Journal
POLYMERS
Volume 13, Issue 21, Pages -Publisher
MDPI
DOI: 10.3390/polym13213857
Keywords
graphene oxide; polysilicone; functionalization; flame retardancy; epoxy resin
Categories
Funding
- Ningbo Natural Science Foundation [2019A610032]
- Open Fund of Shanghai Key Laboratory of Multiphase Materials Chemical Engineering
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A novel polysilicone flame retardant (PMDA) was synthesized and grafted onto the surfaces of graphene oxide (GO), improving the thermal stability and flame retardancy of the epoxy resin (EP) matrix. The application of GO-PMDA in EP significantly reduced heat release and enhanced flame retardancy.
A novel polysilicone flame retardant (PMDA) has been synthesized and covalently grafted onto the surfaces of graphene oxide (GO) to obtain GO-PMDA. The chemical structure and morphology of GO-PMDA was characterized and confirmed by the Fourier transform infrared (FTIR) spectroscopy, X-ray photoelectron spectrometer (XPS), atomic force microscope (AFM), and thermogravimetric analysis (TGA). The results of dynamic mechanical analysis (DMA) indicated that the grafting of PMDA improved the dispersion and solubility of GO sheets in the epoxy resin (EP) matrix. The TGA and cone calorimeter measurements showed that compared with the GO, GO-PMDA could significantly improve the thermal stability and flame retardancy of EP. In comparison to pure EP, the peak heat release rate (pHRR) and total heat release (THR) of EP/GO-PMDA were reduced by 30.5% and 10.0% respectively. This greatly enhanced the flame retardancy of EP which was mainly attributed to the synergistic effect of GO-PMDA. Polysilicone can create a stable silica layer on the char surface of EP, which reinforces the barrier effect of graphene.
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