摘要
电气设备长期运行易出现发热故障,造成安全事故。为了更好地进行温度监测,采用熔融法制备了由结晶紫内酯、双酚A、萘组成的三芳甲烷类可逆变色材料,通过分析不同配比(质量比)变色材料的变色性能来确定材料配比;将变色材料微胶囊化以提高其在户外环境中使用的稳定性,通过扫描电子显微镜(SEM)观测变色材料微胶囊微观形貌;为便于现场应用,基于变色材料微胶囊制备了示温涂料,并分析其变色性能及沿面放电。结果表明:变色材料的最佳配比为1:2:50(结晶紫内酯:双酚A:萘),材料的颜色主要受结晶紫内酯影响,材料的变色温度由萘的熔点决定,微胶囊呈直径20μm左右的球形,示温涂料的变色温度范围为79~81℃,颜色由天蓝色变为白色,单位长度沿面放电电压为7.74~8.27 kV/cm,高于一般环氧树脂及瓷绝缘材料,各项性能满足带电设备示温要求。
Long-term operation of electrical equipment is prone to heating faults,resulting in safety accidents.In order to monitor the temperature better,we prepared a triarylmethane reversible thermochromic material by fusion method which is composed of crystalline violet lactone,bisphenol A,and naphthalene.Through analyzing its discoloration performance for different ratios(mass ratio),we determined the best formula ratio of thermochromic material.Then,the thermochromic material was fabricated into microencapsulate to improve its stability in outdoor environment.Based on the scanning electron microscope(SEM),the microstructure of thermochromic material microcapsulation was observed.Additionally,based on the microcapsulation of the thermochromic material,a temperature-indicating coating was prepared for engineering application.Moreover,the discoloration and surface discharge performance of the temperature-indicating coating was studied.The results show that the optimum ratio of the thermochromic material is 1:2:50(crystal violet lactone:bisphenol A:naphthalene).The color of the thermochromic material is mainly affected by crystal violet lactone and the discolor temperature of the thermochromic material is determined by the melting point of naphthalene.The microcapsule is spherical with a diameter of around 20μm.The discolor temperature range of temperature-indicating coating is from 79℃to 81℃,and the color changes from sky blue to white.And the surface discharge voltage is 7.74~8.27 kV/cm,which is higher than that of the general epoxy resin and porcelain insulation materials.The properties of the coating can meet the temperature-indicating requirements of live electric equipment.
作者
胡琴
黄洪松
赵法强
邓莎莎
蒋兴良
陈加文
HU Qin;HUANG Hongsong;ZHAO Faqiang;DENG Shasha;JIANG Xingliang;CHEN Jiawen(State Key Laboratory of Transmission and Distribution Equipment and System Safety and New Technology,College of Electrical Engineering,Chongqing University,Chongqing 400030,China;Longgang Power Supply Company,Shenzhen Power Supply Bureau Co.,Ltd.,Shenzhen 518122,China;Chongqing Electric Power Trading Center Co.,Ltd.,Chongqing 400030,China)
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2022年第1期281-288,共8页
High Voltage Engineering
基金
深圳供电局有限公司科技项目(0910002019030103GLPW00107)。
关键词
三芳甲烷
可逆示温
微胶囊
电气设备
沿面放电
triarylmethane
reversible temperature indicator
microcapsulation
electrical equipment
surface discharge
