纳米氧化铝/二硫化钼协同增强EP复合材料的摩擦磨损性能

Nano-alumina/Molybdenum Disulfide Synergistic Enhancement of Friction and Wear Properties of Epoxy Resin Composites

将改性处理后的纳米氧化铝(nano-Al_(2)O_(3))和二硫化钼(MoS_(2))作为填料加入到环氧树脂(EP)中,制备不同配比的nano-Al_(2)O_(3)/MoS_(2)/EP复合材料。通过扫描电镜、差示扫描热量计、傅里叶变换红外光谱仪、维氏硬度计、磨耗仪、摩擦磨损试验机对复合材料的微观形貌、固化工艺、硬度及耐磨性进行研究。结果表明,EP体系采用70℃/2 h+90℃/1 h+110℃/2 h的阶梯固化温度。nano-Al_(2)O_(3)成功地被硅烷偶联剂改性并参与到EP的固化反应当中。当nano-Al_(2)O_(3)添加量为3 phr、MoS_(2)添加量为20 phr时,复合材料的维氏硬度为21.5、磨损量为540 mg、摩擦系数为0.14,与纯EP相比,分别提高了58%、57%、74%。nano-Al_(2)O_(3)和MoS_(2)分散在EP基体当中,提高了EP的力学性能。

The modified nano-alumina and molybdenum disulfide were added to the epoxy resin as fillers to prepare nano-alumina/molybdenum disulfide/epoxy resin composites with different proportions.The micromorphology,curing process,hardness and wear resistance of composite materials were studied by scanning electron microscopy,differential scanning calorimeter,Fourier transform infrared spectrometer,Vickers hardness tester,wear tester and friction and wear testing machine.The experimental results show that the epoxy resin system adopts a step curing temperature of 70 °C/2 h+90 °C/1 h+110 °C/2 h.Nano alumina is successfully modified by silane coupling agent and participates in the curing reaction of epoxy resin.When the addition amount of nano-alumina is 3 phr and the amount of molybdenum disulfide is 20 phr,the hardness of the composite material is 21.5 HV,the wear amount is 540 mg,and the friction coefficient is 0.14,which are improved by 58%,57%and 74%comparing with pure epoxy resin,respectively.Nano alumina and molybdenum disulfide are dispersed in the epoxy resin matrix,which improves the mechanical properties of epoxy resin.