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A Design of Composite Hollow Fiber Membranes with Tunable Performance and Reinforced Mechanical Strength

机译:具有可调性能和增强机械强度的复合中空纤维膜的设计

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摘要

A new design of hollow fiber membranes with high mechanical strength, great surface area per volume ratio and tunable filtration performance is presented. This newly developed hollow fiber membrane was produced by an intensified production process, in which the processes of thermally induced phase separation (TIPS), non-solvent induced phase separation (NIPS), and interfacial polymerization (IP) were combined. PVDF (polyvinylidene difluoride) hollow fiber membranes (produced by TIPS) were used as support substrates. Afterwards, PES (polyethersulfone) (made by NIPS) and PA (polyamide) layers (manufactured by IP) were coated one by one. The pure water permeability, molecular weight cut off (MWCO), salt rejection, tensile stress together with surface and cross-sectional morphology indicate that the properties of the hollow fiber membranes can be easily adjusted from microfiltration-like to nanofiltration-like membranes only by varying the presence of the IP step and the concentration in the PES layer in the production system. (c) 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 41247.
机译:提出了一种新的中空纤维膜设计,该膜具有较高的机械强度,较大的单位体积比表面积和可调节的过滤性能。这种新开发的中空纤维膜是通过强化生产工艺生产的,该工艺将热诱导相分离(TIPS),非溶剂诱导相分离(NIPS)和界面聚合(IP)的过程结合在一起。将PVDF(聚偏二氟乙烯)中空纤维膜(由TIPS生产)用作支撑衬底。然后,一层一层地涂覆PES(聚醚砜)(由NIPS制造)和PA(聚酰胺)层(由IP制造)。纯净的水渗透性,截留分子量(MWCO),脱盐率,拉伸应力以及表面和横截面形态表明,仅通过以下方法,就可以轻松地将中空纤维膜的性能从微滤样调整为纳滤膜。改变生产系统中IP步骤的存在和PES层中的浓度。 (c)2014 Wiley Periodicals,Inc. J. Appl。 Polym。科学2015,132,41247。

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