新型氟乙烯乙烯基醚树脂增强膜材料的制备及其力学性能

Development of novel fluoroethylene vinyl ether reinforcement membrane and its mechanical properties

针对聚四氟乙烯(PTFE)膜材料烧结成型温度高,能量消耗大,安全生产要求高等难题,研发了可兼顾PTFE膜各方面性能的低温成型氟乙烯乙烯基醚树脂(FEVE)膜。研究了以涤纶织物为基材,FEVE树脂为基体的实验室手工刮涂和200℃以内的低温固化成型工艺,并将研制的FEVE/涤纶膜材料与广泛使用的PTFE/玻璃纤维膜材料在力学性能和自洁性方面进行了对比。结果表明:FEVE膜材料的拉伸强度可达到PTFE建筑膜材料的99.6%,撕裂强度可通过浸渍涂层法达到PTFE膜材料的1.3倍,表征抗沾污性的接触角为100.4°,满足了膜材料疏水接触角大于或等于90°的要求,从而印证了FEVE膜材料低温成型技术的可行性。

Aiming at the problems of high temperature,high energy consumption and high safety requirements of poly（ tetrafluoroethylene）（ PTFE） membrane,a low temperature-forming fluoroethylene vinyl ether（ FEVE） membrane taken into account all aspects of PTFE membrane was developed. The manual coating method in laboratory and the low temperature curing process within 200 ℃ with polyester fabric as reinforcement material and FEVE resin as matrix were developed. The mechanical properties and self cleaning properties of the FEVE/polyester reinforced membrane material and the widely used PTFE/glass fiber membrane were also compared. It is concluded that the developed FEVE membrane materials have the tensile strength up to 99. 6% of the PTFE membrane,the tear properties up to 1. 3 times after impregnation coating to PTFE membrane,and it has good contamination resistance with the contact angle up to 100. 4°,which meets the hydrophobic requirement of membrane contact angle greater than or equal to 90°. These conclusions confirmed the feasibility of low temperature forming of FEVE membranes.