Gruenig, Lara; Handge, Ulrich A.; Koll, Joachim; Gronwald, Oliver; Weber, Martin; Hankiewicz, Birgit; Scharnagl, Nico; Abetz, Volker published an article in 2020, the title of the article was Hydrophilic dual layer hollow fiber membranes for ultrafiltration.SDS of cas: 80-07-9 And the article contains the following content:
In this study, a triblock copolymer was used as additive to fabricate new dual layer hollow fiber membranes with a hydrophilic active inner surface in order to improve their fouling resistance. The polymeric components of the solutions for membrane fabrication were poly(ether sulfone), poly(N-vinyl pyrrolidone), and the triblock copolymer. The additive consists of three blocks: a middle hydrophobic poly(ether sulfone) block and two outer hydrophilic alkyl poly(ethylene glycol) blocks. By varying the additive concentration in the solutions, it was possible to fabricate dual layer hollow fiber membranes that are characterized by a hydrophilic inner layer, a pure water permeance of over 1800 L/(m2 bar h) and a mol. weight cut-off of 100 kDa similar to com. membranes. Contact angle and composition determination by XPS measurements revealed the hydrophilic character of the membranes, which improved with increasing additive concentration Rheol., dynamic light scattering, transmission, and cloud point experiments elucidated the mol. interaction, precipitation, and spinning behavior of the solutions The low-mol. weight additive reduces the solution viscosity and thus the average relaxation time. Furthermore, phase separation occurred at a lower non-solvent concentration and the precipitation time increased with increasing additive content. The chosen process parameters as well as the additive solutions provide an easy and inexpensive way to create an antifouling protection layer in situ with established recipes of poly(ether sulfone) hollow fiber membranes. The experimental process involved the reaction of 4,4′-Sulfonylbis(chlorobenzene)(cas: 80-07-9).SDS of cas: 80-07-9
The Article related to polyether sulfone hollow fiber membrane ultrafiltration viscoelastic property, fouling, hollow fiber membranes, hydrophilicity, poly(ether sulfone), triblock copolymers, Plastics Fabrication and Uses: Plastic Product Uses and other aspects.SDS of cas: 80-07-9
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