通过分子设计,采用自由基聚合方法合成2-丙烯酰胺-2-甲基丙磺酸(AMPS)、丙烯酰胺(Am)和N-乙烯基咪唑(Ⅵ)3种单体的共聚物P(AMPS-Am-Ⅵ),用于纳滤膜的表面涂覆改性,在膜表面引入亲水性三元共聚物涂层.对表面涂覆改性后纳滤膜的表面形貌、化学组成、亲/疏水性和荷电特征进行详细地测试与表征,考察表面涂覆改性条件对纳滤膜表面微结构和渗透分离性能的影响.研究结果表明,三元共聚物涂层的引入降低了膜表面粗糙度,提高了膜表面亲水性,并使膜表面更趋向于电中性,而纳滤膜的渗透和分离性能没有明显变化.动态抗污实验结果表明,三元共聚物涂层显著提高了纳滤膜的抗污染能力,物理清洗后通量恢复率可达87.6％.
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