基于动态硼酸酯键/氢键的自修复水凝胶的制备及性能
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陕西科技大学 轻工科学与工程学院

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TQ352.4;TQ326.4

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生物质化学与材料国际联合研究中心(2018GHJD-19);陕西省重点产业创新链项目(2020ZDLGY11-03);西安市未央区科技计划(201910);中国-中东欧国家高校联合教育项目(2021099)


Preparation and properties of self-healing hydrogels based ondynamic borate bonds/hydrogen bonds
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1.Shaanxi University of Science and Technology;2.Shaanxi University of science and technology

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    摘要:

    设计了一种新型苯硼酸离子液体(PBA-IL)单体,在TEMPO氧化CNFs的存在下,通过丙烯酰胺(AM)和PBA-IL的一步聚合法,制备了一种具有半互穿网络结构的自修复水凝胶(PAM/PBA-IL/CNF)。通过1H NMR对PBA-IL的化学结构进行分析;通过FT-IR、XPS、SEM对水凝胶的化学结构和物理形貌进行表征;通过拉力试验和自修复实验对其力学性能和自修复性进行测试。结果表明,PBA-IL单体和水凝胶的成功制备,水凝胶具有优异的自修复性能,当PBA-IL的质量分数为30%时,PAM/PBA-IL3/CNF水凝胶的自修复效率为95.43%(150 min内),并且修复后水凝胶的拉伸强度(319.5 kPa)和断裂伸长率(1950.3%)接近于初始的水凝胶。PAM/PBA-IL/CNF水凝胶的自修复性归因于PAM/PBA-IL共聚物与CNFs链上顺式二羟基形成的硼酸酯键及水凝胶内部多重氢键的协同作用。

    Abstract:

    A novel phenylboronic acid ionic liquid (PBA-IL) monomer was designed, and the self-healing hydrogel (PAM/PBA-IL/CNF) with semi-interpenetrating network was prepared by a one-step polymerization of acrylamide (AM) and PBA-IL in the presence of TEMPO-oxidized CNFs. The chemical structure of PBA-IL was analyzed by 1H NMR. The chemical structure and physical morphology of the hydrogel were characterized by FTIR, XPS and SEM. The mechanical properties and self-healing properties were tested by tensile test and self-healing experiment. The results showed that the PBA-IL monomer and the hydrogel were successfully prepared, and the hydrogel exhibited excellent self-healing properties. When the mass fraction of PBA-IL was 30%, the self-healing efficiency of PAM/PBA-IL3/CNF hydrogel was 95.43% (within 150 min). And the tensile strength (319.5 kPa) and elongation at break (1950.3%) of the self-healed PAM/PBA-IL3/CNF hydrogel approached that of the original hydrogel. The self-healing properties of PAM/PBA-IL/CNF hydrogels were attributed to the synergistic effect of the boronate bonds formed by the PAM/PBA-IL copolymers with the cis-diols on the CNFs chain and the multiple hydrogen bonds inside the hydrogels.

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姚雪,张素风,钱立伟.基于动态硼酸酯键/氢键的自修复水凝胶的制备及性能[J].精细化工,2023,40(2):

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历史
  • 收稿日期:2022-07-08
  • 最后修改日期:2022-08-30
  • 录用日期:2022-09-05
  • 在线发布日期: 2023-01-17
  • 出版日期: 2022-09-30