To improve the antifouling properties of poly(ether ether ketone) (PEEK) membrane, negatively charged acrylic acid (AA), neutral ethyl hydroxyacrylate (HEA) and positively charged acryloxyethyl trimethylammonium chloride (DAC) as hydrophilic monomers were respectively grafted onto the PEEK hollow fiber membrane surface via ultraviolet irradiation polymerization. The effects of the grafted monomers on surface chemical structure, surface morphology, zeta potential, hydrophilic performance, permeability and the antifouling properties of the membrane were investigated in detail. The results show that the charge state of the membrane surface is closer to the monomer charge characteristic, which obviously affects the permeability and antifouling performance of the membrane. The pure water flux of the membrane grafted with neutral hydrophilic HEA monomer is increased and the antifouling properties to bovine serum albumin (BSA) and sodium alginate (SA) are also enhanced, while the pure water flux of the membranes grafted with negatively charged AA monomer or positively charged DAC monomer is decreased, with different antifouling properties to BSA and SA. Furthermore, the antifouling experiment with BSA under different pH conditions revealed that membrane fouling depends on the pH value, and membrane fouling was the most serious at the isoelectric point of BSA. © 2020 Society of Chemical Industry

中文翻译：

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接枝单体电荷对紫外辐照聚合聚醚醚酮中空纤维膜防污性能的影响

为了提高聚醚醚酮（PEEK）膜的防污性能，将带负电荷的丙烯酸（AA）、中性羟基丙烯酸乙酯（HEA）和带正电荷的丙烯酰氧乙基三甲基氯化铵（DAC）作为亲水单体分别接枝到PEEK空心膜上。纤维膜表面通过紫外线照射聚合。详细研究了接枝单体对膜表面化学结构、表面形貌、zeta电位、亲水性能、渗透性和防污性能的影响。结果表明，膜表面的荷电状态更接近单体荷电特性，对膜的渗透性和防污性能有明显的影响。中性亲水性HEA单体接枝膜的纯水通量增加，对牛血清白蛋白（BSA）和海藻酸钠（SA）的防污性能也增强，而带负电荷的AA单体接枝膜的纯水通量增加或带正电的 DAC 单体减少，与 BSA 和 SA 具有不同的防污性能。此外，BSA在不同pH条件下的防污实验表明，膜污染取决于pH值，其中BSA等电点处膜污染最为严重。© 2020 化学工业协会 而接枝带负电荷的AA单体或带正电荷的DAC单体的膜的纯水通量降低，对BSA和SA具有不同的防污性能。此外，BSA在不同pH条件下的防污实验表明，膜污染取决于pH值，其中BSA等电点处膜污染最为严重。© 2020 化学工业协会 而接枝带负电荷的AA单体或带正电荷的DAC单体的膜的纯水通量降低，对BSA和SA具有不同的防污性能。此外，BSA在不同pH条件下的防污实验表明，膜污染取决于pH值，其中BSA等电点处膜污染最为严重。© 2020 化学工业协会