Abstract
In this study, we designed a new flame retardant to improve the fire safety performance of epoxy resin (EP). Graphitic carbon nitride (g-C3N4) was derived from melamine through a solid-phase reaction, after which nickel ammonium phosphate nanowires (NiNH4PO4·H2O) were grown on the g-C3N4 using a hydrothermal method. The resulting material (g-C3N4/NiNH4PO4·H2O) was a halogen-free flame retardant containing effective flame-retardant elements such as C, N, P, and Ni. Subsequently, g-C3N4/NiNH4PO4·H2O was added to EP to test its fire resistance and mechanical properties. When the amount of g-C3N4/NiNH4PO4·H2O was 5 phr (per hundred resin), the peak of smoke production rate and peak heat release rate of the EP composite were reduced by 35.42 and 70.4 %, respectively, compared to those of pure EP. Meanwhile, the limiting oxygen index of the EP composite was enhanced to 30.0 % from 24.5 % (pure EP). Finally, the flame-retardant mechanisms of the gas phase and condensed phase were explored.
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Acknowledgements
This work was supported by the Beijing Tianjin Hebei collaborative innovation community construction project [grant numbers 20541401D]; the Key research and development projects of Hebei Province [grant numbers 19211205D] and the Post-graduate’s Innovation Fund Project of Hebei University [grant numbers hbu2019ss074].
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Li, J., Wu, W., Meng, W. et al. Nickel Ammonium Phosphate Nanowires Modified g-C3N4 for Improving the Fire Safety of Epoxy Resin. Fibers Polym 22, 2664–2672 (2021). https://doi.org/10.1007/s12221-021-0928-7
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DOI: https://doi.org/10.1007/s12221-021-0928-7