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Method for preparing electrochromic fibers without additional electrodes by coaxial microfluid spinning method

An electrochromic, liquid crystal fiber technology, applied in the fields of fine chemical industry and material science, can solve the problems such as the inability to meet the breathable and flexible wearing requirements of textiles, the coloring of liquid crystals, and the inability to get rid of the application limitations of external electrodes, and achieve controllable optical appearance, driving The effect of low voltage and easy large-scale production

Active Publication Date: 2021-01-26
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above methods are not suitable for the preparation of electrochromic liquid crystal fibers, because liquid crystals are easily doped in the polymer matrix during the preparation of microcapsules, resulting in staining, and the microcapsule coating method still cannot get rid of the application of external electrodes. Restricted, cannot meet the wearing requirements of textiles breathable and flexible

Method used

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  • Method for preparing electrochromic fibers without additional electrodes by coaxial microfluid spinning method
  • Method for preparing electrochromic fibers without additional electrodes by coaxial microfluid spinning method
  • Method for preparing electrochromic fibers without additional electrodes by coaxial microfluid spinning method

Examples

Experimental program
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Effect test

Embodiment 1

[0053] A method for preparing electrochromic liquid crystal fibers by a coaxial microfluidic spinning method, comprising the steps of:

[0054] (1) Preparation of transparent conductive outer layer injection 1: Disperse 0.05g sodium alginate powder, 0.5g glucose powder, 1.5g silver nanowire (length, diameter 10μm, 60nm) (Sigma company) in 10mL water with magnetic stirring 10min, and prepare uniform injection 1, wherein the mass fraction of silver nanowires relative to water is 0.15wt%;

[0055] (2) Preparation of black conductive inner layer injection 2: 0.05g sodium alginate powder, 0.5g glucose powder, 0.15g poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonic acid)( Sinopharm Shanghai Test Company) was dispersed in 10mL water with magnetic stirring for 10min, and prepared into uniform injection 2, wherein the mass fraction of poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonic acid) relative to water was 0.015wt%;

[0056] (3) Preparation of electrochromic liquid cryst...

Embodiment 2

[0062] Adjust the red cholesteric liquid crystal of 90wt% in the injection 3 of embodiment 1 to the blue cholesteric liquid crystal of 80wt% (U10-006G-480, Shijiazhuang Chengzhi Yonghua Company), the metal nanowire in the injection 1 Copper nanowires are used, wherein the mass fraction of copper nanowires is 0.3 wt %; other steps are the same as in Example 1 to prepare electrochromic liquid crystal microfibers.

[0063] The photoelectric performance test (see Table 1) and the water and solvent resistance performance test (see Table 2) of the electrochromic liquid crystal fiber prepared above were carried out. As can be seen from the test results: for the electrochromic liquid crystal fiber obtained in Comparative Example 1, as the concentration of the cholesteric liquid crystal decreases, the thickness of the liquid crystal layer also becomes thinner, and the required electrochromic driving voltage also increases thereupon. .

Embodiment 3

[0065] Adjust the red cholesteric liquid crystal of 90wt% in the injection 3 of embodiment 1 to the yellow cholesteric liquid crystal of 70wt% (U10-006G-580, Shijiazhuang Chengzhi Yonghua Company), and others are prepared according to the same method of embodiment 1 The steps are to prepare electrochromic liquid crystal microfibers.

[0066] The photoelectric performance test (see Table 1) and the water and solvent resistance performance test (see Table 2) were carried out on the electrochromic liquid crystal fiber prepared above. It can be seen from the test results that for the electrochromic liquid crystal fiber obtained in Comparative Example 1, as the concentration of the cholesteric liquid crystal continues to decrease, the thickness of the liquid crystal layer continues to become thinner, and the required electrochromic driving voltage also continues to increase.

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Abstract

The invention discloses a method for preparing electrochromic fibers without additional electrodes by a coaxial microfluid spinning method, and belongs to the technical field of fine chemical engineering and material science. The electrochromic liquid crystal fiber taking a black conductive polymer as an inner conductive layer, a transparent metal nanowire layer as an outer conductive layer and polymer dispersed cholesteric liquid crystal as an electrochromic layer is prepared by adopting the coaxial microflow spinning method, wherein the mass ratio of the metal nanowire layer to the black conductive layer to the cholesteric liquid crystal layer is (5-30): 100: (5-30). The electrochromic liquid crystal fiber prepared by the method disclosed by the invention can change color reversibly under the stimulation of an electric field, can realize a continuous stable state of a certain color changing state under the condition of power failure, not only is bright and variable in colors and lowin driving voltage which is lower than 23.9 V (lower than 36V of safe voltage of a human body), but also has high solvent resistance and water resistance.

Description

technical field [0001] The invention relates to a method for preparing electrochromic fibers without external electrodes by coaxial microfluid spinning, and belongs to the technical fields of fine chemical industry and material science. Background technique [0002] The ever-increasing demand for technology and individualization has become a new challenge and new trend for the development of the textile and garment industry. Smart textiles refer to a new class of textiles that are based on the basic materials and technical characteristics of textiles, simulate life systems, and have dual functions of perception and reflection. It not only has the performance of general fabrics, but also can intelligently sense changes in external conditions, and then process information through its own perception, issue instructions and execute actions. Among them, electrochromic materials can change the optical properties of textiles (reflectivity, transmittance, absorption rate, etc.) und...

Claims

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Application Information

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IPC IPC(8): D01F8/18D01F1/09D01F1/10D01D5/34D01D5/06C09K9/02
CPCC09K9/02C09K2211/1011C09K2211/1088C09K2211/145D01D5/06D01D5/34D01F1/09D01F1/10D01F8/18
Inventor 付少海张丽平盛明非
Owner JIANGNAN UNIV
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