摘要
采用干-湿相转化法制备PVDF/PVC共混中空纤维膜,通过对水通量、孔隙率、平均孔径的测试及扫描电镜的微观分析,讨论了凝胶浴组成、温度和芯液浓度对PVDF/PVC中空纤维膜性能及结构的影响,并进行了详细的理论分析.试验结果表明,提高凝胶浴温度和浓度有利于增加膜的水通量,但对孔隙率有一定的影响,在芯液中加入一些溶剂是提高通量的一种手段,但加入量要合理.
PVDF/PVC blend membranes were prepared by dry - wet spinning process. The effects of different solvent concentrations in coagulation bath, coagulation temperatures and different solvent concentration in core solution on PVDF/PVC blend membranes performance were studied and discussed in this paper. The water flux, porosity,average pore size and membrane structure by SEM were investigated and analyzed. The results showed that increase in the coagulation temperature and solvent concentration tend to increase the water flux, but had some influence of porosity. In order to increase the water flux of membrane It was a good measure to add some solvent into core solution,but the dosed solvent added into the core solution should be proper.
出处
《膜科学与技术》
CAS
CSCD
北大核心
2008年第2期38-43,共6页
Membrane Science and Technology
基金
上海高校选拔培养优秀青年教师科研专项基金资助项目(677171001)
关键词
PVDF
PVC
中空纤维膜
凝胶条件
凝胶浴
PVDF
PVC
hollow fiber membrane
coagulation condition
coagulation bath
