EPOXY NANOCOMPOSITE REINFORCED WITH GRAPHENE OXIDE DECORATED WITH NANODIAMOND NANOCLUSTER AND METHOD FOR MANUFACTURING THEREOF

摘要

The present invention is to provide an epoxy composite material with enhanced mechanical strength. In particular, a synthesized surface-modified graphene oxide and nanodiamond are mixed and ultrasonically treated in ethanol, thereby yielding a stable dispersant; the dispersant is reacted at 60 °C and filtered, thereby producing a graphene oxide/nanodiamond composite; and the graphene oxide/nanodiamond composite is mixed with an epoxy and a hardener. More specifically, the present invention provides a method of preparing an epoxy composite material enhanced with a nanodiamond nanocluster-incorporated graphene oxide, the method comprising: (1) oxidizing graphite by using a strong acid and an oxidizing agent, thereby synthesizing graphene oxide; (2) modifying the surface of the graphene oxide thus produced; (3) modifying the surface of nanodiamond; (4) mixing the surface-modified graphene oxide and nanodiamond thus prepared to produce a nanodiamond nanocluster-incorporated graphene oxide composite filler; and (5) mixing the nanodiamond nanocluster-incorporated graphene oxide composite filler with an epoxy and a hardener. According to the present invention, by adding GN to an epoxy resin as a filler, an epoxy composite material with enhanced mechanical properties can be produced with even a small amount of a GN filler as compared to an existing epoxy composite material enhanced with graphene oxide.