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高通量聚醚砜纳滤膜的制备及对染料浓缩脱盐 被引量:7

Fabrication of high flux polyethersulfone nanofiltration membrane for dye concentration and desalination
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摘要 以聚醚砜(PES)为膜材料,以嵌段式聚醚Pluronic F127为添加剂,利用特制刮膜设备通过相转化法制备出高通量PES/Pluronic F127复合纳滤膜,并将其用于染料的浓缩脱盐。研究了添加剂含量、溶剂蒸发温度和蒸发时间对膜结构和膜性能的影响,考察了不同操作压力和操作温度下膜对染料的分离性能。扫描电镜(SEM)、接触角、孔隙率数据和蛋白吸附测试结果表明,Pluronic F127改善了膜孔结构,提高了孔隙率,并且显著提高了膜的抗污染性能。纯水通量、截留率以及膜表面孔径表征结果表明,当Pluronic F127含量为3%、溶剂蒸发温度为90℃、蒸发时间为18 s时,膜的分离性能最佳。在0.6 MPa下该膜对低分子量染料的截留率可达99.9%,且通量达到110.2 L·m-2·h-1,对NaCl的截留率仅为5.5%。在12 h的染料浓缩脱盐中,膜对染料的通量维持在较高水平且截留率始终保持在99%左右,具有良好的稳定性和抗污染性。 Black T is 99%, with a flux of 110.2 L·m^-2·h^-1, while the rejection for NaCl is only 5.5% at 0.6 MPa. The desalination and purification experiment exhibits that the rejection for the dye remains over 99% throughout the whole experiment, indicating that the PES NF membranes could be successfully applied in the dye purification and desalination process.
出处 《化工学报》 EI CAS CSCD 北大核心 2014年第10期3968-3975,共8页 CIESC Journal
基金 浙江省自然科学基金青年科学基金项目(LQ14B060001) 浙江省教育厅科研项目(Y201328359) 浙江省科技厅科研项目(2013C33019)~~
关键词 纳滤 脱盐 废水 抗污染 nanofiltration desalination waste water antifouling
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参考文献19

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二级参考文献77

共引文献508

同被引文献139

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