摘要
采用干-湿法纺丝工艺制备了聚偏氟乙烯(PVDF)中空纤维膜,研究了高分子成孔剂、非溶剂、表面活性剂对成膜过程的影响。结果表明,以适当比例加入高分子成孔剂、非溶剂、表面活性剂,充分利用高分子成孔剂的分散与增稠作用、表面活性剂的界面润湿作用及非溶剂的降粘与微分相作用,使3类添加剂的致孔机理协同作用,从而可以纺制出孔径适当、高透水通量的PVDF中空纤维分离膜。无机盐的加入可显著提高PVDF中空纤维膜的水通量。
PVDF hollow fiber membrane was prepared bv dry-wet spinning technology. The effects of the additives, such as ,the pore-forming agent of polymer, the non-solvent,and the surface active agent, on the process of preparing membrane are studied. The results show that the pore-forming agent of polymer is able to increase the viscosity and emulsification of the solution ; the non-solvent of small molecular weight is able to decrease the viscosity of the solution and promote the micro-phase separation; and the small-molecular surface active agent is able to increase the stability of the solution. As a result, based on the combined additive, PVDF hollow fiber membrane with the proper pore size, high water flux can be prepared by adjusting the ratio of three kinds of additives.
出处
《天津工业大学学报》
CAS
2005年第5期1-4,共4页
Journal of Tiangong University
基金
863重大专项(2002AA601240)国家973项目(2003CB615700)
关键词
聚偏氟乙烯
中空纤维膜
纺丝
polyvinylidene fluoride
hollow fiber membrane
spinning
