中文摘要：

采用聚间苯二甲酰间苯二胺（PMIA）与羟基化多壁碳纳米管（O-MWCNTs）共混,通过干-湿相转化法制备中空纤维纳滤膜,研究了不同含量的羟基化多壁碳纳米管对O-MWCNTs/PMIA中空纤维纳滤膜结构与性能的影响。结果表明随着O-MWCNTs的含量的增加,膜内部指状孔明显增加,海绵状过渡层减少;O-MWCNTs/PMIA中空纤维纳滤膜的亲水性与表面电负性明显加强;共混纳滤膜的水通量随O-MWCNTs的增加而增加,对无机盐的截留出现先增加后减小的趋势。在渗透压力为1.0 MPa下,O-MWCNTs含量为0.1%时,O-MWCNTs/PMIA中空纤维纳滤膜的纯水通量为55.1 L/（m~2·h）,对硫酸钠的截留率可达到78.5%,对甲基橙、亚甲基蓝、酸性红、直接红13的去除率可达到90.5%、94.4%、99.5%、99.9%。

英文摘要：

Hydroxylated multi-walled carbon nanombes （O-MWCNTs） were mixed with Poly （m-phenyleneisophalamide） （PMIA） to fabricate hollow fiber nanofiltration membrane by dry-wet phase inversion method. The effects of O-MW（2NTs with different content on the structure and properties of the membrane were investigated. The results showed that, Finger-like pores increased evidently and Sponge like transition layer decreased with the increase of O-MWCNTsdosage. The hydrophilic of membrane increased with the increase of O-MWCNTs, as well as surface potential. The increased content of O-MWCNTs improved the water flux ofnanofiltration membrane, but the rejection of inorganic salts increased first and then decreased. With 0.1% O-MWCNTs added, the pure water permeate flux was 55.1 L/（m2.h） and rejection rate of Na2SO4 was up to 78.5%, under the operation pressure of 1.0 MPa.The removal rate of methyl orange, methylene blue, Congo red and direct red 13 could reach 90.5%, 94.4%, 99.8% and 99.9% respectively.