Study on the transverse alkali impregnating diffusion of poplar

doi:10.3969/j.issn.1000-2006.2014.01.018

JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2014, Vol. 38 ›› Issue (01): 103-109.doi: 10.3969/j.issn.1000-2006.2014.01.018

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Study on the transverse alkali impregnating diffusion of poplar

WANG Yonggui, YUE Jinquan^*

Key Laboratory of Bio-based Material Science and Technology of Ministry of Education, Northeast Forestry University, Harbin 150040, China

Online:2014-01-15 Published:2014-01-15

Abstract

Abstract: The transverse alkali impregnating diffusion of poplar was studied with the self-made equipment. According to the scanning electron microscopy(SEM)analysis of the microstructure of raw material, impregnating diffusion performance of sapwood was better than the performance of heartwood. It was showed that there were three stages in the process of the transverse alkali impregnating diffusion of poplar, namely reaction-driven stage, reaction and diffusion coexistence stage and diffusion-driven stage. Meantime, the effects of main factors, which included temperature, concentration of NaOH, thickness of sample and moisture of sample, were investigated. The results showed that temperature and thickness of sample had significant effects on the alkali impregnating diffusion process. While, the concentration of NaOH influenced the inflection point mainly which had close link with reaction rate in the impregnating process. The moisture of sample had not remarkable influence on the process. But the inflection point value of water saturated sample was higher than that of water unsaturated samples in the moisture factor experiment.

CLC Number:

S781

WANG Yonggui, YUE Jinquan. Study on the transverse alkali impregnating diffusion of poplar[J]. JOURNAL OF NANJING FORESTRY UNIVERSITY, 2014, 38(01): 103-109.

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Study on the transverse alkali impregnating diffusion of poplar

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