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Intelligent color-changing liquid crystal fabric, its preparation method and application

A fabric and liquid crystal technology, applied in the fields of fine chemicals and materials science, can solve the problem of inability to solve the problem of discoloration stimulus, and achieve the effects of excellent optical/electrothermal properties, bright and changeable colors, and controllable Joule heating properties.

Active Publication Date: 2021-12-28
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above studies still cannot solve the problem of the source of color change stimulus

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Intelligent color-changing liquid crystal fabric, its preparation method and application
  • Intelligent color-changing liquid crystal fabric, its preparation method and application
  • Intelligent color-changing liquid crystal fabric, its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A method for preparing a photoelectric thermal multi-stimulus source responsive color-changing liquid crystal smart fabric, comprising the following steps:

[0037] (1) The cotton fabric to be modified was ultrasonically cleaned in isopropanol, absolute ethanol, and water for 15 minutes to remove surface oil stains, and airtightly dried in a vacuum oven. Take 156.6mg tris(hydroxymethyl)aminomethane hydrochloride (Tris HCl) in a 250mL beaker with a stirring bar, add 100mL deionized water, and adjust the pH of the system to 8.5 with 1M NaOH solution, and stir at 25°C uniform. Then add 300 mg of dopamine hydrochloride (DPA), stir evenly, add the cotton fabric substrate to be modified, and continue stirring for 24 hours, so that dopamine hydrochloride generates polydopamine (PDA) in situ on the surface of the substrate. After the reaction, take out the modified substrate, squeeze out the excess reaction solution, and wash off the PDA with weak adhesion with deionized water...

Embodiment 2

[0046] Adjust the number of times of self-assembly in the steps of Example 1 to 10, 15, 25, and 50 times, and follow the same preparation steps as in Example 1 to prepare the color-changing liquid crystal fabric.

Embodiment 3

[0057] Adjust the mass fraction of the polymethyl methacrylate in Example 1 relative to the cholesteric liquid crystal to be 100wt% (the PMMA quality is 1.0g), 50wt%, 200wt%, and others make color-changing liquid crystal fabrics according to the same preparation steps of Example 1 .

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Abstract

The invention discloses an intelligent color-changing liquid crystal fabric, a preparation method and application thereof, and belongs to the technical fields of fine chemical industry and material science. The invention adopts the method of electrostatic layer-by-layer self-assembly and screen printing coating to prepare an intelligent color-changing liquid crystal fabric with a two-dimensional Mxene material as a photoelectric thermal multi-stimulus source layer and a cholesteric liquid crystal microcapsule coating as a thermochromic layer. The intelligent color-changing liquid crystal fabric prepared by the method of the present invention can reverse color under the stimulation of electric field, infrared light and temperature, not only has bright and changeable colors, but also has sensitive response, and has good solvent resistance and water resistance.

Description

technical field [0001] The invention relates to an intelligent color-changing liquid crystal fabric, its preparation method and application, and belongs to the technical fields of fine chemical industry and material science. Background technique [0002] Wearable smart color-changing textiles have gradually become a research hotspot due to their great potential in healthcare, Internet of Things, and biosensing applications. The thermochromic material refers to a material that can produce a corresponding color change when the temperature of the external environment changes. According to the properties and composition of thermochromic materials, they can be divided into three categories: liquid crystal thermochromic materials, organic thermochromic materials and inorganic thermochromic materials. Liquid crystal temperature-responsive color-changing materials mainly refer to cholesteric liquid crystals, whose molecules are arranged in a helical shape. When the helical pitch is...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M23/12D06M13/328D06M15/61D06M11/74
CPCD06M23/12D06M13/328D06M15/61D06M11/74
Inventor 付少海张丽平盛明非王春霞李敏
Owner JIANGNAN UNIV
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