中国塑料2017，Vol.31Issue(7)：87-94,8.DOI:10.19491/j.issn.1001-9278.2017.07.015
混合稀释剂配比对热致相分离法聚偏氟乙烯中空纤维膜的影响
Effect of Diluent Mixing Ratio on PVDF Hollow Fiber Membrane Fabricated by Thermally Induced Phase Separation
周钱华 1沈海军1
作者信息
- 1. 浙江东洋环境工程有限公司,浙江湖州313000
- 折叠
摘要
Abstract
This paper reported an investigation on the effect of mixing ratio of γ-butyrolactone and dodecanolon the morphology and properties of poly(vinylidene fluoride) (PVDF) hollow fiber membranes fabricated by a thermally induced phase separation method on the basis of principle of polymer-solvent compatibility.It was found that a solid-liquid phase separation between PVDF and dilutes occurred with a decrease of temperature when the fraction of γ-butyrolactone in the mixing diluents exceeded 30 wt ％.A spherical structure was formed in the membrane,thus resulting in poor pore connectivity,low porosity,low pure water permeability and poor chemical resistance.When the fraction of γ-butyrolactone was less than 30 wt ％,a liquid-liquid phase separation took place with a decrease of temperature.In this case,a cross-linking bi-continuous structure was formed,which led to high tensile strength and good chemical resistance for the hollow fiber membranes.关键词
聚偏氟乙烯/热致相分离/混合稀释剂/中空纤维膜/拉伸强度/抗化学性能Key words
poly (vinylidene fluoride)/thermally induced phase separation/mixed diluent/hollow flber membrane/tensile strength/chemical resistance分类
化学化工引用本文复制引用
周钱华,沈海军..混合稀释剂配比对热致相分离法聚偏氟乙烯中空纤维膜的影响[J].中国塑料,2017,31(7):87-94,8.
