Research And Development Of Durable Nano-antibacterial Fabric

In order to improve the antibacterial performance of nano-TiO₂ under visible light and dark conditions,using silver and nitrogen as doping elements,a rapid sol-gel method was adopted.A series of Ag-N-TiO₂ antibacterial agents were prepared by changing the doping quantity of silver nitrate and maintaining the molar ratios of urea butyl titan ate1:1.UV-visible diffusive reflectance spectroscope?UV-Vis DRS?and Fourier transform infrared?FT-IR?analysis were used to characterize the spectral properties and microstructures.Through the antibacterial performance test,the optimal antibacterial agents were explored.The results indicate that the prepared Ag-N-TiO₂ agent performs excellent antibacterial properties,when the molar ratio of silver nitrate,urea and butyl titan ate is0.001:1:1 at a heat treatment of 125°C.Under conditions of visible light and darkness,the antibacterial rates against Escherichia coli were 98.73%and 96.6%,respectively;and the antibacterial rates against Staphylococcus aurous were 99.96%and 99.97%,respectively,In order to improve the fastness of Ag-N-TiO₂ agent and the cotton fabric,and the problem that textiles are not resistant to high temperatures,a quick sol-gel method was adopted.The prepared nano-sol formed a gel film on the the cotton fiber in a short time,and through heat treatment,they were firmly bonded by a covalent bond or van der Waals force,which improved the antibacterial durability of the fabric.Through the antibacterial performance test,the optimal preparation and the antibacterial durability of the antibacterial fabric were explored.Scanning electron microscopy?SEM?was used to observe the surface morphology of the finished fabric.The experimental results indicate that the surface of the finished fabric is evenly attached with a layer of Ag-N-TiO₂ antibacterial film;after 50standard washings,the antibacterial film was slightly damaged due to mechanical external forces,but the whole was still intact,and the damaged antibacterial film was still adsorbed on the fibers and continues to exert its antibacterial effects.The optimal preparation is 3min load time and 125min heat treatment for 25min.After 50 standard washings,the antibacterial fabric still has excellent antibacterial properties.Under the visible light and dark conditions,the antibacterial rate against Escherichia coli were 98.97%and 98.88%,respectively;the antibacterial rates against Staphylococcus aureus were 98.96%and 97.60%,respectively.The antibacterial level reached AAA level.