化学改质蓖麻油的流变性能和摩擦学特性研究  

Rheological and Tribological Characteristics of Chemically Modified Castor Oil

作　　者：叶斌[1] 虞文良[1] 王彬[2] 陶德华[2] 

机构地区：[1]上海应用技术学院化工系,上海200233 [2]上海大学润滑化学研究室,上海200072

出　　处：《润滑与密封》2005年第1期37-38,共2页Lubrication Engineering

基　　金：上海市教委科技基金项目(04-OB18);上海应用技术学院人才引进基金项目(YJ2003-01)

摘　　要：通过对天然蓖麻油进行化学改质, 利用异构化反应增加分子侧碳链的长度, 以提高其粘度指数和降低其倾点; 考察了改质蓖麻油的流变性能和摩擦化学性能。实验结果表明, 天然蓖麻油经化学改质后流变性能得到了较大改进, 其抗磨减摩性能优于同粘度的矿物油, 相当于季戊四醇酯或癸二酸二异辛酯。Natural castor oil was chemically modified to extend the carbon chains by means of iso-reaction so as to improve the rheological behavior, by way of increasing the viscosity index and decreasing the pour point. The rheological and tribological characteristics of the reconstructed castor oil were comparatively investigated with those of the natural castor oil and several other vegetable oils and a mineral oil. The friction and wear test results on a four-ball machine indicate that the chemically reconstructed castor oil has considerably improved rheological and tribological properties as compared with the natural castor oil. It shows a greatly increase viscosity index and largely decreased pour point, which makes it applicable to low temperature lubrication. The chemically reconstructed castor oil even shows better tribological behavior than pentaerythritol ester or di-iso-capryl sebacate. However, it is still needed to increase the oxidation stability of the reconstructed castor oil.

关 键 词：流变性能 蓖麻油 改质 癸二酸二异辛酯 季戊四醇酯 异构化反应 粘度指数 倾点 减摩性能 摩擦学特性 

分 类 号：TH117[机械工程—机械设计及理论] TE624[石油与天然气工程—油气加工工程]