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Bio-based all-fiber self-powered multifunctional electronic skin and preparation method thereof

An electronic skin, self-powered technology, applied in the direction of fiber chemical characteristics, conductive/antistatic filament manufacturing, conjugated synthetic polymer artificial filament, etc., can solve the problem of incomplete use of multifunctional electronic skin, complicated production process, expensive Manufacturing and other issues, to achieve the effect of humidity and temperature sensitivity and good detection range, high air permeability, excellent pressure

Pending Publication Date: 2022-03-18
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this approach often requires etching or mold inversion, resulting in a complicated production process and expensive fabrication
In addition, since the pollution caused by battery electrolyte is often harmful to health, and the battery replacement, charging and recycling will bring many inconveniences, the multifunctional electronic skin cannot be fully powered by traditional batteries.

Method used

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  • Bio-based all-fiber self-powered multifunctional electronic skin and preparation method thereof
  • Bio-based all-fiber self-powered multifunctional electronic skin and preparation method thereof
  • Bio-based all-fiber self-powered multifunctional electronic skin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] (1) Preparation of polyvinyl alcohol / polyvinylidene fluoride negative friction layer: Dissolve polyvinyl alcohol in deionized water at 80°C, stir for 3 h, and the concentration is 18 wt%. Add 1 wt% polyvinylidene fluoride powder and stir for 10 h to obtain a uniform dispersion with a concentration of 19 wt% polyvinyl alcohol / polyvinylidene fluoride. Fix the copper mesh on the collector at a distance of 10 cm from the needle, uniformly covered by polyvinyl alcohol / polyvinylidene fluoride nanofibers. The electrospinning machine was kept under certain spinning conditions during the working process, and the feed rate was 1 mL∙h –1 . Finally, the samples were dried in an oven at 30 °C for 6 h to remove residual solvents.

[0067] (2) Preparation of the positive friction layer of collagen aggregates and assembly of the self-generating pressure-sensitive layer: 5 wt% collagen aggregates were dissolved in hexafluoroisopropanol and stirred at 30°C for 40 min. Electrospinning ...

Embodiment 2

[0072] (1) Preparation of polyvinyl alcohol / polyvinylidene fluoride negative friction layer: Dissolve polyvinyl alcohol in deionized water at 90 °C, stir for 5 h, and the concentration is 9 wt%. Add 9 wt% polyvinylidene fluoride and stir for 20 h to obtain a uniform dispersion of 18 wt% polyvinyl alcohol / polyvinylidene fluoride. Fix the copper mesh on the collector at a distance of 15 cm from the needle, uniformly covered by polyvinyl alcohol / polyvinylidene fluoride nanofibers. The electrospinning machine was kept under certain spinning conditions during the working process, and the feed rate was 1.5 mL∙h –1 . Finally, the samples were dried in an oven at 50 °C for 3 h to remove residual solvents.

[0073] (2) Preparation of the positive friction layer of collagen aggregates and assembly of the self-generating pressure-sensitive layer: 10 wt% collagen aggregates were dissolved in hexafluoroisopropanol and stirred at 40°C for 30 min. Electrospinning under certain environment...

Embodiment 3

[0078] (1) Preparation of polyvinyl alcohol / polyvinylidene fluoride negative friction layer: Dissolve polyvinyl alcohol in deionized water at 100 °C, stir for 1 h, and the concentration is 1 wt%. Add 17 wt% polyvinylidene fluoride powder and stir for 10-30 h to obtain a uniform dispersion of 18 wt% polyvinyl alcohol / polyvinylidene fluoride. Fix the copper mesh on the collector at a distance of 20 cm from the needle, uniformly covered by polyvinyl alcohol / polyvinylidene fluoride nanofibers. The electrospinning machine was kept under certain spinning conditions during the working process, and the feed rate was 2 mL∙h –1 . Finally, the samples were dried in an oven at 70 °C for 1 h to remove residual solvents.

[0079] (2) Preparation of the positive friction layer of collagen aggregates and assembly of the self-generating pressure-sensitive layer: 18 wt% collagen aggregates were dissolved in hexafluoroisopropanol and stirred at 50°C for 10 min. Electrospinning under certain e...

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Abstract

According to the bio-based all-fiber self-powered multifunctional electronic skin and the preparation method thereof, the bio-inspiration type multifunctional electronic skin with multiple layers of nanofibers is constructed based on a triboelectricity generator, and the bio-inspiration type multifunctional electronic skin can convert mechanical energy of a human body into electric energy and is used for detecting external stimulation such as pressure, temperature and humidity at the same time. A negative friction layer of the electronic skin is made of polyvinyl alcohol / polyvinylidene fluoride composite nanofibers obtained through the electrostatic spinning technology and has a typical three-dimensional network space structure and a microscopic bead chain structure, a positive electrode layer is made of collagen aggregate nanofibers obtained through the electrostatic spinning technology, and the collagen aggregate nanofibers are of a three-dimensional porous structure and a microscopic protruding structure. The electronic skin simultaneously realizes excellent pressure, humidity and temperature responsiveness, integrates the advantages of intelligence, multiple functions, flexibility, sensitivity, air permeability, biocompatibility and the like, and can be used as intelligent electronic skin in the fields of intelligent robots, skin, medical health detection and the like.

Description

technical field [0001] The invention relates to the technical field of electronic skin manufacturing, in particular to a bio-based full-fiber self-powered multifunctional electronic skin and a preparation method thereof. Background technique [0002] As the human body, the skin is the most suitable for the above-mentioned problems. It can realize self-power supply function by generating electricity through nano-triboelectric generators. Electronic skin that is multifunctional and sensitive to multiple stimuli. In addition, in order to make the electronic skin have a good physiological experience and wearing comfort when it is attached to the skin surface, easily degradable biomaterials such as collagen can be used to provide good biocompatibility. At the same time, electrospinning technology is used to prepare nanofibers. The structure realizes its good air permeability. Based on the above characteristics, the electronic skin can be widely used in medical and wearable devic...

Claims

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Application Information

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IPC IPC(8): A61B5/11A61B5/00D01F4/00D01F1/09D01F8/10G01D21/02
CPCA61B5/6802A61B5/1118G01D21/02D01F8/10D01F4/00D01F1/09D01D1/02D01F6/50D01F6/48D01D5/0038D01F1/10G01K13/00A61B5/01A61B5/441G01L1/005A61F2/105A61F2240/001A61B2560/0242A61L27/60G01L1/18
Inventor 王学川岳欧阳刘新华侯梦迪郑漫辉吕丽红
Owner SHAANXI UNIV OF SCI & TECH
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