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A kind of high tensile piezoelectric microfiber with three-dimensional helical structure and its preparation method

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

Active Publication Date: 2021-10-08
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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  • A kind of high tensile piezoelectric microfiber with three-dimensional helical structure and its preparation method
  • A kind of high tensile piezoelectric microfiber with three-dimensional helical structure and its preparation method
  • A kind of high tensile piezoelectric microfiber with three-dimensional helical structure and its preparation method

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Experimental program
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Effect test

Embodiment 1

[0031] A PVDF high tensile electromal fiber having a three-dimensional helical structure, wherein the preparation method comprises the steps of:

[0032] 1) Formulate a PVDF electrostatic spinning solution. 1 g of PVDF powder was weighed, and 25 mL was placed in a sample bottle with stirring magnets, and 2.5 g of DMF and 2.5 g of acetone were added, and the sample bottle cap was added to the sample bottle cap to volatilize. The sample bottle was placed on a magnetic stirrer and stirred until a uniform and transparent PVDF electrospinning solution was obtained. The solution was then allowed to remove bubbles, and prepared as a spinning solution.

[0033] 2) Prepare three-dimensional spiral PVDF piezoelectric fibers that continuously uniformly stacked. The retained PVDF solution was taken with a syringe and attached to the syringe needle to the syringe needle, and the high voltage power supply negative electrode was connected to a fixed metal receiving end. The distance between the ...

Embodiment 2

[0040] A PVDF high tensile electromal fiber having a three-dimensional helical structure, wherein the preparation method comprises the steps of:

[0041] 1) Formulate a PVDF electrostatic spinning solution. 1 g of PVDF powder was weighed, placed in a sample bottle placed in a stirred magnet, and then added 2.5 g of DMF and 2.5 g of acetone, quickly cover the vial cap to volatilize the acetone. The sample bottle was placed on a magnetic stirrer and stirred until a uniform and transparent PVDF electrospinning solution was obtained. The solution was then allowed to remove bubbles, and prepared as a spinning solution.

[0042] 2) Preparation of three-dimensional spiral PVDF piezoelectric microfibers having a continuous uniformly stacked outer diameter of different spirals. The retained PVDF solution was taken with a syringe and attached to the syringe needle to the syringe needle, and the high voltage power supply negative electrode was connected to a fixed metal receiving end. The dist...

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Abstract

The invention provides a high-stretch piezoelectric microfiber with a three-dimensional helical structure and a preparation method thereof. The three-dimensional helical piezoelectric microfiber obtains a three-dimensional helical structure by electrospinning, using a jet mechanical bending method, and then directly stretching the other free end by fixing one end. The three-dimensional helical piezoelectric microfiber involved in the present invention can exhibit a tensile strain capacity of more than 500% under the condition of small local strain, and has important application prospects in the field of wearable piezoelectric sensors.

Description

Technical field [0001] The present invention belongs to the technical field of flexible sensing material, and more particularly to polyvinylidene fluoride (PVDF) piezoelectric microfibers having a three-dimensional helical structure and a preparation method thereof. Background technique [0002] The flexible piezoelectric strain sensor converts the dynamic variation into the electrical signal that can be monitored in real time by signaling, which can be used to detect various physiological activities including large hands, elbows and legs, and smaller breathing, pulse and swallowing, etc. . In addition, flexible piezoelectric strain sensors have great application potential in the field of flexible touch screen, flexible electronic skin, and even artificial robots. The intrinsic elongation length of the material is limited to the material, and the flexible piezoelectric strain sensor that is simply derived from the piezoelectric material is far from which the measurement requireme...

Claims

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Application Information

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Patent Type & Authority Patents(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