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Morphology and performance of PVDF TIPS microfiltration hollow fiber membranes prepared from PVDF/DBP/DOP systems for industrial application
Author(s) -
Zhou Qianhua,
Wang Zhan,
Shen Haijun,
Zhu Zhongya,
Liu Liping,
Yang Libin,
Cheng Lina
Publication year - 2016
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/jctb.4755
Subject(s) - membrane , materials science , microfiltration , dibutyl phthalate , chemical engineering , morphology (biology) , fiber , pervaporation , membrane technology , fluoride , polymer chemistry , composite material , chemistry , permeation , inorganic chemistry , biochemistry , biology , engineering , genetics
BACKGROUND This research focused on the impacts of different dibutyl phthalate ( DBP )/dioctyl phthalate ( DOP ) weight ratios on the surface morphology and the properties of poly (vinylidene fluoride) ( PVDF ) thermally induced phase separation ( TIPS ) microfiltration hollow fiber membranes. The phase diagrams of PVDF / DBP / DOP systems were determined and the optimum weight ratio DBP / DOP in the liquid–liquid region of the binary phase diagram was chosen to form a membrane with interconnected sponge‐like structure. Optimum processing temperature was determined based on analysis of the phase diagrams and industrial applications. In addition, the morphology and properties of the membranes were characterized as well as the performance of the membrane modules. RESULTS Suitable processing temperature range for the PVDF TIPS process was from 430 to 493 K. A PVDF concentration of 35 wt% and weight ratio DBP / DOP of 1/2 provided the most appropriate membrane for industrial application. CONCLUSIONS The optimum processing temperature range for the PVDF TIPS process was determined. The weight ratio DBP / DOP in PVDF / DBP / DOP systems played an important role in preparing PVDF TIPS microfiltration hollow fibers with superior properties giving membranes suitable for industrial application. © 2015 Society of Chemical Industry