Study on the Impact of Two Kinds Modification Methods on the Dimensional Stability of Poplar

Abstract:

Fast-growing poplars are used as test materials in this study, which are respectively first carbonized then impregnated treatment and carbonized treatment, to test the dimensional stability of modified wood. The results show: the shrinkage rate of specimen which is first carbonized then impregnated is higher than the control group as much as 87.80% ~ 89.16% in radical direction, 76.20%~82.43% in tangential direction; from oven-dry state to air-dry state, the swelling rate of specimen is higher than the control group as much as 5.26% , 9.09%, and to saturated state, the rate is lower than the control group as 14.55% and 0.13% respectively in radical direction and tangential direction, as a result, the characters of shrinkage and swelling are not improved. When carbonized, the shrinkage rate of specimen is lower than the control group as 3.01%~8.47% and 5.08%~5.86% respectively in radical direction and tangential direction; the swelling rate is lower than control group as 23.84%~41.05% and 12.01%~43.75% respectively in radical direction and tangential direction, as a result, the character of shrinkage is poorly improved but swelling is obviously improved. After the two modified treatments, moisture absorption rate is respectively 6.99% and 4.91%, both lower than the control group8.80%; moisture resistance rate respectively 20.57% and 44.20%; water absorption rate 107.27% and 123.74%, lower than the control group 210%; resistance to water absorption up to 48.92% and 41.08%. Know then, carbonization treatment is better in terms of the affect on improving dimensional stability of wood.

• Periodical: Applied Mechanics and Materials (Volumes 341-342)
• Pages: 42-48
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.341-342.42
• Online since: July 2013
• Authors: Zhi Bo Feng, Guo Zheng Zou, Gang Chen, Jia Bin Cai
• Keywords: Carbonized Treatment, Carbonized Treatment Dimensional Stability, Fast-Growing Poplar, Impregnated Treatment Dimensional Stability

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DOI: 10.1007/s00107-004-0532-8