改性凹凸棒石/PVP/PVDF超滤膜制备及性能测试  

Preparation of Modified Attapulgite/PVP/PVDF Ultrafiltration Membrane and Its Performance Testing

作　　者：李鑫清 房平 宋经华 杜明山 张怡萱 LI Xin-qing;FANG Ping;SONG Jing-hua;DU Ming-shan;ZHANG Yi-xuan(School of Urban Planning and Municipal Engineering,Xi’an Polytechnic University ZHANG Yi‑xuan,Xi’an 710000,China)

机构地区：[1]西安工程大学城市规划与市政工程学院,陕西西安710000

出　　处：《中国给水排水》2024年第13期55-60,共6页China Water & Wastewater

基　　金：西安市科技计划项目(23GXFW0023)。

摘　　要：近年来,聚偏氟乙烯(PVDF)膜由于其多项优异性能被广泛应用于水处理领域。但PVDF膜的疏水性导致其在水处理过程中极易受到污染,影响水处理效果。基于此,使用凹凸棒石(ATP)为改性剂,通过NIPS法制膜,并完成聚多巴胺(PDA)的附着处理。结果表明,相较于纯膜,改性膜水通量提升68.35%,对牛血清白蛋白(BSA)的截留率提升43.48%,通量恢复率最高提升44.6%,接触角下降32.05%,这些改变可成功提升膜的使用寿命,使膜的适用范围变得更加宽广。In recent years,the polyvinylidene fluoride(PVDF) membrane has been widely utilized in the field of water treatment due to its multiple excellent properties.However,the hydrophobic nature of the PVDF membrane makes it susceptible to fouling during the water treatment process,thereby impacting its overall effectiveness in water treatment.In this study,attapulgite(ATP) was utilized as a modifier,and the membrane was coated with polydopamine(PDA) using the NIPS method.Compared to the pure membrane,the modified membrane demonstrated a 68.35% increase in water flux,a 43.48% improvement in bovine serum albumin(BSA) retention rate,a 44.6% highest enhancement in flux recovery rate,and a 32.05% decrease in contact angle.These modifications effectively enhanced the membrane's service life,thereby expanding its range of applications.

关 键 词：聚偏氟乙烯 凹凸棒石 聚多巴胺 超滤膜 抗污染性能 

分 类 号：TU992[建筑科学—市政工程]