CN107660006A - A kind of low-voltage flexible electrothermal membrane and preparation method thereof - Google Patents
A kind of low-voltage flexible electrothermal membrane and preparation method thereof Download PDFInfo
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- CN107660006A CN107660006A CN201710536491.5A CN201710536491A CN107660006A CN 107660006 A CN107660006 A CN 107660006A CN 201710536491 A CN201710536491 A CN 201710536491A CN 107660006 A CN107660006 A CN 107660006A
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Classifications
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/20—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater
- H05B3/34—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater flexible, e.g. heating nets or webs
- H05B3/342—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater flexible, e.g. heating nets or webs heaters used in textiles
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/02—Details
- H05B3/03—Electrodes
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/10—Heater elements characterised by the composition or nature of the materials or by the arrangement of the conductor
- H05B3/12—Heater elements characterised by the composition or nature of the materials or by the arrangement of the conductor characterised by the composition or nature of the conductive material
- H05B3/14—Heater elements characterised by the composition or nature of the materials or by the arrangement of the conductor characterised by the composition or nature of the conductive material the material being non-metallic
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/20—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater
- H05B3/34—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater flexible, e.g. heating nets or webs
Abstract
The invention discloses a kind of low-voltage flexible electrothermal membrane and preparation method thereof, this kind of Electric radiant Heating Film includes insulating substrate, electrode layer, conductive heating layer, heat conduction and infra-red radiation layer and external wire, each layer is formed by printing, and drying is completed in drying tunnel, and this kind of Electric radiant Heating Film is applied to electric heating dress ornament.Advantage of the invention is that：Low-voltage (3.7V) realizes that large area is generated heat；The insulating protective layer of the top of current heating layer is substituted with heat conduction and radiating layer, this layer is provided simultaneously with insulation protection, heat conduction, the function of infra-red radiation；The method that the conductance for improving external electrode at present is substituted by the way of multiple spot external connection realizes that each point voltage on external electrode is essentially identical, reduces cost, while enhance the pliability and stability of electrode；Electric radiant Heating Film is made by the way of the printing of maturation, substitutes process numerous and diverse, time-consuming, harsh at present, reduces the technical threshold for making low-voltage flexible electrothermal membrane, is advantageously implemented the large-scale industrial production of this kind of Electric radiant Heating Film.
Description
Technical field
The present invention relates to a kind of low-voltage flexible electrothermal membrane and preparation method thereof, this kind of Electric radiant Heating Film is used for the dress ornament etc. that generates heat.
Background technology
It is logical that current heating dress ornament, such as cotton dress, down jackets, leather jacket, waist support, knee-pad, rib, shoe-pad, eyeshade are mostly
Cross the heat-barrier materials such as some cottons and fur to make, these materials do not possess the function of heat supply in itself, by reducing heat
Amount is scattered and disappeared to reach warming demand.But these dress ornaments it is warming when outside air temperature is relatively low effect it is undesirable, in order to reach
Necessary warming effect, realized often through the amount of increase clothing, this pursues the pursuit of light dressing with present people
It is inconsistent；And for clothes decoration, be only by the health-care effect to body that can reach of insulation it is extremely limited,
People need the dress ornament and health treatment that itself can generate heat, and this demand is even more urgent especially for the elderly.
Currently in order to realize the heat production of heating dress ornament, it is common practice to place Electric radiant Heating Film in dress ornament, but at present no matter
It is to be required for high voltage can be only achieved for resistance wire type Electric radiant Heating Film or the common mode for powering up pole at the both ends of Electric radiant Heating Film
Necessary heating temp, it is clear that so it is unsafe, the danger that electric leakage be present.
In order to avoid the dangerous of electric leakage, it is necessary to thicker insulating materials be used in the both sides of Electric radiant Heating Film, even if realizing low
Voltage generates heat, as that can reach preferable heating effect in the A of patent CN 104883760 within safe voltage, but its institute
It is difficult to prepare with material and expensive, preparation technology is numerous and diverse, it is necessary to special equipment, certainly will so bring yields low, system
Make cost height, it is difficult to the problem of mass producing, it is difficult to obtain the good market response.
The both sides of Electric radiant Heating Film use thicker insulating materials at present, and the problem of bringing is so that Electric radiant Heating Film towards human body side
Heat conduction and the effect of infra-red radiation have a greatly reduced quality, simultaneously so that whole electric heating film thickness increase, pliability are deteriorated, put
Sense of discomfort can be brought inside electric heating dress ornament to user by putting, or even influence clothing appearance.
In order to realize low-voltage (≤12V) and the impregnable effect of heating effect, generally require to use external electrode and interior
The mode of electrode realizes, the A of patent CN 105433464 are in order to realize the voltage change of optional position on any external electrode very
Small, silver-colored content is very high in required silver paste or uses the more preferable silver fillers of conductive effect, is so made except increasing considerably
The increase of external electrode fragility is also resulted in outside the cost of Electric radiant Heating Film, and in the dress ornament that generates heat, Electric radiant Heating Film is often by frequently curved
The situation of folding, current-carrying bar resistance is easily caused to increase, or even the appearance of open circuit.
The content of the invention
In order to solve the problems, such as to presently, there are, the invention provides a kind of low-voltage flexible electrothermal membrane and preparation method thereof,
This kind of Electric radiant Heating Film can be as the thermal source of electric heating dress ornament, including waist support, knee-pad, warming insole, heating pillow, heating cap, heating eye
Cover etc., resistance to flexion good with pliability, the uniform and excellent infrared health function of heating.
The technical scheme is that：
A kind of low-voltage flexible electrothermal membrane and preparation method thereof：Conductive heating layer is formed on insulating substrate, electrode layer
It is formed on conductive heating layer, heat conduction and infra-red radiation layer are formed on electrode layer, and external wire closely connects with electrode layer
Connect, or electrode layer is formed on insulating substrate, conductive heating layer is formed on electrode layer, heat conduction and infra-red radiation layer shape
Into on conductive heating layer, external wire is closely connected with electrode layer.
Described conductive exothermal layer material is nano-carbon material/resin complexes, nano-carbon material such as graphene, carbon nanometer
Pipe or the two different proportion it is compound, conductive heating layer square resistance is not higher than 60 Ω/mouth, the specific insulation of conductive heating layer
Not higher than 0.1 Ω cm.
Described electrode layer material is conductive filler/resin complexes, conductive filler for silver and the compound of graphene or
Silver is compound with CNT, it is preferred that conductive filler is silver-colored compound with graphene.
Replace in usual Electric radiant Heating Film insulating resin used with the heat conduction and infra-red radiation layer of electric insulation, this kind of heat conduction and red
External radiation layer is carbon material/resin complexes, nano-carbon material such as graphene, CNT, carbon black, graphite flake or a variety of carbon materials
Compound etc., resin such as PU, PMMA, PET, PC, PE, PVC or various kinds of resin combination etc. of material, the content 1 of conductive filler~
10wt%, it is preferred that content is 1~3wt%；The thickness of heat conduction and infra-red radiation layer is 1~100 μm, it is preferred that thickness 20
~50 μm.
Described conductive heating layer, electrode layer, heat conduction and infra-red radiation layer is formed by way of printing, i.e. this kind of electricity
The preparation of hotting mask is realized by way of current ripe printing completely, such as letterpress, intaglio printing, lithographic printing, silk screen
Printing, ink jet printing, preferable silk-screen printing.
Described external connection is connected with positive and negative external electrode, according to the length of positive and negative external electrode it is suitably homogenous adjust wiring point
Position and quantity, external connection can be connected at one end end of positive and negative external electrode, at the end of both ends or centre position；Preferably,
It is connected on 1/3 and 2/3 opening position of positive and negative external electrode；Further preferred external connection is connected on the 1/4,2/4,3/4 of positive and negative external electrode
Opening position.
This kind of Electric radiant Heating Film is used for generate heat dress ornament, portable heating equipment etc., using lithium battery as power supply.
Compared with the Electric radiant Heating Film in currently used for electric heating dress ornament, Electric radiant Heating Film provided by the present invention has the advantage that：
(1) Electric radiant Heating Film of the invention uses the scheme of internal and external electrode power supply, and low-voltage (3.7V) realizes large area Electric radiant Heating Film
Good heating effect, in the absence of the potential safety hazard of electric shock.
(2) this kind of Electric radiant Heating Film is integrally relatively thin, and pliability is good, and flexible resistance is good, is more applicable in dress ornament, for a long time
Keep stable using heating effect.
(3) formation of Electric radiant Heating Film of the invention is all realized by the way of printing highly developed at present, is not required to
Want the exothermic material transfer printing process that difficulty is big, it is not required that the process such as cutting electrode additionally, bonding outer layer insulation film, just
Same heating effect can be realized, reduce the technical threshold of electric heating film preparation, at the same reduce Electric radiant Heating Film preparation cost,
Preparation time, large-scale industrial production is advantageously implemented, with more the market competitiveness.
(4) in general insulating materials is changed to heat conduction radiating layer in the top of heating layer, while this layer of square resistance is still
It is very high by (106~108 Ω/mouth), but heat caused by heating layer can be caused effectively to be transmitted by infra-red radiation and heat transfer
To human body, be provided simultaneously with insulation, heat conduction, infra-red radiation function and add pliability.
(5) it can effectively realize that the voltage on external electrode is essentially identical by the way of more external connections, and then ensure electricity
Hotting mask generates heat uniform, and this kind of mode is greatly lowered into compared with using the method for the conductance for improving external electrode at present
Originally the pliability and stability of electrode and more be can guarantee that.
Brief description of the drawings
In order that technical scheme and beneficial effect are clearer, the present invention provides the one of accompanying drawing constitution instruction
Part, the present invention is explained together with embodiments of the present invention, is not construed as limiting the invention, accompanying drawing is said as follows
It is bright：
Fig. 1 is one of the structure chart of the wearable Electric radiant Heating Film of low-voltage (electrode layer is formed on conductive heating layer).
Fig. 2 is two (conductive heating layer is formed on electrode layer) of the structure chart of the wearable Electric radiant Heating Film of low-voltage.
Fig. 3 is Electric radiant Heating Film external cord schematic diagram.
Fig. 4 is the electrode layer schematic diagram of Electric radiant Heating Film in embodiment 1.
Fig. 5 is the electrode layer schematic diagram of Electric radiant Heating Film in embodiment 2.
1- heat conduction and infra-red radiation layer, 2- electrode layers, 3- conductive heating layers, 4- base materials, 5- external connections point, 6- external connections,
The positive external electrodes of 7-, 8- bear external electrode, the just interior electrodes of 9-, the negative interior electrodes of 10-.
Embodiment
Embodiments of the invention are not considered as limiting the invention, only several preferred embodiments, protection domain
Still it is defined by the content disclosed in claims.
Embodiment 1：
One layer of conductive heating layer of silk-screen printing in the PET film that thickness is 100 μm, drying tunnel is interior to dry, drying temperature 100
DEG C, drying time 15 minutes, resin is polyurethane in conductive heating layer, and filler is graphene, the content of graphene in the coating
For 20wt%, conductive heating layer thickness is 12 μm, coating square resistance about 50 Ω/mouth.
One layer of electrode layer of silk-screen printing on conductive heating layer, drying tunnel is interior to dry, 110 DEG C of drying temperature, drying time 15
Minute, for electrode layer using silver/graphite alkene composite guide plasma-based, external electrode width is 8mm, and interior electrode width is 1mm, adjacent interior
The distance between electrode is 7mm, interior electrode with it is outer be 7mm to the distance between electrode, pattern such as Fig. 4 institutes of printed electrode
Show.
One layer of heat conduction of silk-screen printing and infra-red radiation layer on electrode layer, and reserved in the opening position of Electric radiant Heating Film external electrode 1/2
Go out circular opening, dried in drying tunnel, 110 DEG C of drying temperature, drying time 15 minutes, resin is poly- in heat conduction and infra-red radiation layer
Urethane, filler are multi-walled carbon nanotube, and the content of multi-walled carbon nanotube in the coating is 8wt%, heat conduction and infra-red radiation thickness
Spend for 20 μm, coating square resistance is 108Ωcm。
In the external annealed copper wire of cavity position reserved.
Electric radiant Heating Film size is 6.5cm × 8cm, applies 3.7V voltages to it, and 90 DEG C of equilibrium temperature can be reached in 60 seconds.
Embodiment 2：
One layer of electrode layer of silk-screen printing in the PET film that thickness is 100 μm, drying tunnel is interior to dry, and 110 DEG C of drying temperature, dries
The dry 15 minutes time, electrode layer is 8mm using silver/graphite alkene composite guide plasma-based, external electrode width, and interior electrode width is
The distance between 1mm, adjacent inner electrodes is 7mm, interior electrode with it is outer be 7mm to the distance between electrode, the electricity of whole Electric radiant Heating Film
Pole layer is made up of four small units, and each junior unit is outer negative electrode in inboard, and outer positive electrode is in outside, printed electrode
Pattern it is as shown in Figure 5.
One layer of conductive heating layer of silk-screen printing on electrode layer, and reserved in the opening position of external electrode 1/2 of each junior unit
Going out circular opening, dried in drying tunnel, 100 DEG C of drying temperature, drying time 15 minutes, resin is polyurethane in conductive heating layer,
Filler is graphene, and the content of graphene in the coating is 15wt%, and conductive heating layer thickness is 12 μm, and coating square resistance is about
50 Ω/mouth.
One layer of heat conduction of silk-screen printing and infra-red radiation layer on conductive heating layer, and in the external electrode 1/2 of each junior unit
Opening position reserves circular opening, is dried in drying tunnel, 110 DEG C of drying temperature, drying time 15 minutes, heat conduction and infra-red radiation layer
Middle resin is polyurethane, and filler is multi-walled carbon nanotube, and the content of multi-walled carbon nanotube in the coating is 8wt%, heat conduction and red
External radiation thickness degree is 20 μm, and coating square resistance is 108Ωcm。
In the external annealed copper wire of cavity position reserved.
Electric radiant Heating Film size is 13cm × 16cm, applies 3.7V voltages to it, and 90 DEG C of equilibrium temperature can be reached in 60 seconds.
Claims (9)
1. a kind of low-voltage flexible electrothermal membrane and preparation method thereof, including insulating substrate, conductive heating layer, electrode layer, heat conduction and
Infra-red radiation layer and external wire, it is characterised in that：Conductive heating layer is formed on insulating substrate, and electrode layer is formed at conduction
On heating layer, heat conduction and infra-red radiation layer are formed on electrode layer, and external wire is closely connected with electrode layer, or electrode
Layer is formed on insulating substrate, and conductive heating layer is formed on electrode layer, and heat conduction and infra-red radiation layer are formed at conductive hair
On thermosphere, external wire is closely connected with electrode layer.
A kind of 2. low-voltage flexible electrothermal membrane according to claim 1 and preparation method thereof, it is characterised in that：Described leads
Electricity heating layer material is nano-carbon material/resin complexes, nano-carbon material such as graphene, CNT or the two different proportion
It is compound, conductive heating layer square resistance is not higher than 60 Ω/mouth, and the specific insulation of conductive heating layer is not higher than 0.1 Ω cm.
A kind of 3. low-voltage flexible electrothermal membrane according to claim 1 and preparation method thereof, it is characterised in that：Described electricity
Pole layer material is conductive filler/resin complexes, and conductive filler is answered for silver and the compound or silver-colored and CNT of graphene
Compound.
A kind of 4. low-voltage flexible electrothermal membrane according to claim 1 and preparation method thereof, it is characterised in that：With electric insulation
Heat conduction and infra-red radiation layer replace insulating resin used in usual Electric radiant Heating Film, this kind of heat conduction and infra-red radiation layer are carbon materials
Material/resin complexes, compound, the resin of nano-carbon material such as graphene, CNT, carbon black, graphite flake or various carbon materials
Such as the combination of PU, PMMA, PET, PC, PE, PVC or various kinds of resin, 1~10wt% of content of conductive filler, heat conduction and infrared
The thickness of radiating layer is 1~100 μm.
A kind of 5. low-voltage flexible electrothermal membrane according to claim 1 and preparation method thereof, it is characterised in that：Conductive filler
Preferable content is 1~3wt%；Heat conduction and the preferable thickness of infra-red radiation layer are 20~50 μm.
A kind of 6. low-voltage flexible electrothermal membrane according to claim 1 and preparation method thereof, it is characterised in that：Described leads
Electric heating layer, electrode layer, heat conduction and infra-red radiation layer are formed by way of printing, i.e., the preparation of this kind Electric radiant Heating Film is completely logical
The mode for crossing the printing of current maturation realizes, i.e. letterpress, intaglio printing, lithographic printing, silk-screen printing, ink jet printing.
A kind of 7. low-voltage flexible electrothermal membrane according to claim 1 and preparation method thereof, it is characterised in that：Described is outer
Wiring is connected with positive and negative external electrode, according to the length of positive and negative external electrode it is suitably homogenous adjust position and the quantity of wiring point, outside
Wiring is connected at one end end of positive and negative external electrode, at the end of both ends or centre position.
A kind of 8. low-voltage flexible electrothermal membrane according to claim 1 and preparation method thereof, it is characterised in that：External connection connects
In 1/3,2/3,1/4,2/4 or 3/4 opening position of negative external electrode.
A kind of 9. low-voltage flexible electrothermal membrane according to claim 1 and preparation method thereof, it is characterised in that：This kind of electric heating
Film is used for generate heat dress ornament, portable heating equipment, using lithium battery as power supply.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2016105861171 | 2016-07-25 | ||
| CN201610586117 | 2016-07-25 |
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| Publication Number | Publication Date |
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| CN107660006A true CN107660006A (en) | 2018-02-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710536491.5A Pending CN107660006A (en) | 2016-07-25 | 2017-06-27 | A kind of low-voltage flexible electrothermal membrane and preparation method thereof |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108834241A (en) * | 2018-04-25 | 2018-11-16 | 江苏工程职业技术学院 | A kind of preparation method of super soft olefinic carbon Electric radiant Heating Film |
| CN109104778A (en) * | 2018-08-07 | 2018-12-28 | 江阴亿霖包装有限公司 | A kind of production method of low-temp radiating electrothermal membrane |
| CN109602538A (en) * | 2018-05-28 | 2019-04-12 | 深圳市凯布尔科技有限公司 | A kind of intelligence eyeshade |
| CN109688647A (en) * | 2019-03-01 | 2019-04-26 | 无锡远稳烯科技有限公司 | A kind of manufacture craft of graphene carbon nano-tube film electric heating piece |
| CN109743798A (en) * | 2018-12-29 | 2019-05-10 | 北京创新爱尚家科技股份有限公司 | The preparation method of graphene flexible ventilating electric heating fabric |
| CN110493900A (en) * | 2019-08-06 | 2019-11-22 | 常州大学 | A kind of 36V and the PTC Electric radiant Heating Film of following low voltage drive and preparation method thereof |
| CN110606968A (en) * | 2019-10-23 | 2019-12-24 | 陕西科技大学 | Preparation method of titanium dioxide/graphene flexible electrothermal film |
| CN110944417A (en) * | 2019-11-18 | 2020-03-31 | 广州琛鑫电子材料有限公司 | Preparation method of flexible low-voltage heating component |
| CN110958725A (en) * | 2018-09-26 | 2020-04-03 | 青岛德通纳米技术有限公司 | Preparation method of flexible low-voltage composite polymer heating film |
| CN111194102A (en) * | 2019-12-30 | 2020-05-22 | 宁波柔碳电子科技有限公司 | Electric heating plate capable of generating heat uniformly, preparation method thereof and thick film heating element |
| CN111473400A (en) * | 2020-04-15 | 2020-07-31 | 安徽宇航派蒙健康科技股份有限公司 | Preparation method of graphene electrothermal picture |
| CN112291868A (en) * | 2020-09-14 | 2021-01-29 | 兰州大学 | Self-annealing graphene self-supporting high-temperature electrothermal film and preparation method thereof |
| WO2021143874A1 (en) * | 2020-01-17 | 2021-07-22 | 深圳市合元科技有限公司 | Heating device |
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| CN105517215A (en) * | 2015-04-24 | 2016-04-20 | 冯冠平 | Low-voltage transparent electrothermal film, preparation process thereof, high-temperature electrothermal sheet and preparation process thereof |
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| CN2666202Y (en) * | 2003-12-17 | 2004-12-29 | 范毅 | Flexible electric heating film waistcoat |
| CN101873729A (en) * | 2010-06-07 | 2010-10-27 | 刘忠耀 | Electric heating film and preparation method thereof |
| CN102602076A (en) * | 2012-03-01 | 2012-07-25 | 昆山市中迪新材料技术有限公司 | Heat conductive insulation sheet and structural adhesive |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108834241A (en) * | 2018-04-25 | 2018-11-16 | 江苏工程职业技术学院 | A kind of preparation method of super soft olefinic carbon Electric radiant Heating Film |
| CN109602538A (en) * | 2018-05-28 | 2019-04-12 | 深圳市凯布尔科技有限公司 | A kind of intelligence eyeshade |
| CN109104778A (en) * | 2018-08-07 | 2018-12-28 | 江阴亿霖包装有限公司 | A kind of production method of low-temp radiating electrothermal membrane |
| CN110958725A (en) * | 2018-09-26 | 2020-04-03 | 青岛德通纳米技术有限公司 | Preparation method of flexible low-voltage composite polymer heating film |
| CN109743798A (en) * | 2018-12-29 | 2019-05-10 | 北京创新爱尚家科技股份有限公司 | The preparation method of graphene flexible ventilating electric heating fabric |
| CN109688647A (en) * | 2019-03-01 | 2019-04-26 | 无锡远稳烯科技有限公司 | A kind of manufacture craft of graphene carbon nano-tube film electric heating piece |
| CN110493900A (en) * | 2019-08-06 | 2019-11-22 | 常州大学 | A kind of 36V and the PTC Electric radiant Heating Film of following low voltage drive and preparation method thereof |
| CN110606968A (en) * | 2019-10-23 | 2019-12-24 | 陕西科技大学 | Preparation method of titanium dioxide/graphene flexible electrothermal film |
| CN110944417A (en) * | 2019-11-18 | 2020-03-31 | 广州琛鑫电子材料有限公司 | Preparation method of flexible low-voltage heating component |
| CN111194102A (en) * | 2019-12-30 | 2020-05-22 | 宁波柔碳电子科技有限公司 | Electric heating plate capable of generating heat uniformly, preparation method thereof and thick film heating element |
| WO2021143874A1 (en) * | 2020-01-17 | 2021-07-22 | 深圳市合元科技有限公司 | Heating device |
| CN111473400A (en) * | 2020-04-15 | 2020-07-31 | 安徽宇航派蒙健康科技股份有限公司 | Preparation method of graphene electrothermal picture |
| CN112291868A (en) * | 2020-09-14 | 2021-01-29 | 兰州大学 | Self-annealing graphene self-supporting high-temperature electrothermal film and preparation method thereof |
| CN112291868B (en) * | 2020-09-14 | 2021-12-14 | 兰州大学 | Self-annealing graphene self-supporting high-temperature electrothermal film and preparation method thereof |
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Application publication date: 20180202 |