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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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, too high a filler content can also re

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

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Comparison scheme
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Example Embodiment

[0046] The preparation method of the multilayer structure flexible film of the high thermal conductivity and the three-stage shape memory includes the following steps:

[0047] (1) Sodium alginate is added to the dispersant, stirred overnight, and prepare a concentration of 1 to 3 mg / ml of sodium alginate dispersion;

[0048] (2) Oxide oxide is added to the dispersion, stirred for 2 h, ultrasonic 30min, formulated a graphene dispersion of 1 to 3 mg / ml of the concentration;

[0049](3) Thermoplastic polymer material is added to the dispersant, stirred from 0.5 to 1 h, ultrasound 5 to 10 min, and the thermoplastic polymer material dispersion of 1 to 3 mg / ml is formulated;

[0050] (4) The sodium oxide dispersion in step (1) is mixed with the gossipide dispersion in step (2) and the step (3), and the mixture is mixed according to the set weight ratio, stirred 0.5 ~ 1H, ultrasonic 10min, resulting in a concentration of 5 to 10 mg / ml oxide oxide-alginate-thermoplastic polymer m...

Example Embodiment

[0057] Example 1

[0058] The highly thermally conductive and three-stage shape memory of the present embodiment and the preparation method thereof, specifically a five-layer structure of the graphene-polymer material composite film, which is obtained by gossipide, sodium alginate , Polyethylene glycol and paraffin are made, and the mass percentage of graphene in the composite film is 20%, and 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] The composite film is formed on a pre-synthesized polyacrylamide hydrogel, including a single layer film and a multilayer film.

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

[0061] (1) Acrylamide, methylacrylamide, ammonium persulfate, distilled water, and add 100 ml of distilled water by mass than 15: 0.3: 0.3, and produce dispersion;

[0062] (2) Add 300 μl of tetramethylenediamine to the dispersi...

Example Embodiment

[0075] Example 2

[0076] The multilayer structure of the highly thermally conductive and tertiary shape of the present embodiment and the preparation method thereof, specifically a 10-layer structure of the graphene-polymer material composite film, which is substantially the same as in Example 1. Its difference is:

[0077] The composite film is made of oxidation graphene, sodium alginate, polycaprolactone and paraffin, and the mass percentage of oxide in the composite film is 40%, and the mass percentage of sodium alginate is 30%, polycaprolactone. The mass percentage is 15%, and the mass percentage of paraffin is 15%. The composite film needs to be formed on a pre-synthesized polyacrylamide hydrogel.

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

[0079] (1) Acrylamide, methylacrylamide, ammonium persulfate, distilled water, and add 100 ml of distilled water by mass than 15: 0.3: 0.3, and produce 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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