碳纳米管改性丙烯酸聚硅氧烷树脂摩擦学性能

Tribological Properties of Acrylic Polysiloxane Resin Modified by Carbon Nanotubes

采用多壁碳纳米管(MWCNTs)对丙烯酸聚硅氧烷树脂(APR)进行无机纳米材料改性,分析MWCNTs对APR复合涂层摩擦学性能的影响。采用高压无气喷涂的方式制备不同含量的MWCNTs/APR复合涂层,利用摩擦磨损试验机进行摩擦磨损试验,利用扫描电子显微镜(SEM)、白光干涉仪对摩擦试验后的复合涂层进行形貌表征,研究不同含量MWCNTs对复合涂层耐磨损机理的影响。实验结果表明,在室温、载荷5 N、时间5 min、频率1 Hz的摩擦环境下,MWCNTs含量为1.0%时,磨痕宽度与深度达到最低,其值分别为0.606 4 mm、10.966 3μm,与纯APR复合涂层相比,分别降低了17.06%、30.06%;除此以外,磨损率也达到最低,其值为0.939 mm^(3)/(N·m),与纯APR复合涂层相比,降低了33.8%。

The inorganic nanomaterial modification of acrylic polysiloxane resin(APR)was carried out by using multi-walled carbon nanotubes(MWCNTs),and the effect of adding MWCNTs on the tribological properties of APR composite coating was analyzed.MWCNTs/APR composite coatings with different contents were prepared by high-pressure airless spraying,and friction and wear tests were carried out by friction and wear testing machine.The morphology of composite coatings after friction test was characterized by scanning electron microscopy(SEM)and white light interferometer.The effects of the addition and different contents of MWCNTs on the wear resistance mechanism of the composite coating were investigated.The experimental results showed that at room temperature,5 N load,5 min time and 1 Hz frequency,when the content of MWCNTs was 1.0%,the width and depth of the wear marks reached the lowest,which were 0.6064 mm and 10.9663μm,respectively.Compared with pure APR composite coating,it decreased by 17.06%and 30.06%,respectively.At the same time,the wear rate also reached the lowest,0.939 mm^(3)/(N·m),which was 33.8%lower than thatof pureAPRcompositecoating.