摘要
以浓硫酸为聚醚砜(PES)的溶剂和磺化剂,制备磺化聚醚砜(SPES).选取磺化度(DS)为14%的SPES溶液,制备PES-SPES共混膜,考察了共混膜的脱盐效果和抗污染性能.结果表明,共混膜的基质材料中,随SPES.PES的质量比的增加,共混膜表面膜孔径增大,断面结构由指状孔向海绵状孔转化,共混膜水通量增加,截留率降低.,当SPES的DS为14%、SPES、PES的质量比0.75时,制得共混膜水通量为253.7L/(m^2·h),对PEG6000、PEG10000和PEG20000的截留率分别为56.8%.74.5%和90.6%;共混膜在相同测试条件下对Na2SO4截留效果大于NaCL经亲水改性的PES-SPES共混膜亲水性提高,抗污染性能明显增强.
Sulfonated polyether sulfone (SPES) was prepared with concentrated sulfuric acid as solvent and sulfonating agent. SPES solution with sulfonation degree (DS) of 14% were blended to prepare PES/SPES blended membranes. The desalination effect and anti-pollution of the blended membranes was investigated. The results showed that, in the matrix material of the blended membranes, with the increase of mass ratio of SPES and PES, the pore size of membrane surface increased, the finger-like structure of membrane section tended to change into sponge-like structure, the pure water flux increased and rejection rate decreased. With 14% DS and 0.75 of SPES/PES mass ratio, the pure water flux of PES/SPES membrane was 253.7 L/(m2,h), and the rejection rate for PEG6000, PEG 10000 and PEG20000 were 56.8%, 74.5% and 90.6%, respectively. The rejection rate ofNa2SO4 was greater than that ofNaCl. The anti-pollution performance of PES/SPES blended membranes was significantly enhanced after hydrophilic modification.
作者
赵津礼
王建友
张玉忠
ZHAO Jinli;WANG Jianyou;ZHANG Yuzhong(College of Environmental Science and Engineering,Nankai University,300350;School of Material Science and Engineering,Tianjin Polytechnic University,300387: Tianjin,China)
出处
《水处理技术》
CAS
CSCD
北大核心
2019年第6期38-42,47,共6页
Technology of Water Treatment
基金
国家重点研发计划(2016YFC0400707,2017YFC0404003)
南开大学基本科研项目(20180017)
天津市生态环境治理科技重大专项(18ZXSZSF00050)
省部共建分离膜与膜过程国家重点实验室开放基金(M2-201703)
关键词
聚醚砜
磺化聚醚砜溶液
共混膜
脱盐
抗污染
polyethersulfone
sulfonated polyethersulfone solution
blended membrane
desalination
anti-pollution
