Intelligent color-changing liquid crystal fabric and preparation method and application thereof

A fabric and liquid crystal technology, applied in the fields of fine chemical industry and material science, can solve the problem of unresolved discoloration stimulus, and achieve excellent light/electrical heating performance, controllable Joule heating performance, and good light transmission

Active Publication Date: 2021-06-29
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 and preparation method and application thereof
  • Intelligent color-changing liquid crystal fabric and preparation method and application thereof
  • Intelligent color-changing liquid crystal fabric and preparation method and application thereof

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 and a preparation method and application thereof, and belongs to the technical field of fine chemical engineering and material science. The intelligent color-changing liquid crystal fabric which takes a two-dimensional Mxene material as a photoelectric-thermal multi-stimulus layer and a cholesteric liquid crystal microcapsule coating as a thermochromic layer is prepared by adopting a static layer-by-layer self-assembly and screen printing coating method. The intelligent color-changing liquid crystal fabric prepared by the method can reversibly change color under the stimulation of an electric field, infrared light and temperature, is bright and changeable in color and sensitive in 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

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Application Information

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Patent Type & Authority Applications(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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