The influences of GO-SHS hybrids on the mechanical and dielectric properties of EP composites

Graphene oxide (GO) was prepared by improved Hummer's method and silica hollow sphere (SHS) was fabricated by improved template method. The GO-SHS hybrids were prepared by modified SHS attached to modified GO surface, following which the GO-SHS hybrids were introduced into the epoxy resin (EP) matrix to synthesize GO-SHS/EP composites. The results showed that the mechanical and dielectric properties of GO-SHS/EP composites were enhanced. With the content of 0.3 wt.% GO-3 wt.% SHS, the GO-SHS/EP composites achieved impact and flexural strengths of 23.4 kJ/m 2 and 148.4 MPa, respectively, which improved 369% and 72%, respectively, compared with pure EP. At 10 3  Hz, the dielectric constant of GO-SHS composite is 3.17, which is significantly lower compared to 3.79 for pure EP. This will provide an opportunity to expand the application of epoxy composites in electronic packaging.