摘要
合成了含羧酸酯基官能团的功能化离子液体——1-乙酸乙酯基-3-甲基咪唑四氟硼酸盐([EAMIM]BF4),考察了其物化性质、高低温下的摩擦学性能以及对传统润滑油添加剂的相容性和感受性,并选择含有相同烷基的1-丁基-3-甲基咪唑四氟硼酸盐传统离子液体([BMIM]BF4)作为对比。结果表明:两种离子液体具有较好的低温流动性、低的蒸发损失和高的热稳定性;能溶解部分具有强极性和杂环化合物的传统润滑油添加剂,但不能溶解大多数常用的油溶性添加剂,[EAMIM]BF4对添加剂的溶解性比[BMIM]BF4弱;在室温及高温条件下,[EAMIM]BF4由于黏度较大而减摩性稍差,但抗磨性比[BMIM]BF4强;极压抗磨剂亚磷酸二正丁酯能提高[BMIM]BF4的抗磨作用,但与[EAMIM]BF4呈现出对抗效应,导致其润滑性能降低。
A new kind of ester-group functionalized ionic liquid, 1-ethoxycarbonylmethyl-3-methyl imidazolium tetrafluoroborate （[EAMIM] BE4 ）, were synthesized. Its physicochemical properties, tribological behavior （at room temperature and 100 ℃）, compatibility and susceptibility to some conventional lube additives were studied and compared with a conventional ionic liquid, 1-butyl-3-methy imidazolium tetrafluoroborate （[BMIM]BF4）,which had the same alkyl as the functionalized one. It was found that both ionic liquids had good low-temperature fluidity, low evaporation loss and high thermal stability. Their solubility with most commonly oil-soluble lube additives was poor, except with some having strong polar compounds or with heterocyclic structures, and between these two, [BMIM]BF4 was better. The friction reducing performance of [EAMIM]BF4 was less significant than that of [BMIM]BF4 due to its high viscosity,yet its antiwear ability was better than that of [BMIM]BF4 at both room tern- perature and 100 ℃. The addition of antiwear performance of [BMIM]BF4, however, negative additive di-n-butylphosphite could improve the antiwear effect was observed with [EAMIM]BF4.
出处
《石油炼制与化工》
CAS
CSCD
北大核心
2011年第9期65-69,共5页
Petroleum Processing and Petrochemicals
基金
重庆市科委自然科学基金计划资助项目(CSTC
2010BB0201)
