静电驻极mTiO2@PVDF电纺膜用于空气过滤  

Static electricity charged mTiO2@PVDF electrospun membrane for air filtration

作　　者：田文军 郝铭 李芳颖 黄政 刘延波[1] Tian Wenjun;Hao Ming;Li Fangying;Huang Zheng;Liu Yanbo(School of Textile and Engineering,Wuhan Textile University,Wuhan 430200,China)

机构地区：[1]武汉纺织大学纺织与工程学院

出　　处：《产业用纺织品》2019年第12期29-36,共8页Technical Textiles

基　　金：国家自然科学基金项目(51373121,5197031453)

摘　　要：采用硅烷偶联剂KH570对TiO2纳米颗粒进行改性并掺杂到PVDF溶液中,通过静电纺丝工艺制备出改性TiO2掺杂PVDF(mTiO2@PVDF)电纺膜,再对mTiO2@PVDF电纺膜进行静电驻极处理。通过粒径测试、红外光谱分析、紫外-可见光吸收光谱分析等表征TiO2纳米颗粒的改性效果,并对静电驻极处理后的mTiO2@PVDF电纺膜的表面形貌与结构、孔径分布、透气性能、拉伸性能、驻极性能、拒水性能和过滤性能等进行测试。结果表明:mTiO2纳米颗粒掺杂量为5.0%(质量分数)时,mTiO2@PVDF电纺膜的综合性能最佳,水接触角为122.3°,表面电势达到-9.0 kV左右,过滤效率为98.627%;当mTiO2@PVDF电纺膜的面密度为2.2 g/m^2时,其过滤性能最佳,过滤效率为98.799%,过滤阻力为90 Pa。该结果显示静电纺丝技术结合静电驻极技术可获得高效低阻的纳米纤维过滤材料。TiO2 nanoparticles modified by using the coupling agent of KH570 were doped into PVDF solution to prepare the modified TiO2 nanoparticles doped with PVDF(mTiO2@PVDF)electrospun membranes through the electrospinning process,and the mTiO2@PVDF electrospun membranes were treated by static electricity charging.The modification effects of TiO2 nanoparticles were characterized by the testing of particle size,FTIR analysis and UV-VIS analysis.The surface morphology and structure,pore diameter distribution,air permeability,tensile property,electret performance,water repellency and filtration performance of the mTiO2@PVDF electrospun membranes after static electricity charging were tested.The results showed that when the doping amount of mTiO2 nanoparticle was 5.0%(mass fraction),the mTiO2@PVDF electrospun membrane had the best comprehensive performance,its contact angle was 122.3°,the surface potential reached about-9.0 kV,and the filtration efficiency was 98.627%.When the surface density of mTiO2@PVDF electrospun membrane was about 2.2 g/m^2,its filtration performance was the best,the filtration efficiency was 98.799%and the filtration resistance was 90 Pa.This results indicated that the combination of electrospinning technology and electric charging technology might result in nanofibrous filtering materials with high filtration efficiency and low filatration resistance.

关 键 词：静电驻极 电纺膜 空气过滤 表面电势 过滤效率 

分 类 号：TS107.2[轻工技术与工程—纺织工程]