The addition of nanoparticles can improve the performance of traditional coatings or prepare new functional nanocoatings. Current research on nanocoatings focuses on the latter. New functional nano-coatings can give textiles good functionality and are widely used in the field of textile printing and dyeing.
Thermal cooling nano-coating
Thermal insulation textiles can effectively alleviate the discomfort caused by people being exposed to continuous sunlight or high temperature environments for a long time, and form a good protective effect on the human body. The use of nano thermal insulation coatings to coat textiles is the most common method for preparing thermal insulation textiles. Functional nano coatings can effectively improve the thermal insulation and cooling properties of textiles.
Nano waterproof coating
The preparation of waterproof fabrics usually involves adding a waterproof coating to the surface of the fabric. The excellent waterproof properties of the coating are used to give the fabric a waterproof function. However, the waterproof performance of coated fabrics made from traditional waterproof coatings is not stable and durable enough. Poor. If the fabric is exposed to a humid climate environment for a long time (such as walking outdoors on a rainy day for a long time), it is very important to ensure the excellent and lasting waterproof performance of the fabric. The combination of nanomaterials and coatings makes the waterproof coating have both waterproof performance and durability. There is a certain degree of improvement.
Nano antibacterial coating
The currently more mature nano-antibacterial coatings in research and application are mainly nano-TiO2 coatings. Its anti-bacterial mechanism is to use the highly reactive reactive oxygen species and free radicals generated by the photocatalytic oxidation properties of nano-TiO2 to kill Or inhibit the growth of microorganisms, thereby achieving antibacterial effects. Xu Ruifen et al. dispersed the surface-treated nano-TiO2 into a styrene-acrylic emulsion to prepare an antibacterial coating and conducted an antibacterial effect test. The results showed that the antibacterial coating had an average killing rate against Staphylococcus aureus, Escherichia coli, and Bacillus subtilis. Reaching more than 99%, it has a strong bactericidal effect and a long-lasting antibacterial effect.
Similarly, nano-ZnO can decompose under light conditions to form electron-hole pairs, which combine with oxygen or moisture in the air to produce active oxygen and free radicals, which can kill large particles. Most bacteria and viruses.
Nano coating ink for inkjet printing
Inkjet printing is a non-contact, dot-matrix, clean and environmentally friendly textile printing process. The dye ink used in digital inkjet printing of textiles has poor light fastness, long production cycle and pollution to the environment, so it is difficult to promote and apply it. . Compared with dye inks, coating inks have the advantages of strong versatility, simple process, no floating color and more environmental protection. However, the performance and stability of coating inks used in domestic textile inkjet printing are poor, and the durability of printed fabrics The properties such as water washability and wet friction resistance are lacking, which seriously hinder the large-scale promotion of paint inkjet printing technology.
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