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首页> 外文期刊>Polymers for advanced technologies >Improving the hydrophilic and antifouling properties of poly(vinyl chloride) membranes by atom transfer radical polymerization grafting of poly(ionic liquid) brushes
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Improving the hydrophilic and antifouling properties of poly(vinyl chloride) membranes by atom transfer radical polymerization grafting of poly(ionic liquid) brushes

机译：通过原子转移自由基聚合嫁接聚（离子液体）刷子改善聚（氯乙烯）膜的亲水性和防污性能

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>In this study, poly(1‐butyl‐3‐vinylimidazolium bromide) (PBVIm‐Br) was grafted onto the poly(vinyl chloride) (PVC) membrane surface via a 2‐step atom transfer radical polymerization (ATRP) reaction. Poly(2‐hydroxyethylmethacrylate) (PHEMA) was grafted onto the membrane surface by aqueous ATRP reaction; then, BVIm‐Br was introduced onto the surface of the PHEMA‐modified PVC membrane through traditional ATRP reaction. The analysis of surface chemistry confirmed the successful grafting of PHEMA and PBVIm‐Br on PVC membrane surface, and the grafting density (GD) of PBVIm‐Br gradually increased as the grafting time was prolonged. The modified membrane exhibited a positive charge and significantly enhanced surface hydrophilicity. The static water contact angle of the membrane surface decreased from 92.3° to 51.6° as the GD of the PBVIm‐Br brushes increased. Filtration experiments indicated that the water flux of the modified membrane increased with increasing GD, and their recovered fluxes were more than twice than the original. In addition, the total fouling ratio of the membranes decreased from 89% in M0 to 67% in M5, and most of the fouling was reversible as the GD of PBVIm‐Br brushes increased. These results indicated that the positive charged poly(ionic liquid) brushes featuring hydrophilic properties would have potential applications in membrane separation.
机译： >在本研究中，聚（1-丁基-3-乙烯基咪唑溴硫化物） （将PBVIM-BR）通过2步原子转移自由基聚合（ATRP）反应接枝到聚（氯乙烯）（PVC）膜表面上。通过ATRP反应水溶液将聚（2-羟乙基甲基丙烯酸酯）（PHEMA）接枝到膜表面上;然后，通过传统的ATRP反应将BVIM-BR引入PHEMA改性的PVC膜的表面上。表面化学分析证实了PVC膜表面上的PHEMA和PBVIM-BR的成功接枝，并且随着接枝时间逐渐增加的PBVIM-BR的接枝密度（GD）延长。改性膜表现出正电荷和显着增强的表面亲水性。随着PBVIM-BR刷的GD增加，膜表面的静态水接触角从92.3°达到51.6°降低。过滤实验表明，改性膜的水通量随着Gd的增加而增加，其回收的助熔剂比原始的两倍多。此外，膜的总污垢比率从M0的89％降低至67％的M5，并且由于PBVIM-BR刷的GD增加，因此大多数污垢可逆。这些结果表明，具有亲水性质的正电荷的聚（离子液体）刷子具有膜分离中的潜在应用。

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