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A kind of anisotropic magnetic polymer composite film material and its preparation method

A technology of polymer materials and composite films, which is applied in the field of nanomaterial composite film preparation, can solve problems such as poor orientation, limited application range, and influence on the magnetic anisotropy performance of the film, and achieve good orientation, extended application range, and thin film thickness. easily controlled effects

Active Publication Date: 2021-06-29
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Currently, for the self-assembled nanowire structures reported under a magnetic field, there is a disadvantage of poor orientation, which seriously affects the magnetic anisotropy properties of the film and limits its application range.

Method used

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  • A kind of anisotropic magnetic polymer composite film material and its preparation method
  • A kind of anisotropic magnetic polymer composite film material and its preparation method
  • A kind of anisotropic magnetic polymer composite film material and its preparation method

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preparation example Construction

[0031] The present invention is an anisotropic magnetic polymer composite thin film material and a preparation method thereof, and its preparation process is as follows figure 1 , including the following steps:

[0032] 1. Mix Part A and Part B of the commercial polymer polydimethylsiloxane (PDMS) Hasuncast RTVS603 at a mass ratio of 1:1, and stir evenly to obtain a mixture;

[0033] 2. Grind the synthesized vacuum-dried FeCo cubic magnetic nanoparticles by hand for 20-40 minutes, add them into the mixture according to the mass fraction of 0.05%-10%, and ultrasonicate for 2-3 hours after stirring, so that the nanoparticles and polymers Mix well to form a homogeneous FeCo-PDMS mixture;

[0034] 3. Place the fully mixed FeCo-PDMS mixture in a vacuum environment and let it stand for 30 minutes to exhaust the air bubbles; use a cleaned glass or silicon wafer as the substrate, and use a spin coating device to remove the air bubbles from the FeCo-PDMS. The mixture is spin-coated i...

Embodiment 1

[0041] In this embodiment, an anisotropic magnetic polymer composite thin film material is prepared, wherein the applied magnetic field strength is 140 mT, and the mass fraction of FeCo cubic nanoparticles (170 nm) is 1%. Concrete preparation process is as follows:

[0042] 1. Weigh Part A and Part B of commercial polymer polydimethylsiloxane (PDMS) Hasuncast RTVS603, mix according to the mass ratio of 1:1, and stir to obtain a polymer;

[0043] 2. Grind the synthesized vacuum-dried FeCo magnetic nanoparticles by hand for 30 minutes, and evenly add them to the polymer according to the mass fraction of 1%. After stirring evenly, ultrasonic 3 hours, so that the nanoparticles and polymers are fully mixed to form a uniform FeCo-PDMS mixture;

[0044]3. Put the fully mixed FeCo-PDMS mixture in a vacuum box and let it stand for 30 minutes to exhaust the air bubbles; use a cleaned glass or silicon wafer as the substrate, and use a spin coating device to remove the air bubbles from t...

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Abstract

The invention discloses an anisotropic magnetic polymer composite film material and a preparation method thereof, belonging to the technical field of magnetic polymer composite materials. The composite film material includes FeCo magnetic nanoparticles and a polymer matrix. Preparation steps: 1) adding nano-FeCo cubic magnetic nanoparticles into the high molecular polymer, and stirring uniformly to obtain a mixture; 2) spin-coating the obtained mixture onto a glass sheet or a silicon sheet to form a thin film, and placing the obtained thin film on The "self-assembly" of magnetic particles is carried out in a magnetic field, and then solidified at a certain temperature to prepare an anisotropic magnetic polymer composite film. The invention has the advantages of simple process, easy control of film thickness, good directionality of the anisotropic self-assembled "nano rope", high production efficiency and good mechanical properties, and has potential application in high-tech fields such as flexible magnetic devices.

Description

technical field [0001] The invention relates to the technical field of nanomaterial composite film preparation, in particular to an anisotropic magnetic polymer composite film material and a preparation method thereof. Background technique [0002] Conventional magnetic nanomaterials include pure metal nanomaterials, metal alloy nanomaterials, and metal oxide nanomaterials, all of which are "hard materials" that are not suitable for flexible electronics. Compared with inorganic materials, polymeric materials have some unique properties, including flexibility, processability, transparency, etc. Therefore, mixing polymers and magnetic nanomaterials can obtain a mixture that has both the advantages of polymer materials and the properties of nanomaterials, thereby expanding the application range of materials. Magnetic polymer composites have become one of the research hotspots in emerging fields, attracting the interest of many researchers. At the same time, magnetic nanoparti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J5/18C08L83/04C08L33/12C08L63/00C08K3/00
CPCC08J5/18C08J2333/12C08J2363/00C08J2383/04C08K3/00C08K2201/01C08K2201/011
Inventor 刘志权远杰
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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