Usability of photochromic dyes in the development of UV protective textile materials

The aim of this study was to investigate and develop UV protective textile materials. For this purpose, first, the UV protection properties of fabrics in different structures and colors were investigated and the effect of fabric structure and coloration on UV protection was evaluated. In this context, fabric constructions are listed as interlock, rib and single jersey, from high to low in UV protection. UV protection properties of the fabrics have been improved as a result of the coloration with conventional textile dyes. Then, performance properties of the fabrics were tested by application of photochromic dye to the fabrics. UV protection values of the fabrics were increased as a result of direct application of photochromic dyes to the fabric, however efficient dyeing results could not be obtained and permanent colors have been formed on the fabrics due to the water- insolubility and sensitive structure of these dyes. Encapsulation studies were carried out to develop the application of photochromic dyes to textile materials. In these studies, emulsion-solvent evaporation and spray drying methods were utilized. Optimal capsule production conditions were determined and the photochromic dye capsules were then applied to the fabrics. Permanent colors did not occur in the photochromic dye capsule applied fabrics, and they changed their color with UV light effect. UV protection results at 50+ UPF were obtained after application of the photochromic dye capsules to the cotton fabric produced by both methods.