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首页> 外文期刊>RSC Advances >Tuning the antifouling property of PVDF ultrafiltration membrane with surface anchored polyelectrolyte complexes for sewage treatment
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Tuning the antifouling property of PVDF ultrafiltration membrane with surface anchored polyelectrolyte complexes for sewage treatment

机译：用表面锚定的聚电解质配合物调节PVDF超滤膜的防污性能

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摘要

The polyelectrolyte complex (PEC) layer fabricated by chitosan and sodium alginate was anchored on a membrane surface though plasma treatment and layer by layer self-assembly to improve the antifouling properties of the PVDF membrane. The interface properties of modified PVDF membranes were investigated and the results indicated the presence of the PEC layer was conducive to enhance the hydrophilicity and screening ability of the PVDF ultrafiltration membrane due to the hydrophilic crosslinking structure. Furthermore, the fouling resistance including anti-adsorption ability and dynamic antifouling ability for pollutant filtration of modified PVDF membranes were significantly improved due to the anchored PEC layer. For the CS-SA-3 membrane with an assembly number of 3, the adsorption mass of BSA on the membrane surface was only 4 mu g cm(-2) and the FRR-W values increased to 89%, 99% and 98% for the three typical pollutants of bovine serum albumin, sodium alginate and humic acid, respectively. It was demonstrated that the PEC layer could be used as an antifouling material to improve the antifouling ability of hydrophobic membranes though decreasing the reversible fouling. This article also aimed to provide a simple method to fabricate the antifouling interface.
机译：通过壳聚糖和藻酸钠制造的聚电解质复合物（PEC）层通过等离子处理和逐层自组装来锚固在膜表面，以提高PVDF膜的防污性能。研究了改性PVDF膜的界面性能，结果表明PEC层的存在有利于提高亲水性和亲水交联结构对PVDF超滤膜的筛选能力。此外，由于锚定的PEC层，显着提高了用于改性PVDF膜的污染物过滤的抗污性，包括抗吸附能力和动态抗污能力。对于组装数为3的CS-SA-3膜，BSA在膜表面的吸附质量仅为4μg cm（-2），FRR-W值分别增加到89％，99％和98％分别是牛血清白蛋白，藻酸钠和腐殖酸的三种典型污染物。证明了PEC层可以用作防污材料以提高疏水膜的防污能力，同时减少可逆的污垢。本文还旨在提供一种制造防污界面的简单方法。

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