This invention is attributed to the technology of nano-composite materials and specifically relates to a method to prepare nano-sized silicon dioxide/boron phenolic resin nano-composite materials. In this method, solution blending and ultrasonic wave-aided dispersion are combined so as to ensure nano-sized dispersion of the nano-particles in composite materials. The nano-sized silicon dioxide is surface treated so as form good interfaces with boron phenolic resin matrix and to adequately take advantages of nano-sized silicon dioxide and boron phenolic resin. This invention aims at preparing boron phenolic resin nano-composites with different nano-sized silicon dioxide content by reasonable technique control. The rigidity, wear resistance and thermo-chemical stability of nano-sized silicon dioxide and good mechanical properties, thermo resistance and ablation resistance of boron-modified phenolic resin are utilized, and therefore the prepared nano-sized silicon dioxide/boron phenolic resin nano-composite materials can be widely used in high-temperature abrasion materials, ablation resistant materials, special structural materials and thermo resistant materials. |