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。【方法】采用改进的St?ber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。【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,添加量分别为80、85、90、95、100、105 mL,生成了单分散性良好的SiO_(2)微球,粒径分别对应为294、246、226、214、194、181 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。【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的6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。
[Objective] In order to enrich the color system of wood products,this paper discusses the construction and color performance of SiO_2 photonic crystals on the surface of wood.[Method] In this paper,SiO_2 microspheres with different particle diameters were prepared by the St?ber method,and the SiO_2 photonic crystal structure color was constructed on the wood substrate by the gravity deposition selfassembly method.The chemical composition and structure of SiO_2 microspheres were characterized by Xray 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_2 structure on the wood surface were analyzed by digital camera and UV-visible absorption spectrometer.[Result] X-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_2 was generated,and their particle diameters were 294,246,226,214,194,and 181nm,respectively.As the particle diameter of SiO_2 involved 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_2 microspheres 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.[Conclusion] Only by controlling the amount of ethanol added,six different particle diameters of nano-SiO_2 particles 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.
作者
李元元
任瑞清
陈瑶
高建民
Li Yuanyuan;Ren Ruiqing;Chen Yao;Gao Jianmin(Key Laboratory of Wood Material Science and Application of Ministry of Education,Beijing Forestry University,Beijing 100083,China)
出处
《北京林业大学学报》
CAS
CSCD
北大核心
2023年第3期137-144,共8页
Journal of Beijing Forestry University
基金
国家自然科学基金项目(31400498)。
