作者：Sun FC, Fu JH, Peng YX, Jiao XM, Liu H, Du FP, Zhang YF*
关键字：Water-based coatings, Plywood, SIPN, Intumescent fire-retardant
论文来源：期刊
具体来源：Progress in Organic Coatings
发表时间：2021年

Water-based fire-retardant coatings for wood are non-toxic, aesthetically pleasing, and can provide appreciable fire retardancy  properties.  However,  excessive  fire-retardant content  and  simple  fire-retardant function  limit their practical application. In this work, a semi-interpenetrating network (SIPN) technique was used to prepare a semi-transparent dual-functional, intumescent fire-retardant/self-healing water-based coating for plywood. The coatings  comprised  ammonium  polyphosphate  (APP)  as  a  source  of  acid  source  and  gas  source;  poly  (vinyl alcohol) (PVA) as the carbon source and self-healing agent; and sodium silicate and sodium fluorosilicate (SS) as precursors for forming an integral inorganic network. Our semi-transparent coatings demonstrated excellent fire retardancy thanks to the interplay between the inorganic silicate network and the intumescent fire-retardant system.  Remarkable self-healing properties  were provided  by the dynamic hydrogen bonding interaction  be-tween PVA molecular chains, where significant scratches were healed after exposure to water vapor. The PVA/SSA coating enhanced the fire retardancy of plywood, which was shown to be directly related to the APP content. The combination of semi-transparent, fire-retardant and self-healing capabilities underlines the potential of our PVA/SSA coatings for protecting and safeguarding wooden products.