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Multilayered-structure flexible film with high thermal conductivity and three-level shape memory characteristic and preparation method of multilayered-structure flexible film

A multi-layer structure, flexible film technology, applied in chemical instruments and methods, lamination, layered products, etc., can solve problems such as reducing the thermal conductivity of composites, achieve easy industrialization, reduce interface thermal resistance, and process compactness Effect

Pending Publication Date: 2021-06-11
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, too high a filler content can also reduce the thermal conductivity of the composite

Method used

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  • Multilayered-structure flexible film with high thermal conductivity and three-level shape memory characteristic and preparation method of multilayered-structure flexible film

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0046] The preparation method of the multilayer structure flexible film with high thermal conductivity and tertiary shape memory comprises the following steps:

[0047] (1) Add sodium alginate to the dispersant, stir overnight, and prepare a sodium alginate dispersion with a concentration of 1-3 mg / mL;

[0048] (2) Graphene oxide is added to the dispersant, stirred for 2 hours, ultrasonicated for 30 minutes, and a graphene oxide dispersion with a concentration of 1-3 mg / mL is prepared;

[0049](3) The thermoplastic polymer material is added to the dispersant, stirred for 0.5-1 hour, ultrasonicated for 5-10 minutes, and a thermoplastic polymer material dispersion with a concentration of 1-3 mg / mL is prepared;

[0050] (4) The sodium alginate dispersion in step (1) is mixed with the graphene oxide dispersion in step (2) and the thermoplastic polymer material dispersion obtained in step (3) according to the set weight ratio, and stirred for 0.5- 1h, ultrasonication for 10min, to...

Embodiment 1

[0058] The multi-layer structure flexible film with high thermal conductivity and three-stage shape memory and its preparation method provided by this implementation are specifically a five-layer structure graphene oxide-polymer material composite film, which is composed of graphene oxide, sodium alginate , polyethylene glycol and paraffin, the mass percentage of graphene oxide in the composite film is 20%, the mass percentage of sodium alginate is 40%, the mass percentage of polyethylene glycol is 20%, and the mass percentage of paraffin is 20%.

[0059] During the preparation process of the composite membrane, a membrane needs to be formed on a pre-synthesized polyacrylamide hydrogel, including a single-layer thin film and a multi-layer thin film.

[0060] Aforesaid polyacrylamide hydrogel, its synthetic steps are as follows:

[0061] (1) Add acrylamide, methylene acrylamide, ammonium persulfate, and distilled water to 100ml of distilled water at a mass ratio of 15:0.3:0.3 ...

Embodiment 2

[0076] The multilayer structure flexible film with high thermal conductivity and tertiary shape memory and the preparation method thereof provided in this implementation are specifically a 10-layer graphene oxide-polymer material composite film, which is basically the same as in Example 1, The difference is that:

[0077] The composite film is made of graphene oxide, sodium alginate, polycaprolactone and paraffin, the mass percent of graphene oxide in the composite film is 40%, the mass percent of sodium alginate is 30%, the polycaprolactone The mass percentage is 15%, and the mass percentage of paraffin wax is 15%. Composite membranes need to be formed on pre-synthesized polyacrylamide hydrogels.

[0078] Aforesaid polyacrylamide hydrogel, its synthetic steps are as follows:

[0079] (1) Add acrylamide, methylene acrylamide, ammonium persulfate, and distilled water to 100ml of distilled water at a mass ratio of 15:0.3:0.3 to obtain a dispersion;

[0080] (2) Add 300 μL of ...

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Abstract

The invention discloses a multilayered-structure flexible film with high thermal conductivity and a three-level shape memory characteristic. The multilayered-structure flexible film is a high-thermal-conductivity flexible graphene oxide-high polymer material composite film formed by laminating a plurality of single-layer films and having filler in highly oriented arrangement, and has high thermal conductivity anisotropy and the thermally-driven three-level shape memory characteristic. The multilayered-structure flexible film is prepared from the following components in percentage by weight: 20-40% of graphene oxide, 30-40% of sodium alginate and 30-40% of a thermoplastic high polymer material. The invention also discloses a preparation method of the film. The preparation method comprises the following steps: respectively adding the graphene oxide, the sodium alginate and the thermosetting polymer into a dispersant to prepare a dispersion liquid, then preparing a mixed liquid, and carrying out subsequent steps and drying to obtain a single layer of the multilayered-structure flexible film with high thermal conductivity and the three-level shape memory characteristic; and repeating the above operations multiple times, and stacking the single layers together to obtain the composite film. The flexible composite film has high in-plane thermal conductivity, flexibility, high thermal conductivity anisotropy and thermally-driven three-level shape memory performance, and is wide in application.

Description

technical field [0001] The invention relates to functional composite materials, which belong to the field of heat-conducting polymer material composite materials and shape-memory polymer material composite materials, in particular to a multi-layer structure flexible film with high thermal conductivity and three-stage shape memory and a preparation method thereof. Background technique [0002] In the era of rapid development of electronics, communications, and aerospace technology, electronic devices are developing in the direction of lightweight, high integration, miniaturization, and high power density. Thermal management materials have become an important factor in ensuring long-term stable operation of equipment. The thermal conductivity of materials is one of the key factors affecting the thermal management effect of materials. Polymer materials have the advantages of light weight and excellent mechanical properties, and are important application objects in this field. ...

Claims

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Application Information

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IPC IPC(8): B32B9/00B32B9/04B32B38/16B32B37/00C08J5/18C08L5/04C08L71/02C08L91/06C08L67/04C08L75/04C08K3/04C08J3/075C08F220/56C08F220/54C08L33/26
CPCC08J5/18B32B9/00B32B9/007B32B9/04B32B38/164B32B37/00C08J3/075C08F220/56C08J2305/04C08J2471/02C08J2491/06C08J2467/04C08J2475/04C08K3/042B32B2307/302C08J2333/26C08F220/54
Inventor 丁鹏宋玉婷
Owner SHANGHAI UNIV
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