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Polymer-based flexible composite material having both ferroelectric properties and ferromagnetic properties, and preparation method thereof

A magnetoelectric composite material and polymer technology, applied in the field of multiferroic magnetoelectric composite materials, can solve problems such as weak magnetoelectric effect, low Curie temperature, and practical application of functional devices

Active Publication Date: 2016-09-21
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the Curie temperature of single-phase multiferroic magnetoelectric compounds is generally low, and the magnetoelectric effect is weak, which limits their practical application in functional devices.

Method used

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  • Polymer-based flexible composite material having both ferroelectric properties and ferromagnetic properties, and preparation method thereof
  • Polymer-based flexible composite material having both ferroelectric properties and ferromagnetic properties, and preparation method thereof
  • Polymer-based flexible composite material having both ferroelectric properties and ferromagnetic properties, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Take 1.0056g CNT in a 250mL three-neck flask, add 120mL of H 2 SO 4 and 40mL HNO 3 Mixed solution; control the oxidation temperature at 50-60°C, ultrasonically oxidize for 24 hours, dilute the mixed dispersion obtained by ultrasonic oxidation with a large amount of distilled water, and centrifuge three times at high speed. The obtained suspension is decanted to remove the upper liquid, and the lower layer is dialysis The remaining acidic mixed solution was filtered off until the pH of the eluate was >5, and the product was vacuum-dried for 24 hours to obtain sCNTs for use.

[0035] Add 14.4mL of 0.697mol·L to a 500mL three-neck flask -1 FeCl 3 ·6H 2 O aqueous solution and 8 mL of 0.632 mol L -1 CoCl 2 ·6H 2 O aqueous solution was stirred and mixed, a certain mass of sCNT was added, and stirred until the sCNT was uniformly dispersed. Stir at a constant speed, mix 200mL, 1.5mol·L -1 NaOH aqueous solution was added dropwise to the above mixed dispersion, and the r...

Embodiment 2

[0040] Take 1.0048g CNT in a 250mL three-neck flask, add 120mL of H 2 SO 4 and 40mL HNO 3 Mixed solution; control the oxidation temperature at 50-60°C, ultrasonically oxidize for 18 hours; dilute the mixed dispersion obtained by ultrasonic oxidation with a large amount of distilled water, and centrifuge three times at a high speed. The remaining acidic mixed solution was filtered off until the pH of the precipitated solution was >5, and the product was vacuum-dried for 24 hours for use.

[0041] Add 14.6mL of 0.697mol·L to a 500mL three-neck flask -1 FeCl 3 ·6H 2 O aqueous solution and 8 mL of 0.632 mol L -1 NiCl 2 ·6H 2 O aqueous solution was stirred and mixed, 0.028g sCNT was added, and stirred until the sCNT was uniformly dispersed. Stir at a constant speed, mix 150mL, 1.5mol·L -1 NaOH aqueous solution was added dropwise to the above mixed dispersion, and the reaction temperature was maintained at 90°C. Constant temperature reaction 3h. After the reaction, the re...

Embodiment 3

[0045] Take 0.9986g CNT in a 250mL three-neck flask, add 120mL of H 2 SO 4 and 40mL HNO 3 Mixed solution; control the oxidation temperature at 50-60°C, ultrasonically oxidize for 18 hours; dilute the mixed dispersion obtained by ultrasonic oxidation with a large amount of distilled water, and centrifuge three times at a high speed. The remaining acidic mixed solution was filtered off until the pH of the precipitated solution was >5, and the product was vacuum-dried for 24 hours for use.

[0046] Add 14.4mL of 0.697mol L to a 500mL three-neck flask -1 FeCl 3 ·6H 2 O aqueous solution and 7.8 mL of 0.632 mol L -1 MnCl 2 ·6H 2 The O aqueous solution was stirred to mix, and 0.026 g of sCNT tubes were added, and stirred until the sCNTs were uniformly dispersed. Stir at a constant speed, mix 150mL, 1.5mol·L -1 NaOH aqueous solution was added dropwise to the above mixed dispersion, and the reaction temperature was maintained at 60°C. Constant temperature reaction 7h. After ...

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Abstract

The invention relates to a polymer-based multiferroic magnetoelectric composite material having both ferroelectric properties and ferromagnetic properties. The composite material is characterized by being formed through mixing up one-dimensional OD-MFe2O4 ferromagnetic elements with the fluoropolymer cPVDF material. The one-dimensional OD-MFe2O4 ferromagnetic elements are obtained through growing an MFe2O4 ferromagnetic compound on the surface of a one-dimensional functionalized material, wherein M=Fe, Co, Ni, Mn and Zn. According to the technical scheme of the invention, ferrites (MFe2O4, M=Fe, Co, Ni, Mn and Zn) and magnetic nanoparticles are loaded on the surface of the one-dimensional functionalized material through the in-situ assembling process, so that the one-dimensional material-magnetic nano-material (OD-MFe2O4) of a specific dimension and a specific surface activity is automatically synthesized. Therefore, the uniform dispersion of ferromagnetic OD-MFe2O4 in a ferroelectric polymer matrix is realized through compounding the ferroelectric polymer matrix with ferromagnetic OD-MFe2O4. Meanwhile, the good integration of an inorganic phase and an organic phase is realized. As a result, a ferromagnetic phase is highly ordered in a composite system. The wholly new multiferroic magnetoelectric composite material having both ferroelectric properties and ferromagnetic properties is prepared.

Description

technical field [0001] The invention relates to a multiferroic magnetoelectric composite material with excellent magnetoelectric coupling ability, and the ferromagnetic composite material can be used to prepare flexible films, wires, sheets and the like. Background technique [0002] Multiferroic materials refer to materials that contain two or more basic properties of iron (including ferroelectricity, ferromagnetism, and ferroelasticity) in the same phase. Multiferroic materials can not only realize the controllable transformation and synergy between different physical properties, but also produce new effects and functions through the synergistic coupling of material components, such as magnetoelectric effect. Based on these peculiar effects, multiferroic materials are widely used in new functional devices, such as multi-state memory elements, broadband magnetic sensors, ferromagnetic resonance devices with controllable electric fields, dual magneto-optical / electro-optic de...

Claims

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Application Information

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IPC IPC(8): C08L27/16C08L77/10C08K9/02C08K7/24C08K3/22C08J5/18
CPCC08J5/18C08J2327/16C08J2477/10C08K3/22C08K7/24C08K9/02C08K2003/2265C08K2003/2289C08K2003/2293C08K2201/011C08L27/16C08L2203/16C08L2205/16C08L77/10C08K2003/2275C08K2003/2296
Inventor 董丽杰冯锐李立柳扬赵广辉宋少坤
Owner WUHAN UNIV OF TECH
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