STUDY ON DECAY RESISTANCE OF OIL HEAT-TREATED WOOD WITH CELLULOSE CONTENTS TESTED BY FOURIER INFRARED SPECTRUM ANALYSIS

摘要

The wood decay is mainly due to the wood including the nutrients that the wood decay bacteria needed, such as cellulose, hemi-cellulose and lignin. The proportion of these nutrients has a direct impact on the wood decay resistance. In this paper, by using FTIR spectroscopy was analysed the change of the cellulose content in the wood before and after the oil bath and was studied how the change of fibre content influenced on the wood decay resistance. The results show that: after dealing by the long time high temperature oil bath, the cellulose content of poplar declines from 47.31297 to 32.79843%, and the weightlessness rate of poplar also declines from 19.4 to 4.99% after the corrosion test. The cellulose content in Mongolia Seoteh Pine declines from 44.02291 to 36.65213% and the weightlessness rate declines from 8.21 to 3.14% after the corrosion test, and the effect of the high temperature oil bath on broadleaf wood decay resistance performance is higher than that of needless wood. The long-time high temperature oil bath can efficiently change the internal structure of wood and reduce the nutrients that the wood decay bacteria needed and improve the decay resistance performance of wood efficiently.