Elastic electrical drive thermochromic sensing fiber with skin-core structure and preparation method thereof

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

Active Publication Date: 2022-03-22
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 electrical drive thermochromic sensing fiber with skin-core structure and preparation method thereof
  • Elastic electrical drive thermochromic sensing fiber with skin-core structure and preparation method thereof
  • Elastic electrical drive thermochromic sensing fiber with skin-core structure and preparation method thereof

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, in particular to a skin-core structure elastic electrically driven thermochromic sensing fiber and a preparation method thereof. First, through pretreatment, the adhesion of the fiber surface is improved, and then the graphene stripped from the cellulose nanocrystals is orderly coated on the polyurethane fiber substrate by simple ultrasonic soaking to prepare flexible, stretchable and sensitive conductive fibers. Then, the polyurethane nanofibers containing different thermochromic inks were electrospun onto the surface of the elastic fibers to prepare the skin-core structure elastic electrically driven thermochromic sensing fibers. This new skin-core composite structural fiber has excellent mechanical properties and electrothermal properties, and uses electromechanical synergy to enhance thermochromism and 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 Patents(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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