聚四氟乙烯包缠中空纤维膜的制备及其亲水改性

Preparation and hydrophilic modification of polytetrafluoroethylene hollow fiber membrane

针对聚四氟乙烯(PTFE)中空纤维膜制备过程中孔径与孔隙率调控之间存在的矛盾,通过包缠法在中空纤维膜表面包缠平板膜,构建不对称微孔结构,制备孔径小、孔隙率高的PTFE包缠中空纤维膜。此外,提出"藤缠树"亲水改性方法,在疏水PTFE包缠中空纤维膜的原纤及节点表面稳定地包覆亲水剂,赋予其优异的表面润湿性能,拓展其在水处理中的应用。

A novel wrapping method was put forward to deal with contradiction between the pore size and porosity control in the manufacturing of a polytetrafluoroethylene （PTFE） hollow fiber membrane, which can be applied to fabricate the asymmetric structures and PTFE wrapped hollow fiber membrane with small pore size and high porosity. In addition, physical entanglement of hydrophilic agent on the surface of fibrils and nodes was utilized to achieve surface hydrophilic modification, leading to excellent wettability and wider application in water treatment.