摘要
为减少轮缘与铁轨之间的摩擦,制备以己二酸二异辛酯为基础油的锂基固体润滑脂,对其滴点、锥入度、腐蚀性能、含水量、分油率、抗磨性能和降解性能进行测定,并对结构进行表征。研究结果表明:当异辛醇与己二酸的摩尔比为2.5∶1,带水剂用量为7 mL,催化剂用量为0.146 g,反应时间为60 min时,合成双酯的酯化率最高,达到99.13%。当双酯基础油为81%,稠化剂为14%,反应温度为105℃左右,反应时间为3 h,以及添加少量添加剂时,所制得的润滑脂性能最好,其滴点为196.5℃,锥入度为280.4×0.1 mm,最大无卡咬负荷为490 N。微生物降解实验表明,己二酸二异辛酯基础油和制得的润滑脂均具有一定的生物降解性,降解率分别为78.2%和69.6%。
A lithium-based solid grease was prepared with diisooctyl adipate as based oil to decrease the wearing between the rim and rail. The drop point, penetration, erosion property, moisture content, points oil rate, anti-wear property and biodegradability as-pre- pared grease were determined, and its structure characters were characterized. The results show that, when the molar ratio of hexane di- acid and 2-ethyl hexanol is 2. 5： 1, the amount of water carrying agent is 7 mL, catalyst is 0. 146 g and the reaction time is 60 min, the highest esterification rate of 99. 13 % is reached. The grease with the best performance, whose drop point is 196. 5 ℃, penetration is 280. 4 ×0. 1mm, and the maximum non-seizure load is 490 N, is obtained when the base oil accounts for 81% and thickening agent for 14%, the reaction temperature is controlled at about 105 ℃ for 3h, and a small amount of additives are added. The microbial degrada- tion experiment shows that the di-isooctyl adipate and the as-prepared grease are biodegradable on a certain extent, the degradation rate is 78.2% and 69.6% seoaratelv.
出处
《润滑与密封》
CAS
CSCD
北大核心
2014年第5期87-92,共6页
Lubrication Engineering
