Preparation of Hydrophilic UHMWPE Hollow Fiber Membranes by Chemically Bounding Silica Nanoparticles
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ARTICLE
POLYMER SCIENCE
https://doi.org/10.1007/s10118-021-2507-1 Chinese J. Polym. Sci.
Preparation of Hydrophilic UHMWPE Hollow Fiber Membranes by Chemically Bounding Silica Nanoparticles Lian-Lian Fana, Jia-You Quana, Hao Zhangb, Jun-Rong Yua*, Zu-Ming Hua, and Yan Wanga a Shanghai Collaborative Innovation Center for High Performance Fiber Composites, College of Materials Science and Engineering, Donghua University, Shanghai
201620, China b Sinochem International Corporation, Shanghai 200126, China
Abstract In this work, ultra-high molecular weight polyethylene (UHMWPE) microfiltration hollow fiber membranes prepared via the thermally induced phase separation (TIPS) method were modified by chemically bounding hydrophilic silica (SiO2) nanoparticles onto the surface to improve anti-fouling performance. A range of testing techniques including attenuated total reflection Flourier transformed infrared spectroscopy (ATR-FTIR), X-ray photoelectron spectroscopy (XPS), field emission scanning electron microscopy (FE-SEM), water contact angle, mechanical test, filtration and anti-fouling performance were carried out to discuss the influence of different modification conditions on the properties of the membranes. The prepared hollow fiber membranes display the significantly excellent performance when the vinyl trimethoxy silane (VTMS) concentration was 13%, the pH value of the hydrolyzate was 4 and the hydrolysis reaction time was 6 h. In particular, the hydrophilicity of modified membranes was improved effectively, resulting in the enhancement of membrane anti-fouling properties. The results of this work can be consulted for improving the anti-fouling performance of the UHMWPE microfiltration hollow fiber membrane applied in the field of water purification. Keywords Hollow fiber membrane; Hydrophilic; Anti-fouling; Silica (SiO2) nanoparticles; Water purification Citation: Fan, L. L.; Quan, J. Y.; Zhang, H.; Yu, J. R.; Hu, Z. M.; Wang, Y. Preparation of hydrophilic UHMWPE hollow fiber membranes by chemically bounding silica nanoparticles. Chinese J. Polym. Sci. https://doi.org/10.1007/s10118-021-2507-1
INTRODUCTION Microporous polymeric membranes have been prepared by several methods, including melt stretching, phase transition and phase separation of a variety of polymers.[1,2] Generally, there are two ways to prepare polymeric membranes by phase separation: nonsolvent induced phase separation (NIPS) and thermally induced phase separation (TIPS).[2,3] In the NIPS process, phase separation occurs during the exchange of a nonsolvent for the solvent from polymer solution, while phase separation is caused by cooling the polymer solution in the TIPS process.[3,4] UHMWPE microporous membranes are usually prepared by TIPS method, which is perhaps the most versatile and simplest technique for the preparation of microporous membranes.[5] Generally, TIPS method can provide membranes with high porosity and mechanical strength as the microstructure of the membranes can be easily controlled during TIPS process, whic
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