Search

CN-122028232-A - Gradient temperature control flexible electronic heating device and preparation method thereof

CN122028232ACN 122028232 ACN122028232 ACN 122028232ACN-122028232-A

Abstract

The invention discloses a gradient temperature control flexible electronic heating device and a preparation method thereof. The preparation method comprises the steps of selecting three layers of composite insulating materials as a base material, wherein the three layers of composite insulating materials comprise upper and lower layers of aramid paper and a polyimide film positioned between the two layers of aramid paper, performing line scanning laser direct writing processing on the aramid paper on one surface of the base material by adopting a pulse laser to induce and generate a three-dimensional porous graphene network layer, preparing electrodes on the three-dimensional porous graphene network layer to obtain a gradient temperature control flexible electronic heating device, and forming a temperature gradient gradually decreasing from a central area to an edge area after the gradient temperature control flexible electronic heating device applies bias voltage. The invention utilizes the thermal property and structure of the material to realize the gradient thermal field distribution of the central heat and the edge temperature which meet the physical therapy requirement of human body under the drive of single voltage, and has the advantages of low cost, high flexibility and quick response.

Inventors

  • ZHANG CHENGYUN
  • CHEN XINGYU
  • YANG HAILIN

Assignees

  • 广州大学

Dates

Publication Date
20260512
Application Date
20260211

Claims (10)

  1. 1. The preparation method of the gradient temperature control flexible electronic heating device is characterized by comprising the following steps of: (1) Three layers of composite insulating materials are selected as base materials, and each layer of composite insulating materials consists of an upper layer of aramid paper, a lower layer of aramid paper and a polyimide film positioned between the two layers of aramid paper; (2) Carrying out line scanning laser direct writing processing on aramid paper on one surface of a substrate by adopting a pulse laser, and inducing to generate a three-dimensional porous graphene network layer; (3) And preparing an electrode on the three-dimensional porous graphene network layer to obtain a gradient temperature-control flexible electronic heating device, wherein the gradient temperature-control flexible electronic heating device forms a temperature gradient gradually decreasing from a central area to an edge area after applying bias voltage.
  2. 2. The method for manufacturing a gradient temperature-controlled flexible electronic heating device according to claim 1, wherein the line scanning laser direct writing processing in step (2) comprises the following specific process parameters: The laser power is 1.8-2.0W, the scanning speed is 140-150 mm/s, and the scanning interval is 35-45 μm.
  3. 3. The method of manufacturing a gradient temperature controlled flexible electronic heating device according to claim 2, wherein the pulsed laser is a pulsed laser with a wavelength of 10.64 μm.
  4. 4. The method for manufacturing a gradient temperature-controlled flexible electronic heating device according to claim 1, wherein the polyimide film blocks laser penetration during the line scanning laser direct writing process, and laser induction is limited to aramid paper on one surface only.
  5. 5. The method for manufacturing the gradient temperature control flexible electronic heating device according to claim 1, wherein the thickness of the aramid paper in the three-layer composite insulating material is 30-60 μm, and the thickness of the polyimide film is 120-150 μm.
  6. 6. The method for preparing the gradient temperature control flexible electronic heating device according to claim 1, wherein the electrode is prepared on a three-dimensional porous graphene network layer, specifically, the three-dimensional porous graphene network layer is square, conductive silver paste is coated on edge areas of two opposite sides, and copper foil is adhered to the edge areas to serve as the electrode.
  7. 7. The gradient temperature control flexible electronic heating device is characterized by sequentially comprising a three-dimensional porous graphene network layer, a polyimide film and a lower aramid paper layer, wherein the three-dimensional porous graphene network layer is generated by laser induction of aramid paper.
  8. 8. The use of the gradient temperature control flexible electronic heating device as claimed in claim 7 for preparing mirror face defogging patches, flexible medical physiotherapy skin patches and light source detectors.
  9. 9. The use of claim 8, wherein the flexible medical treatment skin patch is applied with a bias voltage of 2-2.5 v in use.
  10. 10. The use according to claim 8, wherein the temperature of the central area is 45-55 ℃ and the temperature of the peripheral area is 37-40 ℃ when the flexible medical skin patch is in use.

Description

Gradient temperature control flexible electronic heating device and preparation method thereof Technical Field The invention relates to the field of flexible electronic heating devices and preparation thereof, in particular to a gradient temperature control flexible electronic heating device and a preparation method thereof. Background Flexible devices have become a focus of attention in many discipline fields due to their excellent stretchability, flexibility, and wide range of applications. The flexible material and the functional material, such as the semiconductor material, are compounded to prepare the multifunctional flexible composite material, and the flexible photoelectric detector, the flexible heater and the like are further developed on the basis of preparation. However, existing flexible heaters mostly pursue single temperature uniformity. In practical biomedical applications, such as joint hot compress or traditional Chinese medicine acupoint thermal moxibustion, a non-uniform "gradient thermal field" is often required, i.e. high temperature stimulation (e.g. 45-50 ℃) is realized in the center of the acupoint, and a lower temperature (e.g. 37-40 ℃) is maintained in the peripheral region to prevent scalding and provide thermal buffering. Conventional screen printing or coating processes have difficulty in achieving such complex resistance distributions on the same substrate at one time, and often require splicing of different materials, resulting in complex processes and unstable interfaces. Disclosure of Invention In order to overcome the defects and shortcomings of the prior art, the invention aims to provide a gradient temperature control flexible electronic heating device and a preparation method thereof, wherein a composite material with a three-layer structure of aramid paper-polyimide film-aramid paper is adopted as a base material, a porous graphene structure is induced on one side of the aramid paper by using laser as a heating base, and the thermal characteristics and the structure of the material are utilized to realize the gradient thermal field distribution of 'central heat and edge temperature' meeting the physical therapy requirement of a human body under the drive of single voltage, and meanwhile, the gradient thermal field distribution has the advantages of low cost, high flexibility and quick response. The aim of the invention is achieved by the following technical scheme: The invention provides a preparation method of a gradient temperature control flexible electronic heating device, which comprises the following steps: (1) Three layers of composite insulating materials are selected as base materials, and each layer of composite insulating materials consists of an upper layer of aramid paper, a lower layer of aramid paper and a polyimide film positioned between the two layers of aramid paper; (2) Carrying out line scanning laser direct writing processing on aramid paper on one surface of a substrate by adopting a pulse laser, and inducing to generate a three-dimensional porous graphene network layer; (3) And preparing an electrode on the three-dimensional porous graphene network layer to obtain a gradient temperature-control flexible electronic heating device, wherein the gradient temperature-control flexible electronic heating device forms a temperature gradient gradually decreasing from a central area to an edge area after applying bias voltage. In some embodiments of the present invention, the line scanning laser direct writing processing in step (2) includes the following specific process parameters: The laser power is 1.8-2.0W, the scanning speed is 140-150 mm/s, and the scanning interval is 35-45 μm. In some embodiments of the invention, the pulsed laser is a pulsed laser having a wavelength of 10.64 μm. In some embodiments of the invention, the polyimide film blocks laser penetration during the line scan laser direct write process, and laser induction is limited to aramid paper on only one of the surfaces. In some embodiments of the present invention, in the three-layer composite insulating material, the thickness of the aramid paper is 30 to 60 μm, and the thickness of the polyimide film is 120 to 150 μm. In some embodiments of the invention, the electrode is prepared on a three-dimensional porous graphene network layer, specifically, the three-dimensional porous graphene network layer is square, conductive silver paste is coated on edge areas of two opposite sides, and copper foil is adhered to the edge areas to serve as the electrode. The invention further provides a gradient temperature control flexible electronic heating device which sequentially comprises a three-dimensional porous graphene network layer, a polyimide film and a lower aramid paper layer, wherein the three-dimensional porous graphene network layer is formed by laser induction of aramid paper. The invention also provides application of the gradient temperature control flexible electronic heating dev