Chloromethylated polysulfone (CMPSF) microfiltration membrane were first prepared by using immersion‐precipitation phase transformation method, and then CMPSF membrane was modified into aminated PSF membrane (AMPSF membrane). A surface‐initiating system of –NH₂/S₂O₈²⁻ was constituted at the interface between AMPSF membrane and a aqueous solution, in which monomer dimethylaminoethyl methacrylate (DMAEMA) and initiator ammonium persulfate were dissolved. The graft polymerization of DMAEMA was successfully realized on AMPSF membrane, resulting in the grafted membrane PSF‐g‐PDMAEMA. And then quaternization modification of the grafted membrane PSF‐g‐PDMAEMA was performed, resulting in the cationic microfiltration membrane of PSF‐g‐QPDMAEMA. The isothermal adsorption experiments of PSF‐g‐QPDMAEMA membrane for two acid dyes, reactive brilliant red (RBR), and reactive light yellow (RLY), were carried out, and the permeation experiments were also conducted. The experimental results show that PSF‐g‐QPDMAEMA membrane has strong adsorption ability for acid dyes by right of the electrostatic interaction between the quaternary ammonium cations on the surface of PSF‐g‐QPDMAEMA membrane and the sulfonate anions in the molecules of acid dyes as well as by right of cation‐π interaction between the quaternary ammonium cations on PSF‐g‐QPDMAEMA membrane and the aromatic rings in the molecules of acid dyes. PSF‐g‐QPDMAEMA membrane displays excellent rejection and removing performance for acid dyes in water. POLYM. ENG. SCI., 60:900–908, 2020. © 2020 Society of Plastics Engineers

中文翻译：

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PSF-g-QPDMAEMA阳离子接枝微滤膜的制备及其对酸性染料的吸附和排斥性能研究

首先采用浸-沉淀相转化法制备氯甲基化聚砜（CMPSF）微滤膜，然后将CMPSF膜改性为胺化PSF膜（AMPSF膜）。在AMPSF膜和水溶液之间的界面上形成了–NH ₂ / S ₂ O ₈ ^2-的表面引发体系，其中溶解了甲基丙烯酸二甲基氨基乙基乙酯（DMAEMA）和引发剂过硫酸铵。DMAEMA的接枝聚合已在AMPSF膜上成功实现，从而形成了接枝膜PSF- g- PDMAEMA。然后对接枝膜PSF‐ g进行季铵化修饰进行了‐PDMAEMA，形成了PSF‐ g‐ QPDMAEMA的阳离子微滤膜。进行了PSF- g- QPDMAEMA膜对两种酸性染料（活性艳红（RBR）和活性浅黄（RLY））的等温吸附实验，并进行了渗透实验。实验结果表明，PSF- g- QPDMAEMA膜具有较强的酸性染料吸附能力，这是因为PSF- g- QPDMAEMA膜表面的季铵阳离子与酸性染料分子中的磺酸根阴离子之间存在静电相互作用。以及通过PSF- g上季铵阳离子之间的阳离子-π相互作用的权‐QPDMAEMA膜和酸性染料分子中的芳环。PSF- g- QPDMAEMA膜对水中的酸性染料具有出色的排斥和去除性能。POLYM。ENG。SCI。，60：900–908，2020.©2020塑料工程师协会