Study on the Changing Law of Poplar Color Under the Synergistic Effect of Water and Heat
Taking poplar wood powder as the research object,heat treatment and hydrothermal treatment were carried out at different tempera-tures and times to explore the changes in color of poplar wood under temperature and time.By comparing the differences in color changes be-tween hydrothermal treatment and heat treatment,the role of moisture in this process was explored.Finally,infrared spectroscopy was used to investigate the microscopic changes in the chemical components of poplar wood during this process.The results showed that the effects of heat treatment and hydrothermal treatment on color were roughly the same,both of which deepened the color of wood.However,due to the presence of water,the color of poplar wood treated with hydrothermal treatment was darker under the same treatment conditions;according to the infrared spectrum,during the hydrothermal treatment process,some chemical bonds in the chemical components of poplar wood are broken,forming new conjugated structures and causing the color of poplar wood to darken.
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