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Ferromagnet composite polymer nanofilm and preparation method thereof

A composite polymer and nano-film technology, applied in the preparation of the nano-film and the field of ferromagnetic composite polymer nano-film, can solve the problems of large leakage current, reduced magnetoelectric performance, weak magnetoelectric effect, etc., and achieve inevitable improvement. The effect of increasing the magnetoelectric effect and improving the agglomeration phenomenon

Active Publication Date: 2019-10-25
贵州贤俊龙彩印有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The preparation of magnetoelectric composite films by particle compounding can solve the above problems, but particle compounding also brings a series of problems, such as the inevitable agglomeration of ferromagnetic phase fillers will lead to a decrease in specific surface area, making the magnetoelectric effect weaker; low resistivity The infiltration of the ferromagnetic phase filler will lead to a large leakage current, making it difficult to polarize the film, and eventually lead to a decrease in the magnetoelectric properties; the interface compatibility between the inorganic ceramic filler and the polymer matrix is ​​not good, etc.

Method used

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  • Ferromagnet composite polymer nanofilm and preparation method thereof
  • Ferromagnet composite polymer nanofilm and preparation method thereof
  • Ferromagnet composite polymer nanofilm and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0045] A preparation method of a ferromagnetic composite polymer nano film, specifically implemented according to the following steps:

[0046] 0.05gCoFe 2 o 4 Nanoparticles were added to 18ml of deionized water, and ultrasonically dispersed to form a suspension; then the suspension was stirred in a water bath and heated to 78°C, and oleic acid with a mass percentage of 25% of the suspension was added dropwise to the suspension, Stir while adding dropwise, raise the temperature to 90°C, keep it warm for 1h, and after naturally cooling down to room temperature, take out the precipitate, wash it twice with absolute ethanol and deionized water, put it in an oven and dry it under vacuum at 65°C for 24h to obtain modified CoFe 2 o 4 Nanoparticles, namely modified CFO nanoparticles.

[0047] According to the molar ratio Ba:Ti=1:1, titanium isopropoxide and citric acid were continuously stirred in 50ml ethanol, and heated at 90°C for 20min to obtain a titanium citrate solution; 0....

Embodiment 2

[0052] A preparation method of a ferromagnetic composite polymer nano film, specifically implemented according to the following steps:

[0053] 0.052gCoFe 2 o 4 Nanoparticles were added to 20ml of deionized water, and ultrasonically dispersed to form a suspension; then the suspension was stirred in a water bath and heated to 79°C, and oleic acid with a mass percentage of 25% of the suspension was added dropwise to the suspension, Stir while adding dropwise, raise the temperature to 90°C, keep it warm for 1h, and after naturally cooling down to room temperature, take out the precipitate, wash it twice with absolute ethanol and deionized water, put it in an oven and dry it under vacuum at 65°C for 24h to obtain modified CoFe 2 o 4 Nanoparticles, namely modified CFO nanoparticles.

[0054] According to the molar ratio Ba:Ti=1:1, titanium isopropoxide and citric acid were continuously stirred in 50ml ethanol, and heated at 90°C for 20min to obtain a titanium citrate solution; 0...

Embodiment 3

[0059] A preparation method of a ferromagnetic composite polymer nano film, specifically implemented according to the following steps:

[0060] 0.056gCoFe 2 o 4 Nanoparticles were added to 20ml of deionized water, and ultrasonically dispersed to form a suspension; then the suspension was stirred in a water bath and heated to 80°C, and oleic acid with a mass percentage of 25% of the suspension was added dropwise to the suspension, Stir while adding dropwise, raise the temperature to 90°C, keep it warm for 1h, and after naturally cooling down to room temperature, take out the precipitate, wash it twice with absolute ethanol and deionized water, put it in an oven and dry it under vacuum at 65°C for 24h to obtain modified CoFe 2 o 4 Nanoparticles, namely modified CFO nanoparticles.

[0061] According to the molar ratio Ba:Ti=1:1, titanium isopropoxide and citric acid were continuously stirred in 50ml ethanol, and heated at 90°C for 20min to obtain a titanium citrate solution; 0...

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Abstract

The invention discloses a ferromagnet composite polymer nanofilm. CFO serves as a core and is coated with insulated ferroelectric BT nanoparticles and a polydopamine (PDA) organic shell layer, the CFO@BT@PDA nanoparticles of a core-shell structure serve as an inorganic doping phase in a P(VDF-TrFE) polymer-based composite material, the inevitable agglomeration phenomenon of low-resistivity magnetic nanoparticles can be relieved, due to the high piezoelectric constant and dielectric constant of the insulated ferroelectric particles, the electrical performance of the film can be improved to a great extent, and the magnetoelectric effect is further improved.

Description

technical field [0001] The invention belongs to the technical field of magnetoelectric material preparation, and in particular relates to a ferromagnetic composite polymer nano film and a preparation method of the nano film. Background technique [0002] With the advancement of science and technology, the requirements for miniaturization and diversification of devices are getting higher and higher, which requires the development of new materials with two or more functions at the same time, so as to develop new devices that can realize multiple functions at the same time , multiferroic materials are one of the typical representatives. The concept of multiferroic materials was first clearly proposed by Schmid in Switzerland in 1994. This type of material contains two or more basic properties of iron, including ferroelectricity (antiferroelectricity), ferromagnetism (antiferromagnetism, ferrimagnetism) and ferroelasticity. All-in-one multifunctional materials have aroused gre...

Claims

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Application Information

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IPC IPC(8): C08L27/16C08K9/04C08K3/22C08K9/10C08J5/18
CPCC08J5/18C08J2327/16C08K3/22C08K9/04C08K9/10
Inventor 夏卫民周振基尹亚玲
Owner 贵州贤俊龙彩印有限公司
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