文章摘要
许玉芝.不同木质素磺酸钠对豆粕胶黏剂性能的影响[J].精细化工,2021,38(1):
不同木质素磺酸钠对豆粕胶黏剂性能的影响
Effect of different sodium lignosulfonate on properties of soybean meal adhesives
投稿时间:2020-06-15  修订日期:2020-09-23
DOI:
中文关键词: 木质素磺酸钠  豆粕胶黏剂  润湿性  流变性能  湿态胶合强度
英文关键词: sodium lignosulfonate  soybean adhesive  wettability  rheological properties  wet bonding strength
基金项目:国家自然科学基金项目(面上项目,重点项目,重大项目)
作者单位E-mail
许玉芝 中国林科院林产化学工业研究所 xuyuzhi@icifp.cn 
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中文摘要:
      通过FTIR、元素分析、GPC对四种不同来源的木质素磺酸钠进行物理化学性质分析,并将其与水性聚酰胺协同改性豆粕胶黏剂,考察改性前后胶黏剂的浸润性、流变特性、以及所得胶合板的湿态胶合强度等。结果表明,红外谱图中在1065 cm-1附近出现了磺酸基的振动吸收峰;木质素磺酸钠中磺酸基的含量越高,经其改性的豆粕胶黏剂的零剪切粘度越低且在木材表面的润湿性越好,接触角从95 °降到61 °;与水性聚酰胺协同改性后的豆胶制得胶合板的胶合强度达到0.92 MPa,合格率为100%,满足国家Ⅱ类胶合板的标准要求(≥ 0.70 MPa,≥90%)。
英文摘要:
      Physicochemical properties of four different sodium lignosulfonates were studied through FTIR, elemental analysis and GPC. Meanwhile, these lignosulfonates were used to synergistically modify soybean adhesives with polyamideamine-epichlorohydrin. Then, the wettability and rheological properties of the adhesive, as well as the wet bonding strength of the resulting plywood were investigated. As displayed in FTIR spectra of different sodium lignosulfonate, a peak corresponding to S=O of sulfonic group appeared at 1065 cm-1. With higher content of sulfonic groups in the sodium lignosulfonate, zero shear viscosity of the modified soybean adhesive was lower and its wettability on the surface of wood was better, of which the contact angle decreased from 95 ° to 61 °. The wet bonding strength of plywood made using soybean adhesive modified with liquid sodium lignosulfonates and polyamideamine-epichlorohydrin reached 0.92 MPa with 100% percent of pass, which met the national standard for type II plywood (≥0.70 MPa,≥90%).
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