Development of Polysulfone Hollow Fiber Porous Supports for High Flux Composite Membranes: Air Plasma and Piranha Etching

Borisov, I.; Ovcharova, A.; Bakhtin, D.; Bazhenov, S.; Volkov, A.; Ibragimov, R.; Gallyamov, R.; Bondarenko, G.; Mozhchil, R.; Bildyukevich, A.; Volkov, V.

Авторы: Ilya Borisov, Anna Ovcharova, Danila Bakhtin, Stepan Bazhenov, Alexey Volkov, Rustem Ibragimov, Rustem Gallyamov, Galina Bondarenko, Rais Mozhchil, Alexandr Bildyukevich, Vladimir Volkov
Журнал: Fibers
Том: 5
Номер: 1
Год издания: 2017
Первая страница: 6
DOI: 10.3390/fib5010006
Аннотация: Abstract: For the development of high efﬁciency porous supports for composite membrane preparation, polysulfone (PSf) hollow ﬁber membranes (outer diameter 1.57 mm, inner diameter 1.12 mm) were modiﬁed by air plasma using the low temperature plasma treatment pilot plant which is easily scalable to industrial level and the Piranha etch (H2O2 + H2SO4). Chemical and plasma modiﬁcation affected only surface layers and did not cause PSf chemical structure change. The modiﬁcations led to surface roughness decrease, which is of great importance for further thin ﬁlm composite (TFC) membranes fabrication by dense selective layer coating, and also reduced water and ethylene glycol contact angle values for modiﬁed hollow ﬁbers surface. Furthermore, the membranes surface energy increased two-fold. The Piranha mixture chemical modiﬁcation did not change the membranes average pore size and gas permeance values, while air plasma treatment increased pore size 1.5-fold and also 2 order enhanced membranes surface porosity. Since membranes surface porosity increased due to air plasma treatment the modiﬁed membranes were used as efﬁcient supports for preparation of high permeance TFC membranes by using poly[1-(trimethylsilyl)-1-propyne] as an example for selective layer fabrication.
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Development of Polysulfone Hollow Fiber Porous Supports for High Flux Composite Membranes: Air Plasma and Piranha Etchingстатья

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