Painting properties and lightfastness of microwave puffed wood-based metal composites
-
摘要:
目的 微波膨化木基金属复合材料（PWMC）是一种密度适中、高导热、富有装饰性的新型金属木材料。为其未来在室内装饰、家居木制品等领域的高附加值应用提供技术支撑，开展了涂饰性能与耐光老化性的研究。 方法 使用水性聚氨酯清漆涂饰PWMC，研究涂饰工艺对表面色度学参数和光泽度的影响，探讨砂纸目数与表面粗糙度间的关系。在紫外光老化条件下，研究光老化处理前后PWMC的色度学参数和光泽度变化，分析木材区域及表面聚氨酯涂层的光降解机理。 结果 透明涂饰对PWMC发挥着保护与装饰的双重作用。三底两面透明涂饰处理后PWMC整体、木材和金属区域的总色差值分别为10.26、9.07和3.22，木材区域颜色变幅大于金属区域。涂饰后金属与木材两区域间的光泽度差异值由17.7降至2.3，表明涂饰处理能够有效降低光泽度差异。砂纸目数为240目时，PWMC各区域具有相近的粗糙度参数、差异值较小，表面平整且均一，此时漆膜附着力最佳（0级）。720 h光照下PWMC木材区域偏绿黄变化，木材与金属区域明度值增加；涂饰后木材与金属两区域的色度学参数变化幅度与失光率更低，证实了水性聚氨酯清漆对PWMC耐光性的提升作用。红外光谱与X射线光电子能谱显示PWMC木材区域与聚氨酯涂层中碳的氧化态升高，说明紫外光老化条件下发生了氧化降解。 结论 本研究探明了微波膨化木基金属复合材料的涂饰性能与耐光性，为微波膨化木增值利用提供了理论和技术依据。 Abstract:Objective Puffed wood-based metal composite (PWMC) is decorative metallic wood material with a high thermal conductivity and moderate density. To provide technical reference for its future high value-added applications in the fields of interior decoration and household wooden products, the research on painting properties and lightfastness of PWMC has been carried out in this paper. Method Waterborne polyurethane paints were coated on PWMC surface. We studied the effect of the painting number on the colorimetric parameters and gloss. The relationship between sandpaper grit and film adhesion was investigated by comprehensively analyzing the surface roughness parameters. Meanwhile, the surface color changes and gloss loss rate were characterized after 720 h artificially accelerated UV ageing treatment. The photodegradation mechanism was also analyzed by comparing the surface chemical structures. Result Clear varnish finishes play a dual role of protection and decoration for PWMC. After the three-primers and two-topcoats painting treatment, the total color difference values of PWMC, wood area, and metal area were 10.26, 9.07 and 3.22, respectively. It indicated that the color variation of the wood area was larger than that of the metal area. The gloss value difference between wood and metal areas decreased from 17.7 to 2.3 after painting, representing that the painting treatment resulted in a more uniform surface gloss. The roughness parameters of PWMC wood and metal areas were similar when sandpaper grit was 240. It maintained a flat and homogeneous surface, thus PWMC had a best paint film adhesion (level 0). Under artificially accelerated UV ageing of 720 h, PWMC wood area changed to greenish-yellow, and the lightness of wood and metal areas increased. The colorimetric parameter changes and light loss rate of wood and metal areas were reduced after painting. It confirmed that the enhancement of waterborne polyurethane paints on the lightfastness of PWMC. Infrared spectroscopy and X-ray photoelectron spectroscopy showed an increase in the oxidation state of carbon atoms, indicating oxidative degradation happened in PWMC wood area and coating paints under light irradiation. Conclusion The painting properties and lightfastness were investigated, providing a theoretical and technical basis for the value-added utilization of PWMC. -
图 1 不同涂饰次数的样品色度学参数
Figure 1. Chromaticity parameters of samples at different painting numbers
图 3 不同砂纸目数下粗糙度参数及漆膜附着力
Figure 3. Roughness parameters and paint film adhesion at different sandpaper grits
图 4 紫外光老化条件下色度学参数变化
Figure 4. Changes in chromatographic parameters under accelerated UV ageing
-
[1] 王振宇, 林兰英, 傅峰, 等. 木材高强微波处理及其结构失效机制研究进展[J]. 林业工程学报, 2022, 7(4): 13−21.Wang Z Y, Lin L Y, Fu F, et al. Research progress on high-intensity microwave treatment and failure mechanism of wood[J]. Journal of Forestry Engineering, 2022, 7(4): 13−21. [2] Zhang Y, Lin L Y, Fu F. High-permeability wood with microwave remodeling structure[J]. Forests, 2021, 12: 1432. doi: 10.3390/f12111432 [3] Chai Y, Liang S Q, Zhou Y D, et al. Low-melting-point alloy integration into puffed wood for improving mechanical and thermal properties of wood–metal functional composites[J]. Wood Science and Technology, 2020, 54: 637−649. doi: 10.1007/s00226-020-01174-5 [4] 柴媛, 陶鑫, 梁善庆, 等. 填缝型微波膨化木基金属复合材料制备及其性能表征[J]. 北京林业大学学报, 2021, 43(10): 118−125.Chai Y, Tao X, Liang S Q, et al. Preparation and property characterization of crack-filled type microwave puffed wood based metal composites[J]. Journal of Beijing Forestry University, 2021, 43(10): 118−125. [5] 刘一星, 于海鹏. 透明涂饰对木材纹理等视觉特征的影响分析[J]. 林业科学, 2006, 42(12): 90−94.Liu Y X, Yu H P. Effect of clear lacquer on textural vision of wood surface[J]. Scientia Silvae Sinicae, 2006, 42(12): 90−94. [6] 侯新毅, 姜笑梅, 殷亚方. 从色度学参数研究3种桉树木材的透明涂饰性能[J]. 林业科学, 2006, 42(8): 57−62.Hou X Y, Jiang X M, Yin Y F. Study on clear painting properties for three eucalyptus plantation woods from the chromatic parameters[J]. Scientia Silvae Sinicae, 2006, 42(8): 57−62. [7] 皇权飞, 黄艳辉, 张唯, 等. 基于水曲柳基材的水性漆漆膜性能研究[J]. 北京林业大学学报, 2020, 42(7): 140−146.Huang Q F, Huang Y H, Zhang W, et al. Film properties of waterborne paint based on Fraxinus mandshurica substrate[J]. Journal of Beijing Forestry University, 2020, 42(7): 140−146. [8] Tao X, Tian D X, Liang S Q, et al. Facile strategy for preparing puffed wood-based metal composites with low density and enhanced thermal conduction via high-intensity microwave puffing pretreatment[J]. Industrial Crops and Products, 2023, 194: 116388. doi: 10.1016/j.indcrop.2023.116388 [9] 孙丹, 李鸽. GB/T3505—2009《产品几何技术规范(GPS) 表面结构 轮廓法 术语、定义及表面结构参数》标准介绍[J]. 机械工业标准化与质量, 2010, 443(4): 17−24.Sun D, Li G. Standard introduction of GB/T3505−2009 Geometrical product specification (GPS)—surface texture: profile method—terms, definitions, and surface texture parameters[J]. Machinery Industry Standardization & Quality, 2010, 443(4): 17−24. [10] Han J J, Wei Z, Wang G. Investigation of influence factors on surface roughness of micro-scale features[J]. Precision Engineering, 2019, 56: 524−529. doi: 10.1016/j.precisioneng.2019.02.010 [11] 林兰英, 何盛, 傅峰, 等. 基于图像处理的微波处理材裂纹评价[J]. 林业科学, 2014, 50(4): 84−89.Lin L Y, He S, Fu F, et al. Evaluation of the cracks in microwave-treated lumbers based on image processing[J]. Scientia Silvae Sinicae, 2014, 50(4): 84−89. [12] 刘梓灵, 涂登云, 周桥芳, 等. 压缩工艺和热处理对单侧表层压缩木涂饰性能的影响[J]. 木材科学与技术, 2022, 36(6): 75−81.Liu Z L, Tu D Y, Zhou Q F, et al. Effect of compression process and heat treatment on coating performance of unilaterally surface-densified wood[J]. Chinese Journal of Wood Science and Technology, 2022, 36(6): 75−81. [13] Sulaiman O, Hashim R, Subari K, et al. Effect of sanding on surface roughness of rubberwood[J]. Journal of Materials Processing Technology, 2009, 209(8): 3949−3955. doi: 10.1016/j.jmatprotec.2008.09.009 [14] 张梦莹, 吕建雄, 李萍, 等. 硅酸盐改性杨木表面粗糙度对漆膜附着性能的影响[J]. 林业工程学报, 2022, 7(6): 196−201.Zhang M Y, Lü J X, Li P, et al. Influences of surface roughness on the paint film adhesion properties of silicate-modified poplar[J]. Journal of Forestry Engineering, 2022, 7(6): 196−201. [15] Tayeh B A, Bakar B A, Johari M M, et al. The relationship between substrate roughness parameters and bond strength of ultra high-performance fiber concrete[J]. Journal of Adhesion Science and Technology, 2013, 27(16): 1790−1810. doi: 10.1080/01694243.2012.761543 [16] 刘晓玲, 陈松武, 冯沁雄, 等. 桉木透明涂饰漆膜耐光性的研究[J]. 西北林学院学报, 2020, 35(2): 223−228.Liu X L, Chen S W, Feng Q X, et al. Light fastness of clear painted varnish film on encalyptus wood[J]. Journal of Northwest Forestry University, 2020, 35(2): 223−228. [17] Müller U, Rätzsch M, Schwanninger M, et al. Yellowing and IR-changes of spruce wood as result of UV-irradiation[J]. Journal of Photochemistry and Photobiology B: Biology, 2003: 69 (2): 97−105. [18] 王小青, 任海青, 赵荣军, 等. 毛竹材表面光化降解的FTIR和XPS分析[J]. 光谱学与光谱分析, 2009, 29(7): 1864−1867.Wang X Q, Ren H Q, Zhao R J, et al. FTIR and XPS spectroscopic studies of photodegradation of moso bamboo ( Phyllostachys pubescens mazel)[J]. Spectroscopy and Spectral Analysis, 2009, 29(7): 1864−1867. [19] Wang X Q, Ren H Q. Comparative study of the photo-discoloration of moso bamboo ( Phyllostachys pubescens Mazel) and two wood species[J]. Applied Surface Science, 2008, 254(21): 7029−7034. doi: 10.1016/j.apsusc.2008.05.121 [20] Liu J, Li Z, Zhang L W, et al. Degradation behavior and mechanism of polyurethane coating for aerospace application under atmospheric conditions in South China Sea[J]. Progress in Organic Coatings, 2019, 136: 105310. doi: 10.1016/j.porgcoat.2019.105310 -
下载:
点击查看大图
图(7)
计量
- 文章访问数: 16
- HTML全文浏览量: 3
- PDF下载量: 4
- 被引次数: 0
