摘要
通过酯化反应和酰胺化反应,在月桂酸的基础上引入B、N极压吸附基团,合成了月桂酰胺硼酸酯液压支架传动介质用润滑剂,利用红外光谱和核磁氢谱进行结构表征,利用四球法考察了添加剂水溶液的摩擦学性能,并探究了润滑机理。结果表明:添加剂具有良好的水解安定性,当质量浓度为0.4%时,P_(B)值为696 N,磨斑直径随浓度升高逐渐减小后趋于平缓,随载荷升高先增大后减小再增大,这是由于在低载荷下主要靠吸附起到边界润滑作用,随着载荷的增加,摩擦副接触区生成了Fe_(2)O_(3)、Fe_(2)B、BN、B_(2)O_(3)等物质堆积到金属表面形成的高强度化学反应膜和吸附膜共同形成了复合膜,对摩擦副起到了有效的保护作用。
Through esterification reaction and amidation reaction,N and B extreme pressure adsorption groups were introduced on the basis of lauric acid to synthesize lauric acid amide borate ester lubricant for hydraulic support transmission medium.The structure was characterized by IR and ^(1)H NMR.The tribological properties of additive aqueous solution were investigated by four ball method,and its lubrication mechanism was explored.The results show that the additive has good hydrolytic stability.When the mass concentration is 0.4%,the P_(B) value is 696 N.The wear scar diameter decreases gradually with the increase of concentration and then tends to be flat.With the increase of load,the wear scar diameter first increases,then decreases and then increases.This is because the boundary lubrication is mainly played by adsorption under low load.With the increase of load,Fe_(2)O_(3),Fe_(2)B,BN,B_(2)O_(3) and other substances are formed in the contact area of the friction pair,which are stacked on the metal surface to form a high-strength chemical reaction film and an adsorption film together to form a composite film,which plays an effective role in protecting the friction pair.
作者
杭智军
孟征
HANG Zhi-jun;MENG Zheng(Mining Materials Branch,China Coal Research Institute,Beijing 100013,China;Chinese Institute of Coal Science,Beijing 100013,China)
出处
《应用化工》
CAS
CSCD
北大核心
2024年第4期818-822,共5页
Applied Chemical Industry
基金
国家重点研发计划(2017YFC0602803)
天地科技股份有限公司科技创新创业资金专项项目(2022-2-TD-QN004)。
关键词
水基润滑剂
含氮硼酸酯
润滑机理
水解安定性
water-based lubricant
nitrogen-containing borate
lubrication mechanism
hydrolytic stability
