用于水处理的超亲水性聚砜纳米纤维膜的制备
Preparation of super-hydrophilic polyphenylsulfone nanofiber membranes for water treatment.
作者信息
Wang Yan, Górecki Radoslaw Pawel, Stamate Eugen, Norrman Kion, Aili David, Zuo Min, Guo Weihong, Hélix-Nielsen Claus, Zhang Wenjing
机构信息
Polymer Processing Laboratory, Key Laboratory for Preparation and Application of Ultrafine Materials of Ministry of Education, School of Material Science and Engineering, East China University of Science and Technology Shanghai People's Republic of China.
Department of Chemical Engineering, Huaihai Institute of Technology Lianyungang People's Republic of China.
出版信息
RSC Adv. 2019 Jan 2;9(1):278-286. doi: 10.1039/c8ra06493h. eCollection 2018 Dec 19.
Electrospun nanofiber membrane-supported thin film composite (TFC) membranes exhibit great potential in water purification. In this work, electrospun polyphenylsulfone (PPSU) nanofiber membranes were prepared and modified by heat and plasma treatments. The resulting membranes were used as support layers for biomimetic TFC-based forward osmosis membranes. Thermal treatment transformed a loose non-woven nanofiber structure into a robust interconnected 3-dimensional PPSU network displaying a 930% increase in elastic modulus, 853% increase in maximum stress, and two-fold increase in breaking strain. Superior hydrophilicity of PPSU nanofiber membranes was achieved by low-pressure plasma treatment, changing the contact angle from 137° to 0°. The fabricated exemplary TFC-based forward osmosis membrane showed an osmotic water flux > 14 L m h with a very low reserve salt flux ( / = 0.08 g L) demonstrating the potential for making high quality membranes for water treatment using PPSU-based support layers for TFC membranes.
电纺纳米纤维膜支撑的薄膜复合（TFC）膜在水净化方面具有巨大潜力。在这项工作中，制备了电纺聚苯砜（PPSU）纳米纤维膜，并通过加热和等离子体处理对其进行改性。所得膜用作基于仿生TFC的正向渗透膜的支撑层。热处理将松散的非织造纳米纤维结构转变为坚固的相互连接的三维PPSU网络，其弹性模量增加了930%，最大应力增加了853%，断裂应变增加了两倍。通过低压等离子体处理实现了PPSU纳米纤维膜的优异亲水性，接触角从137°变为0°。所制备的示例性基于TFC的正向渗透膜显示出渗透水通量>14 L m⁻² h⁻¹，且截留盐通量极低（/ = 0.08 g L⁻¹），这表明使用基于PPSU的TFC膜支撑层制备用于水处理的高质量膜具有潜力。
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