Surface segregation-intensified physical vapor deposition of TiO2 on polyether sulfone membranes for enhanced antifouling performances

IF 9.6 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Rare Metals Pub Date : 2025-01-30 DOI:10.1007/s12598-024-03122-9

Hong-Jian Wang, Hai-Xia Wang, Yang-Yang Song, Ke-Wei Qiu, Yu-Zhu Liu, Guo-Cheng Yao, Wen-Liang Li, Ya-Nan Liu, Fu-Sheng Pan

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引用次数: 0

Abstract

Coating techniques are efficient routes to modify surface property of composite membranes for enhanced membrane separations. However, it remains challenge to deposit continuous inorganic layers on hollow fiber substrates. This study combines surface segregation with physical vapor deposition (PVD) to construct intensified TiO₂ layers on polyether sulfone (PES) hollow fiber substrates. During membrane fabrication, polyethylene-polypropylene glycol (F127) is used as surface segregation agent in casting solution, which enables PES hollow fibers with abundant hydroxy groups, thus improving the compatibility between PES and vaporized TiO₂. The obtained PES/F127@TiO₂ membranes exhibit tight TiO₂ layers with tunable thickness, high mechanical strength, narrowed pore size and enhanced hydrophilicity. Moreover, the optimized PES/F127@TiO₂ membranes show competitive antifouling performances in water treatment, with a water permeability up to 97 L·m⁻²·h⁻¹·bar⁻¹ and bovine serum albumin (BSA) rejection of ~ 99%. This work is expected to provide a material design idea to deposit functional layers on polymers for fortified performances.

Graphical abstract

This study integrated surface segregation with physical vapor deposition (PVD) to deposit TiO2 layers on polyether sulfone (PES) substrates for enhanced antifouling performances.

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二氧化钛在聚醚砜膜上的表面分离强化物理气相沉积以增强防污性能

涂层技术是改善复合膜表面性能以提高膜分离性能的有效途径。然而，在中空纤维基底上沉积连续的无机层仍然是一个挑战。本研究将表面偏析与物理气相沉积（PVD）相结合，在聚醚砜（PES）中空纤维基底上构建强化TiO2层。在制膜过程中，在铸膜液中加入聚乙烯-聚丙烯乙二醇（F127）作为表面隔离剂，使PES中空纤维具有丰富的羟基，从而提高PES与汽化TiO2的相容性。所得的PES/F127@TiO2膜具有致密的TiO2层，厚度可调，机械强度高，孔径缩小，亲水性增强。此外，优化后的PES/F127@TiO2膜在水处理中表现出良好的防污性能，透水性高达97 L·m−2·h−1·bar−1，牛血清白蛋白（BSA）的去除率为~ 99%。这项工作有望为在聚合物上沉积功能层以增强性能提供一种材料设计思路。图：本研究将表面偏析与物理气相沉积（PVD）相结合，在聚醚砜（PES）衬底上沉积TiO2层，以增强其防污性能。

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来源期刊

Rare Metals 工程技术-材料科学：综合

CiteScore

12.10

自引率

12.50%

发文量

2919

审稿时长

2.7 months

期刊介绍： Rare Metals is a monthly peer-reviewed journal published by the Nonferrous Metals Society of China. It serves as a platform for engineers and scientists to communicate and disseminate original research articles in the field of rare metals. The journal focuses on a wide range of topics including metallurgy, processing, and determination of rare metals. Additionally, it showcases the application of rare metals in advanced materials such as superconductors, semiconductors, composites, and ceramics.