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%。
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.
作者
杨彬
张少峰
赵长伟
杨梅
俞灵
YANG Bin ZHANG Shaofeng ZHAO Changwei YANG Mei YU Ling(School of Chemical Engineering, Hebei University of Technology, Tionjin 300130, China State Key Laboratory of Environmentd Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China)
出处
《水处理技术》
CAS
CSCD
北大核心
2017年第8期50-54,62,共6页
Technology of Water Treatment
基金
国家自然科学基金(21476248)
十二五国家科技支撑计划项目(2012BAJ25B02
2012BAJ25B06)
