通过层层(LBL)自组装技术对聚醚砜(PES)微滤膜进行改性.以29.2 g/L NaCl做为支撑电解质,在膜表面修饰一层聚二烯丙基二甲基氯化铵(PDADMAC)/聚苯乙烯磺酸钠(PSS)聚电解质膜.通过电位仪、水接触角分析仪、SEM、AFM、过滤评价装置等方法对膜进行测定分析.改性后膜的最外层为PSS,膜表面负电性增加,为-35.02 mV,水接触角值降低,由未改性膜的59.86°降低到37.99°;膜的表面形貌表征显示,改性后的微滤膜,表面更加平整,孔径尺寸分布更加均一;在过滤0.02 g/L腐殖酸时,试验120 min后,未改性膜的通量下降为39.4％,而改性后的膜通量下降为15.5％,膜的抗污染性提高.
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