writer：Guo ZH, Ye RF, Zhao LP, Ran SY, Fang ZP*, Li J.
keywords：Nano particles; Polymers; Environmental Degradation; Thermogravimetric analysis (TGA); Fullerene
source：期刊
specific source：Composites Science and Technology, 2016.6, 129: 123-129
Issue time：2016年
Fullerene (C₆₀) decorated graphene oxide (GO) , denoted as GO-d-C₆₀, was synthesized through a three-step chemical process, including acylating chlorination of GO, amino-functionalization of GO and addition reaction of C₆₀ molecules with amino groups, with the purpose of promoting the dispersion of GO in high density polyethylene (HDPE) and further improving thermal stability and flame retardancy of HDPE/GO composite. Infrared spectroscopy (IR), transmission electron micrographs (TEM) and X-ray photoelectron spectroscopy (XPS) proved that about 2.3 wt% of C₆₀ molecules, with the size of about 40-70 nm, were bonded onto the surface of GO and mainly located on the edge of GO sheets. The chemical decoration made GO-d-C₆₀ to have better dispersion in HDPE than GO, favoring the formation of compact and integrated char barriers when heated or ignited. Consequently, GO-d-C₆₀ improved the thermal stability and flame retardancy of HDPE more effectively than pristine GO, due to the assembly of the barrier effect of GO and the radical-trapping effect of C₆₀.