Abstract: The PEDOT-modified thermoelectric graphene nanosheets (TEG) and adhesive (P(DPOP-Si)) are used as the raw materials to construct fire-retardant nano-coating with fire warning function on the surface of wood by the method of “coating-drying”, to study its fire warning performance and fire-retardant properties and to explore the fire-retardant warning mechanism of the coated wood. The objective of this study is to provide wood with efficient flame retardant properties and early fire warning function at low loading, so as to expand the application fields of wood and wood products. The results showed that the coated wood (WOOD-3) achieved a limiting oxygen index of 37.9%, and the peak heat release rate and total heat release were reduced by 49.3% and 47.3%, respectively, compared with pure wood. In case of fire, the nano-coating triggers the fire alarm within 7 s, which has both better fire warning performance and certain flame retardant properties.

Key words: graphene oxide, fire warning, flame retardant, functional coating