Preparation of Tungsten-Based Polyvinyl Alcohol Waterborne Coating and Development of Photochromic Composite Fabric

A kind of tungsten-based polyvinyl alcohol (PVA) waterborne coating has been synthesized successfully. Two kinds of composite discoloration fabrics are prepared by cotton and polyester with coating method, which have a UV detection function. The color of composite discoloration fabric changes from white to blue under 365 nm UV lamp irradiation for 30 s and sunlight irradiation for 3 s. The influence of PVA concentration on the washability of fabric and the influence of polyurethane seal on discoloration of fabric are studied. In addition, the application of the water-based coating shortens the preparation time of composite fabric, and greatly improves the preparation efficiency. This work lays a foundation for the development and application of photochromism textiles.