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Effects of mixed diluent compositions on poly(vinylidene fluoride) membrane morphology in a thermally induced phase‐separation process
Author(s) -
Li Xianfeng,
Xu Guoqiang,
Lu Xiaolong,
Xiao Changfa
Publication year - 2007
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.27432
Subject(s) - diluent , spherulite (polymer physics) , morphology (biology) , fluoride , materials science , membrane , scanning electron microscope , polymer chemistry , chemical engineering , dibutyl phthalate , phase (matter) , chemistry , nuclear chemistry , polymer , organic chemistry , composite material , inorganic chemistry , biochemistry , genetics , biology , engineering
The effects of a mixed diluent (MD) composition [dibutyl phthalate/dioctyl phthalate (DOP)] on poly (vinylidene fluoride) (PVDF) membrane morphology were investigated with scanning electron microscopy, and a bicontinuous morphology could be obtained with MD in a thermally induced phase‐separation process. The reasons for the morphology formation were explained according to the effect of MD on the phase diagrams. In addition, the effects of the PVDF concentration on the membrane morphology were examined. For the system with less DOP, the large spherulite morphology was obvious under all investigated concentrations, whereas no large spherulite structure existed in the membrane as the DOP content increased to concentrations other than 20%. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci, 2008