CN110950629A - Silica aerogel composite thermal insulation material and preparation method thereof - Google Patents
Silica aerogel composite thermal insulation material and preparation method thereof Download PDFInfo
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/34—Non-shrinking or non-cracking materials
- C04B2111/343—Crack resistant materials
Abstract
The invention provides a silicon aerogel composite thermal insulation material and a preparation method thereof, wherein the preparation method sequentially comprises the following steps: preparing a gel precursor by using a silica sol solution and a silane cross-linking agent, immersing a fiber raw material into the gel precursor for gelation, distilling to remove water, performing hydrophobic treatment, vacuumizing and drying to finally obtain the silica aerogel thermal insulation material with excellent thermal insulation performance and mechanical property. The preparation method provided by the invention has low production cost and is more beneficial to industrial application, and the obtained silicon aerogel composite thermal insulation material has high bonding strength, is not easy to crack and is more beneficial to use.
Description
Technical Field
The invention relates to the field of heat insulation materials, in particular to a silicon aerogel composite heat insulation material and a preparation method thereof.
Background
Energy conservation is of great significance to human survival and sustainable development, and not only is limited resource saved, but also the environment on which human lives can be improved. The search for and development of effective heat insulating materials has been a subject of attention, and research in the field of materials has not been stopped. Low heat conductivity coefficient, flame retardance and high temperature resistance, and is a core index of heat insulation materials. The silicon aerogel (represented by silicon dioxide aerogel) effectively limits the propagation of local thermal excitation due to the nano network structure, so that the solid thermal conductivity coefficient of the silicon aerogel is 2-3 orders of magnitude lower than that of a corresponding glassy material, and due to the silicon aerogel has a three-dimensional network structure, pores are filled in the silicon aerogel, so that a heat conduction path is prevented, the thermal conductivity coefficient of the silicon aerogel can be only 0.015W/(m.K) at normal temperature and is far lower than that of static air at normal temperature by 0.025W/(m.K), the silicon aerogel is a solid material with the lowest thermal conductivity at present, and the silicon aerogel is a development trend of research and application of a thermal insulation material as a thermal insulation material with the best comprehensive performance.
The nanometer-scale holes of the silica aerogel inhibit the contribution of gas molecules to heat conduction, and are a key characteristic for realizing high-efficiency heat insulation, but the brittleness of the porous aerogel causes poor processing performance, and further popularization and application of the porous aerogel are also hindered, so a large number of solutions are promoted, and from the consideration of effects and processability, the well-known method realizes reinforcement by adding fiber raw materials, particularly the silica aerogel heat insulation felt or similar composite materials prepared by compounding the fibers and the silica aerogel is considered to better solve the problem, and the method is an effective way for further expanding the application range of the silica aerogel due to the improvement of the processability while providing excellent heat insulation.
Chinese patent ZL 201410787165.8 discloses a preparation process of a glass fiber composite silica aerogel heat preservation felt, wherein silica aerogel glue solution is sprayed on a glass fiber felt until the glass fiber felt is saturated and absorbs the glue solution, a glass fiber felt aerogel wet material is formed in an alkaline atmosphere, and after aging and surface modification, supercritical fluid CO is adopted2Drying to obtain the reinforced aerogel material. Similar technical disclosure, ZL 201410779326.9 discloses a high-efficiency heat-insulating aerogel composite board and a preparation method thereof, wherein the high-efficiency heat-insulating aerogel composite board is prepared by adding fibrofelt into ethyl orthosilicate sol to form gel, aging the gel by adopting an alcohol solvent and then drying the gel by utilizing a supercritical fluid drying technologyThe aerogel composite board with the thermal conductivity lower than 0.05W/(m.K) is prepared, and compared with an aerogel block, the processability and the applicability are improved.
With the wide application and the increasing demand of the composite aerogel thermal insulation material, the problem of high manufacturing cost is also concerned. As previously disclosed, the introduction of supercritical drying technology is an important step in the production of aerogel insulation blankets or composite panels. Supercritical fluid drying is a mature technology in the field of aerogel preparation, and the introduction of the technology solves the problem of collapse of aerogel under common drying conditions due to capillary force, so that a hollow structure in the aerogel is ensured, and the technology also becomes an indispensable process link in the production of composite aerogel materials.
Currently, in an industrialized preparation technology, a composite process of a fiber raw material and aerogel generally includes that aerogel glue solution is absorbed by the fiber raw material in a spraying mode and the like, and the composite thermal insulation material is obtained through drying, or the fiber raw material is combined with a sol precursor for preparing aerogel, and the formed gel is further dried, so that most of raw materials for preparing aerogel also select organic silicon (such as silicate organic silicon) for obtaining products with high thermal insulation and processability, and the high cost of the raw materials is also one of the limiting factors.
By adopting the carbon dioxide supercritical method, the industrial investment is large, the entrance and large-scale development of production enterprises are restricted, the organosilicon raw material with high price is adopted, and the production cost is further improved.
On the other hand, the bonding strength between the aerogel and the fiber raw material is also an important factor influencing the application effect and the service life of the composite thermal insulation material, and the aerogel and the fiber raw material maintain excellent bonding performance no matter in the later processing or the application process while the thermal insulation performance of the material is ensured, and the bonding strength is also an important index for evaluating the performance of the thermal insulation material (such as a thermal insulation felt).
Disclosure of Invention
The invention provides a silicon aerogel composite thermal insulation material and a preparation method thereof, which not only solve the technical problem of high production cost in the prior art, but also solve the technical problems of low bonding strength and easy cracking of the thermal insulation material.
The invention provides a preparation method of a silica aerogel composite thermal insulation material, which comprises the following steps:
keeping stirring a mixed system of a silica sol solution with the concentration of 20-30% and a silane cross-linking agent, and adjusting the pH of the mixed system to be alkalescent to prepare a gel precursor, wherein the silane cross-linking agent accounts for 10-20% of the silica sol solution by mass;
soaking the fiber raw material into the gel precursor until the adsorption is saturated, taking out the fiber raw material, and standing the fiber raw material until gel is formed;
placing the fiber raw material with the formed gel in an organic solvent, heating, distilling and removing water until the water content in the collected distillate is lower than 1%;
carrying out surface hydrophobic treatment on the fiber raw material which is subjected to the water removal treatment and is formed with the gel by using a hydrophobizing agent to form a heat-insulating material precursor;
and (3) removing the solvent from the heat-insulating material precursor in vacuum, and keeping the temperature of the heat-insulating material precursor to be 80-90 ℃ for drying, so that the gel becomes the silica aerogel and is integrated with the fiber raw material. In the present invention, drying is generally completed in 4 to 5 hours.
According to the invention, a silica sol solution and a silane crosslinking agent react under specific conditions, so that the silane crosslinking agent is hydrolyzed and crosslinked with the silica sol to prepare a gel precursor, then a fiber raw material is immersed into the gel precursor to form gel, then water is removed in a solvent replacement mode, further hydrophobic treatment is carried out, and finally, vacuumizing and drying are carried out, thus the silica aerogel thermal insulation material with excellent thermal insulation performance and mechanical property is prepared. The silica aerogel composite heat-insulating material provided by the invention has excellent heat-insulating property, and the silica aerogel and the fibers have high bonding strength, are not easy to crack and have better service performance; meanwhile, the preparation method is simple, easy to operate and short in preparation time, and is more beneficial to industrial production; and because inorganic silicon is used as a raw material, the raw material is cheap and easy to obtain, and the drying is carried out by adopting a conventional mode, so that the raw material cost is low, the equipment investment is small, the production cost can be reduced, and the industrial application is facilitated.
In the invention, the silica sol solution can be a commercially available silica sol aqueous solution with a concentration of 20-30%, but the invention is not limited to this, and the silica sol solution can also be obtained by other ways or prepared by related preparation methods.
Different silane cross-linking agents are selected, so that the final performance of the prepared silicon aerogel composite thermal insulation material is also influenced to a certain extent. In the implementation process of the invention, the dealcoholized silane cross-linking agent is selected as the silane cross-linking agent for preparing the gel precursor, and when the gel precursor is prepared, the mixing system of the silica sol solution with the concentration of 20-30% and the selected silane cross-linking agent is kept stirring and is adjusted to pH9.5-10 by ammonia water. In a specific embodiment, the silane crosslinking agent of the present invention may be selected from methyltrimethoxysilane or methyltriethoxysilane.
The fiber raw material as a carrier can effectively solve the brittleness problem of the silica aerogel and further expand the application range of the silica aerogel, the fiber raw materials commonly used in the field can be suitable for the invention, and the fiber raw material with good heat insulation and flame retardant properties can be particularly preferred in the invention. In a specific implementation process, the fiber raw material in the present invention can be selected from aluminum silicate fiber, glass fiber or rock wool, generally, the selected fiber raw material is immersed in a gel precursor, and is allowed to stand at 50-60 ℃ after being saturated by adsorption to form gel, and of course, the temperature for forming gel is different for different fiber raw materials, and thus, the setting of the temperature range can be determined according to the specifically selected fiber raw material and is not limited to 50-60 ℃.
In the invention, generally, a fiber raw material is immersed in a gel precursor, and the adsorption amount of the fiber to the gel is determined not to be increased basically, or the gel liquid amount (gel precursor) for immersing the fiber raw material is determined not to be changed basically (dynamic balance can be understood), so that the fiber raw material is considered to be adsorbed and saturated, and in the specific operation, most fiber raw materials can be taken out after standing for 30-40 minutes until the adsorption saturation is reached, and then the fiber raw materials are kept standing until the gel is formed.
The method comprises the steps of dehydrating a fiber raw material with gel formed by a solvent replacement mode, putting the fiber raw material with gel formed into an organic solvent, distilling to remove water, and heating at a heating rate of 1-2 ℃/min, wherein the organic solvent is selected to be an organic solvent capable of forming an azeotropic point with water. The azeotropic point of the azeotrope formed by the organic solvent and water is lower than 100 ℃, and the organic solvent which can form the azeotropic point with water is selected to be more favorable for evaporating water.
Further, the organic solvent capable of forming an azeotropic point with water includes a lower aliphatic alcohol or a lower ester, for example, the organic solvent may be selected from n-butanol, methanol, ethanol, and the like, but the present invention is not limited thereto.
In the present invention, the dehydration treatment is further performed with a hydrophobization treatment, and in a specific embodiment, the hydrophobization agent in the present invention may be selected from dichlorodimethylsilane or hexamethyldisilazane in an amount of 5 to 10% by mass of the silica in the silica sol solution, and the surface hydrophobization treatment is performed by leaving the silica sol solution at 60 to 70 ℃ for 6 to 8 hours. In the invention, the final performance of the silicon aerogel composite thermal insulation material is ensured more favorably through hydrophobic treatment.
Furthermore, the preparation method also comprises the step of rectifying the distillate collected in the process of distilling and removing water to recover the organic solvent, and the organic solvent is recycled, so that the raw materials are saved, and the cost is further reduced.
In the field of insulation materials, the insulation material is generally processed into various products to be matched with different requirements, and the same point is also applicable to the invention. In a specific implementation, the thermal insulation material of the invention is processed into thermal insulation felt, which can be realized by the following two ways: 1) directly selecting a pre-processed (self-processed or commercially available) heat preservation felt as a fiber raw material to be compounded with the silica sol solution to finally obtain the silica aerogel heat preservation felt; 2) compounding the fiber raw material and the silica sol solution to obtain the silica aerogel composite heat-insulating material, and further processing the silica aerogel composite heat-insulating material into a silica aerogel heat-insulating felt according to the use requirements.
In addition, the invention also provides a silica aerogel heat preservation felt which is prepared by the preparation method.
In an embodiment of the present invention, the preparation method of the silica aerogel composite thermal insulation material further includes:
1. adding a silica sol solution with the concentration of 20-30% into a reaction tank, adding a silane cross-linking agent into the reaction tank at normal temperature, wherein the mass of the added silane cross-linking agent is 10-20% of that of the silica sol solution, stirring for 20-30 minutes under the condition that the stirring speed is 80-100 revolutions per minute, and adjusting the pH value to be alkalescent to obtain a gel precursor;
2. soaking the fiber raw material into the gel precursor, standing for 30-40 min, taking out after saturation, and standing at 50-60 ℃ until gel is formed;
3. putting the fiber raw material with the formed gel into a replacement kettle, adding an organic solvent, heating at the heating rate of 1-2 ℃/min, distilling to remove water, stopping distillation when the water content in the distilled solvent is less than 1%, and rectifying and recycling the distilled organic solvent;
4. adding a hydrophobizing agent into the fiber raw material which is subjected to water removal treatment and forms the gel at the temperature of 60-70 ℃, wherein the adding amount is 5-10% of the mass of silicon dioxide in the silica sol solution, and standing for 6-8 hours;
5. and (3) vacuumizing the replacement kettle by using a vacuum pump, keeping the temperature at 80-90 ℃, keeping the drying time for 4-5 hours, and condensing and recycling the extracted solvent gas to enable the gel to become the silica aerogel and integrate the silica aerogel with the fiber raw material to obtain the silica aerogel composite heat-insulating material.
Compared with the prior art, the invention has the following beneficial effects:
the preparation process is simple, a supercritical drying technology is not required, the production investment is low, and the industrial application is facilitated;
the inorganic silicon (silica sol) is adopted as a raw material, is cheap and easy to obtain, further reduces the production cost, and is combined with the preparation process to prepare the silica aerogel composite heat-insulating material with excellent heat-insulating property and mechanical property;
the invention prepares a silicon aerogel composite thermal insulation material different from the prior art by improving the preparation process, and the silicon aerogel is directly formed on the fiber raw material, has high bonding strength, is not easy to crack and has better service performance.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the following examples, the bond strength of silica aerogel and fiber raw material was measured by sand blast impact method using a stepless variable speed blower with an air flow rate of 0-0.1m3And/min, the abrasive used for sand blasting is silicon nitride abrasive, and the size of the silicon nitride abrasive is 70-90 microns.
Preparation of silica aerogel heat-insulating felt material
Example 1
(1) Synthesizing a gel precursor: adding 1000g of silica sol solution with the concentration of 20% into a reaction tank, adding 200g of methyltrimethoxysilane into the reaction tank at normal temperature, stirring at the speed of 80 rpm for 20 minutes, and adjusting the pH to 9.8 by using ammonia water;
(2) dipping: immersing an aluminum silicate heat-preservation felt into the gel precursor prepared in the step (1), standing for 35 minutes, taking out after saturation, and standing at 50 ℃ until gel is formed;
(3) solvent replacement: putting the aluminum silicate heat-preservation felt after the gel in the step (2) into a replacement kettle, adding n-butyl alcohol, heating at the heating rate of 2 ℃/minute, distilling and dehydrating until the moisture content in the distilled liquid is 0.8%, and stopping distillation;
(4) hydrophobization treatment: at 70 ℃, 10g of dichlorodimethylsilane is added in the step (3), and the mixture is kept stand for 8 hours;
(5) and (3) drying: vacuum-pumping and drying by a vacuum pump, simultaneously keeping the temperature at 90 ℃, keeping the drying time for 4-5 hours, and condensing and recycling the pumped solvent gas.
The silica aerogel thermal insulation felt material is obtained through the steps.
Example 2
(1) Synthesizing a gel precursor: adding 1000g of 25% silica sol solution into a reaction tank, adding 200g of methyltriethoxysilane into the reaction tank at normal temperature, stirring at the speed of 80 revolutions per minute for 20 minutes, and adjusting the pH value to 9.5 by using ammonia water;
(2) dipping: soaking a glass fiber heat-insulating felt into the gel precursor prepared in the step (1), standing for 30 minutes, taking out after saturation, and standing at 60 ℃ until gel is formed;
(3) solvent replacement: putting the glass fiber heat-insulating felt gelled in the step (2) into a replacement kettle, adding ethanol, heating at the heating rate of 1.5 ℃/min, distilling and dehydrating, rectifying and recycling the distilled ethanol until the water content in the distilled distillate is 0.5%, and stopping distillation;
(4) hydrophobization treatment: adding 20g of dichlorodimethylsilane in the step (3) at 65 ℃, and standing for 7 hours;
(5) and (3) drying: vacuum-pumping and drying by a vacuum pump, simultaneously keeping the temperature at 85 ℃, keeping the drying time for 5 hours, and condensing and recycling the pumped solvent gas.
The silica aerogel thermal insulation felt material is obtained through the steps.
Example 3
(1) Synthesizing a gel precursor: adding 1000g of silica sol solution with the concentration of 30% into a reaction tank, adding 100g of methyltrimethoxysilane into the reaction tank at normal temperature, stirring at the speed of 100 revolutions per minute for 20 minutes, and adjusting the pH value to 9.5 by using ammonia water;
(2) dipping: immersing the rock wool heat-preservation felt into the gel precursor prepared in the step (1), standing for 40 minutes, taking out after saturation, and standing at 50 ℃ until gel is formed;
(3) solvent replacement: putting the rock wool heat-preservation felt gelled in the step (2) into a replacement kettle, adding methanol, heating at the heating rate of 1 ℃/min, performing constant boiling point distillation and dehydration until the water content in the distilled distillate is 1%, and stopping distillation;
(4) hydrophobization treatment: adding 15g of hexamethyldisilazane in the step (3) at 60 ℃, and standing for 6 hours;
(5) and (3) drying: vacuum-pumping and drying by a vacuum pump, keeping the temperature at 80 ℃, keeping the drying time for 4 hours, and condensing and recycling the pumped solvent gas.
The silica aerogel thermal insulation felt material is obtained through the steps.
Second, performance detection
1) Determination of thermal conductivity
The thermal conductivity of the silica aerogel thermal insulation blankets prepared in examples 1, 2 and 3 were measured according to national standards for GB/T10295-.
2) Determination of the bond Strength
And (3) determining the retention rate of the silicon aerogel by adopting a sand blasting impact method, and reflecting the bonding strength of the silicon aerogel thermal insulation material through the retention rate of the silicon aerogel.
The determination principle is as follows: and spraying the silicon nitride abrasive to the silicon aerogel thermal insulation material by using a stepless speed change air blower, namely performing sand blasting treatment on the silicon aerogel thermal insulation material, wherein the silicon aerogel thermal insulation material is subjected to certain impact force, so that part of silicon aerogel is separated from the silicon aerogel thermal insulation material. And the silicon nitride abrasive with the particle size of 70-90 microns is adopted in the sand blasting process, the force of impact force is large, and the silicon nitride abrasive cannot be left on the silicon aerogel thermal insulation material, so that the calculation result of the ratio of the weight of the silicon aerogel thermal insulation material after sand blasting to the weight of the silicon aerogel thermal insulation material before sand blasting is used as the silicon aerogel retention rate, and the bonding strength of silicon aerogel and fiber raw materials in the silicon aerogel thermal insulation material is reflected through the silicon aerogel retention rate, namely: the higher the retention rate of the silica aerogel is, the larger the weight of the silica aerogel thermal insulation material after sand blasting treatment is, the less the silica aerogel is removed in the sand blasting treatment process, and the higher the bonding strength of the silica aerogel and the fiber raw material is reflected; and vice versa.
The calculation formula of the silica aerogel retention rate is as follows:
and (3) measuring a sample: the silica aerogel thermal blankets prepared in examples 1, 2 and 3, and the control sample, wherein the control sample is a commercially available silica aerogel thermal blanket.
The determination method comprises the following steps: shearing a square silicon aerogel heat-preservation felt with the side length of 5cm, weighing the weight (the weight before sand blasting) of the square silicon aerogel heat-preservation felt, fixing the square silicon aerogel heat-preservation felt on a workbench, starting an infinitely variable speed blower, adjusting the sand blasting amount to spray 44 +/-0.1 g of silicon nitride abrasive material per minute, and performing sand blasting on the square silicon aerogel heat-preservation felt; after 5 minutes of blasting, the blasting was stopped, and the blasted silica aerogel insulation blanket was weighed (weight after blasting), the silica aerogel retention rate was calculated by the above calculation formula, and the results are recorded in table 1.
TABLE 1
| Silica aerogel Retention% | Coefficient of thermal conductivity | |
| Example 1 | 86 | 0.015 |
| Example 2 | 88 | 0.016 |
| Example 3 | 86.5 | 0.014 |
| Control sample | 80 |
As can be seen from the result data in table 1, the silica aerogel thermal insulation blankets prepared in examples 1, 2 and 3 all have lower thermal conductivity, and it can be further proved that the silica aerogel thermal insulation blankets prepared by the method of the present invention have excellent thermal insulation performance; compared with commercially available silica aerogel heat preservation felts (control samples), the silica aerogel retention rate of the silica aerogel heat preservation felts prepared in the embodiments 1, 2 and 3 is greatly improved, so that the silica aerogel heat preservation felts have higher bonding strength, and the silica aerogel heat preservation felts prepared by the method provided by the invention have high bonding strength.
Claims (10)
1. A preparation method of a silicon aerogel composite thermal insulation material comprises the following steps:
keeping stirring a mixed system of a silica sol solution with the concentration of 20-30% and a silane cross-linking agent, and adjusting the pH of the mixed system to be alkalescent to prepare a gel precursor, wherein the silane cross-linking agent accounts for 10-20% of the silica sol solution by mass;
soaking the fiber raw material into the gel precursor until the adsorption is saturated, taking out the fiber raw material, and standing the fiber raw material until gel is formed;
placing the fiber raw material with the formed gel in an organic solvent, heating, distilling and removing water until the water content in the collected distillate is lower than 1%;
carrying out surface hydrophobic treatment on the fiber raw material which is subjected to the water removal treatment and is formed with the gel by using a hydrophobizing agent to form a heat-insulating material precursor;
and (3) removing the solvent from the heat-insulating material precursor in vacuum, and drying at the temperature of 80-90 ℃ to enable the gel to become silicon aerogel and be combined with the fiber raw material into a whole.
2. The method according to claim 1, wherein the silane crosslinking agent used for preparing the gel precursor is a dealcoholized silane crosslinking agent, the adjustment is performed using ammonia water, and the weak base is at pH9.5 to 10.
3. The method of claim 2, wherein the silane cross-linking agent is selected from methyltrimethoxysilane or methyltriethoxysilane.
4. The method according to claim 1, wherein the fiber material is selected from the group consisting of aluminum silicate fiber, glass fiber, and rock wool, and the gel is formed by allowing the fiber material to stand at 50 to 60 ℃ after the fiber material is saturated with the gel precursor.
5. The production method according to claim 1, wherein the fiber raw material having the gel formed thereon is placed in an organic solvent to be distilled off to remove water, the organic solvent capable of forming an azeotropic point with water is selected, and the temperature is controlled to be raised at a temperature raising rate of 1 to 2 ℃/min.
6. The production method according to claim 5, wherein the organic solvent capable of forming an azeotropic point with water comprises a lower aliphatic alcohol or a lower ester.
7. The production method according to claim 1, wherein the hydrophobizing agent used in the surface hydrophobizing treatment comprises dichlorodimethylsilane or hexamethyldisilazane and is used in an amount of 5 to 10% by mass of the silica in the silica sol solution, and the surface hydrophobizing treatment is standing at 60 to 70 ℃ for 6 to 8 hours.
8. The method according to claim 1 or 5, further comprising rectifying the distillate collected in the process of distilling to remove water to recover the organic solvent.
9. The preparation method according to claim 1 or 4, wherein the fiber raw material is a heat-insulating felt, and the silica aerogel composite heat-insulating material is a silica aerogel heat-insulating felt.
10. A silica aerogel insulation blanket prepared by the method of any of claims 1-9.
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| US20040033882A1 (en) * | 2002-08-16 | 2004-02-19 | The Boeing Company | Hybrid aerogel rigid ceramic fiber insulation and method of producing same |
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| CN105645921A (en) * | 2016-03-10 | 2016-06-08 | 深圳中凝科技有限公司 | Method for preparing composite SiO2 aerogel felt |
| CN108314411A (en) * | 2018-01-03 | 2018-07-24 | 深圳中凝科技有限公司 | The method that silicon dioxide silica aerogel composite material is prepared without alcohol technique using no chlorine |
| CN108821741A (en) * | 2018-07-27 | 2018-11-16 | 徐渊 | A kind of preparation method of aerogel blanket |
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- 2018-09-27 CN CN201811134289.0A patent/CN110950629A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040033882A1 (en) * | 2002-08-16 | 2004-02-19 | The Boeing Company | Hybrid aerogel rigid ceramic fiber insulation and method of producing same |
| CN105198375A (en) * | 2015-09-18 | 2015-12-30 | 四川鑫炬矿业资源开发股份有限公司 | Thermal insulation silicon dioxide aerogel/hydroxylation glass fiber felt composite and preparation method thereof |
| CN105645921A (en) * | 2016-03-10 | 2016-06-08 | 深圳中凝科技有限公司 | Method for preparing composite SiO2 aerogel felt |
| CN108314411A (en) * | 2018-01-03 | 2018-07-24 | 深圳中凝科技有限公司 | The method that silicon dioxide silica aerogel composite material is prepared without alcohol technique using no chlorine |
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Application publication date: 20200403 |