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.

在这项工作中，通过热键合相分离（TIPS）方法制备的超高分子量聚乙烯（UHMWPE）微滤中空纤维膜通过化学键合亲水性二氧化硅（SiO ₂）纳米颗粒附着在表面上，以提高防污性能。一系列测试技术包括衰减全反射Flourier变换红外光谱（ATR-FTIR），X射线光电子能谱（XPS），场发射扫描电子显微镜（FE-SEM），水接触角，机械测试，过滤和抗进行结垢性能以讨论不同改性条件对膜性能的影响。当乙烯基三甲氧基硅烷（VTMS）的浓度为13％，水解产物的pH值为4，水解反应时间为6 h时，制得的中空纤维膜表现出极好的性能。特别是，改性膜的亲水性得到有效改善，从而提高了膜的防污性能。