Wood, a flammable material, poses safety risks due to heat and smoke release during combustion and is a huge safety hazard. The current approach involves impregnating water-soluble inorganic flame retardants into wood. However, these retardants are susceptible to leaching, negatively impacting the aesthetic appearance and flame retardancy of wood. Herein, a liquid mix of ammonium dihydrogen phosphate, boric acid, and magnesium chloride was vacuum-pressure impregnated into wood. Subsequent concentration and drying produced composite salt particles (named as P-B-Mg). The wood was immersed in sod...
