Construction And Properties Of Washable Photonic Crystal Fiber Fabrics

As a kind of structural colored material,photonic crystals（PCs）have been applied to fiber coloring due to their high saturation,high brightness,and iridescence effect.Compared with traditional dyes,PCs have the advantages of bright color,no fading,and being environmentally friendly.However,when PCs are used for fiber and fabric dyeing,they are usually located on the fiber surface.Thus,the stability of PC coatings was not satisfied when friction,bending or washing.Resulting in the low color fastness of the PC-coated fabrics,which greatly limits their application in fabric coloring.Therefore,different interactions between fibers and fabrics are established based on the regulation of the interaction between the photonic crystal coating and the fabric,to further improve the washing resistance and friction resistance of the fabric.More-over,improving the hydrophobicity and wash-resistance of fabrics at the same time is also dif-ficult.To solve the above-mentioned questions,we designed the following works:Firstly,to improve the interaction between the PC coatings and the fabrics,nanoparticles,polymers,and fabrics were synthesized and modified.Monodisperse SiO₂ nanoparticles were synthesized and their particle size was controlled by adjusting the ratio of ammonia and deion-ized water.Secondly,PCs were constructed on the surface of fiber fabric using monodisperse SiO₂and low glass temperature PDMS by dip-coating method.To improve the washable resistance of PC-coated fabric,MCR-XT11 was used to modify SiO₂ nanoparticles.Furthermore,by reg-ulating the formation process of PCs,the distribution of nanoparticles and polymers on the surface of the fabrics was controlled,which also influences the hydrophobicity and anti-fouling properties of the fabrics.To verify the effectiveness of the method,the influence of the chemical composition,weaving mode,surface density,and initial color of the fabric on the structure color,washable resistance,elasticity,softness,smoothness,and air permeability of the PCs were sys-tematically investigated.Finally,to further improve the washable resistance of the PC-coated fabric,TA and PBA were introduced to construct a dual network structure based on hydrogen bonds and dynamic crosslinking between the fabric and the PCs.Monodisperse SiO₂ nanoparticles,PDMS,and fiber fabrics were modified by PBA and TA to form a dual network structure.The structural color,washable resistance,and friction resistance of PC-coated fabric were further studied.The results showed that the washing resistance of the fabric when TA content was 0.030%（SiDT30）was the best.In conclusion,a method for improving the interaction between PC coating and fiber fab-rics was proposed,which providing research and experimental basis for the construction of washable and friction resistant PC-coated fiber fabrics.