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Nanomaterials for textiles

With the development of science and technology and the improvement of human living standards, people have imcreasing requirements on comfortable and novel health care for clothing. Now people apply nano materials to textiles, and various functional textiles have emerged. Here are a few nano materials for textiles.

1.Nano zinc oxide

The photocatalytic antibacterial mechanism of Zinc Oxide Nanopowder and the antibacterial mechanism of metal ion dissolution have an antibacterial and deodorizing function; the nano zinc oxide has a strong absorption effect on ultraviolet rays in the range of 200-400 nm, and can be used as an ultraviolet shielding agent.

Nano zinc oxide itself is non-toxic and environmentally friendly; compared with antibacterial nano silver, the price is much lower.

Because of these functions and advantages, nano zinc oxide can be used to make functional textiles with antibacterial deodorizing function and UV protection.

2.Nano titanium oxide

Nano TiO2 has the basic properties of nano functional materials, and is used in textiles to have functions such as UV resistance, self-cleaning, air purification, anti-static, anti-infrared, anti-aging, etc.

Nano titanium dioxide is used in the textile slurry. Through the perfect combination with starch, the comprehensive weaving performance of the yarn is improved, the amount of PVA is reduced, the cooking time is short, the slurry cost is reduced, the sizing efficiency is improved, and the PVA pulp is also solved. It is not easy to desizing, environmental pollution and many other problems. Nano-titanium dioxide nano-titanium dioxide is mainly used to replace PVA in the yarn, which acts as a smooth hair, fills the gap and lubricates.

3.Nano silica

Nano-silica powder used in textiles can enhance the adhesion of the slurry to the fiber. The active hydroxyl groups on the surface and the hydrogen bonds on the starch and the hydroxyl groups on the cotton fibers have strong or weak hydrogen bonding, which can effectively improve the pure cotton and polyester. The sizing performance of cotton yarn; nano-silica is more beneficial to the sizing of cellulose fibers; it has the effect of enhancing and grinding and reducing hairiness.

Hydrophobic nano silica can be used to make hydrophobic textiles.

 

4.Nano antimony trioxide

Nano Antimony trioxide is a commonly used inorganic flame retardant and does not have good flame retardancy. However, when it is used together with a halogen flame retardant, it will have a great synergistic effect. Commonly used cerium oxides are antimony trioxide and antimony pentoxide, mainly antimony trioxide, and its flame retardant performance is 3-5 times that of antimony pentoxide. Therefore, it is generally believed that the flame retardant of antimony is antimony trioxide, which can be used for preparing flame retardant textile coatings, non-woven coating coating flame retardant, carpet flame retardant and other fireproof coatings, fire retardant coating flame retardant and the like.

In practical applications, it is often the case that several nano materials are mixed with other auxiliaries in textiles for new and functional textiles.

Nano-textiles are favored by researchers and companies for their superior performance, and the variety is growing. It is believed that these nano materials market for textiles will be increasing. https://www.hwnanomaterial.com/

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Nano SiO2 is widely used in many aspects, and here are some applications of silica nanopowder in coatings.

1. Application of nano-silica SIO2 in architectural coatings
Adding nano-silica to architectural coatings can improve coating adhesion, scrub resistance, weather resistance, strength hardness, toughness, elasticity, anti-aging, anti-bacterial, anti-ultraviolet and other characteristics, significantly improve coatings’ property of self-cleaning, waterproofing, anti-seepage, anti-wear, anti-corrosion, color retention and other properties, so it has a good effect on modified exterior wall coatings.

2. Application of nano-silica in metal protective coatings
The addition of nano-SIO2 and TIO2 can increase the strength of the carbonaceous layer after the expansion of the fire retardant coating and prolong the fire resistance of the steel structure. When adding 1.5% by mass of nano-SIO2, the fire endurance of 110 min can be achieved.

3. Application of nano-silica in plastic coatings
The modified nano silica is beneficial to improve the thermal stability of the composite, delay the thermal oxidative degradation of the polyethylene, and significantly improve the flame retardant performance of the halogen-free flame retardant polyethylene. A material with better mechanical properties and flame retardancy.

4. Application of nano-silica in UV-curable coatings
Nano-silica has extremely strong UV absorption and infrared reflection properties. The spectrophotometer test shows that the absorption rate of ultraviolet light within a wavelength of 400 nm is as high as 70% or more, and the reflectance of infrared light within a wavelength of 400 nm is also more than 70%. It is added to the coating to form a shielding effect on the coating to achieve anti-UV aging and heat aging, and at the same time increase the thermal insulation of the coating.

5. Application of nano-silica in color inkjet paper coating
There are a large number of micropores and cracks on the surface of high gloss color inkjet paper. Primer can significantly improve sheet properties, and nanoscale silica provides high smoothness, absorbency, color density, and image quality.

6. Application of nano-silica in wood coatings
In the waterborne wood coating, the addition of the nano silica gel can improve the hardness of the coating film, improve the water resistance and aging resistance of the coating film, and at the same time improve the blocking resistance of the coating film. In the closed primer, the nano-silica gel has a small particle size and can be easily inserted into fine pores of wood or fiberboard. The pores are filled and sealed, and can be bonded to the substrate after drying and forming. Insoluble in water coating, which has a good sealing effect. A suitable nano-silica sol can be properly blended in the aqueous primer to accelerate the release of moisture in the primer.
It can improve the drying speed, increase the hardness of the coating film, and reduce the cost of the primer. Adding a certain nano-silica sol to the water-based topcoat has obvious improvement in water resistance, anti-blocking and hardness properties.