CN110351906B - Textile material with flexible electric heating function, preparation method and application thereof - Google Patents

Textile material with flexible electric heating function, preparation method and application thereof Download PDF

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Publication number
CN110351906B
CN110351906B CN201910704708.8A CN201910704708A CN110351906B CN 110351906 B CN110351906 B CN 110351906B CN 201910704708 A CN201910704708 A CN 201910704708A CN 110351906 B CN110351906 B CN 110351906B
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layer
textile material
flexible
preparing
insulating layer
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CN110351906A (en
Inventor
曹慧
毛思宁
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Ningbo Renhe Technology Co ltd
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Ningbo Renhe Technology Co ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • 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
    • H05B3/20—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
    • H05B3/345—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 knitted fabrics
    • 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
    • H05B3/36—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater flexible, e.g. heating nets or webs heating conductor embedded in insulating material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B32B2255/20—Inorganic coating
    • B32B2255/205—Metallic coating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/20—Properties of the layers or laminate having particular electrical or magnetic properties, e.g. piezoelectric
    • B32B2307/206—Insulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/51—Elastic

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Surface Heating Bodies (AREA)
  • Resistance Heating (AREA)

Abstract

The invention provides a textile material with a flexible electric heating function and a preparation method thereof. The textile material is of a laminated structure and sequentially comprises a first textile material layer, a first flexible insulating layer, a flexible heating layer, a second flexible insulating layer and a second textile material layer from bottom to top; the flexible heating layer is made of liquid metal and is electrically connected with one end of the electrode, and the other end of the electrode is connected with a power supply. Under the condition of electrifying, the liquid metal heats, the electric heating function of the textile material is realized, and the textile material is comfortable to wear, and can still keep the stability of electric heating when being deformed, so the textile material has good application prospect in the clothing field and other environments needing heating.

Description

Textile material with flexible electric heating function, preparation method and application thereof
Technical Field
The invention relates to the technical field of textile materials and flexible electronic materials, in particular to a textile material with a flexible electric heating function, and a preparation method and application thereof.
Background
The proper temperature is a very important factor for human survival, and too low a temperature can lead to frostbite of the human body and even endanger human life. In the cold winter in the north of China, the traditional warm keeping method is to wear thick and heavy cotton-padded clothes to prevent the heat loss of the body and ensure that the body temperature is in a normal temperature range. However, the cotton-padded clothes have larger volume and weight, so that the cotton-padded clothes have strong bulkiness and are inconvenient to move freely.
With the progress of society, the requirements of people on clothes are gradually improved, and attractive, fashionable, comfortable and portable clothes are increasingly popular. In order to increase the warmth retention property, a heating device such as an electric heating wire or an electric heating tube is arranged on the inner layer of textile materials or clothes, and heat is generated by power supply. However, the heating wire and the electric heating tube have larger volume, and the problem of poor fit with textile materials and clothes and poor comfort after wearing exists. At present, the technology of heating graphene and the like appears in the market, but the graphene material has no flexibility, and can not work normally under the stress effects of stretching, bending and the like, especially at the positions of knees, elbows and the like.
Therefore, achieving a textile material that has a heating function, is comfortable to wear, has no foreign matter feel, and at the same time has been one of the subjects of research by technical workers.
Disclosure of Invention
Aiming at the technical current situation in the textile clothing field, the invention provides a novel textile material which has an electric heating function, can still keep the electric heating function under the conditions of stretching, bending and the like, and is comfortable to wear and free from foreign matter.
The technical scheme provided by the invention is as follows: the textile material with the flexible electric heating function is of a laminated structure and sequentially comprises a first textile material layer, a first flexible insulating layer, a flexible heating layer, a second flexible insulating layer and a second textile material layer from bottom to top; the flexible heating layer is made of liquid metal;
the flexible heating layer is electrically connected with one end of the electrode, and the other end of the electrode is connected with a power supply.
In the invention, flexibility refers to the property that deformation such as bending, stretching and the like can occur under the action of no external force; elasticity is a kind of flexibility, and refers to a property that can be deformed by an external force such as bending, stretching, etc., and has a certain shape recovery ability when the external force is removed.
Preferably, the flexible heating layer has a thickness of less than 500um, preferably less than 100um, even less than 10um.
The liquid metal is a metal conductive material which is liquid at room temperature, has flexibility and can be deformed by stretching, bending and the like. The liquid metal includes, but is not limited to, mercury, gallium indium alloy, gallium indium tin alloy, and one or more doped gallium indium alloy, gallium indium tin alloy, etc. of transition metals, solid nonmetallic elements.
Preferably, the liquid metal is in a patterned structure on the surface of the first flexible insulating layer. The pattern is not limited, and comprises one or more than two patterns formed by juxtaposition, intersection, stacking and the like of straight lines, sine lines, wave lines, sawtooth waves, triangular waves, ellipses, rings, coil shapes, heart shapes and the like.
The first textile material layer is a fabric formed by one or more of cotton, hemp, wool, silk, woolen cloth, fiber and the like, and has flexibility. Preferably, the first textile material layer has elasticity. Preferably, the first textile material layer has a thickness of 0.25-1.0mm.
The second textile material layer is a fabric formed by one or more of cotton, hemp, wool, silk, woolen cloth, fiber and the like, and has flexibility. Preferably, the first textile material layer has elasticity. Preferably, the second textile material layer has a thickness of 0.25-1.0mm.
The first flexible insulating layer is not limited in material and comprises a flexible high polymer material and the like. As a further preferred aspect, the first flexible insulating layer is made of a flexible material having good adhesion to the first textile material layer, for example, one or more of TPE, TPU, TPV, SBS, SEBS, silica gel, polydimethylsiloxane (PDMS), polyethylene phthalate, polyvinyl alcohol formaldehyde, polyethylene, rubber, POE, ecoflex, and the like. As a further preference, the first flexible insulating layer material has elasticity. Preferably, the thickness of the first flexible insulating layer is 0.05-0.50mm.
The second flexible insulating layer is not limited in material and comprises a flexible high polymer material and the like. As a further preferred aspect, the second flexible insulating layer is made of a flexible material having good adhesion to the second textile material layer, such as TPE, TPU, TPV, SBS, SEBS, silica gel, polydimethylsiloxane (PDMS), polyethylene phthalate, polyvinyl alcohol formaldehyde, polyethylene, rubber, POE, ecoflex, or a combination of one or more materials. As a further preference, the second flexible insulating layer material has elasticity. Preferably, the thickness of the first flexible insulating layer is 0.05-0.50mm.
Preferably, carbon-based materials such as carbon and graphene are doped in the first flexible insulating layer material, so that heating energy can be converted into far infrared rays to realize a far infrared heating function besides flexible insulation.
Preferably, carbon-based materials such as carbon and graphene are doped in the second flexible insulating layer material, so that heating energy can be converted into far infrared rays to realize a far infrared heating function besides flexible insulation.
Preferably, a first heat conducting layer is arranged between the first textile material layer and the first flexible insulating layer, and is used for improving heat conduction effect, and the heat conducting material comprises, but is not limited to, liquid metal and the like.
Preferably, a second heat conducting layer is disposed between the second textile material layer and the second flexible insulating layer, for improving heat conduction effect, and the heat conducting material includes, but is not limited to, liquid metal and the like.
Preferably, the liquid metal is doped with magnetic particles, that is, the flexible heating layer can also realize a heating function through an alternating magnetic field, so that the heating function of the flexible heating layer can also be realized in a non-electric heating working mode.
The invention also provides a preparation method of the textile material with the flexible electric heating function, which comprises a treatment process A on the surface of the first textile material layer and a treatment process B on the surface of the second textile material layer;
Process a: preparing a first flexible insulating layer on the surface of the first textile material layer; preparing a flexible heating layer on the surface of the first flexible insulating layer; electrically connecting the liquid metal in the flexible heating layer with one end of an electrode to obtain a composite layer A;
process B: preparing a second flexible insulating layer on the surface of the second textile material layer to obtain a composite layer B;
Then, the composite layer A and the composite layer B are connected, so that the second flexible insulating layer is positioned on the surface of the flexible heating layer.
In the process a, preferably, a first flexible insulating layer is prepared on the surface of the first textile material layer by a hot pressing method.
In the process a, as an optimization, a hollow template is adopted, the template is placed on the surface of the first flexible insulating layer, liquid metal is filled in the hollow of the template through methods such as pouring, coating, printing or hot pressing, a liquid metal layer is obtained, and then the template is removed. The template is used for forming a liquid metal layer, plays a role in positioning a liquid metal boundary in the preparation process of the liquid metal layer, and can be directly removed after the liquid metal layer is formed. When the liquid metal layer is in a certain pattern, the template is used for forming the patterned liquid metal layer, plays a role in positioning the boundary of the liquid metal pattern in the preparation process of the liquid metal layer, and the mould can be directly removed after the patterned liquid metal layer is formed. Thus, with this method, a liquid metal layer of smaller three-dimensional dimensions can be obtained, in particular a liquid metal layer of smaller thickness and width, of the order of hundreds of micrometers, preferably less than 500um, more preferably less than 100um, and even less than 10um.
In the process B, preferably, a second flexible insulating layer is prepared on the surface of the second textile material layer by a hot pressing method.
In the process B, preferably, a hollow template is used, the template is placed on the surface of the second flexible insulating layer, the liquid metal is filled in the hollow of the template through casting, coating, printing or hot pressing, so as to obtain a liquid metal layer, and then the template is removed. The template is used for forming a liquid metal layer, plays a role in positioning a liquid metal boundary in the preparation process of the liquid metal layer, and can be directly removed after the liquid metal layer is formed. When the liquid metal layer is in a certain pattern, the template is used for forming the patterned liquid metal layer, plays a role in positioning the boundary of the liquid metal pattern in the preparation process of the liquid metal layer, and the mould can be directly removed after the patterned liquid metal layer is formed. Thus, with this method, a liquid metal layer of smaller three-dimensional dimensions can be obtained, in particular a liquid metal layer of smaller thickness and width, of the order of hundreds of micrometers, preferably less than 500um, more preferably less than 100um, and even less than 10um.
The method of joining the composite layer a and the composite layer is not limited, and preferably, thermal compression bonding is used.
Compared with the prior art, the invention has the following technical effects:
(1) According to the invention, the liquid metal is combined with the textile material matrix, and the liquid metal generates heat under the condition of electrifying, so that the electric heating function of the textile material is realized; in addition, as the liquid metal has flexibility, the textile material can be deformed such as stretching, bending and the like, so that the textile material is comfortable to wear, has good fit with a wearing body, can heat all parts of the wearing body, and can still keep the stability of electric heating when the wearing body is deformed. In particular, when the first textile material layer, the second textile material layer, the first flexible insulating layer and the second flexible insulating layer are all elastic, the liquid metal has elasticity, so that the wearing comfort is better and the electric heating performance when the liquid metal is deformed can still be kept stable.
Therefore, the textile material has good application prospect in the clothing field, such as the fields of functional clothing, intelligent clothing and the like, can realize comfortable wearing and good fit with the body, and can heat all parts of the body, including joint parts, vertebral body parts and the like which are easy to stretch and bend; meanwhile, the textile material can be used in other environments needing heating, such as mirror defrosting, medical heating rehabilitation devices and the like, and can meet the requirements of mirrors with different sizes and shapes and the requirements of parts to be rehabilitated with different shapes due to flexibility.
(2) In the invention, the thickness of the liquid metal layer can reach the order of hundred micrometers, preferably less than 500 micrometers, more preferably less than 100 micrometers, even less than 10 micrometers, so that the wearability and the comfort of the textile substrate can be further improved, and the influence of the external forces such as folding, rubbing, extrusion and the like on the textile substrate in practical application is greatly reduced due to the ultrathin liquid metal layer, so that the stability of the heating performance of the textile substrate is improved.
(3) The method comprises the steps of adopting a layer-by-layer preparation method to prepare a first insulating layer on the surface of a first textile material, and then preparing a liquid metal layer on the surface of the first insulating layer; preparing a second insulating layer on the surface of the second textile material; then, the second insulating layer is connected to the surface of the liquid metal layer, so that the method has the advantages of simplicity, easiness in control and high yield.
(4) According to the invention, the liquid metal layer is preferably prepared by adopting the mould, and the mould has different functions from the mask plates in the prior art, so that on one hand, the mould with the liquid metal layer with smaller three-dimensional size can be obtained, and on the other hand, after filling the liquid metal in the mould, the mould material can be conveniently and simply removed, thereby conveniently obtaining the liquid metal layer with smaller three-dimensional size, especially conveniently obtaining the liquid metal layer with smaller thickness and width, and the thickness of the liquid metal layer is ultrathin and can reach hundreds of micrometers, preferably less than 500 micrometers, more preferably less than 100 micrometers, even less than 10 micrometers.
(5) As an optimized implementation mode, the first flexible insulating layer and the second flexible insulating layer are prepared in a hot-pressing mode, so that the material characteristics of the textile material can be fully exerted, and the flexible insulating layer with high combination property with the textile material, simple preparation and high yield can be obtained; then, preparing a liquid metal layer by adopting a die to obtain ultrathin liquid metal; finally, bonding the second flexible insulating layer on the second textile material layer with the liquid metal layer by adopting a hot pressing method. Because the liquid metal is ultrathin, the problems of overflow, deformation and the like of the liquid metal can be effectively avoided in the hot pressing process, so that the basic structure of the liquid metal can be kept unaffected, and the stability of the electric heating performance of the liquid metal is effectively improved. Experiments prove that compared with the prior art, the repeatability is greatly improved when the method is used for preparing the textile material with the flexible electric heating function, the yield is effectively improved, the cost is greatly reduced, and the electric heating performance is stable.
Drawings
The present invention will be described in further detail below with reference to the drawings and examples, and it should be noted that the examples are intended to facilitate the understanding of the present invention without any limitation thereto.
FIG. 1 is a schematic structural view of a textile material with flexible electrical heating according to the present invention;
FIG. 2 is a schematic illustration of the process of making a textile material with flexible electrical heating according to the present invention;
Fig. 3 is a graph showing the heating effect of the textile material having the flexible electric heating function in the stretched state in example 1 of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the following examples and drawings, and it should be noted that the following examples are intended to facilitate the understanding of the present invention and are not to be construed as limiting in any way.
The reference numerals in fig. 1 are: a first textile material layer 1, a first flexible insulating layer 2, a flexible heating layer 3, a second flexible insulating layer 4, a second textile material layer 5, an electrode 6 and a power supply 7.
Example 1:
As shown in fig. 1, the textile material with elastic electric heating function is a laminated structure, which is a first textile material layer 1, a first flexible insulating layer 2, a flexible heating layer 3, a second flexible insulating layer 4, and a second textile material layer 5 from bottom to top. The flexible heating layer 3 is electrically connected to one end of an electrode 6, and the other end of the electrode 6 is connected to a power supply 7.
The flexible heating layer material is liquid metal GaInSn.
The flexible heating layer is electrically connected with one end of the copper electrode, and the other end of the copper electrode is connected with a voltage source.
The first textile material layer 1 is an elastic cotton cloth with a thickness of 0.25-1.0mm, in this example 0.5mm.
The first textile material layer 5 is an elastic cotton cloth with a thickness of 0.25-1.0mm, in this example 0.5mm.
The first flexible insulating layer 2 is composed of polydimethylsiloxane and has a thickness of 0.05-0.50mm, in this example 0.10mm.
The second flexible insulating layer 4 is composed of polydimethylsiloxane and has a thickness of 0.05-0.50mm, in this example 0.10mm.
The flexible heating layer 3 is composed of liquid metal and has a thickness of 0.10mm.
As shown in fig. 2, the preparation method of the textile material with elastic electric heating function comprises a treatment process a on the surface of a first textile material layer and a treatment process B on the surface of a second textile material layer, which are specifically as follows;
process a:
(1) Cutting the first textile material to a desired size and specification; then, a layer of first flexible insulating layer film is paved on the surface of the first textile material, hot pressing is carried out by a hot press, the hot pressing temperature is 150 ℃, the hot pressing time is 30s, and the first flexible insulating layer film is attached to the surface of the first textile material;
(2) Weighing three metals Ga, in and Sn according to a specific proportion, placing the three metals In a beaker, slowly heating to 200 ℃ and stirring to obtain a uniform and stable liquid metal alloy solution; placing a hollowed template on the surface of the polydimethylsiloxane film, filling a liquid metal alloy solution into the template, and removing the template to obtain a flexible heating layer in a wavy pattern;
(3) And (3) attaching thin copper sheet electrodes to the two ends of the flexible heating layer prepared in the step (2), and coating adhesive colloid to bond liquid metal and copper sheets in order to ensure good contact of mechanical properties.
Process B:
Cutting the second textile material to a desired size and specification; and then spreading a layer of polydimethylsiloxane film on the surface of the second textile material, hot-pressing by using a hot press at the hot-pressing temperature of 150 ℃ for 30 seconds, and attaching the polydimethylsiloxane film to the surface of the first textile material.
And then, connecting the composite layer A obtained after the treatment of the process A with the composite layer B obtained after the treatment of the process B for hot-press bonding, so that the second flexible insulating layer is bonded on the surface of the flexible heating layer.
The common voltage source with the voltage of 5V and the power of 12W is selected, a control switch of the voltage source is turned on, the flexible heating layer is electrified, the liquid metal heats, and the temperature of the textile material prepared by heat conduction is increased. Under the condition of power on, the textile material is stretched, the temperature of the textile material in the stretched state is tested, and the test temperature shows that when the stretching strain reaches 50%, the heating temperature of the textile material is still stable, as shown in fig. 3.
Example 2:
In this embodiment, the structure of the textile material with elastic electrical heating function is basically the same as that of embodiment 1, except that the flexible heating layer material is graphene-doped liquid metal GaInSn.
In this embodiment, the preparation method of the textile material with the elastic electric heating function is basically the same as that of embodiment 1, except that in the process a, graphene is heated in the preparation process of the liquid metal alloy solution, so as to obtain a uniform and stable graphene-doped liquid metal alloy solution, and the graphene-doped liquid metal alloy solution is filled in the template.
In the embodiment, a common voltage source with the voltage of 5V and the power of 12W is selected, a control switch of the voltage source is turned on, the flexible heating layer is electrified, the liquid metal heats, and the temperature of the textile material prepared by heat conduction is increased. Furthermore, the textile material in this embodiment also has a far infrared heating function.
Under the condition of power-on, the textile material is stretched, the temperature of the textile material in the stretched state is tested, and the test temperature shows that the heating temperature of the textile material is basically kept stable when the tensile strain reaches 50%.
Example 3:
in this example, the structure of the textile material with elastic electrical heating function was substantially the same as that of example 1, except that the first flexible insulating layer was graphene-doped polydimethylsiloxane with a thickness of 0.20mm.
In this example, the preparation method of the textile material with elastic electrical heating function is basically the same as that of example 1, except that in the process a, the first flexible insulating layer material is graphene-doped polydimethylsiloxane, and the thickness is 0.20mm.
In the embodiment, a common voltage source with the voltage of 5V and the power of 12W is selected, a control switch of the voltage source is turned on, the flexible heating layer is electrified, the liquid metal heats, and the temperature of the textile material prepared by heat conduction is increased. Also, the first flexible insulating layer in this embodiment has a far infrared heating function.
Under the condition of power-on, the textile material is stretched, the temperature of the textile material in the stretched state is tested, and the test temperature shows that the heating temperature of the textile material is basically kept stable when the tensile strain reaches 50%.
Example 4:
In this embodiment, the structure of the textile material having the elastic electric heating function is basically the same as that of embodiment 1, except that a first heat conductive material layer is provided between the first textile material layer and the first flexible insulating layer to improve the heat transfer effect. The first heat conducting material is liquid metal GaInSn, and the thickness is controlled to be 0.2-0.3 mm.
In this example, the preparation method of the textile material with elastic electric heating function is basically the same as that of example 1, except that: step (1) in process a is as follows:
(1) Cutting the first textile material to a desired size and specification; a layer of liquid metal GaInSn is paved on the surface of a first textile material, then a first flexible insulating layer film is paved on the surface of the liquid metal, hot pressing is carried out by a hot press, the hot pressing temperature is 150 ℃, the hot pressing time is 30s, and the first flexible insulating layer film is attached to the surface of the first textile material;
In the embodiment, a common voltage source with the voltage of 5V and the power of 12W is selected, a control switch of the voltage source is turned on, the flexible heating layer is electrified, the liquid metal heats, and the temperature of the textile material prepared by heat conduction is increased. Under the condition of power-on, the textile material is stretched, the temperature of the textile material in the stretched state is tested, and the test temperature shows that the heating temperature of the textile material is basically kept stable when the tensile strain reaches 50%.
Example 5:
in this example, the structure of the textile material having the elastic electric heating function was substantially the same as that of example 1, except that the thickness of the flexible heating layer was 0.05 mm.
While the foregoing embodiments have been described in detail in connection with the embodiments of the invention, it should be understood that the foregoing embodiments are merely illustrative of the invention and are not intended to limit the invention, and any modifications, additions, substitutions and the like made within the principles of the invention are intended to be included within the scope of the invention.

Claims (23)

1. A preparation method of a textile material with a flexible electric heating function is characterized by comprising the following steps: the flexible heating device is in a laminated structure and sequentially comprises a first textile material layer, a first flexible insulating layer, a flexible heating layer, a second flexible insulating layer and a second textile material layer from bottom to top; the flexible heating layer is made of liquid metal, and the thickness of the flexible heating layer is smaller than 500um;
The flexible heating layer is electrically connected with one end of the electrode, and the other end of the electrode is connected with a power supply;
the preparation method comprises a treatment process A on the surface of a first textile material layer and a treatment process B on the surface of a second textile material layer;
process a: preparing a first flexible insulating layer on the surface of the first textile material layer;
A hollow template is adopted, the template is placed on the surface of the first flexible insulating layer, so that liquid metal is filled in the hollow of the template to obtain a liquid metal layer, then the template is removed, and a flexible heating layer is prepared on the surface of the first flexible insulating layer; electrically connecting the liquid metal in the flexible heating layer with one end of an electrode to obtain a composite layer A;
process B: preparing a second flexible insulating layer on the surface of the second textile material layer to obtain a composite layer B;
And then, connecting the composite layer A and the composite layer B by adopting a hot-press bonding method, so that the second flexible insulating layer is positioned on the surface of the flexible heating layer.
2. The method of preparing as claimed in claim 1, wherein: the thickness of the flexible heating layer is less than 100um.
3. The method of preparing as claimed in claim 2, wherein: the thickness of the flexible heating layer is less than 10um.
4. The method of preparing as claimed in claim 1, wherein: the liquid metal is in a certain pattern structure on the surface of the first flexible insulating layer.
5. The method of preparing as claimed in claim 1, wherein: the first textile material layer has elasticity.
6. The method of preparing as claimed in claim 1, wherein: the first textile material layer has a thickness of 0.25-1.0mm.
7. The method of preparing as claimed in claim 1, wherein: the second textile material layer has elasticity.
8. The method of preparing as claimed in claim 1, wherein: the thickness of the second textile material layer is 0.25-1.0mm.
9. The method of preparing as claimed in claim 1, wherein: the first flexible insulating layer material has elasticity.
10. The method of preparing as claimed in claim 1, wherein: the thickness of the first flexible insulating layer is 0.05-0.50mm.
11. The method of preparing as claimed in claim 1, wherein: the second flexible insulating layer material has elasticity.
12. The method of preparing as claimed in claim 1, wherein: the thickness of the second flexible insulating layer is 0.05-0.50mm.
13. The method of preparing as claimed in claim 1, wherein: the first flexible insulating layer material is doped with a carbon-based material.
14. The method of preparing as claimed in claim 1, wherein: the second flexible insulating layer material is doped with a carbon-based material.
15. The method of preparing as claimed in claim 1, wherein: a first heat conducting layer is arranged between the first textile material layer and the first flexible insulating layer.
16. The method of preparing as claimed in claim 15, wherein: the first thermally conductive layer material comprises a liquid metal.
17. The method of preparing as claimed in claim 1, wherein: a second heat conducting layer is arranged between the second textile material layer and the second flexible insulating layer.
18. The method of preparing as claimed in claim 17, wherein: the second thermally conductive layer material comprises a liquid metal.
19. The method of preparing as claimed in claim 1, wherein: the liquid metal is doped with magnetic particles.
20. The method for preparing the textile material with the flexible electric heating function according to claim 1, wherein the method comprises the following steps: in the process A, a first flexible insulating layer is prepared on the surface of the first textile material layer by adopting a hot pressing method.
21. The method for preparing the textile material with the flexible electric heating function according to claim 1, wherein the method comprises the following steps: in the process B, a second flexible insulating layer is prepared on the surface of the second textile material layer by adopting a hot pressing method.
22. A smart garment comprising a textile material with flexible electrical heating function produced by the production method of any one of claims 1 to 21.
23. A heating device comprising the textile material having a flexible electric heating function produced by the production method according to any one of claims 1 to 21.
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CN112055431B (en) * 2020-09-14 2021-06-29 嘉兴丹亭新材料有限公司 Silica gel cold-bonding process and silica gel heating sheet prepared by same
CN112188657A (en) * 2020-09-23 2021-01-05 江西复萍科技有限公司 Elastic heating cloth and preparation method thereof
CN112172284A (en) * 2020-09-23 2021-01-05 江西复萍科技有限公司 Elastic heating cloth and preparation method thereof
CN114496447B (en) * 2020-10-26 2023-05-05 北京梦之墨科技有限公司 Flexible radio frequency coil and preparation method thereof
CN113766682A (en) * 2021-08-30 2021-12-07 兰州大学 Wearable heater and preparation method thereof

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