摘要
利用水热合成法将TiO_(2)纳米颗粒(TiO_(2)NP)转化为TiO_(2)纳米线(TiO_(2)NW),然后通过自组装法将其负载于反渗透膜(TFC)表面制备了TFC-TiO_(2)NW膜和TFC-TiO_(2)NP膜,以提高反渗透膜的耐污性,研究纳米TiO_(2)的形态对膜性能的影响。结果表明,相对于TFC和TFC-TiO_(2)NP膜,TFC-TiO_(2)NW膜的水通量和截盐率没有明显差异,证明将纳米TiO_(2)自组装于聚酰胺层表面未对膜性能带来负面影响。在2 MPa下运行3 h后,TFC-TiO_(2)NW膜表面TiO_(2)的留存率为96%,远高于TFC-TiO_(2)NP膜表面TiO_(2)的留存率(仅为68%),表明TiO_(2)NW具有优良的抗水力冲击能力。相较于TFC和TFC-TiO_(2)NP膜,TFC-TiO_(2)NW膜表面具有更强的润湿性和负电性,在牛血清蛋白和腐殖酸污染实验中,其通量恢复率分别为90.8%和81.1%,优于TFC及TFC-TiO_(2)NP膜,表明经TFC-TiO_(2)NW改性的反渗透膜具有优异的耐污性。
Using the hydrothermal synthesis method,TiO_(2)nanoparticles(TiO_(2)NP)were converted into TiO₂nanowires(TiO_(2)NW),which were then loaded onto the surface of thin-film composite(TFC)membranes via self-assembly to prepare TFC-TiO_(2)NW and TFC-TiO_(2)NP membranes,aiming to enhance the antifouling performance of TFC membranes.The influence of TiO_(2)morphology on membrane performance was investigated.The results showed that compared to TFC and TFC-TiO_(2)NP membranes,the water flux and salt rejection of TFC-TiO_(2)NW membranes exhibited no significant differences,indicating that the self-assembly of TiO_(2)on polyamide layers surface did not adversely affect membrane performance.After operating at 2 MPa for 3 hours,the retention rate of TiO_(2)on the surface of TFC-TiO_(2)NW membranes reached 96%,significantly higher than that of TFC-TiO_(2)NP membranes(only 68%),demonstrating the superior hydraulic impact resistance of TiO_(2)NW.Compared to TFC and TFC-TiO_(2)NP membranes,TFCTiO 2NW membranes exhibited stronger wettability and negative charge properties.In experiments involving bovine serum albumin and humic acid fouling,the flux recovery rates of TFC-TiO_(2)NW membranes were 90.8%and 81.1%,respectively,outperforming TFC and TFC-TiO_(2)NP membranes,indicating that the TFC-TiO_(2)NW membranes possessed excellent antifouling properties.
作者
赵雷
钱西江
王小娟
高学理
ZHAO Lei;QIAN Xijiang;WANG Xiaojuan;GAO Xueli(General Oil and Gas Gathering and Transporting Plant of Shengli Oilfield Company,SINOPEC,Dongying257099,China;Key Laboratory of Marine Chemistry Theory and Technology,Ministry of Education/College of Chemistry and Chemical Engineering,Ocean University of China,Qingdao266100,China)
出处
《水处理技术》
北大核心
2026年第3期63-68,共6页
Technology of Water Treatment
基金
山东省重点研发计划项目(2023CXGC010902)
国家自然科学基金项目(22278384)。
关键词
水热合成法
TiO_(2)纳米线
表面自组装
反渗透膜
耐污性
hydrothermal synthesis method
TiO_(2)nanowires
surface self-assembly
reverse osmosis membrane
antifouling property
