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首页> 外文期刊>RSC Advances >Improved antifouling property of PVDF ultrafiltration membrane with plasma treated PVDF powder
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Improved antifouling property of PVDF ultrafiltration membrane with plasma treated PVDF powder

机译：等离子体处理过的PVDF粉末改善了PVDF超滤膜的防污性能

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摘要

In this work, a novel modification method was introduced to improve the antifouling property of polyvinylidene fluoride (PVDF) ultrafiltration membranes, which were prepared with a one-pot process using plasma pretreatment and graft polymerization of PVDF powder. The amphiphilic copolymer of polyvinylidene fluoride-g-polyacrylic acid (PVDF-g-PAA) present in the modified PVDF membrane was demonstrated by infrared spectroscopy (ATR-FTIR) and X-ray photoelectron spectroscopy (XPS). The improved wetting ability was conducive to improve the water flux, bovine serum albumin rejection and antifouling ability of modified PVDF membranes. A totally novel pH quantitative method was employed to investigate the antifouling property based on the acid-base reaction of the amino acid residues of BSA (pollutant), according to the detected change of BSA adsorption amount on membrane surface and pore surface before and after modification, less irreversible fouling was detected in the modified PVDF membrane due to the existence of PVDF-g-PAA, and it was more convenient to remove the pollutants in the pores of modified PVDF membranes by water flushing.
机译：在这项工作中，引入了一种新的改性方法来改善聚偏二氟乙烯（PVDF）超滤膜的防污性能，该膜是通过等离子预处理和PVDF粉末的接枝聚合反应通过一锅法制备的。通过红外光谱（ATR-FTIR）和X射线光电子能谱（XPS）证明了改性PVDF膜中存在的聚偏二氟乙烯-g-聚丙烯酸（PVDF-g-PAA）两亲共聚物。改进的润湿能力有利于提高改性PVDF膜的水通量，牛血清白蛋白排泄率和防污能力。根据检测到的改性前后BSA在膜表面和孔表面的吸附量的变化，采用一种全新的pH定量方法研究基于BSA（污染物）氨基酸残基的酸碱反应的防污性能。 ，由于存在PVDF-g-PAA，在改性PVDF膜中检测到较少的不可逆结垢，并且通过水冲洗去除改性PVDF膜孔中的污染物更方便。

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