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Nanomaterials 2017, 7(9), 259; doi:10.3390/nano7090259

Hypophosphite/Graphitic Carbon Nitride Hybrids: Preparation and Flame-Retardant Application in Thermoplastic Polyurethane

1
College of Environment and Resources, Fuzhou University, 2 Xueyuan Road, Fuzhou 350116, China
2
College of Civil Engineering, Fuzhou University, 2 Xueyuan Road, Fuzhou 350116, China
3
College of Environment and Safety Engineering, Qingdao University of Science and Technology, 53 Zhenzhou Road, Qingdao 266042, China
4
College of Materials Science and Engineering, Fuzhou University, 2 Xueyuan Road, Fuzhou 350116, China
5
State Key Laboratory of Fire Science, University of Science and Technology of China, 96 Jinzhai Road, Hefei 230026, China
*
Authors to whom correspondence should be addressed.
Received: 13 August 2017 / Revised: 29 August 2017 / Accepted: 30 August 2017 / Published: 5 September 2017
(This article belongs to the Special Issue Graphitic Carbon Nitride Nanostructures: Catalysis and Beyond)
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Abstract

A series of aluminum hypophosphite (AHPi)/graphite-like carbon nitride (g-C3N4) (designated as CAHPi) hybrids were prepared, followed by incorporation into thermoplastic polyurethane (TPU). The introduction of CAHPi hybrids into TPU led to a marked reduction in the peak of the heat release rate (pHRR), total heat release, weight loss rate, smoke production rate and total smoke production (TSP). For instance, pHRR and TSP decreased by 40% and 50% for TPU/CAHPi20. Furthermore, the increasing fire growth index and decreasing fire performance index were obtained for TPU/CAHPi systems, suggesting reduced fire hazards. It was found that improved fire safety of TPU nanocomposites was contributed by condensed phase and gas phase mechanisms. On one hand, g-C3N4 accelerated the thermal decomposition of AHPi for the formation of more char layers. On the other hand, g-C3N4 induced AHPi to generate more free radical capture agents when exposed to flame, besides protecting AHPi against thermal oxidation. View Full-Text
Keywords: graphitic carbon nitride; inorganic compounds; flame retardancy; smoke suppression; mechanisms graphitic carbon nitride; inorganic compounds; flame retardancy; smoke suppression; mechanisms
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Shi, Y.; Fu, L.; Chen, X.; Guo, J.; Yang, F.; Wang, J.; Zheng, Y.; Hu, Y. Hypophosphite/Graphitic Carbon Nitride Hybrids: Preparation and Flame-Retardant Application in Thermoplastic Polyurethane. Nanomaterials 2017, 7, 259.

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