Surface Modification of Al₂O₃ Fine Powders and Application in Epoxy Resin

Abstract

In this paper the surfaces of Al2O3 fine powders with average size of 500nm were modified by heterogeneous azeotropic distillation process. IR spectrums of the powders show that the distillation can effectively dehydrate hydrous Al2O3 powders, and succeed in substituting the hydrate water with butanol molecular. The dispersion of Al2O3 powders in epoxy resin is improved remarkably, which is observed by means of SEM. Experimental results show that abrasion property of the resin filled with modified Al2O3 powders is improved.

Crystal nucleation and growth in poly(ethylene terephthalate)/alumina‐nanoparticle composites

“…Inorganic nanoparticles tend to possess high surface energies, which often cause micron‐size aggregates of the nanoparticles to form in a polymer matrix 20–22. Hence, most previous studies in the literature exploring the effect of nanoparticles on polymer crystallization have utilized nanoparticles with functionalized surfaces that prevent their agglomeration 23, 24. However, modifying the nanoparticle surface also affects the mobility of the polymer chains in contact with them and, hence, their crystallization behavior.…”