Difference of hygroscopic expansion between poplar veneer and bamboo strip under the hygrothermal environment

GUAN Mingjie, HONG Bin, CAI Zhiyong, ZHU Yixin, ZHANG Qisheng

JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2010, Vol. 34 ›› Issue (01) : 91-95.

南京林业大学学报（自然科学版）
JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2010, Vol. 34 ›› Issue (01) : 91-95. DOI: 10.3969/j.jssn.1000-2006.2010.01.019

Difference of hygroscopic expansion between poplar veneer and bamboo strip under the hygrothermal environment

  • GUAN Mingjie1, HONG Bin1, CAI Zhiyong2, ZHU Yixin1, ZHANG Qisheng1
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Abstract

To understand the hygroscopic coefficient different on the bamboo and poplar, the hygroscopic coefficient of Moso bamboo strip and poplar veneer in different humidity process were tested by the resistant strain sheet. The results showed that the hygroscopic expansion coefficients of poplar in longitudinal and transverse dimension are more than 2 times those of bamboo in the period of dehumidifying. Bamboo displayed an obvious lag response to environmental temperature and relative humidity change compared with poplar veneer. The warp of poplarbamboo laminated in longitudinal dimension mainly depended on poplar’s deformation. During the dehumidity process, the warp will be made from bamboo surface to the poplar back, and high humidity treatment will make the warp from poplar back to bamboo surface under the difference between hygroscopic expansion coefficient and lag response to humidity.

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GUAN Mingjie, HONG Bin, CAI Zhiyong, ZHU Yixin, ZHANG Qisheng. Difference of hygroscopic expansion between poplar veneer and bamboo strip under the hygrothermal environment[J]. JOURNAL OF NANJING FORESTRY UNIVERSITY. 2010, 34(01): 91-95 https://doi.org/10.3969/j.jssn.1000-2006.2010.01.019

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