近年来,通过表面工程技术将亲水组分引入膜表面来改善分离膜抗污染性能的研究越来越广泛,聚电解质是带有可电离基团的长链高分子,具有良好的亲水性和可控的荷电性,将其用于分离膜改性中能有效提高分离膜的抗污染能力.本文系统综述了近年来聚电解质改性膜的制备方法和抗污染机理,并总结了聚电解质改性膜的袁征方法和潜在应用领域,展望了聚电解质改性在提高分离膜抗污染性研究的发展趋势,以期为提高膜材料的性能和拓展其应用范围奠定理论基础.
Recently,the research on improving the performance of separation membranes by introducing hydrophilic components onto their surface via surface engineering technology becomes more and more popular.Polyelectrolytes are kinds of long-chain polymers with ionogens,which have good hydrophilicity as well as controllable charge.Membrane modification with polyelectrolytes can improve effectively anti fouling performance of separation membranes.In this paper,the modification methods of the membranes using polyelectrolytes were reviewed in details and the anti-fouling mechanisms of these modified membranes were discussed.The characterization methods and potential applications were also summarized and a further prospective on polyelectrolyte modification to improve membrane anti-fouling performance was given.It is hoped that this article can lay the theoretical basis on improving the performance of membrane materials and expand the scope of their applications.
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