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,

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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Example Embodiment

[0052]Example 1

[0053]A method for preparing electrochromic liquid crystal fiber by coaxial microfluid spinning method, including the following steps:

[0054](1) Preparation of transparent conductive outer layer injection 1: Disperse 0.05g sodium alginate powder, 0.5g glucose powder, 1.5g silver nanowires (length and diameter of 10μm, 60nm) (Sigma) in 10mL of water and magnetically stirred 10min, prepare uniform injection 1 in which 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(styrene sulfonic acid) ( Sinopharm Shanghai Test Company) was dispersed in 10 mL of water and magnetically stirred for 10 minutes to prepare a uniform injection 2, in which the mass fraction of poly(3,4-ethylenedioxythiophene)-poly(styrene sulfonic acid) relative to water was 0.015wt%;

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

Example Embodiment

[0061]Example 2

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

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

Example Embodiment

[0064]Example 3

[0065]Adjust the 90wt% of the red cholesteric liquid crystal in the injection 3 of Example 1 to 70wt% of the yellow cholesteric liquid crystal (U10-006G-580, Shijiazhuang Chengzhi Yonghua Company), and the others were prepared in the same manner as in Example 1. Steps to prepare electrochromic liquid crystal microfibers.

[0066]The electro-chromic liquid crystal fiber prepared above was tested for photoelectric performance (see Table 1) and water and solvent resistance (see Table 2). It can be seen from the test results that 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 decrease, 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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