纳米SiO_(2)表面改性及耐电晕漆包线漆的制备  

Surface modification of nano-silica and preparation of corona resistant wire enamel

作　　者：成昊霖 周剑林 曾荣今[1] CHENG Haolin;ZHOU Jianlin;ZENG Rongjin(College of Chemistry and Chemical Engineering,Environment and Safety Engineering,Hunan University of Science and Technology,Xiangtan 411201,China;Hunan Provincial Key Laboratory of Coal Resources Clean Utilization and Mine Environment Protection,Environment and Safety Engineering,Hunan University of Science and Technology,Xiangtan 411201,China;School of Resources,Environment and Safety Engineering,Hunan University of Science and Technology,Xiangtan 411201,China)

机构地区：[1]湖南科技大学化学化工学院,湖南湘潭411201 [2]湖南科技大学煤炭资源清洁利用与矿山环境保护湖南省重点实验室,湖南湘潭411201 [3]湖南科技大学资源环境与安全工程学院,湖南湘潭411201

出　　处：《绝缘材料》2023年第3期9-13,共5页Insulating Materials

基　　金：湖南省重点研发项目(2019GK2237);湖南省科技特派员项目(2021GK5048);湖南省自然科学基金资助项目(2021JJ50124)。

摘　　要：采用纳米粒子改性、逐步分散的方法解决漆包线漆中纳米粒子团聚的难题。分别用乳化剂OP-10、硅烷偶联剂AP1231、硅烷偶联剂A112、γ-丙基三甲氧基硅烷(KH-560)和N-[3-(三甲氧基硅基)丙基]乙二胺(KH-792)5种改性剂对纳米SiO_(2)粒子表面进行改性,研究改性剂种类、改性剂用量、改性温度及改性时间对纳米SiO_(2)粒子改性效果的影响,通过耐电晕性能测试对比了改性前后的纳米SiO_(2)粒子对耐电晕漆包线漆性能的影响,并用透射电子显微镜(TEM)观察改性前后纳米SiO_(2)粒子的分散状况。结果表明:经KH-560改性后的纳米SiO_(2)在漆包线漆中分散性最好,其最佳工艺条件为:KH-560质量分数为1.5%,改性温度为90℃,改性时间为4 h。将改性后的纳米SiO_(2)逐步均匀分散到漆包线漆中,可以得到高稳定性、耐电晕时间>50 h的漆包线漆,适宜的纳米SiO_(2)添加量为13.5%。The problem of nanoparticle agglomeration in wire enamel can be solved by modification and gradual dispersion of nanoparticles. Five modifiers, emulsifier OP-10, silane coupling agent AP1231, silane coupling agent A112, γ-propyl trimethoxysilane(KH560), and N-[3-(trimethoxysilyl) propyl] ethylenediamine(KH-792), were used to modify the surface of nano silica particles. The effects of modifier type, modifier dosage, modification temperature and time on the modification effect of nano-SiO_(2)particles were explored. The effects of nano-SiO_(2)particles before and after modification on the performance of corona resistant wire enamel were compared by corona resistance test, and the dispersion of nano-SiO_(2)particles before and after modification was observed by transmission electron microscopy(TEM). The results indicate that the nanoparticles modified by KH-560 have the best dispersion in wire enamel, and the best process conditions are as follows: the dosage of KH-560 is 1.5wt%, the modification temperature is 90℃, and the modification time is 4 h. The wire enamel with high stability and higher than 50 h of corona resistance time can be obtained by gradually dispersing modified nanoparticles into the wire enamel, and the appropriate addition amount of nanoparticles is 13.5wt%.

关 键 词：纳米SiO_(2) 改性 漆包线漆 耐电晕性 

分 类 号：TM215[一般工业技术—材料科学与工程]