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利用纳米粉末橡胶结合无机纳米氧化铝以改善环氧树脂的表面强度性能和摩擦性能.采用差示扫描量热法(DSC,Differential Scanning Calorimeter)研究了纳米改性环氧树脂的固化反应动力学;采用动态超微硬度表征了纳米复合材料的表面强度;评价了纳米改性环氧树脂复合材料的摩擦系数.结果表明,纳米复合材料与环氧树脂具有相同的固化反应机理,单一纳米粒子的加入降低了固化反应的表观活化能,两种纳米粒子的复配使用增加了固化反应的表观活化能.纳米粒子使固化反应程度下降,导致固化反应热显著下降.复配使用纳米氧化铝和纳米粉末橡胶能够改善环氧树脂复合材料的摩擦系数、表面硬度和弹性模量,实现了对表面强度性能和摩擦性能的优化.
Nano-powder rubber and inorganic nano-alumina were used to improve the surface strength and friction properties of epoxy resin.The curing reaction kinetics of nano-modified epoxy resin was studied by differential scanning calorimeter (DSC) The dynamic superfine hardness was used to characterize the surface strength of the nanocomposites and the friction coefficient of the nanocomposites was evaluated. The results show that the nanocomposites have the same curing reaction mechanism with the epoxy resin. The addition of a single nanoparticle The apparent activation energy of the curing reaction is decreased, and the complex activation of the two kinds of nanoparticles increases the apparent activation energy of the curing reaction, the degree of the curing reaction decreases due to the nanoparticles, and the curing reaction heat decreases remarkably. The nano-alumina Nano-powder rubber can improve the friction coefficient, surface hardness and elastic modulus of epoxy resin composites, and optimize the surface strength and friction properties.