《聚四氟乙烯聚乙烯醇复合纳米纤维的研究》.pdfVIP

中国科技论文在线 聚四氟乙烯/聚乙烯醇复合纳米纤维的研究# 霍鹏飞，宋立新，杜平凡，薛钱华，熊杰** （浙江理工大学先进纺织材料与制备技术教育部重点实验室，杭州 310018） 5 摘要：将聚四氟乙烯（PTFE ）浓缩乳液和聚乙烯醇（PVA ）共混于水中形成纺丝液，将该 纺丝液进行静电纺丝，并通过扫描电镜观测其形态结构，分析讨论纺丝条件对聚四氟乙烯/ 聚乙烯醇复合纳米纤维形貌的影响。采用红外光谱（IR ）和X-射线衍射（XRD ）对复合纤 维膜进行表征。并对复合纤维膜的力学性能进行了测试。结果表明：在聚四氟乙烯与聚乙烯 醇质量比为 70:30 、纺丝浓度26wt% 、纺丝电压为 15kv、纺丝流率为0.008 ml/min 的条件下 10 制备的复合纳米纤维膜为聚四氟乙烯纳米纤维多孔膜的制备提供了一个良好的前驱体。此时 复合纤维膜模量为 22.2MPa 、拉伸强度为4.1MPa 和拉伸断裂应变为 63.4%。 关键词：聚四氟乙烯；聚乙烯醇；静电纺丝；复合纤维 中图分类号：TB332 15 Preparation and characterization of polytetrafluoethylene/polyvinyl alcohol ultrafine composite nanofibrous membranes HUO Pengfei, SONG Lixin, DU Pingfan, XUE Qianhua, XIONG Jie (Key laboratory of Advanced Textile Materials and Manufacturing Technology, Ministry of 20 Education, Zhejiang Sci-Tech University, HangZhou 310018) Abstract: Polyvinyl alcohol (PVA) and polytetrafluoethylene (PTFE) were blended in water and the resulting spinning solution was electrospun into nanofibers. The effects of electrospinning parameters on nanofibers morphology and diameter were investigated by SEM. Then the structure and mechanical properties were characterized by DSC, IR, and tensile testing. The results show 25 that when the mass ratio of PTFE to PVA is 70:30, electrospinning solution concentration is 26 wt%, applied voltage is 15 kV and solution flow rate is 0.008 ml/min, the ultrafine composite nanofibrous membranes with desirable morphology and mechanical properties could be obtained, which is a good precursor of the polytetrafluoethylene ul