摘要
以聚砜(PSF)为溶质,N-甲基吡咯烷酮(NMP)为溶剂,聚乙二醇(PEG)为添加剂制备铸膜液。一定温度下,通过调节PSF含量、PEG的相对分子质量和添加量,研究不同的铸膜液组成对基膜水通量、截留率、水接触角、耐压密性和膜截面结构的影响。结果表明,基膜的水通量随PSF含量的增加而降低,截留率升高但幅度较小,耐压密性增强。同一相对分子质量的PEG随着PEG含量的增加,通量先增加后减小,截留率变化不大,耐压密性先减小后增大但最终耐压密性低于初始耐压密性。同一含量的PEG随着其相对分子质量的增加,通量呈先增加后减小趋势,截留率变化不大,耐压密性呈减小趋势。综合考虑,选择PSF、NMP的质量分数分别为21%、71%,质量分数8%的PEG-2000作添加剂改性PSF基膜为好。
Polysulfone （PSF）, N-methyl pyrrolidone （NMP） and polyethylene glycol （PEG） were used as solute, solvent and additive respectively to prepare the casting solution. Under a certain temperature, studying on the effect of different casting solution composition on water flux, rejection rate,water contact angle, compression resistance and cross sectionstructure of substrate membrane by adjusting the polysulfone content, relative molecular mass and additive amount of PEG. Results showed that, with the increasing ofpolysulfone content, the water flux of substrate membrane decreased, rejection rate increased by less, compression resistance enhanced. With the increasing of PEG content under a same relative molecular mass of PEG, the flux increased first and then decreased, the rejection rate changed little, compression resistance decreased first and then increased but the final compression resistance was lower than the initial. With the increasing of PEG relative molecular mass under the same content of PEG,the flux increased first and then decreased, the rejection rate changed little,compression resistance showed a decreasing trend. By overall consideration, when PSF, NMP and PEG-2000 with mass fraction of 21%, 71% and 8% respectively were used as additive to modify the PSF substrate membrane, the performance ofPSF substrate membrane reached the optimal condition.
作者
谢颂京
孔媛媛
皇甫风云
王兵
XIE Songjing KONG Yuanyuan HUANGFU Fengyun WANG Bing(School of Material Science and Engineering, Tianjin Polytechnic University, 30038 Tianjin Industry University For The Textile Auxiliaries Co., Ltd, 300160： Tianjin, China)
出处
《水处理技术》
CAS
CSCD
北大核心
2017年第2期71-74,89,共5页
Technology of Water Treatment
基金
天津市自然科学基金重点项目(13JCQNJC02600)
关键词
PEG添加剂
聚砜
反渗透膜
基膜
PEG additive
polysulfone
reverse osmosis membrane
substrate membrane
