A kind of preparation method of coaxial electrothermochromic liquid crystal fiber

A technology of liquid crystal fiber and electric heating, which is applied in the fields of fine chemical industry and material science, can solve the problems of color-changing textile fabric use restrictions and the inability to meet the requirements of textiles for breathable and flexible wear, and achieve high driving voltage, reduce driving voltage, and expand The effect of application range

Active Publication Date: 2022-03-25
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above methods cannot meet the requirements of breathable and flexible textiles and the driving voltage is lower than the human body's continuous contact safety voltage of 12V (GB3805-83).
Therefore, the use on color-changing textile fabrics that fit the human body will still be subject to greater restrictions.

Method used

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  • A kind of preparation method of coaxial electrothermochromic liquid crystal fiber
  • A kind of preparation method of coaxial electrothermochromic liquid crystal fiber
  • A kind of preparation method of coaxial electrothermochromic liquid crystal fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] A method for preparing electrothermochromic liquid crystal fibers by a coaxial microfluidic spinning method, comprising the steps of:

[0052] (1) Preparation of black conductive inner layer injection 1: 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%;

[0053] (2) Preparation of electrothermochromic liquid crystal injection 2: add 0.05 g of sodium alginate powder, 0.5 g of glucose powder, and 9 g of red cholesteric liquid crystal (U10-006G-680, Shijiazhuang Chengzhi Yonghua Company) into 10 mL of water Stir magnetically for 10 minutes, and prepare uniform injection 2, wherein the mass fraction of red cholesteric liquid crystal relative to water is 90...

Embodiment 2

[0059] Adjust the red cholesteric liquid crystal of 90wt% in the injection 2 of embodiment 1 to the blue cholesteric liquid crystal (U10-006G-480, Shijiazhuang Chengzhi Yonghua Company) of 80wt%, conductive polymer in the injection 1 The two-dimensional Mxene dispersion is used, wherein the mass fraction of the Mxene dispersion is 0.3 wt %; other preparation steps are the same as in Example 1 to prepare electrothermochromic liquid crystal microfibers.

[0060] The photoelectric performance test (see Table 1) and the water and solvent resistance performance test (see Table 2) of the electrothermochromic liquid crystal fiber prepared above were carried out. As can be seen from the test results: for the electrothermochromic liquid crystal fiber obtained in Comparative Example 1, as the concentration of the cholesteric liquid crystal decreases, the thickness of the liquid crystal layer becomes thinner, and the required electrothermochromic driving voltage increases thereupon .

Embodiment 3

[0062] Adjust the red cholesteric liquid crystal of 90wt% in the injection 2 of embodiment 1 to be adjusted 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 electrothermochromic liquid crystal microfibers.

[0063] The photoelectric performance test (see Table 1) and the water and solvent resistance performance test (see Table 2) were carried out on the electrothermochromic liquid crystal fiber prepared above. As can be seen from the test results: for the electrothermochromic liquid crystal fibers obtained in Comparative Example 1, as the concentration of cholesteric liquid crystals continues to decrease, the thickness of the liquid crystal layer also continues to thin, and the required electrothermochromic driving voltage also continues to increase. improve.

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Abstract

The invention relates to a preparation method of a coaxial electrothermochromic liquid crystal fiber, which belongs to the technical fields of fine chemical industry and material science. The present invention adopts the coaxial microflow spinning method to prepare the electrothermochromic liquid crystal fiber with black conductive polymer as inner conductive layer and polymer dispersed cholesteric phase liquid crystal as thermochromic layer, wherein black conductive layer, cholesteric phase The mass ratio of the liquid crystal layer is 100:5-30. The electrothermochromic liquid crystal fiber prepared by the method of the present invention can change color reversibly under electric field stimulation, and can realize a certain color-changing state in a continuous and stable state under the condition of power failure, not only bright and changeable color, but also low driving voltage, It is lower than 3.9V (far lower than the 12V safe voltage for human body continuous contact specified in the national standard GB3805-83 "Safety Voltage"), and has good solvent resistance and water resistance, which meets the application in the field of wearable color-changing clothing.

Description

technical field [0001] The invention relates to a preparation method of a coaxial electrothermochromic liquid crystal fiber, which belongs to the technical fields of fine chemical industry and material science. Background technique [0002] With the development of the textile industry, textiles with fashionable effects and intelligent responses are gradually favored by consumers. Thermochromic materials can be used in anti-counterfeiting, medical treatment, clothing and sensing and other fields. In recent years, because electric heating paints can be applied to electronic equipment, military fields, household fields, etc., the research on electric heating paints has gradually developed rapidly. The electrothermal color-changing fabric prepared based on the combination of electric heating paint and thermochromic material not only has the performance of general fabrics, but also can intelligently sense changes in external conditions, and then process information through self-p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F8/10D01F8/16D01F8/18D01F1/10C09K19/54
CPCD01F8/10D01F8/16D01F8/18D01F1/10C09K19/542C09K2219/01
Inventor 付少海张丽平盛明非关玉田安丽王春霞
Owner JIANGNAN UNIV
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