酚醛树脂改性对管胞细胞壁力学性能的影响

doi:10.11707/j.1001-7488.20121214

Scientia Silvae Sinicae ›› 2012, Vol. 48 ›› Issue (12): 89-92.doi: 10.11707/j.1001-7488.20121214

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Effect of Phenol-Formaldehyde-Modified on Mechanical Properties of Tracheids Cell Wall

Huang Yanhui¹, Fei Benhua¹, Yu Yan¹, Zhao Rongjun², Wang Xiaoqing²

1. International Center for Bamboo and Rattan Beijing 100102;2. Research Institute of Wood Industry, CAF Beijing 100091

Received:2012-02-13 Revised:2012-03-05 Online:2012-12-25 Published:2012-12-25

Abstract

Abstract:

The mechanical properties of wood-based materials can be improved significantly by the modification of low molecular weight phenol-formaldehyde resin. In this paper, the samples of Chinese fir were treated by low molecular weight phenol-formaldehyde resin, then the cell wall mechanical properties of tracheids of PF treatment and untreated reference samples were tested by the technique of nanoindentation. Compared with untreated reference samples, the increases in the average modules of elasticity of 32.94% and in the average hardness of 32.93% were observed for PF treatment samples. The absorbance of PF treatment samples was higher than the untreated reference samples by the analysis of ultraviolet micro-spectrophotometer. This proves clearly that the low molecular weight phenol-formaldehyde resin was able to diffuse into the nanopores in the S₂ layer of tracheids cell wall of Chinese fir. Thus, the mechanical properties of cell wall could be improved.

Key words: phenol-formaldehyde resin, cell wall, modules of elasticity, hardness, ultraviolet micro-spectrophotometer

CLC Number:

S781.2

Huang Yanhui;Fei Benhua;Yu Yan;Zhao Rongjun;Wang Xiaoqing. Effect of Phenol-Formaldehyde-Modified on Mechanical Properties of Tracheids Cell Wall[J]. Scientia Silvae Sinicae, 2012, 48(12): 89-92.

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Effect of Phenol-Formaldehyde-Modified on Mechanical Properties of Tracheids Cell Wall

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