Preparation And Properties Of Photonic Crystal Coloration Carbon Fiber Substrates

Carbon fiber is known as the "black gold" of the 21 st century.However,due to its chemical inertness,traditional coloring methods like dyeing with pigments suffer from complicated process and single color tone when coloring carbon fiber,limiting the application of carbon fiber in colored industrial products.Photonic crystal structured color,the visual result of light diffraction with crystal,presents high saturation,high brightness and iridescence effect.in addition,as a physical coloring method,it is not selective to the substrate,so it has attracted much attention from researchers.In this paper,constructing photonic crystal coloring structures on the surface of different types of carbon fiber substrates was proposed,and an effective method to construct photonic crystals was established.an effective way to enhance the stability of photonic crystals was explored,and a one-step method was applied to achieve structural coloring and high hydrophobicity of carbon fiber substrates simultaneously.The research results provide strategic supports for the coloration and functionality of carbon fibers.The research in this paper includes the following three aspects:(1)the construction of photonic crystal color-generating structures on carbon fiber sheets.The properties of poly(styrene-methacrylic acid)(P(St-MAA))colloidal microspheres were analyzed;the effects of mass fraction of assembly solution and fabric density on the structural color effect of carbon fiber fabric were investigated;the iridescent effect of structural colorgenerating carbon fiber sheets was observed;the color fastness of structural colorgenerating carbon fiber sheets encapsulated with polydimethylsiloxane(PDMS)was examined.(2)Research on the construction of photonic crystal color-generating structures on carbon fiber/polyester blended yarns.the effects of assembly solution mass fraction and self-assembly temperature on the structural color effect of structural color-generating yarns were investigated;the iridescence effect of structural colorgenerating yarns was analyzed;the process of constructing photonic crystals on the surface of yarns by colloidal microspheres was discussed;the color durability of PDMS-encapsulated structural color-generating yarns was studied.(3)Preparation of double-sided highly hydrophobic structural color-generating carbon fiber fabrics through one step.The properties of poly(trifluoroethyl methacrylate)(PTFEMA)colloidal microspheres were analyzed;the structural color effect,hydrophobicity and iridescence effects on the front and back sides of the structured color-generated carbon fabrics were observed;the hydrophobicity mechanism of the structured color-generated carbon fabrics was described.The results show that:(1)P(St-MAA)colloidal microspheres are of uniform particle size,good sphericity and present typical core-shell structure;when the mass fraction of assembly solution is 10%,it can construct high brightness photonic crystal color-generating structure in high-density carbon fiber fabric;the iridescence effect of structural color-generating carbon fiber plate is obvious;the structural color-generating carbon fiber plate encapsulated by PDMS exhibits excellent color durability.(2)When the mass fraction of assembly solution is 70% and the self-assembly temperature is40 ℃,the structured colorful carbon fiber/polyester blended yarn can be produced;the structured coloration yarn has significant iridescence effect;the process of constructing photonic crystals on the surface of yarn by colloidal microspheres is summarized as preparatory stage,stacking aggregation and completion stage;the structured colorgenerating yarn encapsulated by PDMS has excellent color durability.(3)The PTFEMA colloidal microspheres are of clear shape and good monodispersity;the structural color of the front and back sides of the structured color-generating carbon fiber fabric is bright and vivid,with excellent hydrophobic effect and obvious iridescent effect;the hydrophobicity of the structured color-generating carbon fiber fabric is mainly due to the loading of PTFEMA which reduces the surface energy of the fabric and fills the inter-fiber voids.