Thermal insulation composite material and preparation method and application thereof

Abstract

The invention relates to a heat insulation composite material and a preparation method and application thereof. The heat insulation composite material comprises a ceramic fiber felt material, a vacuum heat insulation plate and an aerogel fiber felt material which are sequentially stacked, and the vacuum heat insulation plate comprises a heat insulation base plate with a vacuum inner cavity and a glass fiber inner core arranged in the vacuum inner cavity. According to the heat insulation composite material, the ceramic fiber felt material can resist the high temperature of 1000 DEG C and can serve as a main heat insulation layer, the vacuum heat insulation plate has the low heat conductivity coefficient and serves as a middle heat insulation layer, and meanwhile the glass fiber inner core is arranged in the vacuum inner cavity of the heat insulation base plate, has the good heat insulation effect and can serve as a vacuum heat insulation safety measure; the problem that the heat insulation performance of the vacuum leakage heat insulation substrate is greatly reduced is prevented; and on the basis, the aerogel fiber felt material is combined, so that heat can be further isolated. Therefore, the heat insulation performance of the heat insulation composite material is improved.

Description

Technical Field

[0001] The present invention relates to the technical field, and in particular to a heat-insulating composite material and a preparation method and application thereof. Background Art

[0002] High-temperature thermal insulation is a common problem in many technical fields. Take automobiles as an example. Many of their components require thermal insulation materials. For example, car batteries need to use thermal insulation materials to prevent thermal runaway.

[0003] At present, most thermal insulation materials use a single thermal insulation material, mainly including ultra-fine glass wool, vacuum insulation panels, microporous nano panels, aerogel felt and other thermal insulation materials. Among them, glass wool has poor temperature resistance and is easy to delaminate. It cannot be used above 550°C and cannot be used at higher temperatures; the interior of the vacuum insulation panel is a vacuum environment. Once the vacuum leaks, the thermal insulation performance will drop significantly; the microporous nano panels have a high density and are not easy to process and shape. Therefore, the thermal insulation performance of current thermal insulation materials needs to be improved. Summary of the invention

[0004] Based on this, it is necessary to provide a thermal insulation composite material with good thermal insulation performance and a preparation method and application thereof.

[0005] In a first aspect of the present application, a thermal insulation composite material is provided, comprising a ceramic fiber felt material, a vacuum insulation panel and an aerogel fiber felt material stacked in sequence, wherein the vacuum insulation panel comprises an insulation substrate having a vacuum inner cavity and a glass fiber inner core arranged in the vacuum inner cavity.

[0006] In the above-mentioned thermal insulation composite material of the present application, the ceramic fiber felt material can withstand high temperature of 1000°C and can be used as the main thermal insulation layer. The vacuum insulation board has a low thermal conductivity as the middle thermal insulation layer. At the same time, a glass fiber inner core is provided in the vacuum inner cavity of the thermal insulation substrate. The glass fiber inner core is a thermal insulation material and also has a good thermal insulation effect. It can be used as a safety measure for vacuum insulation to prevent the thermal insulation performance of the thermal insulation substrate from being greatly reduced due to vacuum leakage. On this basis, the combination of aerogel fiber felt material can further isolate heat. In this way, the thermal insulation performance of the above-mentioned thermal insulation composite material is improved.

[0007] In some embodiments, the ceramic fibers in the ceramic fiber felt material include one or more of zirconium oxide fibers and silicon oxide fibers.

[0008] In some embodiments, the ceramic fiber felt material includes not only the ceramic fibers but also silica gel and starch.

[0009] In some embodiments, in the ceramic fiber felt material, the mass content of the ceramic fiber is 85% to 95%; and / or,

[0010] In the ceramic fiber felt material, the mass content of the silica gel is 3% to 10%; and / or,

[0011] In the ceramic fiber felt material, the mass content of the starch is 2% to 5%.

[0012] In some of the embodiments, the material of the thermal insulation substrate is a metal material or a non-metal material, and the non-metal material includes one or more of polyvinylidene chloride, ethylene-vinyl alcohol copolymer and polyethylene naphthalate.

[0013] In some of the embodiments, in the vacuum insulation panel, the mass content of the glass fiber core is 85% to 95%.

[0014] In some of the embodiments, the aerogel fibers in the aerogel fiber felt include one or more of silica aerogel and polyimide aerogel.

[0015] In some embodiments, the aerogel fiber felt material includes, in addition to the aerogel fibers, silica gel and starch;

[0016] In the aerogel fiber felt material, the mass content of the aerogel fiber is 85% to 90%, the mass content of the silica gel is 8% to 15%, and the mass content of the starch is 2% to 3%.

[0017] In some embodiments, the thickness of the ceramic fiber felt is 20 cm to 30 cm; and / or,

[0018] The thickness of the vacuum insulation panel is 2 cm to 5 cm; and / or,

[0019] The thickness of the aerogel fiber felt material is 10 cm to 20 cm.

[0020] Due to the specific structural setting, the above-mentioned thermal insulation composite material of the present application can achieve good thermal insulation effect on the basis of low overall thickness, which is beneficial to reducing the thickness of the thermal insulation composite material, reducing material costs, and lightweighting the applied products.

[0021] In some embodiments, the thermal insulation composite material further includes a first bonding layer and a second bonding layer, wherein the first bonding layer is disposed between the ceramic fiber felt material and the vacuum insulation panel, and the second bonding layer is disposed between the vacuum insulation panel and the aerogel fiber felt material.

[0022] In some embodiments, the first adhesive layer and the second adhesive layer are aluminum phosphate-based adhesive layers.

[0023] In a second aspect of the present application, a method for preparing a thermal insulation composite material is provided. The thermal insulation composite material is any of the thermal insulation composite materials described above. The preparation method comprises the following steps:

[0024] The ceramic fiber felt material, the vacuum insulation panel and the aerogel fiber felt material are stacked and arranged.

[0025] The preparation method of the present application is simple in process. In the obtained thermal insulation composite material, the ceramic fiber felt material can withstand high temperature of 1000°C and can be used as the main thermal insulation layer. The vacuum insulation board has a low thermal conductivity as the middle thermal insulation layer. At the same time, a glass fiber inner core is provided in the vacuum inner cavity of the thermal insulation substrate. The glass fiber inner core is a thermal insulation material and also has a good thermal insulation effect. It can be used as a safety measure for vacuum insulation to prevent the thermal insulation performance of the thermal insulation substrate from being greatly reduced due to vacuum leakage. On this basis, the combination of aerogel fiber felt can further isolate heat. In this way, the thermal insulation performance of the above thermal insulation composite material is improved.

[0026] In a third aspect, the present application provides use of any of the above-mentioned thermal insulation composite materials in the preparation of products with thermal insulation function.

[0027] In a fourth aspect of the present application, a product with a heat insulation function is provided, comprising a heat source component and any one of the above-mentioned heat insulation composite materials, wherein the heat insulation composite material is arranged adjacent to the heat source component.

[0028] In some embodiments, the thermal insulation composite material is disposed adjacent to the heat source component on a side where the ceramic fiber felt material is located.

[0029] In this way, the ceramic fiber felt material is used as the main insulation layer to insulate most of the heat. The vacuum insulation board has a low thermal conductivity as the middle insulation layer. At the same time, a glass fiber inner core is provided in the vacuum cavity of the insulation substrate. The glass fiber inner core also has a good insulation effect and can be used as a safety measure for vacuum insulation to prevent the problem of a significant decrease in the insulation performance of the insulation substrate due to vacuum leakage. On this basis, the aerogel fiber felt material can be combined to further isolate heat. In this way, the insulation performance of the above-mentioned insulation composite material is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the cross-sectional structure of a thermal insulation composite material according to one embodiment of the present application.

[0031] Description of reference numerals:

[0032] 100. thermal insulation composite material; 110. ceramic fiber felt material; 120. vacuum insulation panel; 121. thermal insulation substrate; 122. glass fiber inner core; 130. aerogel fiber felt material; 140. first bonding layer; 150. second bonding layer. DETAILED DESCRIPTION

[0033] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. It should be understood that the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0035] "Scope" disclosed in the present application can be limited in the form of lower limit and upper limit, and a given range is limited by selecting a lower limit and an upper limit, and the selected lower limit and upper limit define the boundary of a special range. The scope limited in this way can be including end values ​​or excluding end values, and any end value can be included or not included independently, and can be combined arbitrarily, that is, any lower limit can be combined with any upper limit to form a scope. For example, if the scope of 60-120 and 80-110 is listed for a specific parameter, it is understood that the scope of 60-110 and 80-120 is also expected. In addition, if the minimum range values ​​1 and 2 listed, and if the maximum range values ​​3,4 and 5 are also listed, the following scope can all be expected: 1-3, 1-4, 1-5, 2-3, 2-4 and 2-5. In the present application, unless otherwise specified, the numerical range "ab" represents the abbreviation of any real number combination between a and b, wherein a and b are real numbers. For example, the numerical range "0-5" means that all real numbers between "0-5" are listed in this document, and "0-5" is just an abbreviation of these numerical combinations. In addition, when a parameter is expressed as an integer ≥ 2, it is equivalent to disclosing that the parameter is, for example, an integer 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, etc. For example, when a parameter is expressed as an integer selected from "2-10", it is equivalent to listing the integers 2, 3, 4, 5, 6, 7, 8, 9 and 10.

[0036] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0037] See also Figure 1 In a first aspect of the present application, a thermal insulation composite material 100 is provided, comprising a ceramic fiber felt material 110, a vacuum insulation panel 120 and an aerogel fiber felt material 130 stacked in sequence, the vacuum insulation panel 120 comprising an insulation substrate 121 having a vacuum cavity and a glass fiber core 122 arranged in the vacuum cavity.

[0038] In the above-mentioned heat-insulating composite material 100 of the present application, the ceramic fiber felt material 110 can withstand high temperature of 1000°C and can be used as the main heat-insulating layer. The vacuum insulation panel 120 has a low thermal conductivity as the middle heat-insulating layer. At the same time, a glass fiber inner core 122 is provided in the vacuum inner cavity of the heat-insulating substrate 121. The glass fiber inner core 122 is a heat-insulating material and also has a good heat-insulating effect. It can be used as a safety measure for vacuum heat insulation to prevent the problem of a significant decrease in the heat-insulating performance of the heat-insulating substrate 121 due to vacuum leakage. On this basis, the aerogel fiber felt material 130 can be combined to further isolate heat. In this way, the heat-insulating performance of the above-mentioned heat-insulating composite material 100 is improved.

[0039] In addition, the glass fiber inner core 122 in the vacuum inner cavity of the thermal insulation substrate 121 can also support the thermal insulation substrate 121 and improve the structural strength of the thermal insulation composite material 100 .

[0040] Specifically, the heat-resistant temperature of the heat-insulating composite material 100 of the present application is increased to above 1000° C., and a heat-insulating effect of a hot surface temperature of 800° C. and a cold surface temperature reaching room temperature can be achieved on the basis of a relatively thin thickness.

[0041] In addition, the thermal insulation composite material 100 of the present application also has good mechanical properties. The thermal insulation composite material 100 has a layered structure and can also be called a thermal insulation composite mat.

[0042] Furthermore, the ceramic fiber felt material 110 is used as an inner layer close to the heat source component, and the aerogel fiber felt material 130 is used as an outer layer away from the heat source component.

[0043] In some embodiments, the ceramic fibers in the ceramic fiber felt material 110 include, but are not limited to, one or more of zirconium oxide fibers and silicon oxide fibers. Preferably, the ceramic fibers in the ceramic fiber felt material 110 include zirconium oxide fibers.

[0044] The ceramic fiber can be prepared by, but not limited to, a sol-gel method, or can be purchased commercially.

[0045] In some embodiments, the ceramic fiber felt material 110 includes silica gel and starch in addition to ceramic fibers. The ceramic fiber felt material 110 can be purchased commercially or prepared by the following method: ceramic fibers, silica gel and starch are mixed to form a felt slurry; the felt slurry is subjected to vacuum filtration to form a wet embryo, and then the moisture is dried to form the ceramic fiber felt material 110.

[0046] In some of the embodiments, in the ceramic fiber felt material 110, the mass content of the ceramic fiber is 85% to 95%, and as an example it can be 85%, 90%, 95%, or within a range consisting of any two of the above point values ​​as end values, and the same is true below.

[0047] In some of the embodiments, in the ceramic fiber felt material 110, the mass content of silica gel is 3% to 10%, and as examples it can be 3%, 5%, 8%, 10%, or within a range consisting of any two of the above point values ​​as end values.

[0048] In some of the embodiments, in the ceramic fiber felt material 110, the mass content of starch is 2% to 5%, and as examples may be 2%, 3%, 4%, 5%, or within a range consisting of any two of the above point values ​​as end values.

[0049] In some embodiments, the material of the heat insulating substrate 121 is a metal material or a non-metal material. The non-metal material includes one or more of polyvinylidene chloride (PVDC), ethylene-vinyl alcohol copolymer (EVOH), and polyethylene naphthalate (PEN). The metal material includes but is not limited to stainless steel, aluminum, etc.

[0050] In some of the embodiments, in the vacuum insulation panel 120, the mass content of the glass fiber core 122 is 85% to 95%, and as examples may be 85%, 90%, 95%, or a range consisting of any two of the above point values ​​as end values.

[0051] The glass fiber inner core 122 may be distributed in a glass fiber state or in a glass fiber layer state. For example, the glass fiber inner core 122 is a glass fiber cloth.

[0052] In some embodiments, the aerogel fibers in the aerogel fiber felt 130 include one or more of silica aerogel and polyimide aerogel.

[0053] The aerogel fibers can be prepared by a dynamic sol-gel method or purchased commercially.

[0054] In some embodiments, the aerogel fiber felt material 130 includes silica gel and starch in addition to aerogel fibers. The aerogel fiber felt material 130 can be purchased commercially or prepared by the following method: aerogel fibers, silica gel and starch are mixed to form a felt slurry; the felt slurry is subjected to vacuum filtration to form a wet embryo, and then the moisture is dried to form the aerogel fiber felt material 130.

[0055] In some of the embodiments, in the aerogel fiber felt material 130, the mass content of aerogel fiber is 85% to 90%, the mass content of silica gel is 8% to 15%, and the mass content of starch is 2% to 3%. As an example, in the aerogel fiber felt material 130, the mass content of aerogel fiber can be 85%, 88%, 90%, or within the range consisting of any two of the above point values ​​as end values. As an example, in the aerogel fiber felt material 130, the mass content of silica gel can be 8%, 10%, 12%, 15%, or within the range consisting of any two of the above point values ​​as end values. As an example, in the aerogel fiber felt material 130, the mass content of starch can be 2%, 2.5%, 3%, or within the range consisting of any two of the above point values ​​as end values.

[0056] In some of the embodiments, the thickness of the ceramic fiber felt material 110 is 20 cm to 30 cm. For example, it can be 20 cm, 22 cm, 24 cm, 25 cm, 26 cm, 28 cm, 30 cm, or within a range consisting of any two of the above point values ​​as end values.

[0057] In some of the embodiments, the thickness of the vacuum insulation panel 120 is 2 cm to 5 cm. For example, it can be 2 cm, 3 cm, 4 cm, 5 cm, or within a range consisting of any two of the above point values ​​as end values.

[0058] In some of the embodiments, the thickness of the aerogel fiber felt 130 is 10 cm to 20 cm. For example, it can be 10 cm, 12 cm, 14 cm, 15 cm, 16 cm, 18 cm, 20 cm, or within a range consisting of any two of the above point values ​​as end values.

[0059] Due to the specific structural setting, the thermal insulation composite material 100 of the present application can achieve good thermal insulation effect on the basis of low overall thickness, which is beneficial to reducing the thickness of the thermal insulation composite material 100, reducing material costs, and lightweighting the applied products.

[0060] In some embodiments, the thermal insulation composite material 100 further includes a first bonding layer 140, which is disposed between the ceramic fiber felt material 110 and the vacuum insulation panel 120. The ceramic fiber felt material 110 and the vacuum insulation panel 120 are bonded together by the first bonding layer 140, so that the bonding force between the ceramic fiber felt material 110 and the vacuum insulation panel 120 can be improved.

[0061] In some embodiments, the thermal insulation composite material 100 further includes a second adhesive layer 150, which is disposed between the vacuum insulation panel 120 and the aerogel fiber felt material 130. The vacuum insulation panel 120 and the aerogel fiber felt material 130 are combined by the second adhesive layer 150, so that the bonding force between the vacuum insulation panel 120 and the aerogel fiber felt material 130 can be improved.

[0062] In some embodiments, the first adhesive layer 140 and the second adhesive layer 150 are aluminum phosphate-based adhesive layers. The aluminum phosphate-based adhesive layer is a high temperature resistant adhesive layer. Specifically, after the raw adhesives corresponding to the first adhesive layer 140 and the second adhesive layer 150 are applied to the corresponding positions, the ceramic fiber felt material 110, the vacuum insulation panel 120 and the aerogel fiber felt material 130 are placed in an autoclave for hot pressing treatment to obtain the thermal insulation composite material 100.

[0063] Further, the time of the hot pressing treatment can be 1 hour to 3 hours, such as 1, 2, 3 hours. Further, the temperature of the hot pressing treatment is 100°C to 120°C, such as 100°C, 110°C, 120°C, or within the range formed by any two of the above points as end values. Further, the pressure of the hot pressing treatment is 12MPa to 18MPa, such as 12MPa, 14MPa, 15MPa, 16MPa, 18MPa, or within the range formed by any two of the above points as end values.

[0064] In a second aspect of the present application, a method for preparing a thermal insulation composite material 100 is provided. The thermal insulation composite material 100 is any of the thermal insulation composite materials 100 described above. The preparation method comprises the following steps:

[0065] The ceramic fiber felt material 110 , the vacuum insulation panel 120 , and the aerogel fiber felt material 130 are stacked and arranged.

[0066] The above-mentioned preparation method of the present application has a simple process. In the obtained thermal insulation composite material 100, the ceramic fiber felt material 110 can withstand a high temperature of 1000°C and can be used as the main thermal insulation layer. The vacuum insulation board 120 has a low thermal conductivity as the middle thermal insulation layer. At the same time, a glass fiber inner core 122 is provided in the vacuum inner cavity of the thermal insulation substrate 121. The glass fiber inner core 122 is a thermal insulation material and also has a good thermal insulation effect. It can be used as a safety measure for vacuum insulation to prevent the problem of a significant decrease in the thermal insulation performance of the thermal insulation substrate 121 due to vacuum leakage; on this basis, the combination of the aerogel fiber felt material 130 can further isolate heat. In this way, the thermal insulation performance of the above-mentioned thermal insulation composite material 100 is improved.

[0067] It is understandable that the technical details of the above preparation method that are the same as those of the thermal insulation composite material 100 have been described in detail above and will not be elaborated here.

[0068] In some embodiments, the vacuum insulation panel 120 and the aerogel fiber felt 130 may be sequentially formed on the ceramic fiber felt 110. In other embodiments, the vacuum insulation panel 120 and the ceramic fiber felt 110 may be sequentially formed on the aerogel fiber felt 130. In other embodiments, the adhesive of the first bonding layer 140 may be applied between the ceramic fiber felt 110 and the vacuum insulation panel 120, and the adhesive of the second bonding layer 150 may be applied between the vacuum insulation panel 120 and the aerogel fiber felt 130, and then the above-mentioned laminated structure may be formed simultaneously by a single hot pressing process.

[0069] In a third aspect, the present application provides use of any of the above-mentioned thermal insulation composite materials 100 in preparing products with thermal insulation function.

[0070] The product with heat insulation function has the same technical effect as the above-mentioned heat insulation composite material 100. The product with heat insulation function includes but is not limited to battery components and other components of automobiles.

[0071] In a fourth aspect of the present application, a product with a heat insulation function is provided, comprising a heat source component and any one of the above-mentioned heat insulation composite materials 100 , wherein the heat insulation composite material 100 is disposed adjacent to the heat source component.

[0072] In some embodiments, the thermal insulation composite material 100 is disposed adjacent to the heat source component on the side where the ceramic fiber felt material 110 is located. In other words, the ceramic fiber felt material 110 is used as an inner layer close to the heat source component, and the aerogel fiber felt material 130 is used as an outer layer away from the heat source component.

[0073] In this way, the ceramic fiber felt material 110 is used as the main insulation layer to insulate most of the heat, and the vacuum insulation panel 120 has a lower thermal conductivity as the middle insulation layer. At the same time, a glass fiber inner core 122 is provided in the vacuum inner cavity of the insulation substrate 121. The glass fiber inner core 122 also has a good insulation effect and can be used as a safety measure for vacuum insulation to prevent the problem of a significant decrease in the insulation performance of the insulation substrate 121 due to vacuum leakage; on this basis, the aerogel fiber felt material 130 can be combined to further isolate heat. In this way, the insulation performance of the above-mentioned insulation composite material 100 is improved.

[0074] In order to make the purpose, technical solutions and advantages of the present invention more concise and clear, the present invention is described with the following specific embodiments, but the present invention is by no means limited to these embodiments. The embodiments described below are only preferred embodiments of the present invention, which can be used to describe the present invention and cannot be understood as limiting the scope of the present invention. It should be pointed out that any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

[0075] In order to better illustrate the present invention, the present invention is further described below in conjunction with the embodiments. The following are specific embodiments.

[0076] Example 1

[0077] The structure of the thermal insulation composite material 100 is as follows: Figure 1 As shown, the preparation method is as follows:

[0078] 1. Zirconia ceramic fiber, silica gel and starch are mixed at a mass ratio of 90:7:3 at room temperature to form a felt slurry; the felt slurry is subjected to vacuum filtration to form a wet embryo, and then the moisture is dried to form a 24 cm thick zirconia ceramic fiber felt material 110.

[0079] 2. A metal material (aluminum) is used as the outer layer of an insulation substrate 121 having an inner cavity. The thickness of the outer layer of the insulation board is 3 to 5 mm. A glass fiber inner core 122 is filled in the inner cavity. The inner cavity is vacuumed to prepare a 3 cm thick vacuum insulation panel 120. In the vacuum insulation panel 120, the mass content of the glass fiber inner core 122 is 90%.

[0080] 3. Mix silica aerogel fibers, silica gel and starch at a mass ratio of 90:8:2 at room temperature to form a felt slurry; vacuum filter the felt slurry to form a wet embryo, and then dry the moisture to form an aerogel fiber felt material 130 with a thickness of 15 cm.

[0081] 4. The ceramic fiber felt material 110, the vacuum insulation panel 120 and the aerogel fiber felt material 130 are stacked in sequence, and adjacent two of them are connected by an aluminum phosphate-based high temperature resistant adhesive.

[0082] 5. Finally, the composite material plate obtained in step 4 is placed in an autoclave at a temperature of 110° C. and a pressure of 15 MPa for 2 hours to obtain a thermal insulation composite material 100.

[0083] Comparative Example 1

[0084] Comparative Example 1 is substantially the same as Example 1, except that the vacuum insulation panel 120 is not filled with the glass fiber core 122 .

[0085] The following is the thermal insulation performance test.

[0086] When the volume of the heat source component is 1m 3 When the temperature is 800°C, the thermal insulation composite material 100 of Example 1 is used to contact the heat source component with the side where the ceramic fiber felt material 110 is located, so that the ceramic fiber felt material 110 is the hot side and the side where the aerogel fiber felt material 130 is the cold side. The temperature of the cold side can be maintained at 25°C for a long time within 8 to 10 hours of contact time.

[0087] In comparative example 1, when the contact time is 8 to 10 hours, the cold surface temperature is significantly higher than 25° C. In addition, the vacuum insulation panel 120 of comparative example 1 is not filled with the glass fiber inner core 122, so when subjected to a large pressure, the vacuum inner cavity is prone to collapse or even cause vacuum leakage, resulting in a significant decrease in the insulation performance of the insulation substrate.

[0088] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0089] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the invention patent. It should be pointed out that for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be based on the attached claims, and the description and drawings can be used to interpret the content of the claims.

Claims

1. A thermal insulation composite material, characterized in that: The invention comprises a ceramic fiber felt material, a vacuum insulation board and an aerogel fiber felt material which are stacked in sequence. The vacuum insulation board comprises an insulation substrate with a vacuum inner cavity and a glass fiber inner core arranged in the vacuum inner cavity.

2. The thermal insulation composite material according to claim 1, characterized in that: The ceramic fibers in the ceramic fiber felt material include one or more of zirconium oxide fibers and silicon oxide fibers.

3. The thermal insulation composite material according to claim 2, characterized in that: The ceramic fiber felt material includes not only the ceramic fibers but also silica gel and starch.

4. The thermal insulation composite material according to claim 3, characterized in that: In the ceramic fiber felt material, the mass content of the ceramic fiber is 85% to 95%; and / or, In the ceramic fiber felt material, the mass content of the silica gel is 3% to 10%; and / or, In the ceramic fiber felt material, the mass content of the starch is 2% to 5%.

5. The thermal insulation composite material according to claim 1, characterized in that: The material of the heat insulation substrate is a metal material or a non-metal material, and the non-metal material includes one or more of polyvinylidene chloride, ethylene-vinyl alcohol copolymer and polyethylene naphthalate.

6. The thermal insulation composite material according to claim 1, characterized in that: In the vacuum insulation panel, the mass content of the glass fiber inner core is 85% to 95%.

7. The thermal insulation composite material according to any one of claims 1 to 6, characterized in that: The aerogel fibers in the aerogel fiber felt material include one or more of silica aerogel and polyimide aerogel.

8. The thermal insulation composite material according to claim 7, characterized in that: The aerogel fiber felt material includes not only the aerogel fibers but also silica gel and starch; In the aerogel fiber felt material, the mass content of the aerogel fiber is 85% to 90%, the mass content of the silica gel is 8% to 15%, and the mass content of the starch is 2% to 3%.

9. The thermal insulation composite material according to any one of claims 1 to 6, characterized in that: The thickness of the ceramic fiber felt material is 20 cm to 30 cm; and / or, The thickness of the vacuum insulation panel is 2 cm to 5 cm; and / or, The thickness of the aerogel fiber felt material is 10 cm to 20 cm.

10. The thermal insulation composite material according to any one of claims 1 to 6, characterized in that: The thermal insulation composite material further includes a first bonding layer and a second bonding layer, wherein the first bonding layer is disposed between the ceramic fiber felt material and the vacuum insulation panel, and the second bonding layer is disposed between the vacuum insulation panel and the aerogel fiber felt material.

11. The thermal insulation composite material according to claim 10, characterized in that: The first adhesive layer and the second adhesive layer are aluminum phosphate-based adhesive layers.

12. A method for preparing a thermal insulation composite material, characterized in that: The thermal insulation composite material is the thermal insulation composite material according to any one of claims 1 to 11, and the preparation method comprises the following steps: The ceramic fiber felt material, the vacuum insulation panel and the aerogel fiber felt material are stacked and arranged.

13. Use of the thermal insulation composite material according to any one of claims 1 to 11 in preparing products with thermal insulation function.

14. A product with heat insulation function, characterized in that: It comprises a heat source component and the heat insulation composite material according to any one of claims 1 to 11, wherein the heat insulation composite material is arranged adjacent to the heat source component.

15. The product with heat insulation function according to claim 14, characterized in that: The heat-insulating composite material is arranged adjacent to the heat source component at the side where the ceramic fiber felt material is located.

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