摘要
对纳米SiO2进行表面修饰获得了稳定的悬浮液,将改性纳米SiO2以溶液共混法加入到胶粘剂中,制备出一种室温快速固化纳米环氧胶粘剂.透射电子显微镜下可观察到,经表面活性剂改性后的纳米SiO2比较均匀地分散在环氧胶粘剂中,粒径约为30nm,提高了胶粘剂剪切强度值.利用扫描电子显微镜观察了固化物断口形貌,发现当基体受到冲击时,纳米粒子与基体之间产生大量银纹,消耗了大量能量,起到了增韧增强的作用.此外,分析并讨论了纳米SiO2对胶粘剂的力学性能影响.
Based on the liquor-mix method, the steady suspension is obtained through nano-SiO2 surface modification and adhesive compounding. In so doing, a room-temperature fast-curing nano-SiO2/epoxy resin adhesive is generated. Observed by a transmission electron microscope(TEM), the nano-SiO2, which is modified by surfactants, is homogeneously dispersed in adhesive with particle size round 30 nm. In this vein, the adhesive possesses high shear strength. When the base is collided pertaining to the fracture surface, a large number of micro-cracks are generated; whereas a large amount of energy is consumed. Accordingly, the adhesive elasticity is enhanced. Finally, the adhesive mechanical property is elaborated with regard to the nano-SiO2.
出处
《中国工程机械学报》
2006年第4期486-489,共4页
Chinese Journal of Construction Machinery
基金
装备再制造技术国防科技重点实验室预研基金资助项目(9140C85040106JS9104)
