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Preliminary study on the formation of uniform pore structure on PVC membrane surface
Authors: WANG Changmeng, SHI Le, YAN An, WU Chunrui, LU Xiaolong
Units: State Key Laboratory of Separation Membranes and Membrane Processes, School of Materials Science and Engineering, Tiangong University, Tianjin 300387, China
KeyWords: PVC membrane; nonsolvent induced phase separation ;homogeneous pore structure; microporous membrane
ClassificationCode:TQ028.8
year,volume(issue):pagination: 2022,42(4):59-64

Abstract:
  In this paper, ethylenediamine (EDA) was introduced into the casting solution to promote the elimination reaction of polyvinyl chloride (PVC) molecular chains to form carbon carbon double bond, and then the film was formed by phase separation to obtain a more uniform pore structure on the surface of PVC membranes. The effects of EDA addition, reaction temperature and time on the pore structure and uniformity of PVC membrane surface were studied. The physicochemical structure and distribution of PVC membrane surface were analyzed by atomic force infrared spectroscopy, scanning electron microscopy and X-ray photoelectron spectroscopy. It is found that with the increase of EDA addition, the increase of reaction temperature and reaction time can promote the increase of PVC membrane surface pore size and uniformity.

Funds:
国家自然科学基金面上项目(51978466);国家自然科学基金重点项目(51638011)

AuthorIntro:
王昌萌(1994-),男,山东郓城人,硕士生,主要从事膜分离的的研究

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