为了改善膜的分离性能,采用氧化石墨烯(GO)与纳米二氧化钛(nano-TiO2)对聚醚砜(PES)超滤膜进行共混改性,将GO和nano-TiO2单独或按比例添加到PES铸膜液中,分别考察了不同共混改性超滤膜分离性能和抗污染性能,并通过热失重分析仪等表征手段对膜进行了分析,利用纯水和模拟污染物进行了通量测试.试验结果表明:共混改性后超滤膜热稳定性增强,指状孔道变大,上表面粗糙度减小.通过对比分析,可知GO和nano-TiO2共同共混改性的超滤膜(0.8 ％GO+0.2％nano-TiO2)性能最优,纯水通量可达260 L/(m2·h),相较于纯PES膜,通量增加了52.1％,静态接触角可达54.7°,BSA和SA模拟污染物过滤180 min后,膜的稳定通量分别保持在67.8和68.0 L/(m2·h)左右,截留率均可达99％以上.
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