聚多巴胺改性粘土掺杂聚偏氟乙烯中空纤维杂化超滤膜的制备及性能研究  

Improved Performances of PVDF Hybrid Hollow Fiber Ultrafiltration Membrane with Polydopamine Modified Clay

作　　者：刘彩锋 杨建华 王宁[2] Liu Caifeng;Yang Jianhua;Wang Ning(College of Chemistry and Chemical Engineering,Yantai University,Yantai　264005,China;CAS Key Laboratory of Coastal Environmental Processes and Ecological Remediation,Research Center for Coastal Environmental Engineering and Technology of Shandong Province,Yantai Institute of Coastal Zone Research,Chinese Academy of Sciences,Yantai　264003,China;Dongying Jingze Membrane Technology Ltd.,Shandong Province,the Yellow River Delta Agricultural High-tech Industrial Demonstration Area,Dongying　257091,China)

机构地区：[1]烟台大学化学化工学院,山东烟台264005 [2]中国科学院烟台海岸带研究所山东省环境工程研究中心中国科学院海岸带环境过程与生态修复重点实验室,山东烟台264003 [3]山东省东营净泽膜科技有限公司黄河三角洲农业高新技术产业示范区,山东东营257091

出　　处：《山东化工》2018年第5期33-37,共5页Shandong Chemical Industry

基　　金：山东省重点研发计划(2016ZDJS04B03)

摘　　要：利用聚多巴胺对粘土进行改性制得PDA-Clay,显著提升粘土在有机溶剂中的分散性;将改性粘土与聚偏氟乙烯(PVDF)共混,通过相转化的方法制备PVDF中空纤维杂化膜。实验结果表明:PDA-Clay纳米颗粒的含量对PVDF中空纤维膜的结构具有明显的影响;与PVDF膜相比,杂化膜的亲水性和机械强度均有明显的提高;当PDA-Clay添加量为2.0%(质量分数)时,杂化膜的机械强度由2.0MPa提高至2.9 MPa,内外表面的接触角分别由73.7°、72.6°下降至55.4°、56.8°。因此,通过聚多巴胺亲水改性粘土,并与聚偏氟乙烯掺杂共混,可成功制备亲水性好和机械强度高的PVDF中空纤维杂化膜。Clay was surface modified through dopamine chemistry to achieve polydopamine coated clay(PDA-Clay)and to improve its dispersibility in organic solvents.The PVDF hybrid hollow fiber ultrafiltration membrane was fabricated through the phase inversion method upon the mixing with PVDF casting solution and PDA-Clay.Results found that the addition of PDA-Clay significantly affected the structure and property of PVDF hydrid hollow fibers with the improved surface hydrophilicity and mechanical strength,compared with pristine PVDF hollow fibers.Moreover,the tensile strength of hollow fibers was increased from 2.0 MPa to 2.9 MPa when 2 wt.%PDA-Clay was added into the PVDF casting solution,and the water contact angle of hollow fiber surfaces decreased from 73.7°to 55.4°in the inner surface and decreased from 72.6°to 56.8°in the outer surface,compared with pristine PVDF hollow fibers.Therefore,the hybrid of PVDF with PDA-clay could improve the properties of PVDF hollow fiber ultrafiltration membrane including the increased hydrophilicity and mechanical strength.

关 键 词：PVDF超滤膜 中空纤维 粘土 多巴胺 

分 类 号：TQ342.712[化学工程—化纤工业]