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Propensity for flame burning of wood and the coated samples: (a1,a2) original wood; (b1,b2) chitosan-coated sample; (c1,c2) chitosan sodium phytate-coated sample; (d1,d2) chitosan/sodium phytate/nano-ZnO-coated sample; (e1,e2) chitosan/sodium phytate/nano-TiO2-coated sample; (f1,f2) chitosan/sodium phytate/nano-TiO2-ZnO-coated sample. Reprinted from [57] under CC BY 4.0 license.
