AUTHOR=Kong Qinghong , Zhang Caijiao , Zheng Guolin , Zhang Manman , Zhou Tao , Zhang Junhao 

TITLE=Effect of Graphene Oxide–Modified Cobalt Nickel Phosphate on Flame Retardancy of Epoxy Resin

JOURNAL=Frontiers in Materials

VOLUME=7

YEAR=2020

URL=https://www.frontiersin.org/journals/materials/articles/10.3389/fmats.2020.588518

DOI=10.3389/fmats.2020.588518

ISSN=2296-8016

ABSTRACT=<p>Synergistic effect is an effective strategy for improving the flame retardancy of epoxy resin (EP). In this work, a novel graphene oxide–cobalt nickel phosphate (GO-NiCoPO<sub>3</sub>) is successfully synthesized, which is incorporated into an EP matrix for preparing EP/GO-NiCoPO<sub>3</sub> nanocomposites. The results show that the limiting oxygen index value of EP/4GO-NiCoPO<sub>3</sub> nanocomposites is as high as 30.3%, and UL-94 can reach V-1 rating. The results of micro-combustion calorimetry indicate that the total heat release value and peak of heat release rate of EP/8GO-NiCoPO<sub>3</sub> nanocomposites are decreased by 41.9 and 23.8% compared with those of pure EP. This is mainly due to the synergistic barrier effect of GO and NiCoPO<sub>3</sub>, which together have their own advantages. Meanwhile, EP/GO-NiCoPO<sub>3</sub> nanocomposites can form a dense char layer during the burning process and improve the thermal stability of EP/GO-NiCoPO<sub>3</sub> nanocomposites.</p>