摘要
探究不同聚合物浓度、外凝固浴温度、内凝固浴组成对干-湿相转化法所制备的聚醚砜(PES)/聚甲基丙烯酸甲酯(PMMA)共混中空纤维超滤膜的结构和性能的影响。结果显示,PMMA的加入可以弱化PES膜的疏水性,提高膜的综合性能;总固含量增大,膜通量下降,截留率、拉伸强度增加;外凝固浴温度上升,膜通量增大,截留率、拉伸强度降低;随着芯液中N,N-二甲基乙酰胺(DMAc)含量增大,膜截面结构由对称双指状孔结构向单排指状孔结构转化,膜通量先减后增,截留率先升后降,拉伸强度呈增大趋势。
The effect of polymer concentration,coagulation bath temperature and bore liquid concentration on the performance of PES /PMMA blend hollow-fiber membranes,which were fabricated by phase inversion process were investigated. The addition of PMMA could improve hydrophilicity and overall performance of PES membrane. The results demonstrated that the pure water flux decreased gradually when the polymer concentration increased from 15% to 20%. However,the rejection and tensile strength increased. With the increase of coagulation bath temperature from 20 to 60 ℃,the pure water flux gradually increased,whereas both the rejection and tensile strength gradually decreased. In addition,with the increase of DMAc content in bore liquid,double finger-shaped voids on the cross-section of PES /PMMA hollow fiber membranes gradually transformed to a single row of finger voids. Meanwhile,the pure water flux first decreased and then increased. On the contrary,rejection decreased after slightly increasing,but tensile strength increased gradually.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2014年第11期11041-11045,共5页
Journal of Functional Materials
基金
福建省科技合作计划资助项目(2010I0012)
关键词
PES
PMMA
亲水改性
聚合物浓度
凝固浴
PES
PMMA
hydrophilic modification
polymer concentration
coagulation bath
