石墨烯微纳片复合密封垫铺叠热压成型工艺及性能

Laminated Hot Press Molding Process and Performance of Graphene Micro-nano Sheets Composite Sealing Gasket

密封材料在机械电力、石油化工领域具有广泛的应用,是防止发生泄漏和维护设备正常运行的重要基础元件。石墨烯微纳片因其具有良好的导热性、耐腐蚀性和力学性能,成为关键密封材料之一。实验以石墨烯微纳片为主要填料,以酚醛树脂(PF)和聚乙烯醇缩丁醛(PVB)为黏结剂,结合流延成型和堆叠热压成型技术,分别研究了石墨烯微纳片的含量、黏结剂比例和热压成型压力对复合密封垫的抗拉强度、压缩率和回弹率的影响,探索了石墨烯微纳片复合密封垫的铺叠热压成型工艺。结果表明:当石墨烯微纳片含量为55%、PF/PVB质量比为8∶15、成型压力为15 MPa、成型温度为120℃、保温时间为30 min时,石墨烯微纳片复合密封垫具有最佳的成型工艺性和性能,可制备满足质量要求的石墨烯微纳片复合密封垫。

Sealing materials have a wide range of applications in the fields of mechanical power and petrochemicals,they are important basic components for preventing leaks and maintaining the normal operation of equipment.Graphene micro-nano sheets have become one of the key sealing materials due to their excellent thermal conductivity,corrosion resistance,and mechanical properties.This article mainly uses graphene micro-nano sheets as the main filler,phenolic resin(PF)and polyvinyl butyral(PVB)as binders,combined with tape casting and hot pressing technology,to study the effects of graphene micro-nano sheets content,binder ratio,and hot pressing pressure on the tensile strength,compression rate,and rebound rate of composite sealing gaskets,and explore the hot pressing and laminated object manufacturing process of graphene micro-nano sheets composite sealing gaskets.The results show that when the content of graphene micro-nano sheets is 55%,the PF/PVB mass ratio is 8∶15,the molding pressure is 15 MPa,the molding temperature is 120℃,and the insulation time is 30 min,the graphene micro-nano sheets composite sealing gasket has the best molding processability and property,which can be prepared to meet the quality requirements of graphene micro-nano sheets composite sealing gaskets.