超亲水性
生物污染
膜
化学工程
材料科学
润湿
接触角
甲基丙烯酸酯
乳状液
吸附
蛋白质吸附
结垢
Zeta电位
色谱法
过滤(数学)
聚合物
化学
有机化学
纳米颗粒
纳米技术
复合材料
共聚物
生物化学
数学
工程类
统计
作者
Anubhav Kumar,Kanupriya Nayak,Alexander S. Münch,Petra Uhlmann,Andreas Fery,Bijay P. Tripathi
标识
DOI:10.1016/j.seppur.2022.120887
摘要
One of the most successful methods for reducing membrane fouling in filtration and separation applications is zwitterionic surface modification. Herein, poly[(2-methacryloyloxyethyl phosphorylcholine)-co-(glycidyl methacrylate)] (poly(MPC-co-GMA)) was synthesized as a zwitterionic polymer and grafted onto the polysulfone (PSF) microfilter membrane using polydopamine chemistry. The stepwise modifications and formation of the zwitterionic PgEDgMG membrane were established by analyzing chemical structure, surface morphology, charge, and wetting properties. The antifouling properties were established by bovine serum albumin (BSA) protein adsorption as low as 3.71 ± 0.78 µg cm−2, fluorescence imaging, and in-situ BSA adsorption via zeta potential measurements. After zwitterionization, the in-air and underwater oil wetting tests demonstrate the formation of superhydrophilic and superoleophobic membranes, which are critical for oil-water separation. Finally, the prepared membranes were evaluated in batch and continuous mode for soybean and silicone oil-water emulsion separation. The modified membrane demonstrated nearly complete oil rejection (>99%) and flux recovery up to 99% after a continuous 10-cycle operation along with retention of initial flux during continuous filtration for 12 h. Overall, the combination of polydopamine and poly(MPC-co-GMA) created a robust zwitterionic antifouling surface which induces superhydrophilic character and can be used for long-term water purification and sep-aration applications.
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