涂覆聚间苯二甲酰间苯二胺浆液提高间位芳纶纸电气强度的研究  

Study on Electric Strength of Meta-aramid Paper Improved by Coating Poly(m-phthaloyl-m-phenylenediamine) Slurry

作　　者：顾思琦 胡祖明[1,2] 于俊荣[1,2] 王彦[1] 诸静[1] GU Siqi;HU Zuming;YU Junrong;WANG Yan;ZHU Jing(College of Materials Science and Engineering,Donghua University,Shanghai 201620,China;State Key Laboratory for Modification of Chemical Fibers and Polymer Materials,Donghua University,Shanghai 201620,China)

机构地区：[1]东华大学材料科学与工程学院,上海201620 [2]东华大学纤维材料改性重点实验室,上海201620

出　　处：《绝缘材料》2022年第9期28-34,共7页Insulating Materials

基　　金：国家重点研发计划项目(2021YFB3700101)。

摘　　要：采用不同固含量的聚间苯二甲酰间苯二胺(PMIA)浆液对间位芳纶纸进行表面涂覆,然后对涂覆PMIA浆液后的间位芳纶纸进行烘干处理。采用冷场发射扫描电子显微镜、万能试验机、宽频介电阻抗谱仪和电气强度测试仪表征改性间位芳纶纸的形貌、力学性能、介电性能和电气强度。结果表明:PMIA浆液能够改变间位芳纶纸的结构,并减小间位芳纶纸内部孔洞。当表面涂覆的PMIA浆液的固含量为10%时,间位芳纶纸的横向和纵向抗张强度分别提升至51.3 MPa和94.4 MPa。此外,涂覆固含量为10%的PMIA浆液的间位芳纶纸介电常数为2.07,电气强度提升至29.83 kV/mm。表面涂覆PMIA浆液后的间位芳纶纸力学性能和电气强度优于原始芳纶纸,并且在180℃下处理后,改性间位芳纶纸的力学性能和电气强度仍优于原始间位芳纶纸,能够满足芳纶纸在更高电场强环境中的应用,进一步拓宽了芳纶纸的应用领域。The surface of meta-aramid paper was coated with poly(m-phthaloyl-m-phenylenediamine)(PMIA)slurry with different solid contents, and the coated meta-aramid paper was dried. The morphology, mechanical properties, dielectric properties, and electric strength of the modified meta-aramid paper were characterized by cold field emission scanning electron microscope, universal testing machine, broadband dielectric impedance spectrometer, and electric strength testing instrument. The results show that the PMIA slurry can change the structure of aramid paper and decrease the internal void of aramid paper. When the solid content of PMIA slurry is10%, the transverse and longitudinal tensile strength of meta-aramid paper increases to 51.3 MPa and 94.4 MPa,respectively, the dielectric constant of meta-aramid paper is 2.07, and the electric strength of meta-aramid paper increases to 29.83 kV/mm. The mechanical properties and electric strength of the meta-aramid paper coated with PMIA slurry are better than those of original aramid paper. After treated at 180℃, the mechanical properties and electric strength of the modified meta-aramid paper are still better than those of original meta aramid paper, which can meet the applications of aramid paper in higher electric field environment and further broaden the applications field of aramid paper.

关 键 词：间位芳纶纸 聚间苯二甲酰间苯二胺 表面涂层 电气强度 

分 类 号：TM215[一般工业技术—材料科学与工程]