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High-tensile piezoelectric microfiber with three-dimensional spiral structure and preparation method of high-tensile piezoelectric microfiber

A helical structure, microfiber technology, used in fiber processing, electrospinning, textiles and papermaking, etc., to achieve excellent axial displacement

Active Publication Date: 2019-09-10
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using liquids such as water as the receiving end is an effective way to preserve the three-dimensional structure of fibers. However, PVDF materials are more flexible than other spinning materials, so it is still difficult to preserve and transfer the three-dimensional helical structure of PVDF by using liquids as the receiving end.

Method used

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  • High-tensile piezoelectric microfiber with three-dimensional spiral structure and preparation method of high-tensile piezoelectric microfiber
  • High-tensile piezoelectric microfiber with three-dimensional spiral structure and preparation method of high-tensile piezoelectric microfiber
  • High-tensile piezoelectric microfiber with three-dimensional spiral structure and preparation method of high-tensile piezoelectric microfiber

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Effect test

Embodiment 1

[0031] A kind of PVDF high tensile piezoelectric microfiber with three-dimensional helical structure, its preparation method comprises the steps:

[0032] 1) Prepare PVDF electrospinning solution. Weigh 1g of PVDF powder, put it into a 25mL sample bottle with a stirring magnet, then add 2.5g of DMF and 2.5g of acetone in sequence, and quickly cover the sample bottle to prevent the acetone from volatilizing. The sample bottle was placed on a magnetic stirrer and heated and stirred until a uniform and transparent PVDF electrospinning solution was obtained. The solution is then allowed to stand to remove air bubbles and is ready to be used as a spinning solution.

[0033] 2) Preparation of continuous and uniform stacked three-dimensional helical PVDF piezoelectric microfibers. Use a syringe to draw the PVDF solution after standing, connect the positive pole of the high-voltage DC power supply to the needle of the syringe, and connect the negative pole of the high-voltage power ...

Embodiment 2

[0040] A kind of PVDF high tensile piezoelectric microfiber with three-dimensional helical structure, its preparation method comprises the steps:

[0041] 1) Prepare PVDF electrospinning solution. Weigh 1g of PVDF powder, put it into a sample bottle with a stirring magnet, then add 2.5g of DMF and 2.5g of acetone in sequence, and quickly cover the sample bottle to prevent the acetone from volatilizing. The sample bottle was placed on a magnetic stirrer and heated and stirred until a uniform and transparent PVDF electrospinning solution was obtained. The solution is then allowed to stand to remove air bubbles and is ready to be used as a spinning solution.

[0042] 2) Preparation of continuous and uniformly stacked three-dimensional helical PVDF piezoelectric microfibers with different helical outer diameters. Use a syringe to draw the PVDF solution after standing, connect the positive pole of the high-voltage DC power supply to the needle of the syringe, and connect the negati...

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Abstract

The invention provides a high-tensile piezoelectric microfiber with a three-dimensional spiral structure and a preparation method of the high-tensile piezoelectric microfiber. The three-dimensional spiral piezoelectric microfiber is electrospun, a jet-flow mechanical bending method is applied, and one end is fastened while the other free end is directly pulled to obtain the three-dimensional spiral structure. The three-dimensional spiral piezoelectric microfiber can exhibit the tensile strain capability of more than 500% under small local strain, thereby having an important application prospect in the field of wearable piezoelectric sensors.

Description

technical field [0001] The invention belongs to the technical field of flexible sensing materials, and in particular relates to a polyvinylidene fluoride (PVDF) piezoelectric microfiber with a three-dimensional helical structure and a preparation method thereof. Background technique [0002] Flexible piezoelectric strain sensors convert dynamic deformation into electrical signals that can be monitored in real time by means of signal conduction, which can be used to detect various physiological activities including large-scale bending of hands, elbows and legs, and small-scale breathing, pulse and swallowing, etc. . In addition, flexible piezoelectric strain sensors have great application potential in fields such as flexible touch screens, flexible electronic skins, and even artificial intelligence robots. Limited by the intrinsic elongation at break of the material, flexible piezoelectric strain sensors that rely solely on the intrinsic elongation at break of piezoelectric ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D5/22D01D5/00
CPCD01D5/003D01D5/0092D01D5/22
Inventor 戴亚文袁月陈俊宇陈志宏陈创刘益民孙培泽
Owner WUHAN UNIV OF TECH