Preparation of PDMS@P25 composite coating fabric and its photocatalytic and self-cleaning performance
To develop environmentally friendly materials with efficient photocatalytic self-cleaning function,a composite coating was prepared by performing a photo-grafting reaction of polydimethylsiloxane(PDMS)and titanium dioxide(TiO2,P25)in ethyl acetate.This composite coating was then sprayed onto the fabric surface to obtain PDMS@P25 fabric.The influences of PDMS,TiO2,and ethyl acetate on superhydrophobicity of the PDMS@P25 fabric were investigated,and were characterized using contact angle measurements,scanning electron microscopy,transmission electron microscopy,and Raman spectroscopy.The ultraviolet(UV)degradation of the organic dye Nile red by the PDMS@P25 fabric was examined as well.The results show that after 60 minutes of UV irradiation,the PDMS@P25 fabric can completely degrade Nile red in water.At the same time,the PDMS@P25 fabric prevents its surface from being contaminated by sediment and organic dyes such as methyl blue in water.Even if the surface of PDMS@P25 fabric is contaminated with organic dyes like Nile red and methylene blue,it can still degrade the organic dyes under sunlight,showing a self-cleaning capability.The PDMS@P25 fabric exhibits excellent mechanical properties and reusability.Its performance remains unchanged even after 100 cycles of friction and maintains stable photocatalytic performance after 10 cycles of use.Moreover,the fabrication process of this material is simple,the raw materials are environmentally friendly,and the cost is low,making it suitable for large-scale production.
万方数据
维普
