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Effect of pore forming agent on microstructure and properties of electrospun carbon fiber membrane

Authors： BAI Linzhan, WANG Xinyan, SUN Xichao, HUANG Lilan, GAO Xueli, LI Jiao

Units： School of Materials Science and Engineering, Shandong University of Technology, Zibo 255000, China; Shandong Zhaojin Motian Co., Ltd, Yantai 265400, China; Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao 266100, China

KeyWords： Electrospinning; Flexible carbon fiber; Porous structure; Oil-water separation

ClassificationCode：TQ342.74

year,volume(issue):pagination： 2022,42(6):70-76

Abstract：

A series of flexible carbon fiber membranes were prepared by electrospinning and heat treatment with polyacrylonitrile as carbon source. The effects of doping with different pore formers such as sodium dioctyl sulfosuccinate (NaAOT), zinc acetate (ZnAc) and terephthalic acid (PTA) on the microstructure, mechanics and oil-water separation properties of carbon fiber membranes were comparatively studied. The results showed that a certain number of pore structures appeared in the carbon fiber doped with NaAOT, ZnAc and PTA, and the pores were mainly microporous, microporous, mesoporous and macroporous respectively, compared with the carbon fiber (CF) without pore forming agent. Meanwhile, the flexibility and tensile strength of the membranes doped with pore fomers were stronger than that of the CF membrane without pore forming agent. Among them, the carbon fiber membrane doped with ZnAc (ZnAc-CF) exhibited the best flexibility and the highest tensile strength (0.97 MPa). In addition, the doping of three pore forming agents increased the diameter of carbon fiber, resulting in better hydrophobic properties of CF-NaAOT, CF-ZnAc and CF-PTA membranes. CF-ZnAc membrane showed the most outstanding oil-water separation performance, and the oil flux could reach 3440 L/(m2·h). After 50 cycles of separation of non-emulsified oil-water mixture, the separation efficiency of CF-ZnAc could maintain at about 98%.

Funds：

招远工业技术研究院创新研究基金项目（220192）

AuthorIntro：

白林战（1997-），男，山东济宁人，硕士生，主要从事功能膜电纺制备及性能研究

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