摘要: 目的为丰富木制品颜色体系，探讨SiO ₂光子晶体在木材表面结构色的构筑和生色表现、�/sec> 方法采用改进的Stöber方法制备不同粒径的SiO ₂微球，通过重力沉积自组装法在木材基底上构建了SiO ₂光子晶体结构色。利用Ｘ射线衍射、傅里叶红外光谱表征了SiO ₂微球的组成和结构，通过扫描电子显微镜表征微球的外观形貌及其在木材基底上的排布方式，并分析了不同处理工艺下的微球粒径分布。通过数码相机和紫外–可见吸收光谱仪对木材表面SiO ₂结构生色的色度参数及紫外–可见光反射率进行了分析、�/sec> 结果Ｘ射线衍射、傅里叶红外光谱证实了本研究中所制备的反应产物都是纯相无定形SiO ₂，适用于构筑呈色良好的结构色涂层。制备配方只控制了乙醇添加量，添加量分别�?0�?5�?0�?5�?00�?05 mL，生成了单分散性良好的SiO ₂微球，粒径分别对应为294�?46�?26�?14�?94�?81 nm。参与自组装的SiO ₂粒径依次减小，薄膜颜色由红色逐渐变为绿色、蓝绿色，最后到深紫色、紫色、淡紫色，紫外反射波长逐渐减小，颜色发生蓝移。SiO ₂微球在木材基底表面呈现三维有序的面心立方结构堆积，因环境扰动会出现裂隙、缺失等组装缺陷，但不会影响整体呈色、�/sec> 结论只通过控制乙醇的添加量，就可以获得适用于构建光子晶体结构色�?种不同粒径的SiO ₂颗粒；不同粒径的二氧化硅微球在木材基底自组装后形成鲜艳明亮的结构色，且结构色涂层的颜色会因参与自组装的微球粒径减小发生蓝移。本研究为大规模制备木材表面结构色涂层提供了一种简单新颖的方法，可以丰富木制品颜色体系、�/sec>

关键诌�
• 光子晶体/
• 结构艱�/a> /
• 重力沉积自组裄�/a> /
• SiO₂微球/
• 木材颜色

Abstract: ObjectiveIn order to enrich the color system of wood products, this paper discusses the construction and color performance of SiO ₂photonic crystals on the surface of wood. MethodIn this paper, SiO ₂microspheres with different particle diameters were prepared by the Stöber method, and the SiO ₂photonic crystal structure color was constructed on the wood substrate by the gravity deposition self-assembly method. The chemical composition and structure of SiO ₂microspheres were characterized by X-ray diffraction and Fourier transform infrared spectroscopy. The morphology of the microspheres and their arrangement on the wood substrate were characterized by scanning electron microscopy, and the particle diameter distribution of the microspheres under different treatment processes was analyzed. The color parameters and UV-visible reflectance of SiO ₂structure on the wood surface were analyzed by digital camera and UV-visible absorption spectrometer. ResultX-ray diffraction, Fourier transform infrared spectroscopy confirmed that the reaction products prepared in this paper were pure amorphous SiO ₂, suitable for constructing well-colored structural color coating. The preparation formula only controlled the amount of ethanol added, and the addition amount was 80, 85, 90, 95, 100, and 105 mL, respectively. The monodisperse nano-SiO ₂was generated, and their particle diameters were 294, 246, 226, 214, 194, and 181 nm, respectively. As the particle diameter of SiO ₂involved in self-assembly decreased in turn, the color of the film gradually changed from red to green, blue-green, and finally to deep purple, purple, and lavender. The ultraviolet reflection wavelength gradually decreased and the color blue shifted. The SiO ₂microspheres showed a three-dimensional ordered face-centered cubic structure on the surface of the wood substrate. Due to environmental disturbances, assembly defects such as cracks and missing will occur, but will not affect the overall color. ConclusionOnly by controlling the amount of ethanol added, six different particle diameters of nano-SiO ₂particles suitable for constructing photonic crystal structure color can be prepared. Silica microspheres of various particle diameters formed bright structural colors after self-assembly on the wood substrate, and the color of the structural color coating would blue shift due to the particle diameter reduction of the self-assembled microspheres. The above research content provides a simple and novel method for the large-scale preparation of wood surface structural color coatings, which can enrich the color system of wood products.

Key words:
• photonic crystal/
• structural color/
• vertical deposition self-assembly/
• SiO₂microspheres/
• wood color

�?nbsp; 1SiO₂微球FTIR国�/p>

Figure 1.FTIR diagram of SiO₂microspheres

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�?nbsp; 2不同粒径SiO₂微球的XRD国�/p>

Figure 2.XRD diagram of SiO₂particles of different diameters

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�?nbsp; 3SiO₂微球粒径分布国�/p>

Figure 3.Particle diameter distribution diagram of SiO₂microspheres

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�?nbsp; 4乙醇体积分数和SiO₂微球粒径之间的关糺�/p>

Figure 4.Relationship between different ethanol volume fractions and diameter of SiO₂microspheres

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�?nbsp; 5不同粒径SiO₂微球在轻木基底表面形成的结构色涂屁�/p>

Figure 5.Structural color coatings formed by SiO₂particles of different diameters on the surface of balsa wood substrates

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�?nbsp; 6Wood-SiO₂-85样品表面结构色涂层中的裂纹（a）、面心立方（FCC）排列和缺失（b）和四方排列（c（�/p>

Figure 6.Cracks (a), face-centered cubic (FCC) array and absence (b), square array (c) in the structural color coating on the surface of wood-SiO₂-85 sample

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�?nbsp; 7不同粒径SiO₂微球在轻木基底表面形成的结构色涂层的漫反射光谱图

Figure 7.Diffuse reflectance spectra of structural color coatings formed by different SiO₂particle diameters on balsa substrates

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�?nbsp; 86种轻木表面结构色涂层的CIE色度国�/p>

Figure 8.CIE chromaticity diagram of 6 kinds of structural color coatings on balsa wood surface

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�?nbsp; 1不同粒径SiO₂微球的制备配斸�/p>

Table 1.Recipes for the preparation of SiO₂microspheres with different particle diameters

编号 No.	乙醇 Ethanol/mL	正硅酸乙�?br/>Tetraethyl orthosilicate/mL	氨水 Ammonia/mL	去离子水 Deionized water/mL	温度 Temperature/ℂ�/td>
SiO2-80	80	6	8	3	60
SiO2-85	85	6	8	3	60
SiO2-90	90	6	8	3	60
SiO2-95	95	6	8	3	60
SiO2-100	100	6	8	3	60
SiO2-105	105	6	8	3	60

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�?nbsp; 2木材表面结构色涂层的色度倻�/p>

Table 2.Chromatic values of structural color films on wood surface

样品 Sample	明度 Lightness ${(L}^{*})$	红绿轴指� Green-red component $ \left({a}^{*}\right) $	黄蓝轴指�?br/>Blue-yellow component $ ({b}^{*}) $
SiO2-80	79	27	17
SiO2-85	86	�?1	52
SiO2-90	90	�?2	�?
SiO2-95	47	30	�?1
SiO2-100	70	12	�?0
SiO2-105	78	10	�?9

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[2]于海�? 刘一�? 刘迎�? 国内外木质环境学的研究概述[J]. 世界林业研究, 2003, 16(6): 20�?6. doi:10.3969/j.issn.1001-4241.2003.06.005

Yu H P, Liu Y X, Liu Y T. Wood environment science research status and development at domestic and abroad[J]. World Forestry Research, 2003, 16(6): 20�?6. doi:10.3969/j.issn.1001-4241.2003.06.005 [3]刘光�? 侯佳, 徐建�? 木材材色研究进展[J]. 世界林业研究, 2021, 34(4): 46�?3. doi:10.13348/j.cnki.sjlyyj.2021.0019.y

Liu G J, Hou J, Xu J M. A review of the research on wood color[J]. World Forestry Research, 2021, 34(4): 46�?3. doi:10.13348/j.cnki.sjlyyj.2021.0019.y [4]Yablonovitch E. Inhibited spontaneous emission in solid-state physics and electronics[J]. Physical Review Letters, 1987, 58(20): 2059�?062. doi:10.1103/PhysRevLett.58.2059 [5]Feng L, Wang F, Luo H J, et al. Review of recent advancements in the biomimicry of structural colors[J]. Dyes and Pigments, 2023, 210: 111019. doi:10.1016/j.dyepig.2022.111019 [6]Chen S W, Lu J Y, Tung P H, et al. Study of laser actions by bird’s feathers with photonic crystals[J]. Scientific Reports, 2021, 11(1): 1�?. doi:10.1038/s41598-020-79139-8 [7]Thomé M, Richalot E, Berthier S. Light guidance in photonic structures of Morphobutterfly wing scales[J]. Applied Physics A, 2020, 126(10): 1�?1. [8]梁冬�? 李绍�? 李阳, �? 基于等离子体光学效应的调谐结构色器件发展及应用[J]. 物理与工�? 2022, 32(2): 155�?69. doi:10.3969/j.issn.1009-7104.2022.02.027

Liang D D, Li S J, Li Y, et al. Development and application of tunable structural color devices based on plasmonic’s effects[J]. Physics and Engineering, 2022, 32(2): 155�?69. doi:10.3969/j.issn.1009-7104.2022.02.027 [9]张子�? 刘云�? 谢新�? �? 多彩结构色–柔性光子晶体材料与应用[J]. 包装工程, 2022, 43(19): 40�?8.

Zhang Z L, Liu Y Y, Xie X Y, et al. Versatile structure color-flexible photonic crystal material and its application[J]. Packaging Engineering, 2022, 43(19): 40�?8. [10]吴玉�? 刘国�? 李义�? �? 二氧化硅光子晶体在涤纶织物上的结构生色[J]. 纺织学报, 2015, 36(10): 62�?6. doi:10.13475/j.fzxb.20140905005

Wu Y J, Liu G J, Li Y C, et al. Structural colors of SiO ₂photonic crystals on polyester fabrics[J]. Journal of Textile Research, 2015, 36(10): 62�?6. doi:10.13475/j.fzxb.20140905005 [11]Bao B, Liu D, Yang Y, et al. Self-assembly of ternary particles for tough colloidal crystals with vivid structure colors[J]. Journal of Nanomaterials, 2013(8): 1�?4. [12]Núñez-Montenegro A, Crista D M A, da Silva J C G E. Structural coloration based on photonic crystals for coating applications on wood[J]. European Journal of Wood and Wood Products, 2020, 78(2): 293�?00. doi:10.1007/s00107-020-01499-9 [13]彭晶�? 陈佳�? 高伟�? �? 均匀SiO ₂纳米颗粒的制备及其结构生色[J]. 北京服装学院学报: 自然科学�? 2021, 41(1): 7�?3.

Peng J J, Chen J Y, Gao W H, et al. Synthesis of uniform SiO ₂nanoparticles and its structural coloration[J]. Journal of Beijing Institute of Fashion Technology: Natural Science Edition, 2021, 41(1): 7�?3. [14]Stöber W, Fink A, Bohn E. Controlled growth of monodisperse silica spheres in the micron size range[J]. Journal of Colloid & Interface Science, 1968, 26(1): 62�?9. [15]Tominaga S. Color classification of natural color images[J]. Color Research & Application, 1992, 17(4): 230�?39. [16]Gao W, Rigout M, Owens H. Facile control of silica nanoparticles using a novel solvent varying method for the fabrication of artificial opal photonic crystals[J]. Journal of Nanoparticle Research, 2016, 18(12): 387. doi:10.1007/s11051-016-3691-8 [17]Canton G, Ricco R, Marinello F, et al. Modified Stöber synthesis of highly luminescent dye-doped silica nanoparticles[J]. Journal of Nanoparticle Research, 2011, 13(9): 4349�?356. doi:10.1007/s11051-011-0382-3 [18]Isapour G, Lattuada M. Bioinspired stimuli-responsive color-changing systems[J]. Advanced Materials, 2018, 30(19): 1707069. doi:10.1002/adma.201707069 [19]Miguez H, Meseguer F, Lopez C, et al. Evidence of FCC crystallization of SiO ₂nanospheres[J]. Langmuir, 1997, 13(23): 6009�?011. doi:10.1021/la970589o