A kind of preparation method of flexible barium titanate ceramic nanofiber membrane

A nanofiber membrane, barium titanate technology, applied in the direction of inorganic raw material artificial filament, textile and papermaking, fabric surface trimming, etc., to achieve the effects of high low-frequency vibration sensitivity, low cost, and controllable process

Active Publication Date: 2021-07-27
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are few reports on the preparation of flexible barium titanate ceramic nanofibers

Method used

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  • A kind of preparation method of flexible barium titanate ceramic nanofiber membrane
  • A kind of preparation method of flexible barium titanate ceramic nanofiber membrane
  • A kind of preparation method of flexible barium titanate ceramic nanofiber membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Method for preparing flexible titanate ceramic nanofibers, specific steps:

[0033] (1) Formulated with a sol gel method: 0.3 g of polyvinylpyrrolidone (Aladdin, M) with a sol gel method: 0.3 g of polyvinylpyrrolidone (Aladdin, M) at 30 ° C w = 1,300,000) was stirred in 6 g of solvent (water, glacial acetic acid and mixture of glacial acetic acid and ethanol), and then 0.9 g of acetate and tetrabutyl acetate and titanate, stirred for 120min, mix well mix The phytosyl titanium titanium titanate, wherein the molar ratio of the tire and titanium elements in the solution is 1: 1;

[0034] (2) The above titanate precursor sol is electrostatically spun, under an electric field, the charged droplets overcome the surface tension to form a jet and elongated in the air, and finally deposited on the receiving substrate, obtain a precursor nanofiber film. When electrostatic spinning, a constant temperature hot field of 25 ° C is applied to the spinning section and control the temperatu...

Embodiment 2

[0038] The present invention provides a method of preparing a flexible BTO ceramic nanofiber, and the preparation method is similar to that of Example 1, in which the polymer selects polyvinyl alcohol (Aladdin, M) in step (1). w = 600,000), and give a quantitative acetylacetone as a chelating agent, the specific steps are:

[0039] (1) Formulate the titanate precursor sol with sol gel method: 0.25 g of polyvinyl alcohol (Aladdin, M) at 30 ° C w= 600,000) The mixture was stirred in a 5.5 g of a solvent (mass ratio of 3: 2: 4: 2), and mixture of glacial acetic acid, ethanol and acetylacetone) was stirred, and then 0.9 g of acetate and tetrabutyl acetate and titanate. Stirring 120min, mix wellly mixed with barium titanate precursor sol, wherein the molar ratio of barium and titanium elements in the solution is 1: 1;

[0040] (2) The above titanate precursor sol is electrostatically spun, under an electric field, the charged droplets overcome the surface tension to form a jet and elon...

Embodiment 3

[0044] The present invention provides a method of preparing a flexible BTO ceramic nanofiber, and the preparation method is similar to that of Example 1, in which in step (1), the constructed sol - gel system is glacial acetic acid-n-but Alcohol, specific steps are:

[0045] (1) Formulated with a sol gel method: 0.3 g of polyvinylpyrrolidone (Aladdin, M) with a sol gel method: 0.3 g of polyvinylpyrrolidone (Aladdin, M) at 30 ° C w = 1,300,000) was stirred in a 5.4 g of a solvent (a mixture of glacial acetic acid and n-butanol with mass ratio of 4: 5), and then 0.9 g of acetate and tetrabutyl acetate and titanate, stirred for 120min, mix well mixed with titanium. Barium-borne precursor sol, wherein the molar ratio of barium and titanium elements in the solution is 1: 1;

[0046] (2) The above titanate precursor sol is electrostatically spun, under an electric field, the charged droplets overcome the surface tension to form a jet and elongated in the air, and finally deposited on th...

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Abstract

The invention provides a method for preparing a flexible barium titanate ceramic nanofiber membrane, which is characterized in that it includes: step 1: using a sol-gel method to prepare a barium titanate precursor sol, and the precursor solution contains a solvent, a polymer Polymer, barium source and titanium source; Step 2: Electrospinning the barium titanate precursor sol to obtain a precursor nanofiber membrane, applying constant temperature heat of 20 to 55°C in the spinning interval during electrospinning Field and control the temperature of the receiving device to 20-40°C, and the rotating speed of the receiving device to 20-100n / min; Step 3: Calculate the obtained precursor nanofiber membrane in an air atmosphere using a step-wise temperature rise method to obtain flexible titanium Barium acid ceramic nanofiber membrane. The flexible BTO ceramic nanofiber membrane prepared by the invention has the advantages of high softness, small size, easy processing, and high sensitivity to external low-frequency vibration, and can be directly used as a sensitive material.

Description

Technical field [0001] The invention relates to a flexible barium titanate ceramic nanofiber membrane and a preparation method thereof, and belongs to the field of new energy materials and technology. Background technique [0002] Flexible smart wearable products refer to flexible wearable mobile smart terminals that comprehensively use sensing, communication, control, driving, display, embedding and other technologies to realize functions such as user interaction, life entertainment, human body monitoring, and individual soldier applications. This type of products has the characteristics of flexibility, large deformation, real-time, and adaptability to long-term wear. It has broad application prospects in many fields such as medical care, health, sports, entertainment, industry, and military. Among them, flexible piezoelectric sensors are a smart wearable product that has developed rapidly in recent years. Among many piezoelectric materials, perovskite-structured barium ti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D04H1/728D06C7/00D01F9/08C08G73/02
CPCC08G73/0213D01F9/08D04H1/728D06C7/00
Inventor 闫建华韩雨卉夏书会俞建勇丁彬
Owner DONGHUA UNIV
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