KR102194580B1 - aerogel insulator and functional composite materials using the same - Google Patents

Abstract

Disclosed are an insulator which comprises: an aerogel blanket formed by including aerogel in a fabric parent material; a sewing thread which forms a large number of sections by generally quilting the aerogel blanket; and a cover layer penetrating a surface of the aerogel blanket for a certain thickness by wrapping around the surface of the aerogel blanket and functional composite materials formed by installing a surface heat-generating body layer on one surface of the aerogel blanket in the insulator. According to the present invention, in manufacturing an insulator or functional composite materials using the same, the division is conducted by using a sewing thread, and it is easy to keep the distribution uniformity of aerogel particles, to bend or fold the fabric for the insulator and process the fabric thanks to the thin sewed parts, and to maintain the temperature of a proper range by providing heat evenly into an internal space insulating in a product made by using the functional composite materials having a surface heat-generating body.

Description

Aerogel insulator and functional composite materials using the same}

The present invention relates to a thermal insulation material and a functional composite material that is provided with other functional elements along with it, and more particularly, an airgel insulation material and a heating element as a functional element together with it are provided to increase thermal efficiency while providing heat to the object and keeping warm together. It relates to a functional composite.

In order to save limited resources, energy efficiency has become a problem in the industry as a whole, and insulating materials are often used as one method to increase energy efficiency. Therefore, a large number of materials and material structures and manufacturing methods constituting the insulating material have been researched and developed.

Among the thermal insulation materials, a high-efficiency insulation material that can be applied to various uses by increasing workability and reducing weight and volume is called an ultra-insulating material, and many researches and developments have been made recently. Such an ultra-insulating material can be processed with other materials to form a fusion material to form a functional product that can impart appropriate functions.

The advantage of the ultra-insulating fusion composite material is that it can have a function to cope with extreme temperature conditions and environments with its ultra-insulating properties and characteristics of the material. For example, fusion materials that can withstand high temperatures are social and public sectors such as firefighting, flame retardant and thermal insulation fields of the defense industry, environmentally friendly insulation and heat dissipation fields, curtains in the fields of construction and agricultural facilities, steelmaking, smelting, and shipbuilding in the industrial fields. It can be used in various ways, such as insulation materials for automobiles and offshore plants.

In recent years, the production and application of ultra-insulating materials that can have excellent insulation effects even with thin thickness among insulation materials related to outdoor, functional clothing, and functional industrial materials are becoming more interesting. As such materials, such as airgel It is getting a lot of attention.

Aerogel is an ultra-porous material having a porosity of about 20-50 nm with a porosity of 95% or more, and a nanostructured gel containing a large amount of solvent is made by reacting the raw material with a sol-gel. , Supercritical drying is made so that the original gel nanostructure is maintained by removing the solvent almost without shrinkage.

The extremely low thermal conductivity of the airgel is due to the effect of having a high porosity and a unique nanopore structure that blocks the movement of air molecules that may occur in the gas.

These aerogels are generally a kind of porous silicon particle, and have excellent thermal insulation effect due to their large porosity, but very small particles are scattered and blown out in the work space, and are often escaping from the insulation material to weaken the thermal insulation function. There were many difficulties in making and manufacturing and processing products with this fabric.

In order to prevent the airgel particles from contaminating the work space and making the work difficult, the airgel particles may be wrapped in a cover made of a material through which the airgel particles cannot pass to form a fabric.

However, in this case, it is difficult to maintain an even thickness due to random concentration of particles in the enclosed space or escape from a certain position, and if the fabric is processed by cutting or bending, the cover itself is damaged and the original surrounding contamination, insulation Problems such as loss of function are still prone to occur.

Korean Patent Publication No. 10-2014-0039493, Korean Patent Registration No. 10-1912011, etc. disclose a method of making an insulation fabric to solve or alleviate this problem. In these documents, as shown in Figs. 1 and 2, the airgel layer is divided into small divisions in the entire area of the fabric and is limited therein, and the divisions and divisions are separated by a separation area having a certain width.

However, even with these technologies, the problem of fabric processing still remains, and achieving this configuration itself is often a cost and labor-intensive process. In addition, when using airgel in recent years, it is often used in the form of an airgel blanket that impregnates or overlaps the fiber fabric with airgel. In this case, it may be more difficult to make a fabric having such a partition configuration.

On the other hand, when making fabrics using airgel and using this fabric to form outdoor products or other functional products, the excellent thermal insulation properties of the airgel can increase the heat retention of the product in a low-temperature environment, It is difficult to prevent escaping, and it may be necessary to supply the heat energy itself, even in small amounts.

3 shows a cross-sectional configuration of a functional composite material formed by bonding together a heat insulating material and a heating element supplying heat according to this need.

In addition, if such heat supply is limited to a specific area, the portion may cause discomfort or damage to the object to be kept warm, such as the functional product itself or functional clothing user due to overheating, and other portions may not be supplied with sufficient heat, resulting in low temperature. It may cause discomfort or damage.

In addition, in places where heat is concentrated, heat loss to the outside is concentrated due to a large temperature difference in this area despite blocking of the insulation material, increasing the likelihood that the overall insulation and insulation efficiency may decrease.

In order to avoid this problem, it may be requested to transfer heat relatively evenly throughout functional products such as thermal insulation articles.

Korean Patent Publication No. 10-2013-0001469 Korean Patent Publication No. 10-2014-0039493 Korean Patent Registration No. 10-1912011 Korean Patent Registration No. 10-1912455

An object of the present invention is to provide an airgel insulation material capable of solving or alleviating the above-described problems and a functional composite material using the same.

The present invention is an airgel having a configuration that can alleviate the problem of deteriorating the insulation function by escaping from the insulation and contaminating the surrounding by scattering airgel particles in the work space when manufacturing and processing the insulation material in the case of using an airgel blanket for insulation. It is an object of the present invention to provide a thermal insulation material and a functional composite material using the same.

It is an object of the present invention to provide an airgel insulation material having a configuration that makes it easy to maintain uniformity of distribution of airgel particles in the insulation material, and also makes it relatively easy to process the fabric by bending or folding it, and a functional composite material using the same. do.

In the present invention, when the airgel blanket substrate is composed of cotton-type insulation, the constituting substrate insulation is bent, folded, or when washing, the airgel formed on the airgel blanket is not lumped or deformed even under external pressure during washing. An object of the present invention is to provide an airgel insulation material without bias and a functional composite material using the same.

According to an additional aspect of the present invention, even when exposed to a low temperature environment for a relatively long period of time, heat insulation made of a thermal insulation material, a functional product keeps warm, and an airgel insulation material having a configuration that allows heat to be evenly provided to the insulated inner space to easily maintain the temperature. And a functional composite material using the same.

The heat insulating material of the present invention for achieving the above object is an airgel blanket including an airgel in various fiber substrates, and a quilting yarn, aerogel, which is generally quilted to form a large number of compartments so as to resist deformation or agglomeration of the airgel blanket. It is characterized in that it surrounds the surface of the blanket and includes a cover layer on the surface of the airgel blanket.

In the present invention, as the base fiber, in addition to the conventional woven or nonwoven fabric, in particular, cotton-type insulation may be used.

In the present invention, the cover layer may be formed in the form of penetrating a portion of the thickness on the surface of the airgel blanket, and for this purpose, a method of applying a liquid synthetic resin to the surface to partially penetrate it may be used, and a nonwoven fabric or a thin fabric thereon It is also possible to form by further combining the fabric.

In the heat insulating material of the present invention, the cover layer made of synthetic resin may be made of a material that withstands high or low temperatures. For example, the synthetic resin cover layer is formed of polyimide, and a separate sheet or film layer (skin layer) of another material forming the surface of the polyolefin-based separate synthetic resin layer or other insulating material is further provided on the polyimide cover layer to make the surface better. Can be protected.

In the present invention, the heat insulating material may be formed by further providing a planar heating element layer on at least one surface above the cover layer.

In the present invention, the quilting thread is to be quilted by limiting only the airgel blanket, and a cover layer and a separate outer skin layer may be provided above it, and other synthetic resin sheets, films, fabrics, etc. which are quilted or form a separate outer skin layer with the cover layer provided. It is possible to make the quilting in the covered state so that the sewing thread for quilting is exposed on the surface.

For example, a cover layer is added to sew quilting, and the cover layer can be a non-woven fabric of various materials, such as a general material or an aramid material that withstands high temperatures, a fabric, or a hot melt for bonding, and a resin in solution is applied to the airgel blanket. Thus, an epidermal layer may be formed. A separate outer layer is formed on top of it to prevent dust from separating between the quilting threads.The outer layer can be composed of films, fabrics, nonwovens, metal foils, etc. of various shapes and materials, and the outer layer can also be formed by applying a resin in a solution state. have.

In the present invention, the sewing thread can be formed of various materials such as nylon yarn, high temperature aramid, metal yarn, carbon yarn, PTFE yarn, etc., and liquid polyimide (polyimide through subsequent hardening treatment or drying treatment) It is a concept including the whole liquid material to be formed) by impregnating and using a synthetic resin such as) so that the insulating material is subsequently made of a synthetic resin layer solidified on the surface of the quilted yarn in a quilted fabric state, and this synthetic resin layer is placed at the sewing site. It can also be used to fill in microscopic gaps.

In the present invention, for example, in the case of forming a synthetic resin cover layer of polyimide, a method in which liquid polyimide is applied to the airgel blanket and partially penetrates from the surface of the airgel blanket to the inside before forming the solid polyimide layer. Alternatively, it may be formed by laminating a plastic polyimide sheet on the surface of the airgel blanket and heating it to allow penetration.

In the present invention, a planar heating element of various conventional alternating current (AC) or direct current (DC) may be adopted.

According to the present invention, in the case of using an airgel blanket for manufacturing an insulating material or a functional composite material having the same, airgel particles scatter in the work space during manufacturing and subsequent processing, contaminating the surroundings, and leaving the insulating material to weaken the insulating function. Can be reduced.

According to the present invention, it is easy to maintain the uniformity of distribution of airgel particles in the overall aspect in the manufacture of an insulation material or a functional composite material having the same, and it is relatively easy to process the insulation fabric by bending or folding afterwards because the stitched part is formed thin. This facilitates, and it is possible to reduce the cost and labor of manufacturing products using these fabrics.

In particular, in the case of a cotton-type insulation in which the substrate constituting the airgel blanket is widely formed, the aerogel formed on the airgel blanket does not stick or deflect even under external pressure during bending, folding, or washing. The durability can be reinforced by preventing it.

According to an additional aspect of the present invention, even when exposed to a low temperature environment for a relatively long period of time, by using the insulation fabric and the planar heating element evenly distributed on the fabric, the functional product evenly provides heat to the inner space to keep and insulate the temperature within a suitable range. Can be easily maintained.

1 is a side cross-sectional view showing an example of a fabric of a heat insulating material provided with a conventional planar heating element,
FIG. 2 is a plan view of an insulation fabric showing a conventional example in which an airgel forms a partition and the partition and the partition are divided into regions having a width;
Figure 3 is a side cross-sectional view of an insulating material fabric showing another example of the related art in which a pack wrapped with airgel is distributed on a plane, and the covering covers are divided into compartments including the pack, and a region for separation exists between them. ,
4 is a plan view of an embodiment according to the present invention,
5 is a side cross-sectional view of an embodiment according to the present invention;
6 is a side cross-sectional view of another embodiment of the present invention;
FIG. 7 is a side cross-sectional view of a quilting thread in the embodiment of FIG. 6 at another location penetrating through the airgel blanket and polyimide cover layer;
Figure 8 is a side cross-sectional view of another embodiment of the present invention;
9 is a perspective view showing an example of a planar heating element layer configuration according to another embodiment of the present invention.

Hereinafter, the present invention will be described in more detail through specific examples with reference to the drawings.

4 and 5 are side cross-sectional views partially showing a plan view of an embodiment according to the present invention and a sectional view taken along line AA′ of the plan view.

Here, quilting is performed with quilting threads or sewing threads 140 and 145 at regular intervals in two directions perpendicular to each other with respect to the airgel blanket 110 having the fiber substrate 111 impregnated with the airgel particles 113. Thus, a plurality of square compartments are formed like a grid pattern, and in this state, a cover layer 130 is formed by applying polyimide or a liquid plastic or curable resin through polyimide surface treatment to form a basic insulating material.

In FIG. 4, only some strands of the sewing thread in the vertical and horizontal directions are shown, but it goes without saying that the sewing threads are evenly distributed over the entire area of the insulating material.

At this time, the airgel blanket 110 passes the fibrous substrate 111 through the process bath in which the airgel particles are formed including the airgel raw material, and the state in which the airgel particles 113 are included through subsequent processes such as drying or curing. It can be achieved, as it is or, if necessary, in a manner such as overlapping the fibrous substrate 111 by a required thickness. In the case of insulation in the form of a cotton fiber, a number of fibers constituting the cotton are usually overlapped vertically and somewhat irregularly, and these fibers may be considered to be substituted instead of the plurality of fiber bases in the drawing, so it is not necessary to use overlapping. No, it can be formed to the required thickness from the beginning.

The quilting sewing operation for the airgel blanket 110 may be performed in the same manner as when making a garment fabric having a conventional quilting sewing. However, at this time, in order to prevent the sufficiently dried powdery airgel particles from detaching from the blanket during the sewing process and contaminating the surrounding work environment, proceed before complete drying of the airgel blanket or dry airgel blanket It may be made after treatment such as non-woven fabric, thin fiber base material, and material spraying to suppress the separation of airgel particles on the surface.

The portion where the sewing thread 140 passes is the airgel blanket 110 formed by overlapping the fiber base 111 impregnated with airgel is compressed by the sewing thread 140 to form a thin thickness, and the portion between the airgel impregnated overlapped Since no special pressure is applied to the fibrous substrate, repulsive force acts between the fibers due to the elasticity of the fibers constituting the substrate, so that it has a state similar to that of a somewhat convex quilted blanket.

In this state, a cover layer coated with liquid polyimide or resin on the sewing thread 140 and the airgel blanket 110, or a cover layer 130 to which a non-woven fabric or a thin fabric is further added to cover the entire surface. I can. For example, in the case of forming a polyimide cover layer, a polyamic acid solution with a viscosity adjusted to 5,000 to 20,000 cps is applied to the surface of the airgel blanket, and heat is applied to make the temperature between 100 and 400 degrees C. The polyimide cover layer in a solid state can be formed by imidation.

In this state, the polyimide or resin cloth cover layer 130 has a three-dimensional and very wide contact area with the airgel blanket 110 through partial impregnation, so that it can maintain this state with sufficient bonding force. In addition, while the appearance of the fabric shape is maintained, the airgel particles 113 leak out from the airgel blanket 110 in the cover layer 130 or the cover layer to which the nonwoven fabric or thin fabric is added. It functions to shield it so that it is not.

Therefore, dust is blown out of the airgel insulation material or product manufacturing process using the same.

In addition, even if a lot of wrinkles occur when a product containing an airgel insulation material is used or when washing, the polyimide cover layer is separated from the airgel blanket or airgel particles are reduced to the outside, resulting in high initial insulation performance. So that it can be maintained.

In this state, when forming the insulating material fabric, processing to further combine the outer skin layer 150 forming the fabric surface may be performed.

6 is a side cross-sectional view of another embodiment of the present invention.

Here, a polyimide cover layer 130 is formed by applying and curing or drying liquid polyimide on the surface of the airgel blanket 110 formed by overlapping the fibrous substrate 111 impregnated with the airgel particles 113, In that state, quilting is performed at regular intervals in the two axial directions perpendicular to each other to form a surface grid pattern insulation fabric similar to that of FIG. 4 in which a plurality of rectangular sections are formed.

In this process, except for the order in which each process step is performed, each of the formation of the airgel blanket 110, the formation of the polyimide cover layer 130, and the quilting stitching may be performed in a manner similar to the previous embodiment.

However, in this embodiment, a sewing thread 140" that has been properly wiped from the surface of the thread so that the liquid polyimide is impregnated with the liquid polyimide is not cured or dried and the liquid polyimide on the surface does not flow. When the quilting treatment is performed and curing or drying is performed, the bonding force with the polyimide cover layer 130 is strengthened while the sewing for the quilting treatment is performed without much difficulty, and the same as shown in the cross-sectional view of FIG. 7 In the same way, at a position where the sewing thread 140" penetrates the polyimide cover layer 130, the polyimide impregnated into the thread seals the through hole to prevent leakage of fine airgel particles through the gap. . Of course, this configuration may not be formed in consideration of the formation of the outer skin layer after sewing.

The insulating material formed in this way has an overall appearance similar to that described in the previous embodiment as shown in FIG. 4, and the overlapped fabric and the cover layer are pressed by the sewing thread in the part where the sewing thread passes, and the part between the overlapped fabric impregnated with airgel It has a somewhat convex state.

In this state, a separate outer skin layer 150 constituting the surface of the insulation fabric may be further laminated on the cover layer 130 or the nonwoven fabric or the cover layer to which the thin fabric fabric is further added. The outer skin layer 150 may be made of a polyolefin-based synthetic resin layer or a sheet, film, or cloth made of another material, and may be made of a corresponding functional material for making a functional product.

At this time, a separate adhesive or adhesive is used for bonding of the cover layer 130 or non-woven fabric with polyimide or resin fabric, and the cover layer and the outer skin layer 150 to which a thin fabric is added, or a heat-sealing method, etc. It is also possible to use, and it is also possible to form the outer skin layer itself by applying a liquid substance, rolling, or curing (curing). Further, the outer skin layer may be formed of a plurality of layers.

8 is a side cross-sectional view of another embodiment of the present invention.

Here, a polyimide or resin cloth cover layer 130 by coating and curing or drying a liquid polyimide on the surface of the airgel blanket 110 formed by overlapping the fibrous substrate 111 containing the airgel particles 113 Or a nonwoven fabric, or a cover layer to which a thin fabric is further added, and a planar heating element layer 160 is formed on one side thereof, and a separate outer skin layer 150 or a surface cover layer is formed as a whole in that state.

In this state, quilting is sewn at regular intervals in the two axial directions perpendicular to each other to form a grid-patterned insulation fabric in which a plurality of square divisions are formed.

Depending on the embodiment, a surface heating element layer 160 is formed on the cover layer to which the polyimide or resin cloth cover layer 130 or the non-woven fabric, or the thin fabric is further added, and a quilting treatment is performed on the It is also possible to form the outer skin layer 150 made of a synthetic resin film or cloth, but in this case, since the outer skin layer 150 is already joined in a convex state by quilting stitching treatment, it may be difficult to combine without peeling off. .

Since the polyimide cover layer 130 itself is a material that is very resistant to heat, there is no problem of thermal damage unless the temperature by the heat generated through the planar heater layer 160 is very high, and the outer skin layer 150 is also a planar heater layer 160 It is desirable to form a material that is resistant to heat so that there is no heat damage caused by ).

When the outer skin layer 150 is a material that is weak to heat, it is preferable to laminate and form a material that is resistant to heat between them, and the gap between the hole in each layer and the sewing thread 140 formed by quilting stitching is used as the airgel of the airgel blanket. When fine particles pass through and process the fabric, contamination of the work environment and deterioration of the thermal insulation function as in the prior art may occur, so it is preferable to employ a material and an outer layer bonding method capable of preventing the passage of airgel particles when forming the outer layer.

Here, the planar heating element layer is laminated with an airgel insulation material made of an airgel blanket to form a heat-generating and thermal insulation functional composite. In this case, the heat generated from the planar heating element does not flow well toward the airgel blanket. Therefore, if the planar heating element is placed on the inside of the composite material and the airgel blanket is made to face the outside and power is supplied to the planar heating element, the heat insulator can prevent the external leakage of heat as efficiently as possible, thereby reducing the internal temperature by generating a small amount of heat. You can keep it constant for a long time.

Meanwhile, in this embodiment, the planar heating element may be formed in various forms.

A planar heating element may be formed by widely forming a phase change material having a large latent heat or a material having a large heat capacity as a heat storage material, but in this case, it may be easy to have a limit on the amount of heat or inconvenience in use due to processing due to the thickness.

Therefore, it is preferable that the main planar heating element is provided with a separate power source and is formed using an electric heating element that generates heat when current is passed from the power source.

Such a planar heating element, for example, consists of a conductive layer with a certain degree of resistance for heat generation, and an electrode is connected to one side and the other side so that heat flows through the conductive layer to generate heat, and it is damaged when the conductive layer is formed. In order to prevent this, only the terminal part can be treated separately and safely exposed using a rigid conductive member such as a lead wire, and the remaining part can be made in a form in which both sides of the conductive layer are covered with separate insulator synthetic resin.

The resistive conductive layer may be made of a very thin metal film, or may be formed by applying and drying a viscous liquid having conductive particles or conductive fibers such as metal paste or carbon nanotubes in various ways such as a printing method. In the case of using printing, in addition to the entire surface coating, a method of forming a conductive pattern covering an area with a uniform distribution density may be used.

In addition, instead of a conductive film made of a printed conductive pattern, a linear conductor that can generate heat due to resistance is placed and fixed on the non-conducting film so that it passes evenly over the entire area, and the terminals are treated to expose both ends to connect to the power source. It is also possible to form a planar heating element in the form of covering another non-conductor film.

In the case of using a separate sewing thread above and below the fabric when using the sewing thread for quilting in the previous embodiment, the sewing thread evenly distributed on the fabric can be formed by forming a conductive resistor. The configuration can also be made. In this case, the conductive yarn may be made of a conductive resistor, or may be made by coating or impregnating the fiber with a conductive material.

On the other hand, when forming a composite material in the form of a fabric that combines the surface heating element layer with an insulation material, limiting the part that will form an electrical terminal to two does not make a product using the entire composite fabric, but cutting, molding and processing it, electricity. It is difficult to ensure that the terminals remain usable.

Therefore, even after such cutting and processing, the electrical terminals are distributed in various places on the fabric in order to exhibit the heat-generating function well in the product, and the fabric can be used to find and select available electrical terminals in the state of the product through processing such as cutting. In the state, it is preferable to distribute the electrical terminals in a number of places. In this case, it can be used after selecting a suitable terminal for use among the electrical terminals exposed after commercialization processing, and connecting the lead wire to this terminal to make it in a convenient form for power connection.

On the other hand, when using in a product, it is necessary to use a sensor to maintain the temperature in a certain range by using a planar heating element. In the case of using a PCT heater in which at least part of the conductor of the planar heating element is made of a PTC (positive temperature coefficient) material, PTC Due to the property of the heater itself, it is possible to intelligently maintain the temperature in the specified temperature range without a separate sensor.

9 is a perspective view showing an example of the configuration of the planar heating element layer in the same embodiment as in FIG. 8. As shown, the planar heating element layer 200b includes a heat-resistant substrate 210b as a non-conductor, a carbon nanotube coating layer 220b as a resistive conductor, and a pair of electrode plate terminals 230b formed on a part of the resistive conductor. , A copper lead wire 240b, and an insulating coating layer 250b.

For example, the heat-resistant substrate 210b forms a skeleton on which the coating layer 200b is to be formed. Heat-resistant substrate (210b) can be selectively used any one of polyether telephthalate (PET), polyethylene nitrate (PEN), and amide film for low temperature heat generation at 40°C to 100°C. I can. It is preferable that the surface of the heat-resistant substrate 210b has a large amount of fine pores so that nano-sized carbon nanotube particles can be easily located.

The heat-resistant substrate 210b is preferably processed to make a product or can be freely bent or bent for convenience when used in a product state, and by mixing an emulsifier in the manufacturing step of PET, PEN, and amide film, it is easily It can be made to have the property to bend or bend.

The carbon nanotube coating layer 220b may be formed by spraying a carbon nanotube dispersion on the lower surface of the heat-resistant substrate 210b. At this time, the carbon nanotube coating layer 220b may be coated with a mass of 4g/m2 to 10g/m2 per unit area. When forming the heating conductive layer, not only carbon nanotubes (CNTs), but also thin-film coating film structures such as graphene or fulleran may be used.

Carbon nanotubes have excellent exothermic properties, and hexagonal shapes made of six carbons are connected to each other to form a tube shape, and the diameter of the tube is only several to tens of nanometers. In general, the particle structure of carbon fibers breaks the connection even if only 1% is deformed, whereas carbon nanotubes can withstand 15% deformation.

The pair of electrode plate terminals 230b are electrically connected to the carbon nanotube coating layer 220b with a predetermined separation distance. The electrode plate terminal 230b heats the carbon nanotube coating layer 220b by applying power to the carbon nanotube coating layer 220b.

The copper lead wires 240a are disposed under the pair of electrode plate terminals 230b, respectively, and serve as connection terminals for connecting the electrode plate terminals 230b with power.

The insulating coating layer 250b is formed on the lower surface of the carbon nanotube coating layer 220b. Since the insulating coating layer 250b is formed, the electrode plate terminal 230b and the copper lead wire 240b may be disposed between the insulating coating layer 250b and the carbon nanotube coating layer 220b.

As a material of the insulating coating layer 250b, an organic or inorganic material having heat resistance equal to or higher than that of the heat-resistant substrate 210b may be used, and preferably a ceramic adhesive may be used. Since the electrode plate terminal 230b and the carbon nanotube coating layer 220b are electrically insulated by the insulating coating layer 250b, and the carbon nanotube coating layer 220b cannot contact oxygen, the carbon nanotube coating layer 220b Prevent oxidation of

Here, a separate heat-resistant substrate and insulating coating layer are disclosed to cover the carbon nanotube coating layer, which is a resistive conductor, up and down in order to construct the planar heating element layer.However, when forming the composite material, the thickness and bendability of the composite material, ease of cutting, etc. Considering that, the polyimide cover layer 130 of FIG. 8 replaces the heat-resistant substrate, the outer skin layer 150 replaces the insulating coating layer, and the planar heating element layer 160 may consist of only a carbon nanotube coating layer.

The planar heating element layer may be formed by employing a transparent heating element (eg, graphene, transparent carbon nanotube coating, etc.) or a mesh-type planar heating element capable of transmitting light due to high transparency. For example, when forming an insulating material such as an airgel blanket, if the thickness or distribution is partially transparent so that light can pass through, and the planar heating element layer is also formed as transparent or translucent, the functional composite material including the insulating layer and the heating layer is Can be made of transparent and translucent, and such a composite material can be used as a thermal insulation curtain for a green house or greenhouse.

The planar heating element of the composite material of the present invention assumes high thermal insulation properties of the heat insulator, and it is assumed that a small amount of current flows in general, and has thermal protective properties using a small amount of current flowing throughout the planar heating element. It can be used for products with lighter weight and high energy efficiency in everyday or industrial products (eg, portable equipment, mobile equipment, construction, plants, etc.) as it can maximize its insulation function.

When the composite material to which the present invention is applied is used for manufacturing various products, it is possible to produce a variety of products that need to maintain a higher temperature than the surroundings with minimal heat supply based on the light weight and high insulation efficiency of the airgel. It is possible to form a new product market in the market and increase the market size by increasing the efficiency of existing products.

For example, the composite material of the present invention has a combination of insulation and heating, and thus various functional clothing, bedding, functional special packaging materials, thermal insulation materials such as thermal insulation packs, and vinyls that need to increase the efficiency of heating by simultaneously using such insulation and heating. It can be used as a constituent material for a wide variety of industrial products and household goods, such as a detachable thermal insulation curtain heating material of a house, and can be especially used with an advantage in a product field requiring light weight mobility.

Although described above with reference to the illustrated embodiment for the present invention, this is only exemplary, and various modifications may be made therefrom by those of ordinary skill in the art, and all or part of the above-described embodiments It will be appreciated that may be optionally combined and configured. Therefore, the true technical scope of the present invention should be determined by the technical spirit of the appended claims.

100: insulation 110: airgel blanket
111: fiber substrate 113: airgel particles
130: cover layer 140, 140', 140", 145: sewing thread
150: outer skin layer 160: planar heating element layer

Claims (12)

It has an airgel blanket formed by including airgel particles, a sewing thread used to run the airgel blanket overall, and a cover layer surrounding the surface of the airgel blanket,
The airgel blanket insulator is made of cotton-shaped insulation, and the sewing thread is made to be quilted by limiting only the airgel blanket. The method of claim 1,
Airgel blanket insulation, characterized in that further comprising a separate outer skin layer covering the cover layer. The method of claim 1,
The cover layer is an airgel blanket insulation material, characterized in that formed by penetrating a liquid synthetic resin over a portion of the thickness of the airgel blanket. delete The method of claim 1,
The cover layer is formed by applying a liquid polyimide or synthetic resin to the surface of the airgel blanket or by further bonding a nonwoven fabric or a thin fabric fabric on the layer made of the liquid polyimide or the synthetic resin,
The airgel blanket insulation material, characterized in that the sewing thread is made using a liquid polyimide or synthetic resin impregnated. delete As a functional composite material having the airgel blanket insulation of claim 1,
Functional composite material, characterized in that the surface heating element layer is further provided on the cover layer on one side of the airgel blanket. The method of claim 7,
The planar heating element layer is a functional composite material, characterized in that a resistive conductive layer that generates heat when an electric current flows through the substrate is formed by one of affixing, printing, and coating methods over the entire surface or according to a predetermined pattern. The method of claim 7,
The planar heating element is
A functional composite material, characterized in that it is formed of a thin metal film or formed by applying and drying a viscous liquid having conductive particles or conductive fibers. The method of claim 7,
The planar heating element is a functional composite material, characterized in that it is formed by using a separate sewing thread above and below the airgel blanket as the sewing thread and forming a sewing thread on one side of the sewing thread as a conductive resistor. The method of claim 7,
The planar heating element is a functional composite material, characterized in that formed by distributing two or more electrical terminals in a plurality of locations. The method of claim 7,
The functional composite material, characterized in that the planar heating element is formed by using a PTC heater in which at least part of the PTC (positive temperature coefficient) material is used.

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