The effect of nanoparticles on the adhesion of epoxy adhesive

• DOI: 10.1016/j.matlet.2006.02.038
• Publication Date: 2006-03-04T07:24:18Z
• Authors: Lanlan Zhai; Guoping Ling; Jian Li; Youwen Wang
• Keywords: 0203 mechanical engineering; 02 engineering and technology

In this investigation, the influence of different nanoparticles and surface roughness on the adhesion between epoxy adhesive and steel substrate was primarily investigated. The results of pull-off adhesion tests indicated that nano-Al 2 O 3 of the three kinds of nanoparticles had the most influence on adhesion strength, which was the optimal additive for the epoxy adhesive to improve the adhesion strength. Also, it was found that modified by 2% nano-Al 2 O 3 , the strength multiplication on the surface abraded with silicon carbide paper of 150 grits (150#) was the highest, of three different surface roughness. So, as the results showed that modified by 2% nano-Al 2 O 3 , the adhesion strength of epoxy adhesive on the surface abraded with 150# was visibly improved by about 5 times. Transmission electron microscope (TEM) displayed nano-Al 2 O 3 homogeneously dispersed in epoxy adhesive. Field emission scanning electronic microscope (FE-SEM) revealed that the surface morphology of steel well coincided with that of epoxy adhesive.