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Elastic electrically-driven thermochromic sensing fiber with skin-core structure and preparation method of elastic electrically-driven thermochromic sensing fiber

A thermochromic, skin-core structure technology, applied in the direction of fiber type, fiber processing, fiber chemical characteristics, etc., can not meet the development requirements of device flexibility and wearable, cannot be directly applied in the field of flexible intelligent color changing, does not have Stretchability and other issues, to achieve the effects of excellent electrical conductivity, excellent discoloration properties, and excellent mechanical properties

Active Publication Date: 2021-03-19
WUHAN TEXTILE UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, electrochromic devices include color-changing layers, electrolyte layers, and electrode layers. The construction process is complex and costly, and the multi-component assembly structure makes it almost non-stretchable, which cannot meet the development requirements of flexible and wearable devices.
The principle and device structure of thermochromic materials are relatively simple, but an external heat source is required, and the tensile properties are usually poor, so they cannot be directly applied to the field of flexible intelligent color change

Method used

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  • Elastic electrically-driven thermochromic sensing fiber with skin-core structure and preparation method of elastic electrically-driven thermochromic sensing fiber
  • Elastic electrically-driven thermochromic sensing fiber with skin-core structure and preparation method of elastic electrically-driven thermochromic sensing fiber
  • Elastic electrically-driven thermochromic sensing fiber with skin-core structure and preparation method of elastic electrically-driven thermochromic sensing fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) Pretreatment of polyurethane fiber

[0036] The polyurethane fibers were ultrasonically cleaned with ethanol for 15 minutes to remove surface pollutants. Then, the fibers were immersed in N,N-dimethylformamide solution (DMF) for 1.5 h to make them swell.

[0037] (2) Tannic acid-iron ion surface modification

[0038] Prepare 100mL Tris-HCl (0.01mol / L) buffer solution at room temperature, adjust the pH to 8.3 with NaOH; put the fibers treated in (1) above into 90mL ultrapure water, add 0.8mL Ferric chloride (0.1g / L) was sonicated for 9s to disperse evenly in the solution, then 0.8mL of tannic acid (0.4g / L) was added and sonicated for 8s to be evenly dispersed in the solution, and finally 100mL was added Tris-HCl buffer solution and sonication for 50s.

[0039] (3) Preparation of graphene / polyurethane conductive composite fiber

[0040] Submerge the fabric fibers treated in the above step (2) in 15mL of graphene solution (CNC:Graphite=1:1mg / mL) exfoliated by cellu...

Embodiment 2

[0044] (1) Pretreatment of polyurethane fiber

[0045] The polyurethane fibers were ultrasonically cleaned with ethanol for 20 min to remove surface pollutants. Then, the fibers were immersed in N,N-dimethylformamide solution (DMF) for 2 h to make them swell.

[0046] (2) Tannic acid-iron ion surface modification

[0047] Prepare 100mL Tris-HCl (0.01mol / L) buffer solution at room temperature, adjust the pH to 8.5+0.2 with NaOH; put the fibers treated in (1) above into 100mL ultrapure water, add 1mL of ferric chloride (0.1g / L) was ultrasonically treated for 10s to disperse evenly in the solution, then 1mL of tannic acid (0.4g / L) was added and ultrasonically treated for 10s to be evenly dispersed in the solution, and finally 100mL of Tris-HCl buffer solution and sonication for 60s.

[0048] (3) Preparation of graphene / polyurethane conductive composite fiber

[0049] Submerge the fabric fibers treated in the above step (2) in 20mL of graphene solution (CNC:Graphite=1:1.3mg / mL...

Embodiment 3

[0053] (1) Pretreatment of polyurethane fiber

[0054] The polyurethane fibers were ultrasonically cleaned with ethanol for 25 min to remove surface pollutants. Then, the fibers were immersed in N,N-dimethylformamide solution (DMF) for 2.5 h to make them swell.

[0055] (2) Tannic acid-iron ion surface modification

[0056] Prepare 100mL Tris-HCl (0.01mol / L) buffer solution at room temperature, adjust the pH to 8.7 with NaOH; put the fibers treated in (1) above into 110mL ultrapure water, add 1.2mL Ferric chloride (0.1g / L) was sonicated for 12s to disperse evenly in the solution, then 1.2mL of tannic acid (0.4g / L) was added and sonicated for 11s to be evenly dispersed in the solution, and finally 100mL was added Tris-HCl buffer solution and sonication for 70s.

[0057] (3) Preparation of graphene / polyurethane conductive composite fiber

[0058] Submerge the fabric fibers treated in the above step (2) in 25mL of graphene solution (CNC:Graphite=1:1.5mg / mL) exfoliated by cell...

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Abstract

The invention belongs to the technical field of functional electrically-driven thermochromic yarns, and particularly relates to an elastic electrically-driven thermochromic sensing fiber with a skin-core structure and a preparation method of the elastic electrically-driven thermochromic sensing fiber. The preparation method comprises the following steps that firstly, the adhesive force of the surface of the fiber is improved through pretreatment, and then a polyurethane fiber substrate is orderly coated with graphene after cellulose nanocrystal stripping through simple ultrasonic soaking, so as to prepare a flexible stretchable sensitive conductive fiber; and then, the polyurethane nanofibers containing different thermochromic inks are electrospun onto the surfaces of elastic fibers to prepare the elastic electrically-driven thermochromic sensing fiber with the skin-core structure. The novel skin-core composite structure fiber has excellent mechanical property and electric heating property, thermochromism is enhanced by utilizing force-electricity cooperation, and the elastic electrically-driven thermochromic sensing fiber is durable.

Description

technical field [0001] The invention belongs to the technical field of functional electrically driven thermochromic fibers, in particular to a skin-core structure elastic electrically driven thermochromic sensing fiber and a preparation method thereof. Background technique [0002] When intelligent color-changing materials are stimulated by light, electricity, heat, etc., their chemical structure, electronic structure, crystal phase structure, etc. will change, resulting in obvious color changes. Emerging fields such as fabrics have broad application prospects. Among them, photochromic materials require an additional light source device, and a specific wavelength is used for irradiation excitation in a certain direction, and the application range is relatively limited. Electrochromism is the color change of the optical properties of the material under the action of an external electric field, and the color change of the material can be adjusted by controlling the magnitude ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F8/16D01F1/10D01F1/09D01D5/34D06M11/28D06M13/238D06M101/30
CPCD01F8/16D01F1/10D01F1/09D01D5/34D06M13/238D06M11/28D06M2101/30
Inventor 冉建华许锐毕曙光蔡光明程德山姚金波
Owner WUHAN TEXTILE UNIV
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