Preparation and properties of nano-SiO2/epoxy composites cured by Mannich Amine

摘要

Nano-SiO2/epoxy composites cured by Mannich Amine (type T-31) were prepared and studied and the results are reported in this paper. The nano-SiO2 was pretreated by a silane coupling agent (type KH-550) and mixed with epoxy resin (type E-51) using an ultrasonic processor. Amounts of filler loading ranged from 1% to 5% of the weight of the epoxy resin. Some properties of the resulting composites were characterized by X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), and thermogravimetric analysis (TGA). The results of tensile tests and impact tests showed that the composite with 3% nano-SiO2 loading presented the best mechanical performances. The tribological performance and thermal stability of the materials were also improved with the addition of nano-SiO2.