高等学校化学学报 ›› 2024, Vol. 45 ›› Issue (10): 20240248.doi: 10.7503/cjcu20240248

• 高分子化学 • 上一篇    下一篇

木质素基聚离子液体膜的制备与应用

杨思卿1, 许神剑1, 唐卿涵1, 缪涵1(), 杨溪2, 林绍梁1()   

  1. 1.华东理工大学材料科学与工程学院, 上海市先进聚合物材料重点实验室, 上海 200237
    2.上海交通大学医学院附属第九人民医院, 上海 200011
  • 收稿日期:2024-05-20 出版日期:2024-10-10 发布日期:2024-08-12
  • 通讯作者: 缪涵,林绍梁 E-mail:hmiao@ecust.edu.cn;slin@ecust.edu.cn
  • 基金资助:
    国家自然科学基金(52325308);上海市浦江计划项目(21PJ1402100)

Preparation and Application of Lignin-based Poly(ionic liquid) Membranes

YANG Siqing1, XU Shenjian1, TANG Qinhan1, MIAO Han1(), YANG Xi2, LIN Shaoliang1()   

  1. 1.Shanghai Key Laboratory of Advanced Polymeric Materials,School of Materials Science and Engineering,East China University of Science and Technology,Shanghai 200237,China
    2.the Ninth People’s Hospital,School of Medicine,Shanghai JiaoTong University,Shanghai 200011,China
  • Received:2024-05-20 Online:2024-10-10 Published:2024-08-12
  • Contact: MIAO Han, LIN Shaoliang E-mail:hmiao@ecust.edu.cn;slin@ecust.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(52325308);the Shanghai Pujiang Program, China(21PJ1402100)

摘要:

通过原子转移自由基聚合(ATRP)反应制备了不同接枝密度的木质素星形接枝聚丙烯酸共聚物(Lignin-g-PAA), 将Lignin-g-PAA与咪唑鎓聚离子液体(PCMVImTFSI)通过原位静电络合, 制备出具有梯度孔结构的木质素基聚离子液体膜(Lignin-PILM). 探究了Lignin-g-PAA接枝密度对薄膜的热稳定性、 表面形貌和孔径分布的影响, 其中, 由中度接枝密度的Lignin2-g-PAA9构建的Lignin-PILM存在纳米梯度孔结构, 并具有良好的热稳定性. 探究了Lignin-g-PAA共聚物含量对薄膜的紫外屏蔽性能的影响, 结果表明, Lignin-g-PAA含量越高, 薄膜的紫外屏蔽性能和可见光透过率越优异.

关键词: 木质素, 接枝聚合物, 聚离子液体, 多孔膜, 紫外屏蔽

Abstract:

Lignin star-shaped grafted poly(acrylic acid) copolymers(Lignin-g-PAA) with different grafting densities were synthesized via atom transfer radical polymerization(ATRP), and then electrostatically complexed in situ with imidazolium-based poly(ionic liquid)(PCMVImTFSI) to prepare lignin-based polyelectrolyte membranes(Lignin-PILM) with gradient pore structures. The influence of grafting density of Lignin-g-PAA on the thermal stability, surface morphology, and pore size distribution of the membrane was investigated. Specifically, Lignin-PILM constructed by Lignin2-g-PAA9 with moderate grafting density exhibited a gradient nano-pore structure and excellent thermal stability. Subsequently, the effect of Lignin-g-PAA copolymer content on the UV shielding performance of the membrane was explored. The study revealed that higher Lignin-g-PAA content resulted in superior UV shielding capability and visible light transmittance of the membrane.

Key words: Lignin, Grafted polymer, Poly(ionic liquid), Porous membrane, UV shielding

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