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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: 2021-06-04
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] This 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 subjected to magnetic stirring at room temperature for 5 h to obtain a polymer solution. 1.5 g of barium acetate was dissolved in 10 g of glacial acetic acid, and ultrasonically oscillated for 10 minutes to obtain a barium acetate solution. The obtained polymer solution was added to the barium acetate solution, and magnetically stirred at room temperature for 4 hours to obtain a mixed solution, and 2 g of tetrabutyl titanate was added to the mixed solution to obtain a spinning solution.

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

[0048] The obtained barium titanate spinning solution is 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] 1.5 g of PVP with a molecular weight of 13W was dissolved in 20 g of ethanol, and subjected to magnetic stirring at room temperature for 5 h to obtain a polymer solution. 1.18 g of strontium acetate was dissolved in 15 g of glacial acetic acid, and ultrasonically oscillated 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 after magnetic stirring at room temperature for 4 hours, 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 is put into an air spinning device for air sp...

Embodiment 3

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

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

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

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Abstract

The invention discloses a preparation method of a titanate fiber membrane. The preparation method comprises the following steps of dissolving a polymer in a first solvent to prepare a polymer solution; dissolving metal salt in a second solvent, and preparing a metal salt solution, wherein the second solvent comprises acetic acid, and the mass fraction of the acetic acid in the second solvent is 50% or above; mixing the polymer solution and the metal salt solution to form a mixed solution, and adding titanium salt into the mixed solution to obtain a spinning solution; and spinning the spinning solution to obtain a precursor fiber membrane, sintering the precursor fiber membrane in an oxygen-containing atmosphere, heating to 700-900 DEG C, cooling to 300-700 DEG C, and keeping the temperature. The metal salt and the polymer are dissolved separately and then mixed, the influence of the electrostatic interaction of salt ions on the dissolving process of the polymer is avoided, the titanium salt can be effectively prevented from being hydrolyzed by finally adding the titanium salt, large-scale preparation can be realized by utilizing the preparation method, and the market demand of a flexible device 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 a 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 as The core materials are used to prepare various sensor devices. In recent years, the rapid development of wearable devices has put forward new requirements for the flexibility of titanate ceramics. However, due to their own 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 a high aspect ratio have a nanoscale cross-sec...

Claims

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Application Information

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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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