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Fabrication and properties of PVDF and PVDF‐HFP microfiltration membranes
Author(s) -
Wang Xinya,
Xiao Changfa,
Liu Hailiang,
Huang Qinglin,
Fu Hao
Publication year - 2018
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.46711
Subject(s) - membrane , materials science , hexafluoropropylene , chemical engineering , microfiltration , diluent , polymer , polyvinylidene fluoride , polymer chemistry , contact angle , crystallization , porosity , fluoride , composite material , copolymer , chemistry , nuclear chemistry , tetrafluoroethylene , inorganic chemistry , biochemistry , engineering
Poly(vinylidene fluoride) (PVDF) and poly(vinylidene fluoride)‐ co ‐hexafluoropropylene (PVDF‐HFP) were used to fabricate porous microfiltration membranes via a thermally induced phase separation (TIPS) method, and dibutyl phthalate (DBP) was used as diluent. The effects of polymer concentration on structure and performance were studied in detail. In addition, the effect of incorporation of hexafluoropropylene (HFP) groups on the membrane was also investigated. The formation mechanism was proposed with the assistance of a phase diagram. The results showed that the incorporation of HFP groups resulted in a lower crystallization temperature ( T c ) of the polymer/DBP system. In addition, the porosity, pure water flux, and ink solution flux decreased with increasing polymer concentration. In contrast, the water contact angle, ink rejection ratio, and mechanical properties had an increasing tendency. When the polymer concentration was 30 wt %, the obtained membrane was most suitable for microfiltration. Furthermore, the incorporation of HFP groups improved the properties of the obtained membrane, including better hydrophobicity, mechanical properties, antifouling property, and chemical resistance. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018 , 135 , 46711.