Structure and pH-sensitive properties of poly (vinylidene fluoride) membrane changed by blending poly (acrylic acid) microgels
Structure and pH-sensitive properties of poly (vinylidene fluoride) membrane changed by blending poly (acrylic acid) microgels
复制标题
共混聚丙烯酸微凝胶改变聚偏二氟乙烯膜的结构及pH敏感性能
DOI：
10.1002/pat.3167
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发表时间：
2013-10-01
影响因子：
3.4
通讯作者：
Li, Liying
中科院分区：
文献类型：
--
作者：
He, Yang;Chen, Xi;Li, Liying
以聚偏氟乙烯（PVDF）/聚丙烯酸（PAA）微凝胶为原料，在N，N-二甲基甲酰胺水溶液中进行相转化，制备了pH敏感的PVDF/PAA微凝胶膜。通过红外光谱、X射线光电子能谱、热重分析、场发射扫描电子显微镜和原子力显微镜对共混膜的组成和结构进行了研究。结果表明，共混膜的表面和横截面具有多孔结构，PAA微凝胶固定在孔内和膜表面。共混物PVDF膜表现出pH敏感的水通量，在pH 3.7和6.3之间观察到的渗透性的最剧烈的变化。共混膜被牛血清白蛋白污染，PAA微凝胶的加入提高了共混膜的亲水性能。版权所有（c）2013约翰威利父子有限公司
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 pH3.7 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 (c) 2013 John Wiley & Sons, Ltd.