• 论文与研究报告 •

### 人工林杨木增强-染色复合改性材的性能

1. 中国林业科学研究院木材工业研究所 北京 100091
• 收稿日期:2016-09-11 修回日期:2016-02-25 出版日期:2017-01-25 发布日期:2017-03-03
• 通讯作者: 吕文华
• 基金资助:
中央级公益性科研院所基本科研业务费专项资金（CAFYBB2014MB003）。

### Properties of Strengthening-Dyeing-Combined Modified Plantation Poplar Wood

Xu Maosong, Lü Wenhua, Wenhua Wang

1. Research Institute of Wood Industry, CAF Beijing 100091
• Received:2016-09-11 Revised:2016-02-25 Online:2017-01-25 Published:2017-03-03

Abstract: [Objective] In order to provide the technical support for the efficient exploitation and utilization of plantation poplar wood resources, this study investigated the method of strengthening-dyeing-combined modification of plantation poplar wood and the properties of the modified wood. [Method] The acid red G aqueous solution, the acid blue A aqueous solution, and the acid red G and the acid blue A blended individually with water soluble strengthening modifier (i.e. MUF resin), all of the same dye mass fraction, were used to modify the plantation poplar wood through the vacuum-pressure impregnation treatment, and the DA, DG, MUF-DA and MUF-DG dyed wood were obtained respectively. The physical and mechanical properties, color and colorfastness to water of all the dyed wood were measured.[Result] Results showed that: 1) The weight percent gain of the DA, DG, MUF-DA and MUF-DG dyed wood were -1.69%, -0.65%, 42.64% and 54.27%, and their density were 0.352, 0.365, 0.445 and 0.510 g·cm-3, respectively. Compared with those of the DA dyed wood, the density, modulus of elasticity (MOE), modulus of rupture (MOR), and compressive strength of the MUF-DA modified wood increased by 26.42%, 6.76%, 17.63%, and 54.32% respectively. As compared with those of the DG dyed wood, the density, MOE, MOR, and compressive strength of the MUF-DG modified wood increased by 39.73%, 8.58%, 18.82%, and 57.18% respectively. 2) The light index difference (ΔL*), green-red index difference (Δa*) and yellow-blue index difference (Δb*) of the DA and MUF-DA were all negative, and the MUF-DA's Δa* was lower, its ΔL* and Δb* were higher, so its blue tone was more obvious. As for the DG and MUF-DG, the ΔL* and Δb* were negative and the Δa* was positive, and the ΔL*, Δa* and Δb* of the MUF-DG were all higher, so its red tone was more obvious. The color saturation difference (ΔC*) of the MUF-DA and MUF-DG were much higher than those of the DA and DG. 3) The total color difference (ΔE*) of the DA and DG after water erosion test were 12.92 and 8.30 NBS, while those of the MUF-DA and MUF-DG decreased to 5.94 and 6.93 NBS respectively. 4) The IR spectra of the DA and DG dyed wood were similar to that of the untreated wood, and the spectra of the MUF-DA and MUF-DG modified wood were similar to that of the MUF strengthened wood, no new absorption peak was observed and the peak intensity was almost unchanged. [Conclusion] 1) The acid dyes had minor effects on the reinforcement function of MUF resin, and their combined modification could significantly improve the density, MOR, MOE, and the compressive strength of plantation poplar wood. 2) Compared with the simple dyed wood, the color of strengthening-dyeing combined wood was more vivid and showed better dyeing effect, especially the effect of MUF-DG was the best. 3) The colorfastness to water of the strengthening-dyeing combined wood was better than that of the simple dyed wood, especially the effect of MUF-DA was the best. 4) FTIR analysis showed that no new chemical group generated during the strengthening-dyeing combined modification process, and there was no new chemical bonding produced between the wood components and dye which deposited with MUF resin and fixed in wood.