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Method for preparing one-dimensional core-shell structure BaTiO3@Al2O3 by means of one-step synthesis

A technology of core-shell structure and footwork, applied in fiber processing, fiber chemical characteristics, filament/thread forming, etc., can solve the problems of difficult control of core-shell thickness ratio and shell thickness uniformity, etc., to achieve The effect of controllable thickness, low preparation cost and simple preparation process

Inactive Publication Date: 2016-10-12
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But this method is difficult to control the thickness ratio of the core-shell layer, and the uniformity of the thickness of the shell layer is also difficult to control
At present, the core-shell structure BaTiO is prepared by electrospinning in one step. 3 @Al 2 o 3 One-dimensional materials, and can well control the core-shell ratio and shell uniformity There are few related reports

Method used

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  • Method for preparing one-dimensional core-shell structure BaTiO3@Al2O3 by means of one-step synthesis
  • Method for preparing one-dimensional core-shell structure BaTiO3@Al2O3 by means of one-step synthesis
  • Method for preparing one-dimensional core-shell structure BaTiO3@Al2O3 by means of one-step synthesis

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 1. Weigh Ba(COOH) according to the molar ratio Ba:Ti=1:1 2 、C 16 h 36 o 4 Ti. Ba(COOH) 2 Soluble in CH 3 CH 2 In the COOH solution, the mass ratio of the two is 1:3.2, sonicate for 30 minutes, and then magnetically stir for 30 minutes at a temperature of 40-80°C until Ba(COOH) 2 completely dissolved in CH 3 CH 2 In COOH, the obtained solution A was left at room temperature for 0.8 h; the C 16 h 36 o 4 Ti joins acetylacetone (C 5 h 8 o 2 ), wherein the mass ratio of the two is 1:1.7, then magnetically stirred at room temperature for 0.8 h, and the resulting solution B was left to stand at room temperature for 0.8 h; PVP was added to ethanol (CH 3 CH 2 OH), the mass ratio of the two was 1:1.8, and then magnetically stirred at 35°C for 30 min until PVP was completely dissolved in CH 3 CH 2 In OH, the obtained solution C was left to stand at room temperature for 0.8 h; the three groups of solutions A, B, and C were mixed according to the mass ratio of 1:1:2...

Embodiment 2

[0028] 1. Weigh Ba(COOH) according to the molar ratio Ba:Ti=1:1 2 、C 16 h 36 o 4 Ti. Ba(COOH) 2 Soluble in CH 3 CH 2 In the COOH solution, the mass ratio of the two was 1:3, sonicated for 30 min, and then magnetically stirred at 40 °C for 30 min until Ba(COOH) 2 completely dissolved in CH 3 CH 2 COOH, the resulting solution A was left at room temperature for 0.5 h; the C 16 h 36 o 4 Ti joins acetylacetone (C 5 h 8 o 2 ), where the mass ratio of the two is 1:1.5, then magnetically stirred at room temperature for 0.5 h, and the resulting solution B was left to stand at room temperature for 0.5 h; PVP was added to ethanol (CH 3 CH 2 OH), the mass ratio of the two is 1:1.5, and then magnetically stirred at 30 °C for 30 min until the PVP is completely dissolved in CH 3 CH 2 OH, the obtained solution C was left to stand at room temperature for 0.5 h; the three groups of solutions A, B, and C were mixed in a mass ratio of 1:1:2, and magnetically stirred at room tempe...

Embodiment 3

[0032] 1. Weigh Ba(COOH) according to the molar ratio Ba:Ti=1:1 2 、C 16 h 36 o 4 Ti. Ba(COOH) 2 Soluble in CH 3 CH 2 In the COOH solution, the mass ratio of the two was 1:5, sonicated for 30 min, and then magnetically stirred at 60 °C for 30 min until Ba(COOH) 2 completely dissolved in CH 3 CH 2 COOH, the resulting solution A was left at room temperature for 1.5 h; the C 16 h 36 o 4 Ti joins acetylacetone (C 5 h 8 o 2 ), where the mass ratio of the two was 1:2.5, and then magnetically stirred at room temperature for 1.5, and the resulting solution B was left to stand at room temperature for 2 h; PVP was added to ethanol (CH 3 CH 2 OH), the mass ratio of the two was 1:3, and then magnetically stirred at 60 °C for 30 min until the PVP was completely dissolved in CH 3 CH 2 OH, the obtained solution C was left at room temperature for 2 h; the three groups of solutions A, B, and C were mixed according to the mass ratio of 1:1:2, and magnetically stirred at room tem...

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Abstract

The invention relates to a method for preparing one-dimensional core-shell structure BaTiO3@Al2O3 by means of one-step synthesis. The method comprises the steps of respectively adding the spinning liquid of a core layer and the spinning liquid of a shell layer into a needle cylinder arranged at the inner layer and a needle cylinder arranged at the outer layer, using two needles heads with different diameters to sleeve each other to form a coaxial two-layer spinneret, and spinning by adopting an electrostatic spinning method, wherein the spinning liquid of the core layer is prepared from barium acetate, tetrabutyl titanate and polypyrrolidone in proportion, and the spinning liquid of the shell layer is prepared from aluminium isopropoxide and polypyrrolidone in proportion. The product prepared by the method has a core-shell structure, organic matters volatilize after the product is sintered at high temperature, and the one-dimensional core-shell structure BaTiO3@Al2O3 is finally formed, wherein the one-dimensional core-shell structure BaTiO3@Al2O3 has the length of about 10-150mu m and the diameter of about 150-400nm (the core layer is about 75-200nm). Compared with the prior art, the method has the advantages of being low in preparation cost, simple in preparation technology and controllable in thicknesses of the core layer and the shell layer, being capable of realizing mass production, etc.

Description

technical field [0001] The invention relates to the technical field of preparation of functional materials, in particular to a one-step synthesis of one-dimensional core-shell structure BaTiO 3 @Al 2 o 3 method of preparation. Background technique [0002] Barium titanate is a one-step ferroelectric material with excellent piezoelectric performance, pyroelectric performance and large dielectric constant. It is one of the most widely used materials in electronic ceramics and is known as "electronic ceramics industry". Pillar", which is mainly used for the preparation of various electronic components such as electronic ceramics, PTC thermistors, capacitors, and the reinforcement of some composite materials. In recent years, with the rapid development of electronic components, people have higher and higher requirements for the comprehensive performance of materials. Although barium titanate has excellent properties, it still cannot meet the needs of some material fields. F...

Claims

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Application Information

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IPC IPC(8): D01F9/08D01F9/10D01D5/34
CPCD01D5/34D01F9/08D01F9/10
Inventor 翟继卫潘仲彬沈波
Owner TONGJI UNIV
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