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利用二维编织技术将聚丙烯腈(PAN)纤维编织成中空编织管,以聚丙烯腈为成膜聚合物,以聚乙二醇为成孔剂,配制铸膜液,采用同心圆纺丝法制备同质编织管增强型聚丙烯腈中空纤维膜.研究结果表明,所得同质编织管增强型聚丙烯腈中空纤维膜的表面分离层具有类似于非对称膜的结构,铸膜液可渗入编织管纤维束中;随着编织管编织节距的增大,同质编织管增强型聚丙烯腈中空纤维膜表面分离层厚度减小,同时膜的平均孔径增大,膜的纯水通量随之增大;铸膜液渗入编织管纤维束的现象未影响膜的通透性能;编织管的断裂强度最大可达100 MPa以上.通过水浴振荡、超声波水浴振荡及等力拉伸3种方法测试了同质编织管增强型中空纤维膜和异质编织管增强型中空纤维膜中编织管与表面分离层之间的界面结合性能,结果表明前者的界面结合性能优于后者.
Polyacrylonitrile (PAN) fiber is braided into a hollow braided tube by a two-dimensional weaving technology, polyacrylonitrile is used as a film-forming polymer, and polyethylene glycol is used as a pore-forming agent to prepare a casting solution. The concentric spinning method Preparation of homogeneous braided tube reinforced polyacrylonitrile hollow fiber membrane.The results show that the resulting homogeneous braided tube enhanced polyacrylonitrile hollow fiber membrane surface separation layer has a structure similar to the asymmetric membrane, casting solution can penetrate the braid As the knitting pitch increases, the thickness of the separation layer on the surface of the PAN-reinforced hollow fiber membrane decreases and the average pore diameter of the membrane increases. The pure water flux of the membrane increases with The penetration of casting solution into the braided tube fiber bundles did not affect the permeability of the membrane.The maximum breaking strength of the braided tube was above 100 MPa.The test was conducted by three methods: water bath oscillation, ultrasonic water bath oscillation and isostatic stretching The interfacial bonding between the braided tube and the surface separation layer in the homogeneous braided tube reinforced hollow fiber membrane and the heterogeneous braided tube reinforced hollow fiber membrane shows that the former has better interfacial bonding properties than the latter.