鱼皮多肽作为水基润滑添加剂的摩擦学性能与机理研究  

The Lubricating Property and Mechanism of Fishskin Peptide-Based Aqueous Lubricant Additives

作　　者：张恩惠 王宁丽[2,3] 李维民 赵改青[1,3] 王晓波 ZHANG Enhui;WANG Ningli;LI Weimin;ZHAO Gaiqing;WANG Xiaobo(State Key Laboratory of Solid Lubrication,Lanzhou Institute of Chemical Physics,Chinese Academy of Sciences,Gansu Lanzhou 730000,China;CAS Key Laboratory of Chemistry of Northwestern Plant Resources and Key Laboratory for Natural Medicine of Gansu Province,Lanzhou Institute of Chemical Physics,Chinese Academy of Sciences,Gansu Lanzhou 730000,China;Qingdao Center of Resource Chemistry and New Materials,Shandong Qingdao 266100,China;Zibo Innovation Center of High-end Synthetic Lubricating Materials,Shandong Zibo 255000,China)

机构地区：[1]中国科学院兰州化学物理研究所固体润滑国家重点实验室,甘肃兰州730000 [2]中国科学院兰州化学物理研究所中国科学院西北特色植物资源化学重点实验室/甘肃省天然药物重点实验室,甘肃兰州730000 [3]青岛市资源化学与新材料研究中心,山东青岛266100 [4]淄博高端合成润滑材料创新中心,山东淄博255000

出　　处：《摩擦学学报（中英文）》2024年第2期233-241,共9页Tribology

基　　金：国家自然科学基金项目(51975560);兰州化物所青年联合基金项目(HZJJ21-08);泰山学者项目资助。

摘　　要：采用酶解和大孔树脂分离技术从渔业废弃物中提取了3种不同极性的多肽,研究了多肽在水乙二醇溶液中溶解性、摩擦学性能,并探讨了其摩擦学机理.结果表明,所制备的3种不同极性的多肽在水乙二醇体系中均具有良好的溶解性,且具有较高的热稳定性.摩擦学研究表明,多肽可显著提升水乙二醇溶液在钢/钢摩擦副间的减摩、抗磨性能,有效保护摩擦副表面,其中小极性的多肽抗磨性能最强,磨损体积比水乙二醇溶液降低55.49%,并且3种多肽均可显著提升水乙二醇的抗承载性能.多肽的分子结构中存在较多的极性基团,有助于多肽与金属摩擦副表面发生物理吸附,而且多肽在摩擦副表面还形成1层以含碳、氮有机化合物、铁氧化物为主的化学反应膜.因此,多肽优异的摩擦学性能是摩擦化学反应和物理吸附协同作用的结果.The peptide was extracted from fishery wastes by enzymolysis and then separated into three components by polarity with macroporous resin.The amino acid and elemental composition of three peptides were determined.Results showed that peptides contain amino acids with sulfur-based groups and N-heterocyclic groups,which was beneficial for lubricating property of peptides as additives.Furthermore,three peptides all showed excellent solubility in glycol solution(water and glycol,v/v=1:1)at the concentration of 3%(mass fraction).The thermal decomposition temperature of peptides was beyond 250℃,indicating the good thermal stability of peptides.The tribological properties of polypeptides in water glycol solution were also studied,and the tribological mechanism was proposed.SRV test showed that peptides can significantly improve the antifriction performance of glycol solution between steel/steel friction pairs.The average friction coefficient of peptides lied between 0.135~0.144 in comparison to 0.186 of glycol solution.Three peptides are similar in anti-friction performance and the concentration of peptide in glycol solution has little influence on that.The 3D optical surface profiler was utilized to determine the volume of wear scar and results showed peptide could protect the surface of the friction pair effectively.The peptide with smallest polarity showed strongest anti-wear performance,and the wear volume was reduced by 55.49% compared with glycol solution.In load ramp test,the seizure in friction coefficient curves appear at 350,250 and 350 N for three peptides,in comparison to 200 N for glycol solution.It was indicated that all three peptides can significantly increase extreme pressure properties of glycol solution,which might be related to the existence of sulfydryl and N-heterocyclic groups of some amino acids.It should be noted that the sulfur content of peptide is relatively low compared to other extreme pressure additives,therefore peptide can not cause serious environmental pollution and corrosion of machin

关 键 词：水基润滑剂 环境友好润滑添加剂 多肽 摩擦学性能 摩擦学机理 

分 类 号：TH117.1[机械工程—机械设计及理论]