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Improving and tuning the pore structure and performance of thermally cross-linked PAN membrane via the silica aerogel

Authors： WANG Kaifang, LI Lin, ZHANG Yongyue, PENG Shaomeng, WANG Chunlei, LIANG Changhai, WANG Tonghua

Units： 1.School of Petroleum and Chemical Engineering, Dalian University of Technology, Panjin 124221, China; 2. State Key Laboratory of Fine Chemicals, R&D Center of Membrane Science, School of Chemical Engineering, Dalian University of Technology, Dalian 116024

KeyWords： polyacrylonitrile , silica aerogel , pore structure, permeability

ClassificationCode：TQ028.8

year,volume(issue):pagination： 2020,40(3):81-87

Abstract：

Silica sol was prepared by sol-gel method using ethyl orthosilicate (TEOS) as the precursor and introduced into the pores of polyacrylonitrile (PAN) ultrafiltration membranes. Then, the cross-linked PAN (TPS) hybrid membrane with a sponge-like pore structure was prepared through thermally cross-linking reaction. The effects of the concentration of TEOS on the pore structure and permeability of the TPS hybrid membrane was investigated. The results show that the silica aerogel which was introduced into the pores of TPS hybrid membrane restricts the collapse of pore structure during the thermal crosslinking process. With the increase of TEOS concentration, the average effective pore size and water flux of the TPS hybrid membrane both increase. The TPS hybrid membranes have the higher rejection rate for BSA above 98%. Additionally, the hybrid membrane exhibits excellent thermal stability and good solvent resistance.

Funds：

国家重点研发计划项目（2017YFB0603403）；国家自然科学基金(21436009、21676044、21576035, 21878033)；中央高校基本科研业务费（DUT19ZD211、 DUT 2018TB02）资助

AuthorIntro：

第一作者简介：王开放（1993-），男，河南开封人，硕士生，从事聚合物膜研究。* 通讯作者，E-mail：wangth@dlut.edu.cn

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