Fabrication of PVDF-HF membrane for bubble-free gas transfer via wet phase inversion,Journal of Applied Polymer Science

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Fabrication of PVDF-HF membrane for bubble-free gas transfer via wet phase inversion
Journal of Applied Polymer Science ( IF 2.7 ) Pub Date : 2021-07-17 , DOI: 10.1002/app.51405
Yunus Aksoy ₁ , Halil Hasar ₁

Affiliation

In this study, the characterization of gas permeable hollow fiber membranes fabricated from PVDF polymer by using wet phase inversion method was investigated. During preparation of dope solution for fabrication process, after PVDF polymer was resolved in N-methyl-2-pyrrolidone of 70%–80%, two additives of 5 wt% poly(vinylpyrolidone) K10 and propionic acid (PA) were tried by adding into dope solutions to determine the effect of additives on membrane characterization. SEM images showed that when the PVP K10 additive was used at high PVDF ratio of 25 wt%, a dense structure formed in the inner section and the large finger-like macro-voids reduced through the cross-section of each fiber. FTIR results indicated that both additives were not maintained in the fabricated membranes due to the passage into the water during phase inversion. However, it was realized that using of PVP K10 and PA in the membrane fabrication adversely affected contact angle and gas transfer performance.

中文翻译：

PVDF-HF膜通过湿相转化实现无气泡气体传输

在这项研究中，研究了使用湿相转化法由 PVDF 聚合物制成的透气中空纤维膜的表征。在制备工艺用原液溶液时，将 PVDF 聚合物溶解在 70%–80% 的 N-甲基-2-吡咯烷酮中后，尝试加入 5 wt% 聚乙烯吡咯烷酮 K10 和丙酸 (PA) 两种添加剂到原液中以确定添加剂对膜特性的影响。SEM 图像显示，当 PVP K10 添加剂以 25 wt% 的高 PVDF 比例使用时，在内部形成的致密结构和通过每根纤维横截面的大指状宏观空隙减少。FTIR 结果表明，由于在相转化过程中会进入水中，两种添加剂都没有保留在制造的膜中。然而，

更新日期：2021-09-09

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