Structural color is a color formed by the interaction between light and micro/nanostructures, characterized by high brightness, high saturation, and other characteristics. If the microstructure that forms the structural color is not destroyed. So the structural color will never fade. Develop fibers and fabrics with structural color development through the method of structural color development. It is of great significance to reduce the pollution caused by traditional printing and dyeing.
Recently, a research team from East China Normal University has utilized a spray coating process to accurately assemble colloidal photopolymer (PC) within each yarn of polyester (PET) fabric. The prepared PC/PET fabric has saturated and durable colors, good softness, and high breathability.
The researchers developed a two-step spraying process. PET fabrics can be considered as hierarchical porous structures with large cracks between yarns. There are small gaps in the fibers. When spraying the SiO2 colloidal solution for the first time, a thin liquid film quickly forms on the surface of PET fabric, and then the limited volume of the colloidal solution is completely absorbed into the porous yarn through capillary force. As the solvent evaporates during the heating process, particles spontaneously precipitate to form liquid colloidal PC. Then, they are transformed into solid PCs. In the subsequent PA adhesive spraying. Due to the same capillary interaction, PA nanoparticles are also enriched on the surface of PET yarn filled with S102 particles. When the sample is heated above the glass transition temperature and then cooled to room temperature, PA nanoparticles are cultured and cured. And it includes Haohao PC structure and PET yarn. Finally generate colored PC/PET fabric.
After verification, this spraying process can produce PC/PET fabrics with uniform, saturated, and diverse structural colors. When the incident angle and reflection angle of light change from 0 ° to 30 °, 45 °, and 60 °, the reflection wavelength of red PC modified fabric correspondingly changes from 650 nm to 605 nm 555nm and 503nm.
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