聚乙二醇分子量对合成的水性聚醚酯的摩擦学性能影响  

Influence of Polyethylene Glycol Molecular Weight on the Tribological Properties of Synthesized Water-soluble Polyether Ester

作　　者：邵文强 徐超 娄文静[2,3] 刘晓玲 SHAO Wenqiang;XU Chao;LOU Wenjing;LIU Xiaoling(School of Mechanical and Automotive Engineering,Qingdao University of Technology,Qingdao Shandong 266520,China;State Key Laboratory of Solid Lubrication,Lanzhou Institute of Chemical Physics,Chinese Academy of Sciences,Lanzhou Gansu 730000,China;Qingdao Key Laboratory of Lubrication Technology for Advanced Equipment,Qingdao Center of Resource Chemistry and New Materials,Qingdao Shandong 266100,China)

机构地区：[1]青岛理工大学机械与汽车工程学院,山东青岛266520 [2]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 [3]青岛市高端装备润滑技术重点实验室,青岛市资源化学与新材料研究中心,山东青岛266100

出　　处：《润滑与密封》2024年第12期106-117,共12页Lubrication Engineering

基　　金：山东省泰山学者青年专家计划;中国科学院战略性先导科技专项(C类:XDC04020600)。

摘　　要：为改善水溶性聚醚酯的水溶性和摩擦性能,采用3种大相对分子质量(1500、2000、4000)的聚乙二醇与小分子量的正庚酸进行酯化反应,制备出3种聚醚酯(PEEs)添加剂,利用红外光谱仪和核磁共振波谱仪对其进行分子结构表征和官能团分析,采用SRV-V试验机和攻丝扭矩试验机考察其在去离子水中的摩擦学性能;采用非接触式三维轮廓仪、扫描电子显微镜(SEM)分析摩擦试验后试样磨痕表面形貌,借助X射线光电子能谱仪(XPS)分析PEEs的作用机制;评价PEEs添加剂的抗泡性能、高低温稳定性能及防腐性能。结果表明:PEEs在去离子水中展现出优异的减摩抗磨性能,这是因为PEEs结构中的酯基官能团能与金属摩擦副表面发生强的相互作用,从而形成一层较为牢固的吸附膜;PEEs质量分数为3%的水溶液摩擦因数最低,磨损体积最小;PEEs的抗磨减摩性能随聚乙二醇分子量的增大而减小;3种PEEs水溶液具有良好的高低温稳定性能和防腐性能,其抗泡性能和常用的2种反向嵌段聚醚相当,这是因为PEEs结构中含有疏水基团长链烷基有利于提高水溶液的抗泡性能。To improve the water solubility and friction properties of water-soluble polyether esters,three types of polyethylene glycol with relative molecular weights(1500,2000,4000)were esterified with small molecular weight n-heptane acid to prepare three types of polyether ester(PEEs)additives.The molecular structure and functional groups of the prepared PEEs were characterized by infrared spectroscopy and nuclear magnetic resonance spectroscopy.SRV-V testing machine and tapping torque test bench were used to investigate the tribological performance of PEEs in deionized water,and non-contact three-dimensional profiler and scanning electron microscope(SEM)were used to analyze the morphology of the wear scar surface of the sample after fiction test.The lubrication mechanism of PEEs was analyzed by X-ray photoelectron spectroscopy(XPS),and the anti-foaming properties,high and low temperature stability and anti-corrosion properties of PEEs additives were evaluated.The results show that PEEs exhibit excellent anti-wear and friction reduction performance in deionized water,because the ester functional groups in the PEEs structure can strongly interact with the surface of metal friction pairs to form a relatively strong adsorption film.The aqueous solution with PEEs mass fraction of 3%has the lowest friction coefficient and the smallest wear volume.As the molecular weight of polyethylene glycol increases,the anti-wear and friction reducing properties of PEEs aqueous solution gradually weakens.Three types of PEEs aqueous solutions have good high and low temperature stability and anti-corrosion properties,and their anti-foaming properties is comparable to the two commonly used reverse block polyethers.This is because the PEEs structure contains hydrophobic long-chain alkyl groups,which are beneficial for improving anti-foaming performance of aqueous solutions.

关 键 词：水溶性聚醚酯 抗磨 减摩 抗泡性能 高低温稳定性能 

分 类 号：TH117.2[机械工程—机械设计及理论]