Research Center for Membrane and Film Technology, Department of Chemical Science and Engineering, Kobe University, Rokkodaicho 1-1, Nada, Kobe 657-8501, Japan.
Engineering Research Center for Membrane and Water Treatment (Ministry of Education), Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China.
J Colloid Interface Sci. 2021 Jul;593:315-322. doi: 10.1016/j.jcis.2021.03.004. Epub 2021 Mar 9.
In this study, positively charged monomers were grafted onto negatively charged membranes via UV radiation to improve the antifouling/antibiofouling properties of the polymeric membrane and the stability of the modification layer. The surface properties, morphologies, antifouling and antibiofouling properties, and stability of the modified membranes were systematically characterized. Results indicated that the introduction of [2-(methacryloyloxy) ethyl] trimethylammonium chloride (MTAC) monomers onto polyethersulfone (PES)/sulfonated polyethersulfone (SPES) membranes effectively increased the surface hydrophilicity. Meanwhile, the surfaces were neutralized with ~0 mV zeta potential in pH 3-10. Moreover, the formation of a polyampholytic copolymer and the antibacterial ability of MTAC considerably improved the antibiofouling properties of the modified membranes. The MTAC-grafted PES/SPES membranes showed excellent antifouling/antibiofouling properties during the treatment of various types of wastewater, including bovine serum albumin solution, oil/water emulsion, and bacterial suspension. Therefore, this study provides a simple and effective method of constructing stable and antifouling membranes for sustainable water treatment.
在这项研究中，通过紫外辐射将带正电荷的单体接枝到带负电荷的膜上，以改善聚合物膜的抗污染/抗生物污染性能和修饰层的稳定性。系统地表征了改性膜的表面性质、形貌、抗污染和抗生物污染性能以及稳定性。结果表明，将[2-（甲基丙烯酰氧）乙基]三甲基氯化铵（MTAC）单体引入聚醚砜（PES）/磺化聚醚砜（SPES）膜上有效地增加了表面亲水性。同时，在 pH 3-10 范围内表面的等电点约为 0 mV。此外，聚两性电解质共聚物的形成和 MTAC 的抗菌能力极大地提高了改性膜的抗生物污染性能。MTAC 接枝的 PES/SPES 膜在处理各种类型的废水，包括牛血清白蛋白溶液、油/水乳液和细菌悬浮液时，表现出优异的抗污染/抗生物污染性能。因此，本研究为可持续水处理提供了一种构建稳定抗污染膜的简单有效方法。
