A kind of multifunctional multiferroic ceramic polymer composite material and its application

A composite material, multiferroic ceramic technology, applied in the field of functional materials, can solve the problems of no response, complex structure, unable to meet performance requirements, etc., and achieve the effects of good dielectric, good flexibility, and excellent light response performance.

Active Publication Date: 2021-08-13
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the environment, there are generally multiple energies at the same time, such as mechanical energy, light energy and magnetic field energy, etc. However, PVDF-based polymers do not respond to the widespread presence of magnetic field energy and light energy in the environment.
Moreover, most of the existing materials can only collect one or two of them, which makes some environmental energy unable to be collected.
Existing methods for multiple energy harvesting generally consist of assembling two or more materials or devices with independent structures, which tends to increase the volume of the energy harvester and complicate the structure
Existing assembled devices often can only respond to type 2 stimuli, which cannot meet the higher performance requirements of electronic functional materials widely used in the information and communication industries in the current era of rapid development of big data and the Internet of Things.

Method used

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  • A kind of multifunctional multiferroic ceramic polymer composite material and its application
  • A kind of multifunctional multiferroic ceramic polymer composite material and its application
  • A kind of multifunctional multiferroic ceramic polymer composite material and its application

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preparation example Construction

[0077] The present invention also provides a method for preparing the above-mentioned multifunctional multiferroic ceramic polymer composite material, comprising the following steps:

[0078] The solution of the polymer matrix is ​​mixed with the bismuth ferrite-based ceramic material to prepare a thin film to obtain a multifunctional multi-ferroceramic polymer composite material.

[0079] Specifically, the polymer matrix is ​​mixed with an organic solvent to obtain a solution of the polymer matrix. Wherein, the organic solvent is selected from DMF.

[0080] Next, a bismuth ferrite-based ceramic material is added to the solution of the polymer matrix to obtain a mixed slurry. The mixed slurry is prepared into a thin film to obtain a multifunctional multiferroic ceramic polymer composite material.

[0081] Wherein, the method for preparing the mixed slurry into a thin film is not particularly limited in the present invention, and any method known to those skilled in the art w...

Embodiment 1

[0086] Example 1: BiFeO was prepared by electrospinning and subsequent high-temperature synthesis method 3 , 0.75BiFeO 3 -0.25BaTiO 3 ceramic nanofibers.

[0087] Preparation of 0.75BiFeO by Electrospinning 3 -0.25BaTiO 3 ceramic nanofibers. stoichiometric Bi(NO 3 ) 2 ·5H 2 O, Fe(NO 3 ) 3 9H 2 O, Ba(CH 3 COO) 2 , C 16 h 36 o 4 Ti,acac,CH 3 COOH, citric acid, and DMF were added to the Erlenmeyer flask and stirred evenly to form a mixed solution (see Table 1 for the amount of raw material formula), and 1.80g of PVP was added to the above solution, and stirred until the PVP was completely dissolved. Nanofibers were prepared with an electrospinning machine with a spinning voltage of 25 kV to obtain electrospun fibers. Nanofibers were synthesized in a muffle furnace at 600 °C for 2 h. see figure 1 , figure 1 0.75BiFeO prepared for Example 1 3 -0.25BaTiO 3 SEM images of ceramic nanofibers.

[0088]Table 1 0.75BiFeO 3 -0.25BaTiO 3 The formulation of the spinn...

Embodiment 2

[0093] Embodiment 2 prepares BiFeO by sol-gel method 3 ceramic nanoparticles.

[0094] Add 5 mmol Bi(NO 3 ) 2 ·5H 2 O, add 12mL of ethylene glycol, then add 5mmoL of Fe(NO 3 ) 3 9H 2 O, stir at 80°C until the gel is formed, then place the gel in a muffle furnace at 600°C for 30 minutes to synthesize BiFeO 3 ceramic nanoparticles. see figure 2 , figure 2 BiFeO prepared for Example 2 3 SEM image of ceramic nanoparticles.

[0095] Table 3 BiFeO 3 Sol-gel formulation.

[0096] Reagent Bi(NO 3 ) 2 ·5H 2 o

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Abstract

The invention provides a multifunctional multiferroic ceramic polymer composite material, which comprises a polymer matrix and multiferroic ceramics dispersed in the polymer matrix, and the multiferroic ceramics are bismuth ferrite-based composite ceramic nanofibers or particles . In the present invention, bismuth ferrite-based composite ceramic nanofibers or particles are composited with polymers, and the obtained composite material has excellent light response performance and good flexibility, which can meet the requirements for the use of electronic functional materials, and at the same time, the material also has good The multifunctionality of dielectric, ferroelectric, piezoelectric, magnetic, magnetoelectric coupling, etc., realizes the preparation of multifunctional multiferroic ceramic polymer composites.

Description

technical field [0001] The invention belongs to the technical field of functional materials, and in particular relates to a multifunctional multiferroic ceramic polymer composite material and its application. Background technique [0002] PVDF matrix material is a very important ferroelectric material, which is widely used in wearable materials for environmental energy harvesting in recent years. PVDF-based polymer materials are generally used for the conversion and collection of mechanical energy, thermal energy and electrical energy in the environment. Generally, there are multiple energies in the environment at the same time, such as mechanical energy, light energy and magnetic field energy, etc. However, PVDF-based polymers do not respond to the magnetic field energy and light energy that widely exist in the environment. Moreover, most of the existing materials can only collect one or two of them, which makes it impossible to collect some environmental energy. Existing...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): C08L27/16C08L75/04C08K7/08C08K3/24C08J5/18
CPCC08J5/18C08J2327/16C08J2375/04C08K3/24C08K7/08
Inventor初宝进胡欣萍车亚萍
OwnerUNIV OF SCI & TECH OF CHINA