High-tensile piezoelectric microfiber with two-stage wave structure and manufacturing method thereof

A wavy structure, microfiber technology, applied in fiber processing, yarn, filament/wire forming, etc., can solve the problem of increasing the inhomogeneity of the mechanical properties of the sensor, not solving the pre-stretching strain and large deformation ability of piezoelectric microfibers, unfavorable Practical application and other issues, to achieve the effects of large-scale preparation, improvement of structural designability, tensile properties, and high deformation capacity

Active Publication Date: 2018-12-11
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the whipping mode of the electrospinning jet is limited by the relative moving speed of the jet and the collecting plate. Generally, the wavy fiber can only be realized in a specific speed range, which limits the improvement of the amplitude-wavelength ratio of the in-plane wavy fiber. Therefore, It is necessary to rely on a large pre-stretch strain to prepare high-stretch PVDF piezoelectric fibers, which is not conducive to practical applications and tends to increas

Method used

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  • High-tensile piezoelectric microfiber with two-stage wave structure and manufacturing method thereof
  • High-tensile piezoelectric microfiber with two-stage wave structure and manufacturing method thereof
  • High-tensile piezoelectric microfiber with two-stage wave structure and manufacturing method thereof

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Experimental program
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Effect test

Embodiment 1

[0036] A kind of PVDF high tensile piezoelectric microfiber with two-stage wave structure, its preparation method comprises the steps:

[0037] 1) Prepare PVDF electrospinning solution.

[0038] 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, and quickly cover the bottle to prevent the acetone from volatilizing. Place the sample bottle on a magnetic stirrer to stir, set the heating temperature to 35°C, and stir for 4-6h until a uniform and transparent PVDF electrospinning solution is obtained. The spinning solution was left to stand for half an hour to remove air bubbles and set aside.

[0039] 2) Preparation of in-plane wavy PVDF piezoelectric microfibers.

[0040] Use a 1mL 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, connect the negative pole of the high-voltage power supply to the metal collection pla...

Embodiment 2

[0048] A kind of PVDF high tensile piezoelectric microfiber with two-stage wave structure, its preparation method comprises the steps:

[0049] 1) Prepare PVDF electrospinning solution.

[0050] Weigh 1g of PVDF powder, put it into a 25mL sample bottle with a stirring magnet, then add 2g of DMF and 2g of acetone, and quickly cover the bottle to prevent the acetone from volatilizing. Place the sample bottle on a magnetic stirrer to stir, set the heating temperature to 35°C, and stir for 4-6h until a uniform and transparent PVDF electrospinning solution is obtained. The spinning solution was left to stand for half an hour to remove air bubbles and set aside.

[0051] 2) Preparation of in-plane wavy PVDF piezoelectric microfibers with different amplitude-wavelength ratios.

[0052] Use a 1mL 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, connect the negative pole of the high-voltage D...

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Abstract

The invention relates to a high-tensile piezoelectric microfiber with two-stage wave structure and a manufacturing method thereof. The manufacturing method comprises: firstly, through an electrostaticspinning method, manufacturing on a two-dimensional programmable displacement table to obtain a piezoelectric polymer microfiber in an in-plane wave structure, then, transferring the piezoelectric polymer microfiber to a sticky and pre-stretched elastic matrix, gradually releasing pre-stretched stress to make the elastic matrix recover to original length, and finally obtaining the piezoelectric microfiber with two-stage wave polymer. A test result shows that the two-stage wave piezoelectric microfiber has deformation capability far exceeding the pre-stretched stress, and good and stable piezoelectric performance, and amplitude-wavelength ratio of the microfiber can be flexibly adjusted at will. The piezoelectric microfiber and the method have important application prospect in the field ofwearable piezoelectric transducers.

Description

technical field [0001] The invention relates to the technical field of fiber materials and flexible sensing materials, in particular to a high-stretch piezoelectric microfiber with a two-stage wave structure and a preparation method thereof. Background technique [0002] Piezoelectric strain sensors are self-powered electronic devices that can convert dynamic deformation into electrical signals to achieve sensing functions. Piezoelectric strain sensors with tensile deformation capabilities can be used as wearable piezoelectric devices for monitoring the human body / robot. Joint movement, human respiration, and external deformation stimulation have become research hotspots in the field of human-computer interaction in recent years. [0003] Piezoelectric material is a key component of piezoelectric devices, and its mechanical properties play a decisive role in the deformation ability of piezoelectric sensors. However, the intrinsic elongation at break of typical inorganic pie...

Claims

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Application Information

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IPC IPC(8): D02G3/32D02G3/04D01D5/00
CPCD01D5/0023D01D5/0092D02G3/045D02G3/32D10B2321/042
Inventor 陈志宏徐萌袁月官建国戴亚文徐泓梁梓恒
Owner WUHAN UNIV OF TECH
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