CN111825423A - Efficient heat insulation sheet and preparation method thereof - Google Patents
Efficient heat insulation sheet and preparation method thereof Download PDFInfo
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- CN111825423A CN111825423A CN202010736106.3A CN202010736106A CN111825423A CN 111825423 A CN111825423 A CN 111825423A CN 202010736106 A CN202010736106 A CN 202010736106A CN 111825423 A CN111825423 A CN 111825423A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B30/00—Compositions for artificial stone, not containing binders
- C04B30/02—Compositions for artificial stone, not containing binders containing fibrous materials
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
- C04B26/02—Macromolecular compounds
- C04B26/10—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C04B26/18—Polyesters; Polycarbonates
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
- C04B41/5024—Silicates
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/60—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only artificial stone
- C04B41/61—Coating or impregnation
- C04B41/65—Coating or impregnation with inorganic materials
- C04B41/68—Silicic acid; Silicates
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00034—Physico-chemical characteristics of the mixtures
- C04B2111/00146—Sprayable or pumpable mixtures
- C04B2111/00155—Sprayable, i.e. concrete-like, materials able to be shaped by spraying instead of by casting, e.g. gunite
Abstract
The invention belongs to the technical field of heat insulation, and discloses a high-efficiency heat insulation sheet and a preparation method thereof. The paint coating is sprayed on one side surface of the substrate layer; the coating layer is composed of unsaturated resin, an initiator, a coupling agent, a fiber material and hollow glass beads. Stirring and mixing unsaturated resin, an initiator, a coupling agent, a fiber material and hollow glass beads uniformly to obtain slurry A; uniformly stirring and mixing aerogel powder, an infrared opacifier and short fibers to obtain a mixture B; pressing and forming the mixture B to obtain a base material layer; spraying the slurry A on the surface of one side of the base material layer, and then curing according to a curing process of firstly preserving heat at 20-30 ℃ for 1-3 h and then preserving heat at 40-50 ℃ for 2-4 h; and (4) carrying out heat treatment after the solidification is finished to obtain the high-efficiency heat insulation sheet. The heat insulation sheet provided by the invention realizes high-efficiency heat insulation and preservation effects at different medium-high temperature sections.
Description
Technical Field
The invention belongs to the technical field of heat insulation, and particularly relates to a high-efficiency heat insulation sheet and a preparation method thereof.
Background
The traditional heat-insulating and fire-resistant materials such as light bricks, fire-resistant fibers, ceramic fiber blankets and the like have relatively high heat conductivity coefficient, and cannot meet the energy-saving requirement that the temperature of the outer wall of industrial equipment is lower than 70 ℃ under a given thickness, so that insulating materials with low heat conductivity are more and more favored by people. Hunt et al, in the early 90 s of the 20 th century, first proposed the concept of super insulation, i.e., insulation with a thermal conductivity lower than that of "still air" under specific use conditions.
Currently, there are two main types of super insulation materials: one is a vacuum insulation material and the other is a nanoporous insulation material. The aerogel serving as a nano porous transparent heat-insulating material has high porosity (85-99%), small average pore diameter (2-50 nm) and large specific surface area (500-1300 m)2(g), low density (30-150 kg/m)3) And the thermal conductivity (0.01-0.02W/(m.K)) of the material is lower than that of air at room temperature, so that the material is also called as a super heat-insulating material and has wide application prospect in the field of heat insulation and heat preservation.
The aerogel is excellent in thermal insulation performance when used at low temperature, but the thermal conductivity is rapidly increased when used at high temperature, and the reason is that the aerogel almost completely transmits near-infrared radiation of 2.5-8 mu m, while the radiation at 300-1300K is mainly in the waveband, and the radiation heat transfer at high temperature is a main energy transfer mode, so that SiO is caused2The thermal conductivity of aerogels increases rapidly with increasing temperature, losing super-insulating properties at moderate to high temperatures. Thus pure SiO2The aerogel has poor high-temperature radiation inhibition performance. To solve the above problemsThe most common method in the prior art is to introduce an infrared opacifier, which can reduce the thermal conductivity coefficient of the material at high temperature to a certain extent or reduce the temperature of the outer wall of the industrial equipment by increasing the thickness of the heat insulation material, but the temperature can not be effectively reduced when the temperature of the outer wall of the equipment is reduced to 200 ℃, the heat insulation effect is not ideal after 200 ℃, the energy can not be well utilized due to heat dissipation, and the resource waste is caused. Therefore, how to effectively reduce the temperature of the outer wall of the industrial equipment still needs to be solved.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide an efficient heat insulation sheet and a preparation method thereof.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
the efficient heat insulation sheet comprises a substrate layer and a coating layer, wherein the coating layer is sprayed on one side surface of the substrate layer; the coating layer is composed of unsaturated resin, an initiator, a coupling agent, a fiber material and hollow glass beads in a mass ratio of (2-20) to (0.02-0.05) to (0.5-5) to (20-50) to 100.
Preferably, the aerogel powder is one or more of silicon dioxide aerogel powder, aluminum oxide aerogel powder, titanium dioxide aerogel powder and zirconium dioxide aerogel powder.
Preferably, the infrared opacifier is one or more of rutile, titanium dioxide, potassium hexatitanate whisker, zircon, titanium dioxide and silicon carbide micro powder.
Preferably, the short fiber has a length of 50-500 μm, and is one or more of carbon fiber, boron fiber, silicon carbide fiber, silicon nitride fiber, quartz fiber, alumina fiber, zirconia fiber, glass fiber, aluminum silicate fiber, and mullite fiber.
Preferably, the unsaturated resin is one or more of unsaturated polyester resin 191#, unsaturated polyester resin 197#, vinyl resin MFE-2 and vinyl resin VER-2.
Preferably, the initiator is one or more of methyl ethyl ketone peroxide, cobalt naphthenate, BPO and AIBN.
Preferably, the coupling agent is one or more of a silane coupling agent, a titanate coupling agent, an aluminate coupling agent and a borate coupling agent.
Preferably, the fiber material is one or more of carbon fiber, glass fiber and basalt fiber.
Preferably, the density of the hollow glass beads is 0.15-0.60 g/cm3。
The preparation method of the efficient heat insulation sheet comprises the following steps:
(1) stirring and mixing the unsaturated resin, the initiator, the coupling agent, the fiber material and the hollow glass beads uniformly to obtain slurry A;
(2) uniformly stirring and mixing the aerogel powder, the infrared opacifier and the short fibers to obtain a mixture B;
(3) pressing and forming the mixture B obtained in the step (2) to obtain a base material layer;
(4) spraying the slurry A obtained in the step (1) on one side surface of the substrate layer obtained in the step (3), and then curing according to a curing process of firstly preserving heat at 20-30 ℃ for 1-3 h and then preserving heat at 40-50 ℃ for 2-4 h;
(5) and (5) carrying out heat treatment on the product obtained after the solidification in the step (4) to obtain the efficient heat insulation sheet.
Preferably, in the step (3), the pressure of the compression molding is 0.8-5 MPa; in the step (5), the temperature of the heat treatment is 550-700 ℃, and the time is 0.5-2 h.
Has the advantages that:
(1) the aerogel powder, the short fibers and the infrared opacifier are integrally pressed and formed to prepare the base material layer, so that the forming process is simple, the production efficiency is high, and the cost is low;
(2) the fiber material and the hollow glass beads are closely combined by adopting unsaturated resin as a binder through a curing molding mode, and then the unsaturated resin is removed under the action of high temperature, so that the obtained inorganic heat-insulating material has more obvious advantages, namely lower density and good compression resistance, compared with the traditional organic heat-insulating flame-retardant material; compared with inorganic heat-insulating materials such as aerogel and the like, the trouble that particles are easy to fall off is effectively reduced on the basis of ensuring excellent heat-insulating and heat-preserving characteristics, and the particles are used as the outermost layer of the heat-insulating sheet, so that the phenomena of frangibility and powder falling after the aerogel powder is pressed and formed are avoided;
(3) the heat insulation sheet obtained by the invention realizes high-efficiency heat insulation and preservation effects at different medium-high temperature sections, and the forming process design of the heat insulation sheet has important practical significance for the convenience and reliability of the heat insulation sheet in the using and transporting processes;
(4) when the heat insulation sheet is used, one side layer of the spray coating layer is far away from one side of the outer wall of the industrial equipment, so that one side of the heat insulation sheet close to the outer wall of the industrial equipment can be kept at a high temperature, and one side of the heat insulation sheet far away from the outer wall of the industrial equipment is kept at a medium-low temperature, so that the phenomenon that the temperature of one side far away from the outer wall of the industrial equipment is too high is avoided, and the energy-saving requirement that the temperature of.
Detailed Description
The present invention will be further described with reference to the following specific examples. It should be understood that the following examples are illustrative only and are not intended to limit the scope of the present invention.
Example 1
The efficient heat insulation sheet comprises a substrate layer and a coating layer, wherein the coating layer is sprayed on one side surface of the substrate layer; wherein the base material layer consists of aerogel powder, an infrared opacifier and short fibers according to the mass ratio of 60: 15: 2, and the coating layer consists of unsaturated resin, an initiator, a coupling agent, a fiber material and hollow glass microspheres according to the mass ratio of 2: 0.02: 0.5: 20: 100; the aerogel powder is silicon dioxide aerogel powder; the infrared opacifier is rutile; the length of the short fiber is 500 mu m, and the short fiber is carbon fiber; the unsaturated resin is unsaturated polyester resin 191 #; the initiator is methyl ethyl ketone peroxide; the coupling agent is a silane coupling agent; the above-mentionedThe fiber material is glass fiber; the density of the hollow glass beads is 0.60 g/cm3。
The preparation method of the high-efficiency heat insulation sheet comprises the following preparation steps:
(1) stirring and mixing the unsaturated resin, the initiator, the coupling agent, the fiber material and the hollow glass beads uniformly to obtain slurry A;
(2) uniformly stirring and mixing the aerogel powder, the infrared opacifier and the short fibers to obtain a mixture B;
(3) pressing the mixture B obtained in the step (2) into a mould under 0.8MPa to obtain a substrate layer;
(4) spraying the slurry A obtained in the step (1) on one side surface of the base material layer obtained in the step (3), and then curing according to a curing process of firstly preserving heat at 20 ℃ for 3 hours and then preserving heat at 40 ℃ for 4 hours;
(5) and (3) carrying out heat treatment on the product obtained after the curing in the step (4) at 550 ℃ for 2h to obtain the high-efficiency heat insulation sheet.
Example 2
The efficient heat insulation sheet comprises a substrate layer and a coating layer, wherein the coating layer is sprayed on one side surface of the substrate layer; wherein the base material layer consists of aerogel powder, an infrared opacifier and short fibers according to the mass ratio of 80: 30: 10, and the coating layer consists of unsaturated resin, an initiator, a coupling agent, a fiber material and hollow glass microspheres according to the mass ratio of 20: 0.05: 5: 50: 100; the aerogel powder is aluminum oxide aerogel powder; the infrared opacifier is titanium dioxide; the length of the short fiber is 50 μm, and the short fiber is silicon carbide fiber; the unsaturated resin is vinyl resin VER-2; the initiator is cobalt naphthenate; the coupling agent is a titanate coupling agent; the fiber material is basalt fiber; the density of the hollow glass beads is 0.15 g/cm3。
The preparation method of the high-efficiency heat insulation sheet comprises the following preparation steps:
(1) stirring and mixing the unsaturated resin, the initiator, the coupling agent, the fiber material and the hollow glass beads uniformly to obtain slurry A;
(2) uniformly stirring and mixing the aerogel powder, the infrared opacifier and the short fibers to obtain a mixture B;
(3) pressing and molding the mixture B obtained in the step (2) under 5 MPa to obtain a substrate layer;
(4) spraying the slurry A obtained in the step (1) on one side surface of the base material layer obtained in the step (3), and then curing according to a curing process of firstly preserving heat at 30 ℃ for 1h and then preserving heat at 50 ℃ for 2 h;
(5) and (3) carrying out heat treatment on the product obtained in the step (4) at 700 ℃ for 0.5 h after the curing is finished, thus obtaining the efficient heat insulation sheet.
Example 3
The efficient heat insulation sheet comprises a substrate layer and a coating layer, wherein the coating layer is sprayed on one side surface of the substrate layer; wherein the base material layer consists of aerogel powder, an infrared opacifier and short fibers according to the mass ratio of 70: 20: 6, and the coating layer consists of unsaturated resin, an initiator, a coupling agent, a fiber material and hollow glass microspheres according to the mass ratio of 11: 0.03: 3: 35: 100; the aerogel powder is titanium dioxide aerogel powder; the infrared opacifier is silicon carbide micro powder; the length of the short fiber is 200 mu m, and the short fiber is quartz fiber; the unsaturated resin is vinyl resin MFE-2; the initiator is AIBN; the coupling agent is a borate coupling agent; the fiber material is carbon fiber; the density of the hollow glass beads is 0.30 g/cm3。
The preparation method of the high-efficiency heat insulation sheet comprises the following preparation steps:
(1) stirring and mixing the unsaturated resin, the initiator, the coupling agent, the fiber material and the hollow glass beads uniformly to obtain slurry A;
(2) uniformly stirring and mixing the aerogel powder, the infrared opacifier and the short fibers to obtain a mixture B;
(3) pressing and molding the mixture B obtained in the step (2) under 3MPa to obtain a substrate layer;
(4) spraying the slurry A obtained in the step (1) on one side surface of the base material layer obtained in the step (3), and then curing according to a curing process of firstly preserving heat at 25 ℃ for 2 hours and then preserving heat at 45 ℃ for 3 hours;
(5) and (3) carrying out heat treatment on the product obtained in the step (4) at 600 ℃ for 1h after the curing is finished, thus obtaining the efficient heat insulation sheet.
Application example
The high-efficiency heat insulation sheet obtained in example 3 was fixed on the outer surface of an industrial furnace body at a temperature of 1000 ℃, the coating layer was kept away from the surface of the furnace body, the substrate layer was closely attached to the outer surface, after a period of heat preservation, the temperature of one side of the coating layer of the heat insulation sheet was constant, at this time, a heat preservation effect test was performed, different points were selected on one side of the coating layer for temperature tests, and an average value was obtained, and the temperature of the surface of the heat insulation sheet was 68 ℃, indicating that the heat insulation sheet of the present invention realizes an effective heat insulation effect.
Claims (10)
1. The utility model provides a high-efficient heat shield which characterized in that: the paint coating is sprayed on one side surface of the substrate layer; the coating layer is composed of unsaturated resin, an initiator, a coupling agent, a fiber material and hollow glass beads in a mass ratio of (2-20) to (0.02-0.05) to (0.5-5) to (20-50) to 100.
2. The high efficiency thermal shield of claim 1, wherein: the aerogel powder is one or more of silicon dioxide aerogel powder, aluminum oxide aerogel powder, titanium dioxide aerogel powder and zirconium dioxide aerogel powder.
3. The high efficiency thermal shield of claim 1, wherein: the infrared opacifier is one or more of rutile, titanium dioxide, potassium hexatitanate whisker, zircon, titanium dioxide and silicon carbide micro powder.
4. The high efficiency thermal shield of claim 1, wherein: the short fiber is 50-500 μm in length, and is one or more of carbon fiber, boron fiber, silicon carbide fiber, silicon nitride fiber, quartz fiber, alumina fiber, zirconia fiber, glass fiber, aluminum silicate fiber and mullite fiber.
5. The high efficiency thermal shield of claim 1, wherein: the unsaturated resin is one or more of unsaturated polyester resin 191#, unsaturated polyester resin 197#, vinyl resin MFE-2 and vinyl resin VER-2.
6. The high efficiency thermal shield of claim 1, wherein: the initiator is one or more of methyl ethyl ketone peroxide, cobalt naphthenate, BPO and AIBN.
7. The high efficiency thermal shield of claim 1, wherein: the coupling agent is one or more of silane coupling agent, titanate coupling agent, aluminate coupling agent and borate coupling agent.
8. The high efficiency thermal shield of claim 1, wherein: the fiber material is one or more of carbon fiber, glass fiber and basalt fiber.
9. A method for preparing the high-efficiency heat insulation sheet as claimed in any one of claims 1 to 8, which comprises the following steps:
(1) stirring and mixing the unsaturated resin, the initiator, the coupling agent, the fiber material and the hollow glass beads uniformly to obtain slurry A;
(2) uniformly stirring and mixing the aerogel powder, the infrared opacifier and the short fibers to obtain a mixture B;
(3) pressing and forming the mixture B obtained in the step (2) to obtain a base material layer;
(4) spraying the slurry A obtained in the step (1) on one side surface of the substrate layer obtained in the step (3), and then curing according to a curing process of firstly preserving heat at 20-30 ℃ for 1-3 h and then preserving heat at 40-50 ℃ for 2-4 h;
(5) and (5) carrying out heat treatment on the product obtained after the solidification in the step (4) to obtain the efficient heat insulation sheet.
10. The method for preparing a high efficiency thermal insulating sheet according to claim 9, wherein: in the step (3), the pressure of the compression molding is 0.8-5 MPa; in the step (5), the temperature of the heat treatment is 550-700 ℃, and the time is 0.5-2 h.
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Cited By (4)
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| CN112549573A (en) * | 2020-11-24 | 2021-03-26 | 上海涂固安高科技有限公司 | Preparation and application of integrated wallboard with heat insulation, heat preservation and infrared physiotherapy sterilization functions |
| CN113511838A (en) * | 2021-08-16 | 2021-10-19 | 天长市康美达新型绝热材料有限公司 | High-strength heat-insulating material and preparation method thereof |
| CN114181411A (en) * | 2021-12-10 | 2022-03-15 | 成都德斐生物科技有限公司 | Hydrogel material with high cold/heat insulation effect |
| CN114516202A (en) * | 2022-02-23 | 2022-05-20 | 河南爱彼爱和新材料有限公司 | Aerogel heat insulation core material and high-performance aerogel composite heat insulation pad |
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Application publication date: 20201027 |