What are the functional nano coatings for textiles?

The addition of nanoparticles can improve the performance of traditional coatings or prepare new functional nano coatings. At present, the focus of research on nano coatings is mainly on the latter. New functional nano-coatings can give textiles good functionality and are extremely widely used in the field of textile printing and dyeing.
Thermal insulation textiles can effectively relieve people's discomfort when they are exposed to continuous sunlight or high temperature environment for a long time, and form a better protective effect on the human body. The use of nano thermal insulation coatings to coat textiles is the most commonly used method for preparing thermal insulation textiles. Functional nano coatings can effectively improve the thermal insulation and cooling performance of textiles.
Waterproof fabrics are usually prepared by adding a waterproof coating to the surface of the fabric, and the excellent waterproof properties of the coating are used to give the fabric a waterproof function. However, the waterproof performance of the coated fabric made of traditional waterproof coatings is not stable enough and the durability is poor. If the fabric is in a humid climate for a long time (such as walking outdoors in rainy days for a long time), it is very important to ensure the excellent and long-lasting waterproof performance of the fabric. The combination of nanomaterials and coatings makes the waterproof coating both waterproof performance and durability. There is a certain degree of improvement.
At present, the relatively mature research and application of nano antibacterial coatings are mainly nano TiO2 coatings. Its antibacterial mechanism is to use the photocatalytic oxidation characteristics of nano TiO2 to produce reactive oxygen and free radicals with high reactivity to kill or inhibit the growth of microorganisms. , So as to achieve the antibacterial effect. Xu Ruifen and others disperse the surface-treated nano-TiO2 into a styrene-acrylic emulsion to prepare an antibacterial coating and conduct an antibacterial effect test. The results show that the antibacterial coating has an even killing rate on Staphylococcus aureus, Escherichia coli, Bacillus subtilis, etc. Reaching over 99%, it has a strong bactericidal effect and long-lasting antibacterial effect.
Similarly, under light conditions, nano-ZnO can decompose to form electron-hole pairs, combine with oxygen or water in the air to produce active oxygen and free radicals, which can kill most bacteria and viruses.
Inkjet printing is a non-contact, dot matrix, clean and environmentally friendly textile printing process. The dye ink used in textile digital inkjet printing has poor light fastness, long production cycle and pollution to the environment, so it is difficult to promote and apply. Compared with dye ink, paint ink has the advantages of strong versatility, simple process, no floating color and more environmental protection. However, the performance and stability of paint ink for domestic textile inkjet printing are poor, and the durability of printed fabrics Water washing, wet friction resistance and other properties are all lacking, which seriously hinder the large-scale promotion of pigment inkjet printing technology.