SiO_2胶体微球在蚕丝织物上的重力沉降自组装条件研究

An Investigation on Gravitational Sedim entation Self-assem bly of SiO_2 Colloidal Microspheres on Silk Fabrics

通过结构生色(物理生色)替代化学染料染色是织物染色研究的一个重要方向。以单分散SiO_2胶体微球作为自组装结构单元,在蚕丝织物上构建能生成结构色的SiO_2光子晶体,研究相对湿度、自组装温度、胶体微球浓度、组装溶剂以及组装时间对胶体微球在蚕丝织物上的自组装效果的影响,并应用扫描电子显微镜和紫外-可见分光光度计表征与分析蚕丝织物上光子晶体结构形貌和结构色变化。结果表明:在相对湿度60%、温度25℃、胶体微球质量分数(wt)为2.0%左右、以纯水或纯乙醇为组装溶剂的自组装条件下,SiO_2胶体微球可以在蚕丝织物上构建三维有序的SiO_2光子晶体结构,赋予蚕丝织物鲜艳均匀的结构色。

Using structural coloration（ physical coloration） to replace chemical dye is one of important direction for dyeing of silk fabrics. In this paper,SiO2 photonic crystal with structural color was fabricated on the surface of silk fabrics by using monodispersed SiO2 colloidal microspheres as self-assembly structural unit. The effects of relative humility,self-assembly temperature,colloidal microspheres concentration,assembly solvent,and self-assembly time on the self-assembly of SiO2 colloidal microspheres on silk fabrics were investigated. Changes of the photonic crystal structure and structural color were characterized and analyzed by scanning electron microscope（ SEM） and ultraviolet-visible spectrophotometry. The results indicated that under the conditions of relative humility 60%,temperature 25 ℃,the mass fraction（ wt） of SiO22. 0% and using pure water and ethanol as solvent,three-dimensionally ordered SiO2 photonic crystal can be fabricated on the silk fabrics after self-assembly of SiO2 colloidal microspheres and display uniform and bright structural colors.