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本文对豆油进行了化学改性,豆油环氧后和不同链长的脂肪酸进行酯化反应,生成一系列的改性豆油并对其结构进行表征;考察了不同烷链结构的改性豆油的摩擦学性能,结果表明所合成的系列改性豆油有优良的摩擦学性能,随着直链酸链长的不同黏度也不同,黏度越大润滑性能越好,其中乙酯和丙酯的黏度最大、润滑性能最好,摩擦学性能远远优于豆油和光亮油150BS,归因于豆油异构乙酯和丙酯含有极性基团,且分子中氧的含量较高,易生成吸附膜和氧化反应保护膜.豆油异构丙酯倾点最低,其黏度高,可以代替紧缺的光亮油和低黏度油调配成多种不同黏度级别的润滑油.豆油异构丙酯与聚醚调配的各黏度级别的润滑油的倾点明显低于同级别矿物油,摩擦学性能优于同级别矿物油,氧化稳定性也远远优于矿物油,可用作高档次的合成润滑油.试验结果表明用本工艺改善植物油的氧化稳定性和润滑性行之有效.
In this paper, the soybean oil was chemically modified. After esterification of soybean oil with different fatty acids with different chain lengths, a series of modified soybean oil was obtained and its structure was characterized. The friction of modified soybean oil with different alkyl chain structure The results show that the modified series of modified soybean oil has excellent tribological properties, with different viscosity of the linear chain length is also different, the greater the viscosity the better the lubricating properties, of which ethyl ester and propyl ester maximum viscosity, Lubricating properties of the best tribological properties far superior to soybean oil and bright oil 150BS, due to the isomeric ethyl ester and propyl ester of soya oil containing polar groups, and high molecular oxygen content, easy to generate adsorption film and oxidation Reaction of protective film.Easilypropyl ester of soybean oil pour point minimum, its high viscosity, can replace the shortage of bright oil and low viscosity oil formulated into a variety of different viscosity grade lubricants.Ethyl isostearate and polyether formulated viscosity Level of the pour point of oil was significantly lower than the same level of mineral oil, tribological properties better than the same level of mineral oil, oxidation stability is far superior to mineral oil, can be used as high-grade synthetic lubricants.Experimental results show that the use of The process to improve the plant The effective oxidation stability and lubricity.