High-efficiency heat-conducting graphene far-infrared heating film and preparation method thereof

Abstract

The application discloses a kind of high-efficiency heat-conducting graphene far infrared heating film and preparation method thereof, the high-efficiency heat-conducting graphene far infrared heating film is made of polyacrylate sheet, polyethylene imine and graphene as main raw material, the high-efficiency heat-conducting graphene far infrared heating film has good photo-thermal conversion efficiency and heat conduction efficiency by adding graphene, and simultaneously, as the main substrate, polyacrylate sheet and polyethylene imine provide high biocompatibility and low cytotoxicity for the high-efficiency heat-conducting graphene far infrared heating film, greatly improve the safety of product.

Description

Technical Field

[0001] This invention belongs to the field of membrane material technology, specifically referring to a high-efficiency thermally conductive graphene far-infrared heating film and its preparation method. Background Technology

[0002] The human body emits far-infrared rays every moment. The wavelength of far-infrared rays is generally around 9.6μm. Graphene heating films can emit far-infrared waves of 6-14μm (commonly known as: life light waves), which are similar to the wavelength of the human body. They have the effects of activating cells, promoting blood circulation, accelerating metabolism, and improving the body's own immunity.

[0003] Polymethyl acrylate (PMMA) is non-toxic and has stable properties. It is widely used in industry, instrumentation, transportation, medical and health care, arts and crafts and other fields. It is a good raw material for preparing thin film materials. Polyethyleneimine is also widely used as a coating material for thin films due to its high biocompatibility and low cytotoxicity. Summary of the Invention

[0004] To address the above issues and overcome the shortcomings of existing technologies, this invention provides a high-efficiency thermally conductive graphene far-infrared heating film and its preparation method. By adding graphene, the high-efficiency thermally conductive graphene far-infrared heating film exhibits excellent photothermal conversion efficiency and thermal conductivity. Meanwhile, the polymethyl methacrylate sheet and polyethyleneimine, serving as the main substrates, provide the high-efficiency thermally conductive graphene far-infrared heating film with high biocompatibility and low cytotoxicity, significantly improving product safety.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: The present invention provides a high-efficiency thermally conductive graphene far-infrared heating film and its preparation method, wherein the high-efficiency thermally conductive graphene far-infrared heating film is made from polymethyl methacrylate sheets, polyethyleneimine and graphene as the main raw materials.

[0006] Furthermore, the polymethyl methacrylate sheet needs to be treated by a plasma processor to produce a hydrophilic surface before use.

[0007] Furthermore, the polymethyl methacrylate sheets are soaked in a polyethyleneimine solution for 20 minutes after treatment, and then soaked in a graphene solution for 20 minutes to obtain a sheet precursor.

[0008] Furthermore, the concentration of the polyethyleneimine solution is 1 mg / ml, and the concentration of the graphene solution is 5 mg / ml.

[0009] Furthermore, the sheet precursor is rinsed with deionized water and then dried by nitrogen purging for 24 hours.

[0010] Furthermore, the sheet precursor is cross-linked in a glutaraldehyde solution after drying for 24 hours.

[0011] Furthermore, the concentration of the glutaraldehyde solution is 5 wt%.

[0012] Furthermore, after the sheet precursor is crosslinked with glutaraldehyde solution, it is rinsed with deionized water and then dried by nitrogen purging for 24 hours to obtain the film precursor.

[0013] Furthermore, the film precursor is reacted with amino-terminated polyethylene glycol for 24 hours to obtain the high-efficiency thermally conductive graphene far-infrared heating film.

[0014] Furthermore, the polyethyleneimine has a molecular weight of 25,000, the glutaraldehyde has a purity of 99%, the nitrogen has a purity of 99.9%, and the amino-terminated polyethylene glycol has a purity of 98%.

[0015] The optimal beneficial effects achieved by this invention are as follows:

[0016] (1) By using polymethyl methacrylate sheets and polyethyleneimine as raw materials, the present invention enables the high-efficiency thermally conductive graphene far-infrared heating film to have high biocompatibility and low cytotoxicity, which greatly improves the safety of the product.

[0017] (2) This invention utilizes the high photothermal conversion efficiency and high thermal conductivity of graphene to prepare a high-efficiency thermally conductive graphene far-infrared heating film with good photothermal conversion efficiency and thermal conductivity. The photothermal conversion efficiency at 25℃ is 81.3%, and the thermal conductivity reaches 6.4 W / m·K.

[0018] (3) The present invention utilizes commercially available polymethyl methacrylate sheets and graphene, which are simple and readily available raw materials, reducing production costs and improving production efficiency. Attached Figure Description

[0019] Figure 1 The present invention provides a flowchart for the preparation of a high-efficiency thermally conductive graphene far-infrared heating film.

[0020] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof. Detailed Implementation

[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0022] In the embodiments of this invention, unless otherwise specified, the raw materials or processing techniques are all conventional commercially available raw materials or conventional processing techniques in the art. Unless otherwise indicated, all reagents used are commercially available reagents, purchased from the market and used directly without further purification.

[0023] Example

[0024] The present invention provides a high-efficiency thermally conductive graphene far-infrared heating film and its preparation method, specifically comprising: the high-efficiency thermally conductive graphene far-infrared heating film is prepared by using polymethyl methacrylate film, polyethyleneimine and graphene as the main raw materials.

[0025] The polymethyl methacrylate (PMMA) sheets were purchased from Sinopharm Chemical Reagent Co., Ltd., and the graphene was purchased from Hangzhou Gaoxi Technology Co., Ltd.

[0026] Among them, polymethyl methacrylate (PMMA) sheets need to be treated by a plasma processor to produce a hydrophilic surface before use.

[0027] The plasma processor was purchased from Opus Plasma Technology Co., Ltd., and its model number is SY-DT01.

[0028] In this process, polymethyl methacrylate sheets are soaked in a polyethyleneimine solution for 20 minutes after treatment, and then soaked in a graphene solution for 20 minutes to obtain a sheet precursor.

[0029] The polyethyleneimine solution has a concentration of 1 mg / ml, and the graphene solution has a concentration of 5 mg / ml.

[0030] The sheet precursor was rinsed with deionized water and then dried by nitrogen purging for 24 hours.

[0031] The sheet precursor was dried and then placed in a glutaraldehyde solution for cross-linking for 24 hours.

[0032] The concentration of glutaraldehyde solution is 5 wt%.

[0033] The sheet precursor is crosslinked with glutaraldehyde solution, rinsed with deionized water, and then dried by nitrogen purging for 24 hours to obtain the film precursor.

[0034] The film precursor is reacted with amino-terminated polyethylene glycol for 24 hours to obtain the high-efficiency thermally conductive graphene far-infrared heating film.

[0035] The polyethyleneimine has a molecular weight of 25,000, the glutaraldehyde has a purity of 99%, the nitrogen has a purity of 99.9%, and the amino-terminated polyethylene glycol has a purity of 98%.

[0036] Performance testing

[0037] The photothermal conversion performance of the high-efficiency thermally conductive graphene far-infrared heating film prepared in the examples was tested. The prepared high-efficiency thermally conductive graphene far-infrared heating film was placed in a 48-well plate, and 200 μL of deionized water was added to each well. The temperature change of the deionized water during far-infrared light (wavelength 9.6 μm) irradiation was measured using an electronic thermometer, and the photothermal conversion efficiency was calculated. Simultaneously, the thermal conductivity of the high-efficiency thermally conductive graphene far-infrared heating film prepared in the examples was also tested. The thermal conductivity was measured using a DRL-2B thermal conductivity meter purchased from Hunan Xiangke Company, and the test results are as follows:

[0038] (1) The photothermal conversion efficiency of the prepared high-efficiency thermally conductive graphene far-infrared heating film at 25℃ is 81.3%;

[0039] (2) The thermal conductivity of the high-efficiency thermally conductive graphene far-infrared heating film is 6.4 W / m·K.

[0040] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

[0041] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar experimental methods and embodiments without departing from the spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A high-efficiency thermally conductive graphene far-infrared heating film, characterized in that: The high-efficiency heat-conducting graphene far-infrared heating film is prepared by using polyacrylate sheet, polyethyleneimine and graphene as main raw materials. The polyacrylate sheet needs to be treated by a plasma processor to generate a hydrophilic surface before use. The polyacrylate sheet is soaked in a polyethyleneimine solution for 20 min after treatment, and then soaked in a graphene solution for 20 min to obtain a sheet layer precursor. The sheet layer precursor is rinsed with deionized water, and then dried by nitrogen blowing, with a drying time of 24 h. The sheet layer precursor is placed in a glutaraldehyde solution for crosslinking after drying, with a crosslinking time of 24 h. The sheet layer precursor is rinsed with deionized water after crosslinking with the glutaraldehyde solution, and then dried by nitrogen blowing, with a drying time of 24 h to obtain a film precursor. The film precursor is reacted with amino-terminated polyethylene glycol for 24 h to obtain the high-efficiency heat-conducting graphene far-infrared heating film.

2. The high-efficiency graphite graphene far-infrared heating film according to claim 1, characterized in that: The polyethyleneimine solution has a concentration of 1 mg / ml, and the graphene solution has a concentration of 5 mg / ml.

3. The high-efficiency graphite graphene far-infrared heating film according to claim 2, characterized in that: The glutaraldehyde solution has a concentration of 5 wt%.

4. The high-efficiency graphite graphene far-infrared heating film according to claim 3, characterized in that: The polyethyleneimine has a molecular weight of 25000, the glutaraldehyde has a purity of 99%, the nitrogen has a purity of 99.9%, and the amino-terminated polyethylene glycol has a purity of 98%.

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