Preparation method of titanate fiber membrane

A fiber membrane, titanate technology, used in spinning solution preparation, fiber chemical characterization, textiles and papermaking, etc.

Active Publication Date: 2022-06-21
SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For this reason, the present invention proposes a preparation method of titanate fiber membrane, which can effectively solve the hydrolysis problem of titanium salt in the preparation process by adjusting the preparation process, and improve the performance of the material

Method used

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  • Preparation method of titanate fiber membrane
  • Preparation method of titanate fiber membrane
  • Preparation method of titanate fiber membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] The present embodiment provides a barium titanate ceramic nanofiber membrane, which is prepared according to the following steps:

[0045] (1) Preparation of barium titanate spinning solution

[0046] 1 g of PVP with a molecular weight of 13W was dissolved in 15 g of ethanol, and a polymer solution was obtained by magnetic stirring at room temperature for 5 h. Dissolve 1.5 g of barium acetate in 10 g of glacial acetic acid, and ultrasonically vibrate for 10 minutes to obtain a barium acetate solution. The obtained polymer solution was added to the barium acetate solution, and the mixed solution was obtained by magnetic stirring at room temperature for 4 hours, and 2 g of tetrabutyl titanate was added to the mixed solution to obtain the spinning solution.

[0047] (2) Preparation of barium titanate precursor fiber membrane by air spinning

[0048] The obtained barium titanate spinning solution was put into an air spinning device for air spinning to obtain a barium tita...

Embodiment 2

[0054] This embodiment provides a strontium titanate ceramic nanofiber membrane, which is prepared according to the following steps:

[0055] (1) Preparation of strontium titanate spinning solution

[0056] 1.5g of PVP with a molecular weight of 13W was dissolved in 20g of ethanol, and the polymer solution was obtained by magnetic stirring at room temperature for 5h. Dissolve 1.18 g of strontium acetate in 15 g of glacial acetic acid, and ultrasonically vibrate for 10 minutes to obtain a strontium acetate solution. The obtained polymer solution was added to the strontium acetate solution, and a mixed solution was obtained by magnetic stirring at room temperature for 4 h, and 2 g of tetrabutyl titanate was added to the mixed solution to obtain a spinning solution.

[0057] (2) Preparation of strontium titanate precursor fiber membrane by air spinning

[0058] The obtained strontium titanate spinning solution was put into an air spinning device for air spinning to obtain a str...

Embodiment 3

[0064] The present embodiment provides a strontium barium titanate ceramic nanofiber membrane, which is prepared according to the following steps:

[0065] (1) Preparation of barium strontium titanate spinning solution

[0066] 1.5g of PVP with a molecular weight of 13W was dissolved in 15g of ethanol, and the polymer solution was obtained by magnetic stirring at room temperature for 5h. Dissolve 0.35g of strontium acetate and 1.05g of barium acetate in 10g of glacial acetic acid, ultrasonically shake for 10 minutes to obtain a mixed solution of strontium acetate and barium acetate, then add the obtained polymer solution to it, and obtain a mixed solution through magnetic stirring at room temperature for 5h , take 2g of tetrabutyl titanate and add it to the mixed solution to obtain spinning solution.

[0067] (2) Preparation of strontium barium titanate precursor fiber membrane by air spinning

[0068] The obtained barium strontium titanate spinning solution is put into an a...

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Abstract

The invention discloses a preparation method of a titanate fiber membrane, which comprises the following steps: dissolving a polymer in a first solvent to obtain a polymer solution; dissolving a metal salt in a second solvent to obtain a metal salt solution , the second solvent includes acetic acid, and the mass fraction of acetic acid in the second solvent is more than 50%; the polymer solution and the metal salt solution are mixed to form a mixed solution, and titanium salt is added to the mixed solution to obtain a spinning solution; the spinning solution Spinning is carried out to obtain a precursor fiber film, which is then placed in an oxygen-containing atmosphere for sintering. First, the temperature is raised to 700-900° C., and then the temperature is lowered to 300-700° C. to keep the temperature. The present invention adopts the method of dissolving and mixing the metal salt and the polymer separately, avoiding the influence of the electrostatic effect of the salt ion on the dissolving process of the polymer, adding the titanium salt at the end can effectively prevent the hydrolysis of the titanium salt, and utilizing the preparation method of the present invention Large-scale preparation can be realized, and the market demand for flexible devices is met.

Description

technical field [0001] The invention relates to the technical field of preparation of fiber materials, in particular to a preparation method of a titanate fiber membrane. Background technique [0002] Titanate ceramics with perovskite structure exhibit unique ferroelectricity, pyroelectricity or piezoelectricity due to their special crystal structure. They are a class of functional ceramics with excellent performance and are often used in the field of electronic devices. The core material prepares a wide variety of sensing devices. In recent years, the rapid development of wearable devices has put forward new requirements for the flexibility of titanate ceramics. However, due to the special bonding state of covalent bonds and ionic bonds, it is usually difficult for ceramics to have the required flexibility in the field of flexible devices. Therefore, it is very important to develop titanate ceramics with certain flexibility. [0003] Nanofibers with high aspect ratio have...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D04H1/732D01D1/02D04H1/4209D01F9/10
CPCD04H1/732D01D1/02D04H1/4209D01F9/10
Inventor 李勃张晗王浩贾璐娜李盼于璐
Owner SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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