摘要
为开发具有高效过滤性能的膜材料,以超支化季铵盐(HBP-HTC)为枝化促进剂,利用静电纺丝技术一步法制备了聚偏氟乙烯(PVDF)树枝状纳米纤维膜,探讨了纺丝工艺对纤维膜成形结构的影响,分析了树枝状纳米纤维膜的力学性能及其空气过滤性能。结果表明:由于HBP-HTC表面丰富的季铵基团具有对电荷的稳定富集作用,可获得比用小分子季铵盐制成膜更多的树枝状纳米纤维结构,当PVDF质量分数为12%,季铵基团添加量为0.10 mol/L,纺丝电压为25 kV时,制得的纤维膜树枝状覆盖率高达78.32%,且具有较好的力学性能;所制备的纳米纤维膜厚度为40μm时,其过滤效率高达99.995%,而压降为122.4 Pa。
In order to develop membrane materials with high efficiency filtration performance,this research prepared polyvinylidene fluoride(PVDF)dendritic nanofiber membranes using hyperbranched quaternary ammonium salt(HBP-HTC)as a branching promoter based on electrostatic spinning technology in one step.The influence of the spinning process on the forming structure of the fiber membrane was explored.The mechanical properties of the dendritic nanofiber membrane were analyzed and its air filtration performance was measured.The results showed that the nanofiber membrane prepared with HBP-HTC has more dendritic structures than the membrance prepared with small molecule quaternary ammonium salts due to the abundant quaternary ammonium groups on the surface of HBP-HTC,which has a stable enrichment effect on charge.When the mass fraction of PVDF was 12%,the quaternary ammonium groups was 0.1 mol/L,and the spinning voltage was 25 kV,the dendritic coverage of the fabricated fiber membranes was as high as 78.32%and demonstrated good mechanical properties.The filtration efficiency of the prepared nanofiber membrane reached 99.995%at the thickness of 40μm,while the pressure drop is 122.4 Pa.
作者
姚莹
赵为陶
张德锁
林红
陈宇岳
魏红
YAO Ying;ZHAO Weitao;ZHANG Desuo;LIN Hong;CHEN Yuyue;WEI Hong(College of Textile and Clothing Engineering,Soochow University,Suzhou,Jiangsu 215021,China;Changzhou Vocational Institute of Textile and Garment,Changzhou,Jiangsu 213164,China;Suzhou Institute of Fiber Inspection,Suzhou,Jiangsu 215004,China)
出处
《纺织学报》
EI
CAS
CSCD
北大核心
2022年第10期1-9,共9页
Journal of Textile Research
基金
苏州市重点产业技术创新前瞻性应用研究项目(SYG201936)
国家先进功能纤维创新中心盛虹应急保障与公共安全用纤维材料及制品科研攻关项目(2020-fx010002)。
关键词
超支化季铵盐
静电纺丝
聚偏氟乙烯
树枝状纳米纤维
过滤性能
hyperbranched quaternary ammonium salt
electrostatic spinning
polyvinylidene fluoride
dendritic nanofiber
filtering performance
作者简介
第一作者:姚莹(1996—),女,硕士生。主要研究方向为微纳米纤维材料及其应用。通信作者:张德锁(1981—),男,副教授,博士。研究方向为功能与智能纤维材料及其应用。E-mail:dszhang@suda.edu.cn。
