Electrospinning skin-core single fiber with axially equivalent piezoelectric property as well as preparation method and application thereof

A piezoelectric performance and electrospinning technology, applied in the field of single fiber and its preparation, can solve the problems of long receiving distance, unstable and disturbed electrospinning jet flow, and limit the application field of nanofibers, and achieve the effect of simple preparation method

Inactive Publication Date: 2016-06-15
DONGHUA UNIV
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Electrospinning is a common in-situ polarization method for preparing piezoelectric polymer nanofibers. It has the advantages of simple equipment, easy operation and stable fibers. Generally, the receiving plate of the negative electrode is a metal that is perpendicular to the jet. plate, a roller with a certain rotating speed, or a liquid receiving pole, and the traditional electrospinning generally sets the receiving distance to be long, so that the spinning liquid has enough time to solidify, so that the electrospinning jet has unstable disturbances, making The final nanofibers exist in the form of disordered or oriented non-woven mats, which greatly limits the application fields of nanofibers

Method used

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  • Electrospinning skin-core single fiber with axially equivalent piezoelectric property as well as preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0026] The spinning solution is 10% polyvinylidene fluoride / DMF solution, the propulsion speed is set to 1ml / h, the output voltage of the voltage generator is set to 15kV, and the copper wire with a diameter of 0.4mm is used as the receiving electrode to carry out the electrospinning experiment, and the obtained The thickness of the cortex was 50 μm.

[0027] A uniform skin-core structure composite single fiber is obtained, the thickness of the fiber skin is about 0.1mm, and the bonding between the nanofibers is relatively tight. From the electron microscope photos ( figure 1 ), it can be seen that the polymer nanofibers are tightly packed, the thickness of the polymer nanofibers is relatively uniform, the orientation along the axial direction of the metal wire is high, and there is basically no twist. It has the same piezoelectric performance at all angles in the axial direction, and the peak value of instantaneous piezoelectric output per unit length of fiber is 5V / m·N.

Embodiment 2

[0029] The spinning liquid is 12% polyvinylidene fluoride / DMF solution, the propulsion speed is set to 0.8ml / h, the output voltage of the voltage generator is set to 18kV, and the copper wire with a diameter of 1mm is used as the receiving electrode for electrospinning experiments. A skin thickness of 65 μm and a polymer fiber diameter of 1 μm was obtained.

[0030] Obtain a uniform skin-core structure composite single fiber, the thickness of the fiber skin is 0.2mm, the bonding between the nanofibers is very tight, the polymer nanofibers are tightly packed, the thickness of the polymer nanofibers is relatively uniform, and the orientation is aligned along the wire axis high degree. It has the same piezoelectric performance at all angles in the axial direction, and the peak value of instantaneous piezoelectric output per unit length of fiber is 12V / m·N.

Embodiment 3

[0032] The spinning solution is 8% polyvinylidene fluoride / DMF solution, the propulsion speed is set to 1.5ml / h, the output voltage of the voltage generator is set to 15kV, and the electrospinning experiment is carried out with a carbon fiber with a diameter of 0.1mm as the receiving electrode. The thickness of the obtained skin layer was 40 μm, and the diameter of the polymer fiber was 800 nm.

[0033] A uniform skin-core structure composite single fiber is obtained, the thickness of the fiber skin is 0.4mm, the bonding between the nanofibers is very tight, the polymer nanofibers are tightly packed, the thickness of the polymer nanofibers is relatively uniform, and the orientation is aligned along the wire axis high degree. It has the same piezoelectric performance at all angles in the axial direction, and the peak value of instantaneous piezoelectric output per unit length of fiber is 15V / m·N.

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Abstract

The invention relates to an electrospinning skin-core single fiber with an axially equivalent piezoelectric property as well as a preparation method and an application thereof. A conductive fiber is used as a core layer of the single fiber, and a piezoelectric polymer nanofiber is used as a skin layer. The preparation method comprises the following steps: a spinning solution is used as a piezoelectric polymer solution, the conductive fiber is used as a collecting electrode for electrospinning, and the electrospinning skin-core single fiber with the axially equivalent piezoelectric property is obtained; wherein, a cathode receiving end of electrospinning is a conductive fiber which is connected to a cathode, and at the same time a coaxial tunnel type auxiliary receiving device is erected at epitaxy of the conductive fiber. The preparation method is simple. The single fiber has the axially equivalent piezoelectric property, and has good application prospects in the aspects of filtering, catalysis, energy conversion, medicament loading and sensors, etc.

Description

technical field [0001] The invention belongs to the field of monofilament and its preparation method, and in particular relates to an electrospinning sheath-core monofilament with axially equivalent piezoelectric performance and its preparation method and application. Background technique [0002] At present, the common piezoelectric materials are mainly divided into three categories: piezoelectric ceramics, piezoelectric semiconductors and piezoelectric polymers. Among them, piezoelectric polymers make up for some deficiencies of the former two piezoelectric materials, and it has good biocompatibility. It is a new type of piezoelectric material because it is easy to process and light in weight. In terms of processing piezoelectric polymers, a common method at present is to spin piezoelectric polymers into non-woven felts composed of nanofibers of a certain diameter by electrospinning. Polarization, so the post-polarization process is eliminated, and then the non-woven fabr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F8/18D01F8/08D01F8/10D01D5/34
CPCD01D5/34D01F8/08D01F8/10D01F8/18
Inventor 俞昊俞彬杨通辉
Owner DONGHUA UNIV
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