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Nanoparticles are currently used commercially in the textile industries [99] by incorporation or coating with fibers, eg silver nanoparticles are used in t-shirts, sportswear, and undergarments. , socks, etc. [100].
UV blockers in textiles – “Inorganic UV blockers” are more beneficial than “organic UV blockers” because they are non-toxic and chemically stable when exposed to both high temperatures and rays. UV [101-102]. Inorganic UV blockers that are generally semiconductor oxides are TiO2 , ZnO, SiO2 và Al2O3.
Among these semiconductor oxides, titanium dioxide (TiO2) and zinc oxide (ZnO) are commonly used. It is clear that nano-sized “titanium dioxide” and “zinc oxide” are relatively more effective at absorbing and scattering UV radiation and providing better protection against UV rays.
This is because the nanoparticles have a larger surface area per unit mass and volume than conventional materials, resulting in ineffective blocking of UV radiation [101, 103].
Many studies have shown the application of UV treatment for fabrics using nanotechnology. Ultraviolet treatment for cotton fabrics was developed using the sol-gel method. For this, a thin layer of titanium dioxide is formed on the surface of the treated cotton fabric providing excellent UV protection; Efficiency can be maintained even after 50 home laundry times [102].
In addition to titanium dioxide, zinc oxide nanorods 10 to 50 nm in length are also applied to cotton fabrics to provide UV resistance. Previous studies of UV blocking have been effectively completed that fabrics treated with zinc oxide nanorods have been shown to have an excellent UV protection factor (UPF) rating [104 ].
This effect can be further enhanced by various processes for bonding nanoparticles on fabric surfaces. By applying a buffering process, the nanoparticles not only are coated on the surface of the fabric but also penetrate the interstitial fibers and fabric, i.e. some parts of the nanoparticles will penetrate the fabric structure.
Such nanoparticles that are not on the surface may be ineffective at shielding UV rays. It is worthwhile that only the right (side) side of the fabric is exposed to the rays and therefore this surface alone needs to be coated with nanoparticles for better UV protection. Spraying (using compressed air and spray gun) onto the fabric surface with nanoparticles can be an alternative method of applying nanoparticles.
Textile
Nano silver synthesized using A. dubius fabricated on cotton fabrics and perspiration cushion samples exhibit high resistance to Corynebacterium, a perspiration microorganism [88].
The antimicrobial activity of the gauze dish combined with nano silver, made from immature thalli of the genus Anthoceros exhibits antibacterial activity against Pseudomonas aeruginosa [89].
Curcuma longa coated silver nanoparticles exhibiting minimum bactericidal concentration (MBC) for Escherichia coli Type BL-21 at 50mg / L. Fixation on fabric with sterile water has been reported to show reducing activity. was higher than that of polyvinylidene fluoride fixation fabrics [90].
The incorporation of the Azadirachta indica synthetic silver nanoparticles into the cotton fabric produces the antimicrobial effect of the drug against E. coli [91].
Reference source
Applications of Silver nanoparticles in diverse sectors
1 Research Scholar, Department of Biotechnology, IFTM University, Moradabad, India.
2 Professor, Institute of Bio Science and Technology, Shri Ramswaroop Memorial University, Lucknow-Deva Road, India.
