酚醛改性环氧树脂交联结构对涂层摩擦磨损性能的影响  

Effect of Cross-linked Structure on Mechanical and Tribological Properties of Phenolic Modified Epoxy Coatings

作　　者：严兴兴 陈磊 徐海燕[2] 崔海霞[2] 雷自强[1] 张岳[2] YAN Xing-xing;CHEN Lei;XU Hai-yan;CUI Hai-xia;LEI Zi-qiang;ZHANG Yue(College of Chemistry and Chemical Engineering,Northwest Normal University,Lanzhou 730070,China;State Key Laboratory of Solid Lubrication,Lanzhou Institute of Chemical Physics,Chinese Academy of Sciences,Lanzhou 730000,China)

机构地区：[1]西北师范大学化学化工学院,兰州730070 [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,兰州730000

出　　处：《表面技术》2023年第2期206-214,共9页Surface Technology

基　　金：国家自然科学基金(52105228)。

摘　　要：目的从应力的角度探究树脂交联结构与所制备涂层摩擦磨损性能之间的关系。方法以不同环氧树脂/硼酚醛树脂(EP/BPF)的配比制备了不同交联密度的固化物试样。通过热力学性能测试,获取储能模量和玻璃化转变温度,计算得到树脂交联结构参数。通过往复式摩擦试验机和三维轮廓仪测试,确定树脂涂层的摩擦磨损性能。通过力学性能测试,获取树脂材料的应力应变测试曲线,进一步计算出了树脂材料的弹性模量和抗张强度。通过有限元数值模拟计算,获取了树脂涂层的应力大小和分布。结果随着硼酚醛改性环氧树脂交联密度的增大,树脂材料的弹性模量、抗张强度先增大后减小,其中弹性模量最大值为1572 MPa,但树脂涂层的磨损率呈现相反趋势。有限元模拟计算结果显示,随交联密度的增大,涂层的应力变化不明显(33.7~47 MPa),但是应力裕度先增大后减小(0.04~1.07)。结论改性环氧树脂涂层的应力裕度和磨损率成负相关,通过调控树脂交联密度可有效调节涂层的应力裕度,从而控制涂层的摩擦磨损性能。文中硼酚醛改性环氧树脂的交联密度为936 mol/m^(3)时,涂层的应力裕度最大,抗磨损性能最佳。In this paper,cured samples with different crosslink densities was prepared by epoxy resin/boron resin(EP/BPF),at the same time,the relationship between the cross-linked structure and the friction and wear properties of the prepared coatings was investigated from the perspective of stress.The thermomechanical properties were tested to obtain the energy storage modulus and glass transition temperature,and the resin cross-linked structure parameters were also calculated based on the crosslink density calculation equation;The friction coefficient and wear rate of the coatings were tested by a reciprocating friction tester and a three-dimensional profiler.It was found that the elastic modulus and tensile strength of the resin material increased and then decreased as the crosslink density of the boron phenolic modified epoxy resin increased,with the maximum elastic modulus being 1572 MPa.It was found by finite element simulation that the stress of the coating did not change significantly(33.7-47 MPa)under the same load,but it showed a pattern of increasing and then decreasing with the increase of the crosslink density.Further calculations showed that the stress margin of the coating also showed an increase and then decrease with the increase of the crosslink density(0.04-1.07).In addition,the finite element simulation results and the mechanical property test results of the coating show that the wear rate of the coating is negatively correlated with the stress margin,namely the stress margin of the coating increases and then decreases as the crosslink density of the resin increases,while the wear of the coating decreases and then increases.Among them,the stress margin of the coating is the largest and the wear resistance is the best when the crosslink density of the boron phenolic modified epoxy resin is 936 mol/m^(3).Therefore,by adjusting the crosslink density of the resin system,the mechanical strength of the resin can be effectively regulated,thus achieving optimization of the friction and wear properties of the co

关 键 词：环氧树脂 硼酚醛 交联密度 应力 磨损 

分 类 号：TH117[机械工程—机械设计及理论]