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Strong effects of Tween 20 additive on the morphology and performance of poly(vinylidene fluoride) hollow‐fiber membranes
Author(s) -
Chen ShengChang,
Chang HsuHsien,
Cheng TungWen,
Su YanLin,
Cheng LiaoPing
Publication year - 2017
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.44600
Subject(s) - membrane , attenuated total reflection , morphology (biology) , crystallite , materials science , fluoride , chemical engineering , fourier transform infrared spectroscopy , scanning electron microscope , polymer chemistry , fiber , hollow fiber membrane , chemistry , composite material , inorganic chemistry , biochemistry , biology , engineering , metallurgy , genetics
ABSTRACT Poly(vinylidene fluoride) (PVDF) hollow‐fiber membranes were prepared from a Tween 20/water/triethyl phosphate/PVDF system. The effects of Tween 20 on the morphology and properties of the membranes were explored. Field emission scanning electron microscopy imaging indicated the presence of skinlike layers on both surfaces of the membranes. In the cross section, a bicontinuous morphology comprised of interlocked crystallites was observed. As the dosage of Tween 20 was raised, the size and quantity of nanopores on the surfaces increased, and the morphology of the crystallites in the cross section changed from sheaflike to sticklike. Tween 20 was removed almost completely during the membrane‐formation process, as validated by Fourier transform infrared–attenuated total reflection and 1 H‐NMR spectrometry. Dextran filtrations were preformed to demonstrate the potential applications of these membranes in separation processes. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134 , 44600.