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增强-染色复合改性杨木的强度和耐光色牢度(PDF)

《南京林业大学学报(自然科学版)》[ISSN:1000-2006/CN:32-1161/S]

Issue:
2017年05期
Page:
147-151
Column:
研究论文
publishdate:
2017-09-30

Article Info:/Info

Title:
Strengths and light fastness of the strengthening-dyeing modified poplar wood
Article ID:
1000-2006(2017)05-0147-05
Author(s):
WANG Xueyu LYU Wenhua*
Research Institute of Wood Industry, Chinese Academy of Forestry, Beijing 100091, China
Keywords:
Keywords:planted poplar wood strengthening-dyeing modification physical and mechanical properties microstructure light fastness
Classification number :
S781
DOI:
10.3969/j.issn.1000-2006.201608030
Document Code:
A
Abstract:
【Objective】This study is to improve the physical, mechanical and decorative properties of Chinese fir wood simultaneously, and provide technical support for the efficient value-added utilization of fast-growing soft wood. 【Method】The strengthening-dyeing modifier was prepared by mixing the acid red G with the self-made melamine-urea-formaldehyde resin(MUF)which was of low-molecular-weight and water-soluble, and the planted poplar wood was modified with the compound modifier by impregnation treatment, then its color, strength, light fastness and microstructure morphology were studied. 【Result】 The Δa*b*C*L* and ΔE*of strengthening-dyeing modified wood were consistent with water dyed wood, and its surface and internal color difference was less than water dyed wood. Compared with untreated wood, the density, bending modulus, bending strength and compressive strength of strengthening-dyeing modified wood were increased by 38.2%, 6.28%, 20.67% and 48.87%, respectively, which were similar to those of the resin strengthened wood. Cell lumens and intercellular space of the wood treated by MUF and compound modifier were filled. Compared with water dyed wood, the dye particles was more uniform in compound modified wood. Color degradation rate of the water dyed wood was the fastest within 10 h at Xenon light, and begin leveling off at 50 h.While color degradation rate of the strengthening-dyeing modified wood begin accelerating within 50-75 h, then begin leveling off at 75 h.The color fastness to light of the strengthening-dyeing modified wood was increased by 28.3% than water dyed wood.【Conclusion】 Compared with the dye water solution the compound modifier had better and more uniform dyeing effect. The additional dye had no significant effect on the wood modification of the resin. The SEM analysis showed that the dye did not affect the MUF's good permeability. The density and mechanical strength of treated wood have been greatly improved by the filling of cell lumens and intercellular space by modifiers; compound modified wood had better color fastness to water as. The strengthening-dyeing modified wood had better color fastness to light than water dyed wood. This technology integrated the functional modification and dyeing of fast-growing poplar wood, its process was simple, and the treated wood exhibited high strength and good color, which could be directly used to make high value-added solid wood products.

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Last Update: 1900-01-01