CN111253753A - Heat-insulating composite material and application thereof to engine heat shield - Google Patents
Heat-insulating composite material and application thereof to engine heat shield Download PDFInfo
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- CN111253753A CN111253753A CN202010210669.9A CN202010210669A CN111253753A CN 111253753 A CN111253753 A CN 111253753A CN 202010210669 A CN202010210669 A CN 202010210669A CN 111253753 A CN111253753 A CN 111253753A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L83/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
- C08L83/04—Polysiloxanes
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D1/00—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B77/00—Component parts, details or accessories, not otherwise provided for
- F02B77/11—Thermal or acoustic insulation
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2383/00—Characterised by the use of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen, or carbon only; Derivatives of such polymers
- C08J2383/04—Polysiloxanes
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2483/00—Characterised by the use of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen, or carbon only; Derivatives of such polymers
- C08J2483/04—Polysiloxanes
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
Abstract
The invention discloses a heat insulation composite material which comprises the following raw materials in parts by weight: 20-35 parts of carbon fiber, 15-35 parts of epoxy modified organic silicon resin, 4-18 parts of phenyl silicone rubber, 2-8 parts of nano graphene, 4-10 parts of nano hollow alumina microspheres, 4-15 parts of calcium sulfate whiskers, 2-6 parts of expanded graphite, 2-6 parts of silicon carbide ceramic powder, 1-2 parts of a silane coupling agent, 1-2 parts of an ethylenediamine curing agent, 1-2 parts of a defoaming agent, 1-2 parts of a surfactant, 1-2 parts of a dispersing agent, 1-2 parts of a flow aid and 200 parts of a solvent 100. The invention discloses an application of the heat insulation composite material as a heat insulation cover of an engine. The heat insulation composite material provided by the invention effectively improves the heat insulation performance of the engine heat insulation cover, has long service life, and enhances the mechanical property of the heat insulation cover.
Description
Technical Field
The invention relates to the technical field of engine heat shields, in particular to a heat-insulating composite material and application thereof to an engine heat shield.
Background
An engine is a machine capable of converting other forms of energy into mechanical energy, and includes, for example, an internal combustion engine, an external combustion engine, an electric motor, etc., where an internal combustion engine generally converts chemical energy into mechanical energy, and the engine is applicable to both a power generation device and an entire machine including a power plant.
High-temperature fuel gas generated in the working process of the engine still has very high temperature when entering the exhaust device, and the exhaust device needs to be additionally provided with a heat shield in order to ensure the normal work of external equipment and recycle the residual heat as much as possible and improve the working efficiency of the engine. The automobile engine heat shield is an important part in an automobile covering part, has the performances of heat resistance, corrosion resistance, heat reflection and the like, and plays a role in isolating heat emitted by an engine, thereby playing a certain protection role on other parts of an automobile and reducing the influence of the heat emitted by the automobile on passengers.
The heat shield adopted at present in China is a mode that a common ceramic heat-insulating fiber blanket is wrapped by fiber cloth, the materials have the defects of poor controllability and poor mechanical effect, and the situation of overheating is easy to occur in the application process.
Disclosure of Invention
Based on the technical problems in the prior art, the invention provides a heat insulation composite material and application thereof to an engine heat shield.
The invention provides a heat insulation composite material which comprises the following raw materials in parts by weight: 20-35 parts of carbon fiber, 15-35 parts of epoxy modified organic silicon resin, 4-18 parts of phenyl silicone rubber, 2-8 parts of nano graphene, 4-10 parts of nano hollow alumina microspheres, 4-15 parts of calcium sulfate whiskers, 2-6 parts of expanded graphite, 2-6 parts of silicon carbide ceramic powder, 1-2 parts of a silane coupling agent, 1-2 parts of an ethylenediamine curing agent, 1-2 parts of a defoaming agent, 1-2 parts of a surfactant, 1-2 parts of a dispersing agent, 1-2 parts of a flow aid and 200 parts of a solvent 100.
Preferably, the defoaming agent is at least one of silicone emulsion, polydimethylsiloxane, trialkyl melamine, cyanuric chloride melamine and fatty acid glyceride.
Preferably, the solvent is at least one of xylene, methanol, ethanol, isopropanol.
Preferably, the dispersant is polyvinylpyrrolidone.
Preferably, the glidant is talc and/or aerosil.
Preferably, the silane coupling agent is at least one of vinyltris (β -methoxyethoxy) silane, vinyltriethoxysilane, gamma-mercaptopropyltrimethoxysilane, 3-aminopropyltriethoxysilane, and gamma-glycidoxypropyltrimethoxysilane.
Preferably, the particle size of the nano hollow alumina microsphere is 10-150 nm.
Preferably, the particle size distribution of the nanographene is as follows: 20-40 wt% of 10-50nm, 40-60 wt% of 10-50nm and the balance 10-50 nm.
The preparation method of the heat insulation composite material comprises the following steps:
s1, heating the epoxy modified organic silicon resin and the phenyl silicone rubber to a molten state, sequentially adding the carbon fiber, the calcium sulfate whisker, the expanded graphite and the silicon carbide ceramic powder in a stirring state, adding the dispersing agent and the flow aid, continuously stirring, adding part of the solvent, uniformly stirring, adding the ethylenediamine curing agent, and uniformly oscillating ultrasonically to obtain a premix;
s2, uniformly mixing the nano graphene, the nano hollow alumina microspheres, the silane coupling agent, the defoaming agent, the surfactant and the residual solvent to obtain auxiliary materials;
s3, feeding the premix into a mold for pre-pressing molding, wherein the molding temperature is 70-80 ℃, the molding time is 10-20min, and the molding thickness is 2-4mm, taking out, spraying an auxiliary material on the surface in a spraying mode, the auxiliary material thickness is 0.4-0.6mm, performing heat treatment at 250 ℃ for 10-20min under the protection of nitrogen, continuously heating to 400 ℃ and 450 ℃ for 20-40min, and cooling to obtain the heat-insulating composite material.
The application of the heat-insulating composite material as the heat shield of the engine.
The technical effects of the invention are as follows:
(1) according to the invention, the epoxy modified organic silicon resin and the phenyl silicone rubber are used as a matrix, the carbon fiber and the calcium sulfate whisker are used as reinforcing materials, the expanded graphite and the silicon carbide ceramic powder are used as heat insulation materials, the heat insulation performance of the engine heat shield can be effectively improved through compounding, the service life is long, the generation of cracks can be avoided due to the carbon fiber and the calcium sulfate whisker in the stress process, and the mechanical property of the heat shield is enhanced.
(2) According to the invention, a compact filling structure can be formed on the surface of the prepressing model by adopting nano graphene with different particle sizes, a plurality of hollow cavities are formed by dispersing nano hollow alumina microspheres with specific particle sizes, the nano graphene and the nano hollow alumina microspheres are sprayed on the surface of the prepressing model in a matching way to combine into a hollow wall structure, so that heat conduction can be effectively prevented, and the heat insulation effect of the heat shield can be improved by cooperating with the prepressing model.
(3) In S3 of the preparation method, the premix is sent into a grinding tool to be pre-pressed and formed at the temperature of 70-80 ℃, so that the heat insulation material can be promoted to be preliminarily cross-linked and formed, then the auxiliary materials are sprayed on the surface, and the heat treatment and solidification are sequentially carried out at the temperature of 240-450 ℃, so that the auxiliary materials have extremely high surface bonding strength and strong adhesive force, have uniform heat conductivity, and improve the thermal stability of the obtained heat insulation composite material in a high-temperature environment.
(4) The heat-insulating composite material obtained by the invention is applied to the heat-insulating cover of the engine, and the heat-insulating cover is formed by adopting a thin plate, so that the heat-insulating composite material has the advantages of light weight, good heat-insulating effect, excellent mechanical property and no deformation.
Drawings
Fig. 1 is a schematic diagram of an experimental chamber in the thermal insulation performance test of the invention.
Detailed Description
The technical solution of the present invention will be described in detail below with reference to specific examples.
Example 1
A preparation method of a heat insulation composite material comprises the following steps:
s1, heating 15kg of epoxy modified organic silicon resin and 18kg of phenyl silicone rubber to a molten state, sequentially adding 20kg of carbon fiber, 15kg of calcium sulfate whisker, 2kg of expanded graphite and 6kg of silicon carbide ceramic powder under a stirring state, stirring at a speed of 400r/min for 8min, adding 1kg of polyvinylpyrrolidone and 2kg of talcum powder, continuously stirring for 5min, adding 70kg of xylene, uniformly stirring, adding 1kg of ethylenediamine curing agent, and uniformly oscillating ultrasonically to obtain a premix;
s2, uniformly mixing 8kg of nano graphene, 4kg of nano hollow alumina microspheres with the particle size of 150nm, 1kg of vinyl triethoxysilane, 2kg of emulsified silicone oil, 1kg of surfactant and 30kg of dimethylbenzene to obtain auxiliary materials;
s3, feeding the premix into a mold for pre-pressing molding, wherein the molding temperature is 80 ℃, the molding time is 10min, the molding thickness is 4mm, taking out the premix, spraying an auxiliary material on the surface of the premix in a spraying mode, the thickness of the auxiliary material is 0.4mm, performing heat treatment at 250 ℃ for 10min under the protection of nitrogen, continuously heating to 450 ℃ for 20min, and cooling to obtain the heat-insulating composite material.
The particle size distribution of the nano graphene is as follows: 40 wt% of 10-50nm, 40 wt% of 10-50nm and the balance 10-50 nm.
Example 2
A preparation method of a heat insulation composite material comprises the following steps:
s1, heating 35kg of epoxy modified organic silicon resin and 4kg of phenyl silicone rubber to a molten state, sequentially adding 35kg of carbon fiber, 4kg of calcium sulfate whisker, 6kg of expanded graphite and 2kg of silicon carbide ceramic powder under a stirring state, stirring at a speed of 500r/min for 2min, adding 2kg of polyvinylpyrrolidone and 1kg of micro silica gel powder, continuously stirring for 10min, adding 120kg of methanol, uniformly stirring, adding 2kg of ethylenediamine curing agent, and uniformly oscillating ultrasonically to obtain a premix;
s2, uniformly mixing 2kg of nano graphene, 10kg of nano hollow alumina microspheres with the particle size of 100nm, 2kg of gamma-mercaptopropyl trimethoxy silane, 1kg of trialkyl melamine, 2kg of surfactant and 80kg of methanol to obtain auxiliary materials;
s3, feeding the premix into a mold for pre-pressing molding, wherein the molding temperature is 70 ℃, the molding time is 20min, the molding thickness is 2mm, taking out, spraying an auxiliary material with the thickness of 0.6mm on the surface in a spraying mode, carrying out heat treatment at 240 ℃ for 20min under the protection of nitrogen, continuously heating to 400 ℃ for heat treatment for 40min, and cooling to obtain the heat-insulating composite material.
The particle size distribution of the nano graphene is as follows: 20 wt% of 10-50nm, 60 wt% of 10-50nm and the balance 10-50 nm.
Example 3
A preparation method of a heat insulation composite material comprises the following steps:
s1, heating 20kg of epoxy modified organic silicon resin and 16kg of phenyl silicone rubber to a molten state, sequentially adding 25kg of carbon fiber, 12kg of calcium sulfate whisker, 3kg of expanded graphite and 5kg of silicon carbide ceramic powder under a stirring state, stirring at the speed of 420r/min for 6min, adding 1.2kg of polyvinylpyrrolidone, 1kg of talcum powder and 0.7kg of micro silica gel powder, continuing stirring for 6min, adding 100.5kg of ethanol, stirring uniformly, adding 1.2kg of ethylenediamine curing agent, and performing ultrasonic oscillation uniformly to obtain a premix;
s2, uniformly mixing 6kg of nano graphene, 6kg of nano hollow alumina microspheres with the particle size of 80nm, 1.2kg of vinyl tris (β -methoxyethoxy) silane, 1.7kg of cyanuric chloride melamine, 1.2kg of surfactant and 49.5kg of ethanol to obtain auxiliary materials;
s3, feeding the premix into a mold for pre-pressing molding, wherein the molding temperature is 77 ℃, the molding time is 12min, the molding thickness is 3mm, taking out, spraying an auxiliary material with the thickness of 0.5mm on the surface in a spraying mode, carrying out heat treatment at 248 ℃ for 12min under the protection of nitrogen, continuously heating to 440 ℃ for 25min, and cooling to obtain the heat-insulating composite material.
The particle size distribution of the nano graphene is as follows: 35 wt% of 10-50nm, 45 wt% of 10-50nm and the balance 10-50 nm.
Example 4
A preparation method of a heat insulation composite material comprises the following steps:
s1, heating 30kg of epoxy modified organic silicon resin and 6kg of phenyl silicone rubber to a molten state, sequentially adding 30kg of carbon fiber, 6kg of calcium sulfate whisker, 5kg of expanded graphite and 3kg of silicon carbide ceramic powder under a stirring state, stirring at 480r/min for 4min, adding 1.8kg of polyvinylpyrrolidone and 1.3kg of talcum powder, continuously stirring for 8min, adding 94.5kg of isopropanol, uniformly stirring, adding 1.8kg of ethylenediamine curing agent, and uniformly oscillating ultrasonically to obtain a premix;
s2, uniformly mixing 4kg of nano graphene, 8kg of nano hollow alumina microspheres with the particle size of 40nm, 1.8kg of gamma-glycidyl ether oxypropyltrimethoxysilane, 1.3kg of polydimethylsiloxane, 1.8kg of surfactant and 55.5kg of isopropanol to obtain auxiliary materials;
s3, feeding the premix into a mold for pre-pressing molding, wherein the molding temperature is 73 ℃, the molding time is 18min, the molding thickness is 3mm, taking out, spraying an auxiliary material on the surface in a spraying mode, the auxiliary material is 0.5mm in thickness, performing heat treatment at 242 ℃ for 18min under the protection of nitrogen, continuously heating to 420 ℃ for heat treatment for 35min, and cooling to obtain the heat-insulating composite material.
The particle size distribution of the nano graphene is as follows: 25 wt% of 10-50nm, 55 wt% of 10-50nm and the balance 10-50 nm.
Example 5
A preparation method of a heat insulation composite material comprises the following steps:
s1, heating 25kg of epoxy modified organic silicon resin and 11kg of phenyl silicone rubber to a molten state, sequentially adding 28kg of carbon fiber, 9kg of calcium sulfate whisker, 4kg of expanded graphite and 4kg of silicon carbide ceramic powder under a stirring state, stirring at the speed of 450r/min for 5min, adding 1.5kg of polyvinylpyrrolidone and 1.5kg of micro silica gel, continuously stirring for 7min, adding 97.5kg of ethanol, stirring uniformly, adding 1.5kg of ethylenediamine curing agent, and performing ultrasonic oscillation uniformly to obtain a premix;
s2, uniformly mixing 5kg of nano graphene, 7kg of nano hollow alumina microspheres with the particle size of 30nm, 1.5kg of 3-aminopropyltriethoxysilane, 1.5kg of fatty acid glyceride, 1.5kg of surfactant and 52.5kg of ethanol to obtain auxiliary materials;
s3, feeding the premix into a mold for pre-pressing molding, wherein the molding temperature is 75 ℃, the molding time is 15min, the molding thickness is 3mm, taking out, spraying an auxiliary material with the thickness of 0.5mm on the surface in a spraying mode, carrying out heat treatment at 245 ℃ for 15min under the protection of nitrogen, continuously heating to 430 ℃ for heat treatment for 30min, and cooling to obtain the heat-insulating composite material.
The particle size distribution of the nano graphene is as follows: 30 wt% of 10-50nm, 50 wt% of 10-50nm and the balance 10-50 nm.
The mechanical property test of the heat insulation composite material obtained in the examples 1 to 5 is carried out, and the result is as follows:
| example 1 | Example 2 | Example 3 | Example 4 | Example 5 | |
| Density, kg/m3 | 564 | 550 | 542 | 536 | 531 |
| Tensile strength, Mpa | 85.9 | 92.4 | 90.3 | 88.7 | 90.6 |
| Elongation at break,% | 171 | 183 | 185 | 178 | 192 |
| Compressive strength, Mpa | 0.42 | 0.40 | 0.41 | 0.37 | 0.45 |
| Bending strength Mpa | 2.50 | 2.48 | 2.35 | 2.44 | 2.46 |
The insulation composite materials obtained in examples 1 to 5 were subjected to the insulation performance test as follows: as shown in fig. 1, a wire mesh 1 is adopted as a heat-insulated piece in an experimental chamber, a non-metal material is placed on the wire mesh as a support 2, a heat-insulated composite material 3 to be measured is placed on the support 2, the distance between the upper surface of the heat-insulated composite material 3 to be measured and a high-temperature heat source 4 is 36mm, the distance between the lower surface of the heat-insulated composite material 3 to be measured and the upper surface of the wire mesh 1 is 11mm, and a sensor 5 is arranged.
Closing the laboratory cabin door, opening the vent hole, and adjusting the temperature in the cabin to 60 ℃; when the thermal insulation composite material 3 to be measured is not placed, the temperature obtained by the sensor 5 is set as a target temperature, the target temperature is set as 80 ℃, 100 ℃, 120 ℃, 140 ℃ and 160 ℃, and the temperature of the high-temperature heat source 4 (marked as a ℃, b ℃, c ℃, d ℃ and e ℃) is recorded; then placing the heat insulation composite material 3 to be tested, sequentially heating the high-temperature heat source 4 to a ℃, b ℃, c ℃, d ℃ and e ℃, and respectively recording the temperatures obtained by the sensor 5, wherein the results are as follows:
| target temperature without insulating composite to be measured | 80℃ | 100℃ | 120℃ | 140℃ | 160℃ |
| Temperature of high temperature heat source | 145℃ | 181℃ | 235℃ | 286℃ | 322℃ |
| Example 1 target temperature of the thermal insulation composite to be measured | 30℃ | 32℃ | 37℃ | 47℃ | 56℃ |
| Example 2 target temperature of the thermal insulation composite to be measured | 34℃ | 35℃ | 43℃ | 51℃ | 59℃ |
| Example 3 target temperature of the thermal insulation composite to be measured | 32℃ | 35℃ | 41℃ | 50℃ | 58℃ |
| Example 4 target temperature of the thermal insulation composite to be measured | 31℃ | 34℃ | 39℃ | 49℃ | 56℃ |
| Example 5 target temperature of the thermal insulation composite to be measured | 31℃ | 33℃ | 38℃ | 47℃ | 56℃ |
From the above experimental results, it can be seen that: the heat-insulating composite material obtained by the invention has the advantages of light weight, good heat-insulating effect, excellent mechanical property and no deformation, and is suitable for the heat-insulating cover of the engine.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (10)
1. The heat insulation composite material is characterized by comprising the following raw materials in parts by weight: 20-35 parts of carbon fiber, 15-35 parts of epoxy modified organic silicon resin, 4-18 parts of phenyl silicone rubber, 2-8 parts of nano graphene, 4-10 parts of nano hollow alumina microspheres, 4-15 parts of calcium sulfate whiskers, 2-6 parts of expanded graphite, 2-6 parts of silicon carbide ceramic powder, 1-2 parts of a silane coupling agent, 1-2 parts of an ethylenediamine curing agent, 1-2 parts of a defoaming agent, 1-2 parts of a surfactant, 1-2 parts of a dispersing agent, 1-2 parts of a flow aid and 200 parts of a solvent 100.
2. The heat insulating composite material as claimed in claim 1, wherein the defoaming agent is at least one of silicone emulsion, polydimethylsiloxane, trialkyl melamine, cyanuric chloride melamine, and fatty acid glyceride.
3. The heat insulating composite material as claimed in claim 1, wherein the solvent is at least one of xylene, methanol, ethanol, and isopropanol.
4. The insulating composite of claim 1, wherein the dispersant is polyvinylpyrrolidone.
5. The heat-insulating composite material as claimed in claim 1, wherein the flow aid is talc and/or silica gel micropowder.
6. The insulating composite of claim 1, wherein the silane coupling agent is at least one of vinyltris (β -methoxyethoxy) silane, vinyltriethoxysilane, gamma-mercaptopropyltrimethoxysilane, 3-aminopropyltriethoxysilane, and gamma-glycidoxypropyltrimethoxysilane.
7. The heat insulating composite material as claimed in claim 1, wherein the nano hollow alumina microsphere has a particle size of 10-150 nm.
8. The heat-insulating composite material as claimed in claim 1, wherein the nano-graphene has a particle size distribution as follows: 20-40 wt% of 10-50nm, 40-60 wt% of 10-50nm and the balance 10-50 nm.
9. A method of making a thermal insulation composite as claimed in any one of claims 1 to 8, comprising the steps of:
s1, heating the epoxy modified organic silicon resin and the phenyl silicone rubber to a molten state, sequentially adding the carbon fiber, the calcium sulfate whisker, the expanded graphite and the silicon carbide ceramic powder in a stirring state, adding the dispersing agent and the flow aid, continuously stirring, adding part of the solvent, uniformly stirring, adding the ethylenediamine curing agent, and uniformly oscillating ultrasonically to obtain a premix;
s2, uniformly mixing the nano graphene, the nano hollow alumina microspheres, the silane coupling agent, the defoaming agent, the surfactant and the residual solvent to obtain auxiliary materials;
s3, feeding the premix into a mold for pre-pressing molding, wherein the molding temperature is 70-80 ℃, the molding time is 10-20min, and the molding thickness is 2-4mm, taking out, spraying an auxiliary material on the surface in a spraying mode, the auxiliary material thickness is 0.4-0.6mm, performing heat treatment at 250 ℃ for 10-20min under the protection of nitrogen, continuously heating to 400 ℃ and 450 ℃ for 20-40min, and cooling to obtain the heat-insulating composite material.
10. Use of the thermal composite of any of claims 1-8 as an engine heat shield.
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| CN202010210669.9A CN111253753A (en) | 2020-03-24 | 2020-03-24 | Heat-insulating composite material and application thereof to engine heat shield |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022088117A1 (en) * | 2020-10-30 | 2022-05-05 | 河北比尔尼克新材料科技股份有限公司 | Preparation method for and application of water-based acrylic resin anti-rust insulating paint special for motor |
| CN115162021A (en) * | 2022-07-29 | 2022-10-11 | 上海毅登新材料科技有限公司 | Formula and preparation method of aircraft engine heat shield |
| CN116285653A (en) * | 2023-04-15 | 2023-06-23 | 千浪化研新材料(上海)有限公司 | UV dual-curing highlight paint and preparation method thereof |
-
2020
- 2020-03-24 CN CN202010210669.9A patent/CN111253753A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022088117A1 (en) * | 2020-10-30 | 2022-05-05 | 河北比尔尼克新材料科技股份有限公司 | Preparation method for and application of water-based acrylic resin anti-rust insulating paint special for motor |
| CN115162021A (en) * | 2022-07-29 | 2022-10-11 | 上海毅登新材料科技有限公司 | Formula and preparation method of aircraft engine heat shield |
| CN115162021B (en) * | 2022-07-29 | 2024-05-07 | 上海毅登新材料科技有限公司 | Formula and preparation method of aircraft engine heat shield |
| CN116285653A (en) * | 2023-04-15 | 2023-06-23 | 千浪化研新材料(上海)有限公司 | UV dual-curing highlight paint and preparation method thereof |
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Application publication date: 20200609 |