro before and after the phosphorylation modification of SBP were compared. The results showed that when the molar ratio of polysaccharide to phosphorylation reagent was 1:10 and the phosphorylation modification was carried out at 80 ℃ for 2 h, the Q value of SBP reached its maximum. Under these conditions, three parallel validation experiments were conducted, and the Q values of phosphorylated polysaccharide SBP-P were 50.25, 49.29, and 49.62, respectively, with a deviation of 0.006, which was within the allowable error range. After modification, an absorption peak of the P=O group stretching vibration appeared at 1237 cm-1 in the IR spectrum of SBP-P, with a phosphate content of (2.74±0.07)%. The typical characteristic absorption peaks of polysaccharides were basically maintained, indicating that the phosphorylation modification was successful and did not affect the basic structure of SBP. Compared with SBP, the molecular weight of SBP-P increased to 4 225 615 g/mol, the particle size decreased to (307.87±63.06) nm, the absolute value of the Zeta potential increased to (16.63±1.37) mV, and the micro-morphology changed from a smooth flake shape to a rough blocky aggregation. Within the tested concentration range, the hypoglycemic activity of SBP-P was significantly enhanced (p <0.05), showing a concentration-dependent effect. When the polysaccharide concentration was 4 mg/mL, the inhibition rates of SBP and SBP-P on α-amylase and α-glucosidase were 65.13%, 65.19%, and 89.39%, 90.29%, respectively, with IC50 values of 0.676, 0.654 mg/mL and 0.085, 0.080 mg/mL, in which SBP-P were close to the IC50 of the positive control acarbose (0.021 and 0.042 mg/mL). It can be seen that phosphorylation modification enhances the water solubility, dispersibility, and stability of SBP by changing its molecular weight, particle size, Zeta potential, and microstructure, thereby enhancing its hypoglycemic activity. SBP-P has the potential to be developed and utilized as a postprandial blood sugar regulatory factor in the fields of food and medicine.

Abstract:Mordenite (MOR) is an efficient catalyst for dimethyl ether (DME) carbonylation reaction. The synthesis of hierarchical Mordenite by using soft templates is an important method to further improve its catalytic performance. In this paper, a solvent-free method was used to synthesize Mordenite with hierarchical structure using sodium dodecyl benzene sulfonate (SDBS) as a soft template. The as-synthesized samples are characterized by X-ray powder diffraction, N2 adsorption desorption, NH3 adsorption desorption, pyridine infrared spectroscopy and other methods. The characterization results indicate that the addition of SDBS could improve the relative crystallinity of the sample, and the addition of SDBS significantly increases the specific surface area, mesoporous volume, and total pore volume of the sample, and improves the mass transfer efficiency of the reaction. Besides, SDBS can induce Al atoms to preferentially enter the 8-member ring channel to form strong acid and medium-strong acid sites during the synthesis process, thereby increasing the number of active sites for carbonylation reactions. The carbonylation reaction of DME was evaluated at 200 °C, 0.5 MPa, GHSV = 2000 mL / (g·h), DME : CO = 97.5 : 2.5 (mol). The results demonstrated that the highest conversion of DME increased by nearly 1.8 times with the addition of 4% SDBS under the premise of maintaining high selectivity of methyl acetate (MA), which exhibited the best carbonylation performance.

Abstract:Using Pd(NO3)2?2H2O as the raw material, sodium dodecyl sulfate (SDS) micelles templates were constructed in a mixed solvent with a volume ratio of anhydrous ethanol to water at 1:4. Rich-defect palladium nanoparticles (Pd-NPs) were then prepared through ultrasonic irradiation technology. TEM, HRTEM, XRD, XPS, and UV-Vis were employed to characterize their micromorphology and structure. The Pd-NPs were utilized as electrocatalysts to investigate their electrochemical behavior towards the methanol oxidation reaction (MOR) in alkaline media (KOH). The results indicated that the Pd-NPs had a particle size of (21.7±3.6) nm and exhibited lattice defects such as grain boundaries, lattice dislocations, lattice expansions, and lattice distortions, which could provide abundant active sites for MOR. The electrochemical active surface area (ECSA) of the Pd-NPs was 62.42 m2/g, and their mass activity reached 2474 mA/mg in a mixed solution of 1.0 mol/L KOH and CH3OH, which was 16.17 times higher than that of commercial Pd/C (153 mA/mg). After 500 cycles of cyclic voltammetry (CV), the mass activity retention rate of the Pd-NPs was 82.00%. During the chronoamperometry (CA) test for MOR over 3600 s, the specific activity of the Pd-NPs was 0.11 mA/cm2. The upward shift of the d-band center of Pd enhanced the adsorption capacity of adsorbates towards Pd, activating the surface of the Pd-NPs and augmenting their catalytic ability.

Abstract:The polysaccharide of Dendrobium officinale (DOP) was extracted from fresh Dendrobium officinale by ultrasonic assisted method and used as active ingredient to prepare Dendrobium officinale whitening cream. Taking the polysaccharide of Dendrobium officinale (DOP) yield as evaluation index, the extraction technology of DOP was optimized by single factor and orthogonal test. The antioxidant activity of DOP was investigated by hydroxyl radical,1, 1-diphenylpicrylphenylhydrazine (DPPH) radical, 2,2" -diazo-di3-ethylbenzothiazolin-6-sulfonic acid (ABTS) cationic radical scavenging test and iron ion reduction (FRAP) method. The moisturizing ability of DOP was detected by in vitro physical analysis. The effects of DOP on the properties of Dendrobium officinale whitening cream were investigated based on the test of antioxidant and moisturizing ability and tyrosinase activity inhibition. The results showed that the optimal extraction conditions of DOP were as follows: ultrasonic time 60 min, solid-liquid ratio (g∶mL) 1:30, ultrasonic times 3, ultrasonic temperature 80 ℃, and the yield of DOP was 34.73%±0.16%. Compared with 1.92 g/L L-ascorbic acid solution, the hydroxyl radical scavenging rate of 1.92 g/L DOP solution was 57.33%±0.03%, which was lower than 98.77%±0.05% of L-ascorbic acid solution. The cationic radical scavenging rate of ABTS was 22.16%±1.24%, much lower than that of L-ascorbic acid (98.01%±0.28%). The scavenging rate of DPPH free radical was 85.45%±0.06%, which was close to 96.24%±0.04% of L-ascorbic acid. FRAP value was 2631.31 μmol/L±67.34 μmol/L, which was close to 2782.83 μmol/L±23.78 μmol/L of L-ascorbic acid. Under the conditions of 85% and 43% relative humidity for 24 h, the DOP moisture retention rates were 96.1%±0.17% and 91.6%±0.31%, respectively. The hydroxyl free radical scavenging rate and DPPH free radical scavenging rate of DPPH cream with DOP 1.5% and niacinamide 2.6% were 25.40%±0.13%, 85.70%±0.30%, FRAP 3735.14 μmol/L±148.38 μmol/L, and the 24 h moisture rate was 90.33%±1.34% under 43% relative humidity. The inhibition rate of tyrosinase was 42.01%±2.73%.

Abstract:The compound essential oil was prepared by microwave extraction method, and the preparation process was optimized by response surface methodology, qualitative and relative quantitative analysis of the compound essential oil was carried out by GC-MS. The anti UVB radiation activity of HaCaT cells was studied by establishing a mouse UVB radiation skin injury model and measuring the expression levels of p53 and PCNA proteins by Western blotting. The results showed that using a 75% ethanol aqueous solution as the extraction solvent, at a liquid to material ratio (mL: g) of 28:1, a power of 385 W, and an extraction time of 32 min, The extraction rate of compound essential oil is 0.624%; A total of 32 chemical components were detected in the compound essential oil, including alcohols, ketones, etc. The relative contents of methyl eugenol, 3,4-dimethoxystyrene, and 3,4,5-trimethoxytoluene were 18.64%, 13.27%, and 12.16%, respectively;The diameter of the inhibition zone of 8μL compound essential oil against Staphylococcus aureus is (18.23) ± (0.25) mm, indicating high sensitivity to inhibition. Its inhibitory effect mainly comes from Scutellaria baicalensis essential oil; Compound essential oils exert a preventive effect against UVB radiation by increasing the activity of SOD and the content of collagen in mouse skin tissue, reducing the level of malondialdehyde (MDA) in mouse skin tissue, and can also repair UVB radiation damage by downregulating the protein expression of p53 and PCNA in HaCaT cells.

Abstract:The Camellia seed protein was extracted by alkali extraction and acid precipitation process with supercritical CO2 extraction and deoiled Camellia seed as raw material, and then the Camellia seed polypeptide solution was prepared by enzymatic hydrolysis with protease. The extraction and enzymatic hydrolysis process of Camellia seed protein was optimized by single factor experiment. The composition of polypeptide and amino acid in camellia seed polypeptide solution was analyzed by liquid chromatography-mass spectrometry. The ability of Camellia seed polypeptide solution to resist aging (anti-oxidation, anti-glycation, anti-wrinkle) and repair (scratch) in cosmetics was investigated by in vitro test. The results showed that the optimum extraction conditions of Camellia seed protein were as follows : solid-liquid ratio (g : mL) 1:30, alkali extraction pH=9.50, extraction temperature 60 °C, extraction time 2 h, acid precipitation pH=3.50. Under these conditions, the extraction rate of Camellia seed protein was 5.05%. The optimal conditions for the enzymatic hydrolysis of Camellia seed protein were as follows : papain was used as the enzyme, the amount of enzyme added was 3000 U/g, the enzymatic hydrolysis time was 2h, and the substrate mass fraction was 2%. Under these conditions, the hydrolysis rate of Camellia seed protein hydrolysate was 31.56%.The total peptide content in the Camellia seed polypeptide solution was 0.47908%, which was mainly a short peptide with a peptide length of 4-8 peptides. The total average molecular weight (molecular weight) was 850.56 Da, and the proportion of polypeptides with relative molecular weight less than 2000 Da was 99.56%. The polypeptide solution of Camellia oleifera seeds contained 7 essential amino acids for adults except isoleucine (Ile), accounting for 40.55% of the total amino acid content. The scavenging rate of 1,1-diphenyl-2-picrylhydrazyl (DPPH) free radical was 71.76%±0.34% when the concentration of Camellia seed polypeptide was 8%.The inhibition rate of 1% Camellia seed polypeptide solution on advanced glycation end products (AGEs) was 32.63%±0.78%. The relative expression rate of MMP-1 in HSF cells was 56.96%±0.82%, the relative expression rate of type III collagen was 120.45%±0.24%, the relative expression rate of type IV collagen was 113.24%±0.17%, and the relative expression rate of type V collagen was 138.33%±2.72%. The relative expression rate of zebrafish col1 a1 a gene was 122.64%±2.07% in 0.05% Camellia seed polypeptide solution. The migration rate of human immortalized keratinocyte (HaCaT) cells in 0.4% Camellia seed peptide solution was 40.95%±0.36%.

Abstract:In order to improve the adsorption capacity of a single type of adsorbent (geopolymer or biochar), a geopolymer-biochar composite material G3.0BC10 was prepared by using slag and corn straw biochar as raw materials and sodium hydroxide as an activator. The adsorption performance of G3.0BC10 on Pb2+ was tested by aqueous solution adsorption experiments. The effects of solution pH value and G3.0BC10 dosage on its Pb2+ adsorption performance, as well as the effects of metal ions (Cu2+, Zn2+) and organic matter (phenol) on its Pb2+ adsorption performance were investigated. The kinetics, isotherm and recycling performance of G3.0BC10 for Pb2+ adsorption were explored. Based on XRD, SEM, FTIR and BET characterization, the adsorption mechanism of Pb2+ by G3.0BC10 was speculated. The results showed that the specific surface area (55.6m2/g) of G3.0BC10 prepared with a silicon-aluminum ratio of 3.0 and a corn straw biochar addition of 10 % of the total mass of the slag was 258.7 % higher than that of G3.0 (15.5m2/ g) prepared without corn straw biochar. The number of functional groups such as hydroxyl and carboxyl groups increased significantly.When the pH of the solution was 5~7 and the dosage of G3.0BC10 was 1 g, the Pb2+ removal rate of 100 mL lead nitrate with mass concentration of 500 mg/L reached more than 99 %. The adsorption of Pb2+ by G3.0BC10 was a monolayer adsorption process dominated by physical adsorption, which was more in line with the pseudo-second-order kinetic model (R2=0.9354) and Langmuir isotherm adsorption model. The maximum theoretical adsorption capacity was 1274.217 mg/g ; the presence of metal ions (Cu2+, Zn2+) will reduce the adsorption capacity of G3.0BC10 for Pb2+ by 4.61 %, and the presence of organic matter (phenol) will slightly increase the adsorption capacity of G3.0BC10 for Pb2+ by 0.16 %. After 6 cycles, the removal rate of Pb2+ by G3.0BC10 decreased from 99.5 % to 80 %. The adsorption mechanism of Pb2+ by G3.0BC10 includes complexation, ion exchange and structural adsorption. The addition of biochar improves the pore structure of geopolymer, increases its specific surface area and provides abundant oxygen-containing functional groups.

Abstract:The N-doped spherical porous carbon NSACx was prepared from carbon precursor using cation exchange resin as raw material and NH4HCO3 as N source at high-temperature activation. The surface physical and chemical properties for spherical porous carbon were characterized by BET、SEM、FTIR、XPS and Zeta, and the adsorption performance for chloramphenicol hydrochloride and levofloxacin on spherical porous carbon were investigated. The result showed that the NSACx has a spherical hierarchical structure, when the activation time is 2 h, the specific surface area of as-made NSAC2 is 1612 m2·g-1 and a total pore volume of 1.39 cm3·g-1; The surface of NSAC2 contains abundant C, O, and N functional groups, which can react with two antibiotics through electrostatic adsorption, hydrogen bonding, π-πinteraction; The adsorption isotherm and adsorption kinetics were consistent with Langmuir model and pseudo-second-order kinetic model, the theoretical maximum adsorption capacities of chloramphenicol hydrochloride and levofloxacin by NSACx are 397 mg·g-1and 645 mg·g-1, respectively, showing better adsorption performance.

Abstract:In this study, the photocatalytic performance of g-C?N? was enhanced by combining doping and heterojunction methods. Co-doped with elemental nitrogen and oxygen (N/O/g-C?N?), was combined with bismuth oxychloride (Bi9O13.5Cl2) to form heterojunction materials (Bi9O13.5Cl2-N/O/g-C3N4). It was synthesized through a calcination-solvent heat-calcination method using dicyandiamide, oxalic acid dihydrate, bismuth nitrate pentahydrate, and ammonium chloride. These materials were synthesized using a doping technique and heterojunction modulation to enhance the photocatalytic performance of g-C?N?. The results indicated that the co-modulation approach broadened the material"s light absorption range and reduced its band gap, enhancing the generation of photogenerated carriers. The degradation effect of the modified photocatalytic material on tetracycline reached 98.4% at 120 min. The environmental adaptability of the material was verified through experiments, and the degradation effect on tetracycline was still more than 80% under the influence of strong acid and strong alkali and different anions and cations, and it could reach 100% under neutral and weak alkaline conditions. The degradation efficiency of 79.6% was preserved after five cycles, showing good photocatalytic degradation effect, stability and practical applicability. Common anions (Cl-, SO?2?) and cations (K?, Ca2?, Na?, Mg2?) slightly reduced the degradation performance of NOBCN on TCH, with the degradation rate decreasing by 8.5% to 11.7% at 120 minutes. In contrast, HCO?? and NO??, while occupying the active sites and potentially affecting degradation, promoted the production of free radicals as photosensitizers, resulting in negligible effects on degradation (-0.2%, -1.4%). The material demonstrates good resistance to both anionic and cationic influences, exhibiting excellent environmental adaptability. ?OH and?O2- are the active species involved in the photocatalytic degradation of TCH by NOBCN. O doping enhances the generation of hydroxyl radicals, which plays a key role in improving the degradation rate of TCH and is the primary factor contributing to its adaptability in complex environments.

Abstract:In this experiment, NiO/Ag/g-C3N4? ternary composites were synthesized by loading NiO andAg onto the g-C3N4? surface using impregnation and photoreduction methods. The composites were characterized by XRD, FT-IR and PL, etc. The catalytic activity of photocatalyst was? evaluated by the degradation? of oxytetracycline under photo-Fenton?? catalysis.??? The??? experimental?? results??? showed??? that?? the??? composite heterojunction photocatalyst had more efficient catalytic effect on the degradation of oxytetracycline? compared? to? pure? g-C3N4,? NiO,? and? NiO/g-C3N4.? When? 20? mg? of 20%-NiO/Ag/g-C3N4???? was??? added??? at?? pH=6,??? the??? photocatalytic?? degradation??? of oxytetracycline under visible light (λ>420 nm) for 120 min was 89.3%. The hydroxyl radical ( ?OH) and the superoxide radical ( ?O2-) played a major influence in photo-Fenton catalyzed degradation.

Abstract:In order to keep the shale stable during drilling and to achieve high-pressure resistant plugging of micro- and nano-scale pores and fractures in the formation, a synthetic emulsion (OSE) was prepared by emulsifying water-soluble and oil-soluble nonionic surfactants as raw materials, which was then combined with lithium silicate (LS) to prepare lithium silicate/emulsion composite plugging agent (LOSE), and particle size and zeta potential, biomicroscope, and a surface tension tester were used to The particle size distribution, microscopic morphology and surface tension of LOSE were determined. LOSE was added to the bentonite base slurry, and the effects of m(OSE):m(LS) on the rheological properties of LOSE, such as apparent viscosity, plastic viscosity, and yield stress, were examined through the rheological filtration loss and blocking performance test experiments, and the effects of the LOSE additive amount (mass percentage based on the mass of the base slurry, hereinafter the same) on the rheological and filtration performance of drilling fluids before and after aging were explored. The blocking action mechanism of LOSE was speculated by particle size and zeta potential and SEM characterization. The results showed that m(OSE):m(LS) = 2:2 was the optimal compounding ratio for the preparation of LOSE, and the median particle size of the prepared LOSE-22 was 2.50 μm; the surface tension of LOSE-22 was reduced to 36.47 mN/m; the API filtration loss in the drilling fluid was reduced by 29.1% from 22 mL to 15.6 mL when LOSE-22 was added at a dosage of 4%; the API filtration loss in the drilling fluid was decreased by 29.1% from 22 mL to 15.6 mL at the dosage of 4%; the API filtration loss in the drilling fluid was decreased by 29.1% from 22 mL to 15.6 mL at the dosage of 4%. LOSE-22 at 1% can reduce the volume fraction of base slurry intruding into the sand bed from 100% to 50%, and reduce the median particle size of WBDFs before aging by 58.8%; at 3% LOSE-22, the volume fraction of drilling fluid intruding into the sand bed is 71%, and the API filtration loss is 16.0 mL, which shows the best combination of filtration loss reduction and blocking effect. LOSE-22 synergizes with the film-forming effect of LS through the tail hydrophobicity of nonionic surfactant to achieve the effect of sealing and protecting the reservoir.

Abstract:Abstract: Cationic core-shell microspheres were prepared by reverse emulsion secondary polymerization, and slow-expanding core-shell nanomicrospheres (PAEs) were synthesized by incorporating shell materials with anionic monomers and cationic initiators using anionic interactions as well as a cationic initiation mechanism. The microspheres were characterized using FTIR, TGA, H-NMR, SEM and TEM to evaluate the chemical stability, interfacial tension and wetting ability. The water-absorption and swelling properties and the drive modulation properties of PAE microspheres were evaluated. The results show that the core-shell microsphere emulsion has good dispersibility and stability, rapid dispersion within 3 min and no delamination for 24 h. The 0.5% core-shell microsphere emulsion can reduce the interfacial tension from 70.1 mN/m to 1.12 mN/m. The normal microsphere expands rapidly by 12.33% in 3 days at 65 ℃, whereas the core-shell nano-microsphere can be swollen slowly for 35 days, and the expansion factor can be up to 13.51. The PAE microsphere can also be swelled by the core-shell nano-microsphere at 65 ℃. Through the simulated sand-filled tube experiment, the oil repulsion rate of PAE was 73.11%, and the recovery increase could be up to 11.23%. The core-shell nano-microspheres are expected to solve the problem of conventional polyacrylamide enhanced recovery which is difficult to be injected in low-permeability reservoirs, and synergistically improve the dissection and enhanced recovery of nano-microspheres.

Abstract:Deep reservoirs are prone to bottom water channeling in the production process, and formation water entering the reservoir affects the recovery efficiency. Due to the high salinity of formation water, conventional gels have poor gelling effect, low strength and poor sealing effect. In order to solve this problem, the temperature and salt-resistant thickener TS-2 was prepared by acrylamide (AM), 2-acrylamide-2-methylpropanesulfonic acid (AMPS) and 4-acrylylmorpholinium (ACMO). TS-2 was successfully synthesized by FIIR and 1H NMR. The high temperature salt-resistant and slow crosslinking gel TSP-2 was prepared by using chromium acetate as crosslinking agent. The gel formation time was 6d at 150℃, and the final apparent viscosity was 94400cP. Through SEM characterization, viscoelastic testing and plugging ability testing, it can be seen that TSP-2 has a rich and ordered cross-linked network structure, which makes it have a stable internal structure under different shear stress and frequency. The sand filled pipe in the range of 400~900mD has a good plugging effect, and the plugging rate is more than 96.12%. The breakthrough pressure gradient can reach more than 4.52MPa/m.

Abstract:In this study, two novel single-component photoinitiators (PIs) based on thioxanthone derivatives, named CLT1 and CLT2, were synthesized by covalently linking thioxanthone framework with hydrogen-donors 1,2-dimethoxybenzene and 2,3-dihydrobenzo[b][1,4]dioxine through a chalcone structure. The performance of these PIs was comprehensively evaluated using variety of methods including UV-visible absorption spectroscopy, fluorescence emission spectroscopy, steady-state photodegradation tests, thermal stability tests, and photopolymerization kinetic tests. These results indicate that the novel PIs CLT1 and CLT2 possess not only excellent UV-visible light absorption capabilities but also outstanding thermal stability and photopolymerization initiated efficiency. Particularly, CLT1 and CLT2 exhibited double-bond conversion rates exceeding 90% in the polymerization of the monomer TPGDA at various concentrations, higher than that of the commercial ITX system, exhibiting potential value in practical application.

Abstract:Polyvinyl acetate emulsion has the advantages of environmental protection and room temperature curing. It has great application potential in wood-based adhesives, but its water resistance is poor. In this study, citric acid was used to modify polyvinyl acetate, and the effect of citric acid on the performance of the emulsion was investigated, aiming to improve its water resistance and be used in the wood industry to enhance its bonding performance. The structure of the adhesive was characterized by Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD). It was found that CA could react with hydroxyl groups in the polymer, and CA has little effect on the crystallinity of the adhesive. Differential scanning calorimetry (DSC) and thermogravimetric analysis showed that the addition of CA improved the heat resistance of the polymer, and the glass transition temperature increased from 39.39 ℃ to 41.5 ℃ and then decreasing. The water absorption performance and contact angle tests showed that as the amount of CA added increases, the water absorption expansion rate is the lowest when CA is 5%, and the maximum contact angle is 86.91 °. CA significantly improves the bonding strength. When the amount of CA added is 5%, the wet bonding strength of plywood reaches 1.22 MPa, meeting the strength requirements of Class II plywood.