静电纺聚丙烯腈复合滤料的制备与性能  

Preparation and property of electrospun polyacrylonitrile composite filter

作　　者：皇甫晨晨 邓炳耀[1,2] 刘庆生[1,2] Huangfu Chenchen Deng Bingyao Liu Qingsheng(Laboratory of Nonwoven Technology,Jiangnan University, Wuxi 214122 Key Laboratory of Eco-Textiles （Jiangnan University）,Ministry of Education,Wuxi 214122)

机构地区：[1]江南大学非织造技术中心,无锡214122 [2]生态纺织教育部重点实验室(江南大学),无锡214122

出　　处：《化工新型材料》2016年第12期226-228,共3页New Chemical Materials

基　　金：江苏省科技成果转化项目(BA2012021)

摘　　要：将聚丙烯腈粉末加入到N,N-二甲基甲酰胺中,制备12%（wt,质量分数）的纺丝液。以聚丙烯熔喷非织造布为基布,通过改变纺丝时间,制得不同厚度的复合滤料。通过扫描电子显微镜观察熔喷布和纳米纤维的外观形貌,并对复合滤料的孔径、孔径分布、过滤效率、透气性进行表征。结果表明：采用静电纺丝的方法纺制了平均直径为220nm的聚丙烯腈纳米纤维。随着纺丝时间的增加,复合滤料的孔径不断减小,过滤效率逐渐提高,透气性下降。当纺丝时间为60min时,复合滤料的孔径尺寸集中分布在2~5μm,对粒径“≥1.0μm〈2.0μm”颗粒的过滤效率为99.85%,压力降为200Pa,符合医用防护口罩技术要求,过滤性能达到2级。Spinning solution with the mass fraction of 12% （wt） was prepared by dissolving polyacrylonitrile powder in N, N-dimethyl formamide. During electrospinning,PP melt blown nonwoven fabric used as collecting substrate,compos- ite filter with different thickness of electrospun polyacrylonitrile nanofiber mat was prepared by changing elespinning time. The morphology of melt-blown nonwoven fabric and nanofiber were tested by SEM. The pore size, the pore size distribu- tion, the filtration efficiency, the permeability of composite filter were characterized. The results showed that the spinning solution was electrospun into polyacrylonitrile nanofibers, which had the average diameter of 220nm. With the increase of electrospinning time, the pore size and permeability of filter reduced, however, the filtration efficiency of filter gradually im- proved. When the electrospinning time reached 60 minutes, the pore size was narrow distribution in 2 ~ 5μm. When particle size was more than 1.0μm less than 2.0μm,the filtration efficiency of filter was 99.85%.

关 键 词：静电纺丝 聚丙烯腈 复合滤料 过滤效率 透气率 

分 类 号：TQ340.64[化学工程—化纤工业]