Structure and pH‐sensitive properties of poly (vinylidene fluoride) membrane changed by blending poly (acrylic acid) microgels |
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| Authors: | Yang He Xi Chen Shiyin Bi Congcong Shi Li Chen Liying Li |
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| Affiliation: | 1. School of Materials Science and Engineering, Tianjin Polytechnic University, , Tianjin, 300387 PR China;2. State Key Laboratory of Hollow Fiber Membrane Materials and Processes, Tianjin Polytechnic University, , Tianjin, 300387 PR China;3. School of Environment and Chemical Engineering, Tianjin Polytechnic University, , Tianjin, 300387 PR China |
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| Abstract: | pH‐sensitive poly (vinylidene fluoride) (PVDF)/poly (acrylic acid) (PAA) microgels membranes are prepared by phase inversion of the N, N‐dimethylformamide solution containing PAA microgels and PVDF in aqueous solution. The composition and structure of the blend membrane are investigated by Fourier transform infrared spectra, X‐ray photoelectron spectroscopy measurements, thermo gravimetric analysis, field‐emission scanning electron microscope and atomic force microscope. The results indicate the surface and cross section of the blend membranes have a porous structure with PAA microgels immobilized inside the pore and on the membrane surface. The blend PVDF membranes exhibit pH‐sensitive water flux, with the most drastic change in permeability observed between pH 3.7 and 6.3. The blend membranes are fouled by bovine serum albumin, and their antifouling property is enhanced by increasing PAA microgels, mainly derived from the improved hydrophilic property. Copyright © 2013 John Wiley & Sons, Ltd. |
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| Keywords: | poly (vinylidene fluoride) microgel pH‐sensitivity poly (acrylic acid) antifouling property |
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