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Abstract
N-methyl amino catechol borate (1), N-methyl amino-4-methyl catechol borate (2), N-methyl amino-4-t-butyl catechol borate (3), and N-methyl amino-2, 3-naphthyl borate (4) were synthesized by reflux of boric acid with a diol in solvent N,N-dimethyl formamide. The aminoborates were characterized by proton nuclear magnetic resonance spectroscopy, FTIR spectroscopy and elemental analysis. Wood impregnated with aminoborate 1, 3, or 4 after 2-wk water leaching was able to prevent decay by a brown-and white-rot fungus. Thermogravimetric analysis showed that wood impregnated with aminoborate 1 or 4 had a high char yield. DSC showed that the pyrolysis pathway of wood treated with aminoborates proceeds by depolymerization of cellulose. Chars formed from wood impregnated with aminoborates were more stable to thermal degradation than the control.
Keywords
Aminoborates,
fungal decay,
thermal protection,
synthesis,
wood,
fireproofing agents,
thermogravimetry,
fireproofing of wood,
pyrolysis,
leaching,
brown rot,
nuclear magnetic resonance,
char,
biodegradation,
borates,
thermal properties,
boric acid,
wood-destroying fungi,
preservation,
thermal analysis,
Fourier transform infrared spectroscopy,
fire retardants,
fire resistance,
white rot,
thermal degradation,
wood decay,
impregnation
Citation
Chen, George C. 2008. Synthesis and evaluation of aminoborates derived from boric acid and diols for protecting wood against fungal and thermal degradation. Wood and Fiber Science. 40(2): 248-257.
