High Leach-Resistant Fire-Retardant Modified Pine Wood (Pinus sylvestris L.) by In Situ Phosphorylation and Carbamylation.

ABSTRACT: The exterior application of fire-retardant (FR) timber necessitates it to have high durability because of the possibility to be exposed to rainfall. In this study, water-leaching resistance of FR wood has been imparted by grafting phosphate and carbamate groups of the water-soluble FR additives ammonium dihydrogen phosphate (ADP)/urea onto the hydroxyl groups of wood polymers via vacuum-pressure impregnation, followed by drying/heating in hot air. A darker and more reddish wood surface was observed after the modification. Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, solid-state ¹³C cross-polarization magic-angle-spinning nuclear magnetic resonance (¹³C CP-MAS NMR), and direct-excitation ³¹P MAS NMR suggested the formation of C-

SUBMITTER: Lin CF 

PROVIDER: S-EPMC10061617 | biostudies-literature | 2023 Mar

REPOSITORIES: biostudies-literature