摘要
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.
The surface strength and tribological properties of epoxy resin were modified with addition of a- lumina nano-particles and rubber nano-powders. The curing kinetics and the surface strength properties of ep- oxy nanocomposites were investigated by differential scanning calorimeter （DSC） and dynamic ultra-micro hardness tester, respectively. The friction coefficient of the composites was evaluated. The results reveal the same curing mechanism of nanocomposites as epoxy resin by showing the similar reaction order. The activation energy of nanocomposites with single kind of nano-particles was decreased while the one with mixed nano-parti- cles was increased. The curing heat was decreased due to the suppressed curing degree by nanoparticles. The surface hardness and the elastic modulus were improved, as well as the creep-resistant and deformation-resist- ant properties. Conclusively, the surface strength properties and friction coefficient of epoxy composites were improved with addition of mixed nano-particles.
出处
《北京航空航天大学学报》
EI
CAS
CSCD
北大核心
2013年第4期512-516,共5页
Journal of Beijing University of Aeronautics and Astronautics
基金
哈尔滨市科技创新人才研究专项资金资助项目(2011RFQXG018)
黑龙江省科技攻关计划资助项目(GZ11A401)
黑龙江省教育厅科学技术研究资助项目(12521462)
