仿鱼鳞PDA纳米片复合滤膜的制备及油水分离性能  

Preparation and oil-water separation performance of fish scale-likePDA nanosheet composite filter membrane

作　　者：林姣盼 高军凯 彭慧婷 施骞 韩志 陈妍 LIN Jiaopan;GAO Junkai;PENG Huiting;SHI Qian;HAN Zhi;CHEN Yan(School of Naval Architecture and Maritime,Zhejiang Ocean University,Zhoushan 316022,Zhejiang,China;School of Energy and Power Engineering,Jiangsu University,Zhenjiang 212000,Jiangsu,China)

机构地区：[1]浙江海洋大学船舶与海运学院,浙江舟山316022 [2]江苏大学能源与动力工程学院,江苏镇江212000

出　　处：《精细化工》2023年第12期2630-2640,共11页Fine Chemicals

基　　金：国家自然科学基金项目(51606168);教指委高等学校能源动力类教学研究与实践项目(NDJZW2021Z-45);江苏大学高级人才科研启动基金项目(21JDG048);江苏大学高等教育教改研究课题(2021JGZZ011)。

摘　　要：以聚多巴胺(PDA)为原料、Mg(OH)_(2)为模板剂,采用液相沉积法原位包覆Mg(OH)_(2)纳米片制备了PDA纳米片,再以疏水棉布为基底,PDA纳米片为覆盖层制备了PDA纳米片复合滤膜(简称复合滤膜)。通过SEM、TEM、BET、FTIR、XPS、XRD和接触角测量仪对复合滤膜进行了结构表征,同时测定了复合滤膜对油水混合物和乳化油的分离性能、循环使用性能和抗污染性能。结果表明,PDA纳米片的引入显著地增加了复合滤膜的表面粗糙度,在自重作用下复合滤膜对油水混合物和乳化油(均以环己烷为油相)的渗透通量分别为2866.24和1015.13 L/(m^(2)·h),分离效率达99.5%,且复合滤膜在重复使用10次后,其对乳化油的渗透通量为798.11 L/(m^(2)·h),分离效率达98.1%。此外,PDA纳米片还具有普适性,能覆盖在不同基底上进行乳化油分离,具有良好的应用前景。Polydopamine(PDA)nanosheets were prepared from in-situ liquid phase deposition of PDA onto Mg(OH)2 nanosheets.PDA nanosheets composite filter membrane(referred to as composite filter membrane)was then synthesized via coating the PDA nanosheets onto hydrophobic cotton cloth,characterized by SEM,TEM,BET,FTIR,XPS,XRD and contact angle tester,and evaluated on its separation performance for oil-water mixture and emulsified oil,recycling performance as well as anti-pollution performance.The results showed that the introduction of PDA nanosheets significantly increased the surface roughness of the composite filter membrane.The permeation fluxes of the composite filter membrane for oil-water mixture and emulsified oil driving by self-gravity(both with cyclohexane as oil phase)were 2866.24 and 1015.13 L/(m^(2)·h),respectively,with separation efficiency of 99.5%.The permeation flux of the composite filter membrane,which was recycled 10 times,for emulsified oil was 798.11 L/(m^(2)·h)and the separation efficiency was 98.1%.In addition,PDA nanosheets also exhibited universality and could coat onto different substrates for emulsified oil separation,showing good application prospects.

关 键 词：原位包覆 多功能 聚多巴胺纳米片 自重分离 功能材料 

分 类 号：X703[环境科学与工程—环境工程] TQ051.893[化学工程]