植物绝缘油主要组分的理化与电气性能研究  

Physical-chemical and Electrical Properties Study of Main Components in Vegetable Insulating Oils

作　　者：陈朋[1] 余辉[1] 陈江波[2] 蔡胜伟[2] 周翠娟[2] 于萍[1] 罗运柏[1] 

机构地区：[1]武汉大学化学与分子科学学院,武汉430072 [2]中国电力科学研究院,武汉430074

出　　处：《绝缘材料》2014年第3期45-49,共5页Insulating Materials

基　　金：国家电网公司科技项目(SG11068)

摘　　要：以市售葵花籽油为原料,通过酯交换反应、尿素包合法等工艺分离提纯出亚油酸甘油酯,用作植物油中主要组分的标准物质,检测了菜籽油中含量较高的3种主要化学成分的理化与电气性能,研究了油脂不饱和度对其理化性能、电气性能和氧化安定性的影响。结果表明:油脂的饱和度越高,闪点越高;油脂的不饱和度越高,倾点越低,运动粘度越低;油脂的不饱和度越低,氧化安定性越好;植物油脂的相对介电常数高于矿物变压器油的相对介电常数。A glyceryl linoleate was separated and purified by ester exchange reaction and urea adduct method from commercial sunflower seed oil. The glyceryl linoleate was used as the standard substance of main components of vegetable oils, and the physical-chemical and electrical properties of three main components of vegetable oils were tested, and the effects of unsaturated degree of the oils on their physical-chemical properties, electrical properties and oxidation stability were studied. The results show that the higher the saturation degree of the oils, the higher the flash point is. The higher the unsaturated degree of the oils, the lower the pour point and kinematic viscosity are. The lower the unsaturated degree of the oils, the better the oxidation stability is. The relative dielectric constant of the vegetable oils is higher than that of the mineral transformer oil.

关 键 词：植物绝缘油 理化性能 电气性能 氧化安定性 

分 类 号：TM214[一般工业技术—材料科学与工程]