以负载有四氧化三钴(Co3O4)的氧化石墨烯(GO)复合材料为添加剂,聚醚砜为膜材料,采用溶剂-非溶剂扩散诱导相分离转化法制备共混超滤膜.考察了添加剂含量对超滤膜的形态结构、亲水性、分离性能和耐污染性能的影响,以及改性膜催化清洗性能和发挥催化清洗功能的最佳条件.结果表明,Co3O4-GO复合材料的掺混使改性膜的亲水性、纯水通量和耐污染性能显著提高,对牛血清白蛋白(BSA)的截留率始终维持在94％以上,尤其当掺混质量分数为1.5％时,膜的纯水通量由101.1L/(m2·h)提高至347.2 L/(m2·h).催化清洗试验表明,超滤膜被垃圾渗滤液污染后的通量恢复率随着添加剂掺混量、单过硫酸氢盐(PMS)溶液浓度和浸泡时间的增加而提高,最佳催化清洗条件为:Co3O4-GO掺混质量分数为1.5％、PMS溶液浓度为5 mmol/L,浸泡时间为30 min.
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