文献类型：期刊文献

英文题名：High silica fiberglass cloth/PTFE composites: Interfacial bonding and dielectric property enhancement

作者：Sun, Mingzhe[1];Huang, Jianguo[1];Ning, Xiangchun[2]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]Henan Guangyuan New Mat Co Ltd, Linzhou, Henan, Peoples R China

年份：2024

卷号：45

期号：18

起止页码：16945

外文期刊名：POLYMER COMPOSITES

收录：;EI(收录号：20243416906046);WOS:【SCI-EXPANDED(收录号:WOS:001292971300001)】；

基金：National Natural Science Foundation of China, Grant/Award Number: 52072123

语种：英文

外文关键词：composites; dielectric properties; high silica fiberglass; polytetrafluoroethylene; silane coupling agent

摘要：In this study, high silica fiberglass cloth (HSFC) was prepared using the acid leaching method with E-fiberglass cloth as the raw material. Following heat treatment and silane coupling agent treatment, the cloth was impregnated with a polytetrafluoroethylene (PTFE) emulsion to fabricate a HSFC/PTFE composite via the hot-pressing method. The microstructure of the composite and its dielectric properties at a 10 GHz frequency was investigated. To address the interfacial bonding issue of the composite, pre-sintering treatment and silane coupling agent application were employed, resulting in reduced porosity and increased density of the composite. In particular, the composite treated with KH-570 silane coupling agent exhibited the lowest porosity, with a dielectric constant of 2.419 and a dielectric loss of 0.0049. This study offers a new direction for expanding the application of high silica glass clothes in high-performance glass fiber composites. Highlights A low dielectric composite was made from high silica fiberglass and polytetrafluoroethylene. Heat treatment reduced hydroxyl groups on the fiberglass surface. Surface modification enhanced interfacial bonding and dielectric properties. Pre-sintering removed impurities and reduced composite porosity. Lower porosity reduced the dielectric loss of the composite.