| The traditional dyeing process will cause problems like high energy consumption,high water consumption and high emissions,structural color provides us a new concept that can solve the problem of water pollution on dyeing and finishing industry fundamentally,it's a new technique that totally different from the traditionaldyeing process.In this paper,We've prepared size-controlled SiO2 microspheres and TiO2-SiO2 core-shell microspheres with SiO2 as the "core",and the photonic crystal structural colors were produced on fabric substrate by self-assembly process with the prepared microspheres.By characterizing the colloidal microspheres and formation of structural color,the preparation process of microspheres,the self-assembly process,the properties of textiles,the influences of base color of textiles and the antibacterial ability of the coatings was discussed.It was believed that this study could provide some valuable guidance in producing photonic crystal structural color with antibacterial properties on textiles.In this paper,the following several aspects were mainly discussed:1.SiO2 colloidal microspheres and TiO2-SiO2 core-shell microspheres with SiO2 as the "core" were prepared with Sol-Gel method based on the St?ber method,by controlling the amount of TEOS,the amount of ammonia,reaction time and reaction temperature can select the optimum preparation process of SiO2 microspheres;by controlling the amount of water,the mass ratio of SiO2/TBOT and reaction temperature can select the optimum preparation process of TiO2-SiO2 core-shell microspheres.The monodispersity and the structure properties of microspheres was represented by using the Malvern laser particle size analyzer and the Fourier transform infrared?FTIR?,the surface morphology of microspheres were characterized by using a scanning electron microscope?SEM?and transmission electron microscopy?TEM?.The research shows that the size of SiO2 microspheres increased with the amount of TEOS,with the increase of ammonia content first and then decreased,with the increase of reaction time first and then decreased and tends to the flat state,decrease with the temperature increasing.When the amount of water was 1.5mL,the mass ratio of SiO2/TBOT was 1,and the reaction temperature was 30?,the optimum TiO2-SiO2 core-shell microspheres can be selected.2.The SiO2 colloidal microspheres and Ti O2-SiO2 core-shell microspheres were prepared into suspension solution with a certain concentration,colloidal crystal thin films that produce structural colors over a wide visible spectrum have been self-assembled on glass slides from them.We use SEM,stereo microscope and the digital camera to represent colloidal crystal thin films that produce structural colors,the formation mechanism of structural colors and the relationships between the size and color were studied in this paper.The results show that,by controlling the size of the SiO2 colloidal microspheres and TiO2-SiO2 core-shell microspheres can make the corresponding structural color film on purple,blue,green and red.3.We studied the photonic crystal structural colors on textiles which produced by the SiO2 colloidal microspheres and TiO2-SiO2 core-shell microspheres by self-assembly process including natural sedimentation,centrifugal deposition and vertical deposition,and confirmed the optimal self-assembly process;Researched the self-assembly of photonic crystals on different textiles with materials' properties of Polyester fiber,nylon and ramie when use vertical deposition self-assembly method,and confirmed the optima textile;And confirmed the optimal base color of textile by changing the textile's color with black,white,red when choose nylon to be the textile by vertical deposition.The structural color film on the textiles was characterized by using a stereo microscope and a digital camera,and the color performance and structure of two kinds of microspheres were analyzed and compared.The Escherichia coli was used to test the antibacterial properties of SiO2 colloidal microspheres and TiO2-SiO2 core-shell microspheres,the absorbance of the samples was characterized by UV spectrophotometer to compare and analyze the antibacterial properties of materials.The results show as follows,we could get an obvious structural color when we choose the self-assembly process was vertical deposition,the textile was nylon,the base color of textile was black,and the SiO2 colloidal microspheres don't have anti-bacterial property,TiO2-SiO2 core-shell microspheres have certain antibacterial property. |
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