Composite electrochromic material as well as preparation method and application thereof

Abstract

The invention discloses a composite electrochromic material as well as a preparation method and application thereof. The composite electrochromic material comprises a core layer, a skin layer with an electrochromic function and a light-permeable flexible high polymer material protection layer which are sequentially arranged, wherein the core layer material comprises a conductive mixture with fluidity; the conductive mixture comprises liquid metal and a carboxylated carbon nanotube; and the mass ratio of the carboxylated carbon nanotube to the liquid metal is (2-5): 100, the length of the carboxylated carbon nanotube is 15-30 [mu]m, the inner diameter of the carboxylated carbon nanotube is 6-10 nm, and the outer diameter of the carboxylated carbon nanotube is 12-20 nm. The preparation method comprises the following steps of performing spinning by adopting a three-channel nozzle co-extrusion method to prepare hollow double-layer fiber which comprises a skin layer and a protective layer and is provided with a cavity, and injecting the conductive mixture into the cavity of the hollow double-layer fiber. The material has excellent deformability, a stable and sensitive color changing function and a controllable deformation degree, still has a relatively stable color changing function under the condition of serious deformation, is good in fatigue resistance and is suitable for preparing intelligent textiles.

Description

technical field [0001] The invention belongs to the technical field of textile materials, flexible electronic materials and electrochromic materials, in particular relates to intelligent textile materials, in particular to a composite electrochromic material and its preparation method and application. Background technique [0002] With the continuous development of smart textile materials, people have higher and higher requirements for the comfort and functionality of smart textiles. Electrochromic materials can undergo stable and reversible color changes under the action of an external electric field, and have good application value in electrochromic devices, for example, they can give textile materials the function of color change, and form different color patterns according to needs, etc. . However, some existing materials with electrochromic function have the following defects more or less in the process of textile processing or actual wearing: 1. The electrochromic fun...

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Problems solved by technology

However, some existing materials with electrochromic function have the following defects more or less in the process of textile processing or actual wearing: 1. The electrochromic function is not durable. With repeated processing or wearing, the electrochromic The color changing function is constantly missing; 2. The electrochromic material is easily damaged and not resistant to fatigue; 3. The flexibility of the electrochromic material is not good; 4. As the deformation increases, the electrochromic function fails; etc.

Although this electrochromic material can achieve better electrochromic function, due to the existence of metal filament fibers, its flexibility is not enough to make the textile obtain excellent bending deformation function, and when the electrochromic fiber undergoes a large deformation , the coated electrochromic electrolyte layer has the potential to peel off

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