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Flexible force-sensitive sensing fiber with high tensile and high sensitivity and preparation method thereof

A technology of sensing fiber and flexible force, applied in the direction of fiber type, fiber treatment, fiber chemical characteristics, etc., can solve the problems of poor application, poor stretchability, poor stretchability, etc., and achieve excellent skin fit Effect with breathability, fine carry, high stretchability

Active Publication Date: 2017-10-24
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve the problem that current flexible force-sensitive sensing materials cannot be well applied due to poor stretchability and low sensitivity, and provides a high-stretch, high-sensitivity flexible sensor based on a 0D / 1D / 2D three-dimensional collaborative network. The force-sensitive sensing fiber and its preparation method not only solve the problems of poor stretchability and low sensitivity of force-sensitive sensing materials, but also endow the material with spinnable and weavable characteristics, providing further support for the practical application of the material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] 1) Add 45mg of single-walled carbon nanotubes (CNT) and 4.5mg of single-layer graphene (GE) into 90g of dimethylformamide (DMF), disperse ultrasonically at a constant temperature of 25°C, and add 10g of SBS to the dispersion after 30min , stirred at 50°C for 10min, cooled to 25°C for 30min after the SBS was completely dissolved, and continued ultrasonic dispersion for 30min to prepare a 10wt% SBS solution based on a stable dispersion of the hybrid network.

[0034] 2) Under normal temperature conditions, using polyvinyl alcohol (PVA) aqueous solution (concentration 10wt%) as a coagulation bath, using a wet spinning process to prepare SBS composite fibers with a diameter of 200 μm, and placing the SBS composite fibers in silver trifluoroacetate (AgCOOF 3 ) in ethanol solution (15wt%) for 5h, and the swollen sample was placed in hydrazine hydrate vapor (concentration of 5g / m 3 ) at 80°C for 30min.

[0035] 3) After the reduction is completed, wash repeatedly with deioni...

Embodiment 2

[0037] 1) Add 4.5mg of single-walled carbon nanotubes (CNT) and 45mg of single-layer graphene (GE) into 90g of dimethylformamide (DMF), disperse ultrasonically at a constant temperature of 25°C, and add 10g to the dispersion after 30min The SBS was stirred at 50°C for 10 minutes, cooled to 25°C for 30 minutes after the SBS was completely dissolved, and a 10wt% SBS solution based on a hybrid network was prepared that was stably dispersed.

[0038] 2) Under normal temperature conditions, polyvinyl alcohol (PVA) aqueous solution (concentration 10wt%) was used as a coagulation bath, and a wet spinning process was used to prepare SBS composite fibers with a diameter of 200 μm, and the SBS composite fibers were placed in copper trifluoroacetate (Cu(COOF 3 ) 2 ) in ethanol solution (15wt%) for 5h, and the swollen sample was placed in hydrazine hydrate vapor (concentration of 5g / m 3 ) at 80°C for 30min.

[0039] 3) After the reduction is completed, wash repeatedly with deionized wa...

Embodiment 3

[0041] 1) Add 250mg of single-walled carbon nanotubes (CNT) and 250mg of single-layer graphene (GE) into 90g of dimethylformamide (DMF), disperse ultrasonically at a constant temperature of 25°C, add 10g of SBS to the dispersion after 30min, Stir at 50°C for 10 minutes, cool to 25°C and continue ultrasonic dispersion for 30 minutes after the SBS is completely dissolved, and prepare a 10wt% SBS solution based on a stable dispersion of the hybrid network.

[0042] 2) Under normal temperature conditions, using polyvinyl alcohol (PVA) aqueous solution (concentration 10wt%) as a coagulation bath, using a wet spinning process to prepare SBS composite fibers with a diameter of 200 μm, and placing the SBS composite fibers in silver trifluoroacetate (AgCOOF 3 ) in ethanol solution (15wt%) for 5h, and the swollen sample was placed in hydroiodic acid vapor (concentration of 5g / m 3 ) at 80°C for 30min.

[0043]3) After the reduction is completed, wash repeatedly with deionized water to ...

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Abstract

The invention discloses a flexible force-sensitive sensing fiber with high tensile and high sensitivity and a preparation method thereof. The preparation method comprises the following steps: uniformly and synergically dispersing one-dimensional (1D) nanometer wire / nanometer tube and two-dimension (2D) conductive chip layer into a thermoplastic elastomer solution, preparing a uniform dispersing solution in certain concentration and adopting a wet spinning method for preparing an elastic complex fiber with high orienting 1D / 2D hybridized network; placing the complex fiber into a metallic precursor solution and fully swelling; placing into reducing vapor for reducing and reducing the metallic precursor into zero dimension (0D) metal nanoparticle, thereby preparing the flexible force-sensitive sensing fiber based on 0D / 1D / 2D three-dimensional synergic network. The force-sensitive sensing fiber shows higher stretchability and high conductivity, has high responsibility to deformation and has wide application prospect in the fields of flexible wearable device, flexible electronic skin, intelligent robot and health monitoring.

Description

technical field [0001] The invention relates to the field of force-sensitive sensing fibers, in particular to a high-stretch, high-sensitivity, flexible force-sensitive sensing fiber and a preparation method thereof. Background technique [0002] The flexible force-sensitive sensing material is a flexible conductive composite material used to sense the force on the surface of the material. It is composed of a flexible polymer matrix (or flexible matrix, including rubber, plastic film and fiber fabric, etc.) and conductive fillers in a certain way; under the action of external force, the material undergoes elastic deformation, and the The conductive network is reconfigured and shows a corresponding response in electrical properties. By capturing the qualitative and quantitative relationship between electrical properties and external force or deformation, force-sensitive sensing can be realized. Because it can be attached to various irregular surfaces, bendable, stretchable, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/94D01F6/44D01F1/10
CPCD01F1/10D01F6/44D01F6/94D01F1/09D01F6/42D01F6/70D01F11/06D06M11/83D06M2101/20G01L1/205
Inventor 刘岚陈松刘书奇董旭初王萍萍刘海洲
Owner SOUTH CHINA UNIV OF TECH
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