采用界面聚合的方法制备抗污染的氧化石墨烯(GO)改性聚酰胺(PA)复合纳滤膜(GO-PA),并对其在脱除染料中的应用进行研究.以哌嗪(PIP)、氧化石墨烯(GO)混合分散液作为水相,均苯三甲酰氯(TMC)的正己烷溶液作为有机相,在聚醚砜(PES)超滤膜支撑层上采用界面聚合的方法制备复合纳滤膜(GO-PA).通过表征,确认膜表面呈荷负电性,平均孔径0.4nm左右,截留相对分子量774左右.在0.6MPa的操作压力下,膜的纯水通量可达87.6 L/(m2·h),对无机盐的截留率为:Na2SO4 (98.2％)＞MgSO4 (96.5％)＞NaCl (56.8％)＞MgCl2 (50.5％).复合膜的抗污染性实验结果表明,GO-PA膜的抗污染性能明显提高.最后,通过考察复合膜对酸性红、直接黑、直接黄三种染料的去除效果.结果表明,所制备的GO-PA复合膜对3种染料的截留率达到98％以上.
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