Abstract
Stringent fire safety regulations have limited the use of green biocomposites in practical applications due to vulnerability of their constituents to heat and fire. To counter this weakness, several flame-retardant treatments and techniques have been introduced, such as halogenated and non-halogenated flame-retardants, nano fillers, layered silicates, copolymerization, grafting, and synergistic use of natural fibre and fire retardant. While the physical and chemical treatment of green biocomposites has improved their heat resistance to some extent, these materials still fail to comply with strict fire safety regulations such as the Federal Motor Vehicle Safety Standard No. 302 (FMVSS 302) and the code of Federal Aviation Regulation 25.853 applicable in the automotive and aerospace industry, respectively. Therefore, an in-depth study of thermal decomposition and fire behaviour of green biocomposites is inevitable to improve flame retardancy techniques, to discover flame-retardants that are more suitable and environment friendly, and to select appropriate natural fibres and biopolymers to develop fire safe biocomposite products. This article analyses the research done in the last decades for improving the thermal behaviour and fire resistance of green materials as well as the efficient synergistic techniques and fire retardant treatments to counter this vulnerability.
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