自润滑微胶囊的制备及其聚酰亚胺复合涂层的摩擦学性能  

Preparation of self-lubricating microcapsules and tribological properties of their polyimide composite coatings

作　　者：刘超[1,2] 李茜 刘锐 薛新 祝茜 鲍艳 张文博 LIU Chao;LI Xi;LIU Rui;XUE Xin;ZHU Qian;BAO Yan;ZHANG Wen-bo(Shaanxi Collaborative Innovation Center of Industrial Auxiliary Chemistry&Technology,Shaanxi University of Science&Technology,Xi'an 710021,China;College of Chemistry and Chemical Engineering,Shaanxi University of Science&Technology,Xi'an 710021,China;College of Bioresources Chemical and Materials Engineering,Shaanxi University of Science&Technology,Xi'an 710021,China)

机构地区：[1]陕西科技大学陕西省轻化工助剂化学与技术协同创新中心,陕西西安710021 [2]陕西科技大学化学与化工学院,陕西西安710021 [3]陕西科技大学轻工科学与工程学院,陕西西安710021

出　　处：《陕西科技大学学报》2021年第5期69-74,共6页Journal of Shaanxi University of Science & Technology

基　　金：国家自然科学基金项目(22008145);中国博士后科学基金项目(2021M692861);陕西高校新型智库(陕西科技大学化工助剂与新材料发展研究中心)开放基金项目(ACNM-202110);陕西省教育厅专项科研计划项目(19JK0150)

摘　　要：以溶剂挥发法制备了以氧化石墨烯(GO)和聚亚苯基砜(PPSU)为壁材,1-(1-氨基乙基)-3-甲基咪唑溴盐离子液体(IL)为芯材的固-液复合润滑微胶囊(GPILM).并将GPILM引入到聚酰亚胺树脂(PI)中,制得GPILM/PI复合涂层.重点研究了GPILM引入量对其PI复合涂层摩擦学性能的影响.结果表明:GPILM微胶囊成功制备且粒径约为(45±15)μm.GPILM的引入,能够有效降低PI涂层的摩擦系数和体积磨损率.当GPILM添加量仅为5 wt%时,其复合涂层的摩擦系数(0.21)和体积磨损率(1.2×10^(-6) mm^(3)/(N·m))与PI涂层相比,分别降低了27.6%和78.1%.这主要是GPILM独特的微胶囊结构不仅可有效发挥GO和IL的固-液协同润滑作用,而且其在PI基体中良好的分散,能有效提高其复合涂层的耐磨性.该类结构的复合微胶囊,有望在无油润滑领域发挥重要的应用价值.In this paper,solid-liquid composite lubricated microcapsules(GPILM)were prepared by solvent volatilization method with graphene oxide(GO)and polyphenylsulfone(PPSU)as wall materials and 1-(1-aminoethyl)-3-methylimidazolium bromide ionic liquid(IL)as core materials.And GPILM was introduced into polyimide resin(PI)to prepare GPILM/PI composite coating.The focus is on the influence of the amount of GPILM introduced on the tribological properties of PI composite coatings.The results showed that GPILM microcapsules were successfully prepared and the particle size was about(45±15)μm.The introduction of GPILM can effectively reduce the friction coefficient and volumetric wear rate of PI coating.When the GPILM addition amount is only 5 wt%,the friction coefficient(0.21)and volume wear rate(1.2×10^(-6) mm^(3)/(N·m))of the composite coating are reduced by 27.6%and 78.1%compared with the PI coating.This is mainly because the unique microcapsule structure of GPILM can not only effectively exert the solid-liquid synergistic lubrication effect of GO and IL,but also its good dispersion in PI matrix can effectively improve the wear resistance of its composite coating.The composite microcapsules with this kind of structure are expected to play an important role in the field of oil-free lubrication.

关 键 词：自润滑 微胶囊 氧化石墨烯 复合材料 摩擦学性能 

分 类 号：TB332[一般工业技术—材料科学与工程]