Chem. J. Chinese Universities ›› 2024, Vol. 45 ›› Issue (10): 20240248.doi: 10.7503/cjcu20240248

• Polymer Chemistry • Previous Articles     Next Articles

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)

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

CLC Number: 

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