Organic-inorganic nanocomposite material and preparation method thereof using aminosilane precursor

PURPOSE: A thermosetting resin composition, a method for preparing an organic-inorganic nanocomposite material by using the composition and an organic-inorganic nanocomposite material prepared by the method are provided, to suppress the shrinkage of a resin and the formation of pores between a resin and an inorganic material, thereby improving the physical properties and dimension stability of an organic-inorganic nanocomposite material. CONSTITUTION: The thermosetting resin composition comprises 100 parts by weight of an organic polymer resin; and 20-30 parts by weight of an aminosilane. Preferably the organic polymer resin is an epoxy resin; and the aminosilane is selected from the group consisting of a dialkylaminosilane, a trialkylaminosilane, a tetraalkylaminosilane, a diarylaminosilane, a triarylaminosilane, a tetraarylaminosilane and their mixtures. The organic-inorganic nanocomposite material is prepared by carrying out sol-gel reaction and curing reaction of the composition simultaneously. Preferably the organic-inorganic nanocomposite material is an epoxy-silica nanocomposite material.