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Investigation of Formation for Poly(vinylidene fluoride) Membrane Using Thermally Induced Phase Separation
Jeong Woo Lee1, Kwang Seop Im1, Sang Yong Nam1
1Department of Material Engineering and Convergence Technology, Engineering Research Institute, Gyeongsang National University, Jinju, 52828, Korea.
Abstract:
In this study, thermally induced phase separation (TIPS) was used to fabricate a water treatment membrane composed of poly(vinylidene fluoride) (PVDF) and silica. Dioctyl phthalate (DOP) and dibutyl phthalate (DBP) were used as diluents. Crystallization temperature, cloud point, and morphology were observed to investigate the conditions of PVDF/silica/diluent membrane preparation. SEM revealed that the porosity of the membranes was increased with an increase in silica content. Phase diagram and morphology results revealed that 50 wt% PVDF+silica with a PVDF:silica weight ratio of 4.5:1 is the best composition for manufacturing a porous membrane.
