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A kind of polyvinylidene fluoride piezoelectric non-woven fabric and its preparation method and application

A polyvinylidene fluoride piezoelectric and polyvinylidene fluoride technology, which is used in the preparation of spinning solutions, textiles and papermaking, non-woven fabrics, etc. The piezoelectric performance of the material is not high, and the polyvinylidene fluoride electrospinning solution is not easy to store, etc., to achieve the effect of enriching the preparation method, prolonging the storage time, and improving the piezoelectric performance

Inactive Publication Date: 2015-10-28
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method solves the problems that the polyvinylidene fluoride electrospinning solution is not easy to preserve, the reproducibility of polyvinylidene fluoride electrospinning is poor, and the piezoelectric performance of polyvinylidene fluoride material is not high.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] First add 10wt% LiCl to the N,N-dimethylformamide solution, then add polyvinylidene fluoride powder evenly, control the concentration at 15%, and add a magnetic rotor at the same time, in an oil bath with magnetic stirring Stir at a speed of 90r / min and 50°C for 60min, the powder is completely dissolved to obtain a clear viscous solution, which is the electrospinning solution of polyvinylidene fluoride, and a yellow gel-like solid is obtained after standing for 5 days. The obtained solid was put on a clean Erlenmeyer flask, and then the Erlenmeyer flask was put into a hot air drying oven with a temperature set at 150° C. for heat treatment for 12 hours. Take out the Erlenmeyer flask, put it into a desiccator to cool at room temperature for 30 minutes, then pour the melted polyvinylidene fluoride electrospinning solution into a clean Erlenmeyer flask, and store it for later use.

[0027] Adjust the process parameters of the electrospinning machine as spinning voltage 10k...

Embodiment 2

[0029] Add 8% LiCl to the N,N-dimethylacetamide solution, then slowly and evenly add polyvinylidene fluoride powder with a concentration of 10%, in an oil bath with magnetic stirring at a speed of 120r / min and Stir at 45°C for 90 minutes until the powder is completely dissolved, and a clear viscous solution is obtained, which is the electrospinning solution of polyvinylidene fluoride. After standing for 3 days, a white gel-like solid is obtained. The obtained solid was put into a clean Erlenmeyer flask, and then the Erlenmeyer flask was put into an oil bath set at 125° C. for heat treatment for 15 hours. Take out the Erlenmeyer flask, put it into a desiccator to cool at room temperature for 30 minutes, then pour the melted polyvinylidene fluoride electrospinning solution into a clean Erlenmeyer flask, and store it for future use.

[0030] Adjust the process parameters of the electrospinning machine as spinning voltage 12kV, receiving distance 12cm, feed rate 1.5mL / h, roller co...

Embodiment 3

[0032] First add 9% LiCl to the N-methylpyrrolidone solution, then slowly and evenly add polyvinylidene fluoride powder, the concentration is controlled at 20%, while controlling the temperature at 40°C and the speed of 105r / min under temperature-controlled magnetic stirring Stir the mixture in a container for 120 minutes, the powder is completely dissolved, and a clear viscous solution is obtained, which is the electrospinning solution of polyvinylidene fluoride, and the solution is left to stand for 7 days to obtain a colorless gel-like solid. The obtained solid was put into a clean Erlenmeyer flask, and then the Erlenmeyer flask was put into a hot air drying oven with a temperature set at 105° C. for heat treatment for 18 hours. Take out the Erlenmeyer flask, put it into a desiccator to cool at room temperature for 30 minutes, then pour the melted polyvinylidene fluoride electrospinning solution into a clean Erlenmeyer flask, and store it for future use.

[0033] Adjust the...

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Abstract

The invention discloses a polyvinylidene fluoride piezoelectric non-woven fabric, and a preparing method and application thereof. The method includes 1, dissolving polyvinylidene fluoride in common electrospinning solvent, and obtaining polyvinylidene fluoride solvent; 2, allowing the polyvinylidene fluoride solvent to stand to form gel solid, performing special heating processing on the gel solid, and cooling to obtain polyvinylidene fluoride electrospinning solvent; 3, optimizing process parameters of electrospinning, utilizing the polyvinylidene fluoride electrospinning solvent prepared in step 2 to electrospin through an electrospinning machine, soaking the obtained product into deionized water, and then taking out and drying to obtain nano piezoelectric non-woven fabric with fine piezoelectric property. The preparing method is simple in operation, maintaining time of the polyvinylidene fluoride electrospinning solvent is prolonged, operability of the polyvinylidene fluoride electrospinning is improved, development of researching polyvinylidene fluoride electrospinning can be promoted, and the new method is provided for preparing the piezoelectric non-woven fabric.

Description

technical field [0001] The invention belongs to the technical field of non-woven fabric preparation, and in particular relates to a polyvinylidene fluoride electrostatic spinning piezoelectric non-woven fabric and a preparation method thereof. technical background [0002] For a long time, electrospinning has been widely concerned as a preparation method of nano-scale fibers, and polyvinylidene fluoride, as a polymer material with piezoelectricity and pyroelectricity, is mainly used in national defense, security, photography and energy, etc. field. In recent years, the preparation of nano-scale to micro-scale non-woven fabrics with piezoelectric properties by electrospinning technology using polyvinylidene fluoride as raw material has become a research hotspot. [0003] However, people's research on polyvinylidene fluoride electrospinning is mainly focused on the application of the obtained electrospun nonwoven fabrics. The focus is on whether the obtained product belongs t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D04H1/4318D04H1/728D01D1/02
Inventor 杨仁党王瑞彬阮蒙杨飞刘德桃
Owner SOUTH CHINA UNIV OF TECH
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