WO2021066482A1 - 실리카 졸, 이를 이용하여 제조한 실리카 에어로겔 블랭킷 및 그 제조방법 - Google Patents
실리카 졸, 이를 이용하여 제조한 실리카 에어로겔 블랭킷 및 그 제조방법 Download PDFInfo
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- WO2021066482A1 WO2021066482A1 PCT/KR2020/013269 KR2020013269W WO2021066482A1 WO 2021066482 A1 WO2021066482 A1 WO 2021066482A1 KR 2020013269 W KR2020013269 W KR 2020013269W WO 2021066482 A1 WO2021066482 A1 WO 2021066482A1
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- blanket
- silica sol
- ortho silicate
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B33/00—Silicon; Compounds thereof
- C01B33/113—Silicon oxides; Hydrates thereof
- C01B33/12—Silica; Hydrates thereof, e.g. lepidoic silicic acid
- C01B33/14—Colloidal silica, e.g. dispersions, gels, sols
- C01B33/157—After-treatment of gels
- C01B33/159—Coating or hydrophobisation
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B33/00—Silicon; Compounds thereof
- C01B33/113—Silicon oxides; Hydrates thereof
- C01B33/12—Silica; Hydrates thereof, e.g. lepidoic silicic acid
- C01B33/14—Colloidal silica, e.g. dispersions, gels, sols
- C01B33/155—Preparation of hydroorganogels or organogels
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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
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B33/00—Silicon; Compounds thereof
- C01B33/113—Silicon oxides; Hydrates thereof
- C01B33/12—Silica; Hydrates thereof, e.g. lepidoic silicic acid
- C01B33/14—Colloidal silica, e.g. dispersions, gels, sols
- C01B33/145—Preparation of hydroorganosols, organosols or dispersions in an organic medium
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B33/00—Silicon; Compounds thereof
- C01B33/113—Silicon oxides; Hydrates thereof
- C01B33/12—Silica; Hydrates thereof, e.g. lepidoic silicic acid
- C01B33/14—Colloidal silica, e.g. dispersions, gels, sols
- C01B33/157—After-treatment of gels
- C01B33/158—Purification; Drying; Dehydrating
- C01B33/1585—Dehydration into aerogels
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L59/00—Thermal insulation in general
- F16L59/02—Shape or form of insulating materials, with or without coverings integral with the insulating materials
- F16L59/026—Mattresses, mats, blankets or the like
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L59/00—Thermal insulation in general
- F16L59/02—Shape or form of insulating materials, with or without coverings integral with the insulating materials
- F16L59/028—Composition or method of fixing a thermally insulating material
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/01—Particle morphology depicted by an image
- C01P2004/03—Particle morphology depicted by an image obtained by SEM
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/60—Particles characterised by their size
- C01P2004/61—Micrometer sized, i.e. from 1-100 micrometer
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/32—Thermal properties
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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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/30—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values
- C04B2201/32—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values for the thermal conductivity, e.g. K-factors
-
- 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/13—Energy storage using capacitors
Definitions
- a silica airgel blanket having excellent hydrophobicity can be manufactured by using a silica sol containing a hydrophobic agent and water in a catalyst composition, simplifying the manufacturing process of the airgel blanket, and increasing the reuse efficiency of waste liquid generated after manufacturing. It relates to a method of manufacturing a silica airgel blanket.
- Aerogel is an ultra-porous, high specific surface area ( ⁇ 500 m 2 /g) material with a porosity of about 90 to 99.9% and a pore size in the range of 1 to 100 nm. Since it is a material having an airgel material, as well as research on the development of an airgel material, application research as an environmentally friendly high temperature insulation material, ultra-low dielectric thin film for highly integrated devices, catalysts and catalyst carriers, electrodes for supercapacitors, and electrode materials for seawater desalination are also actively progressing.
- airgel is super-insulation, which has a thermal conductivity of 0.300 W/mK or less, which is lower than that of organic insulation materials such as styrofoam, and it can solve the fire vulnerability, which is the fatal weakness of organic insulation materials, and the generation of harmful gases in case of fire. Is that there is.
- airgels are manufactured by preparing a hydrogel from silica precursors such as water glass and alkoxysilane series (TEOS, TMOS, MTMS, etc.), and removing liquid components inside the hydrogel without destroying the microstructure.
- silica precursors such as water glass and alkoxysilane series (TEOS, TMOS, MTMS, etc.
- a hydrophobic silica airgel blanket in which a hydrophobic silica aerogel is formed in a fiber is widely used in construction or industrial sites as a functional insulating material that prevents corrosion by moisture, and such a hydrophobic silica aerogel blanket is generally used at the stage of preparing a silica sol solution, It is produced through a gelling step, a aging step, a surface modification step, and a drying step.
- the surface modification step uses a large amount of organic solvent and an expensive surface modifier, and the process is complicated and requires a long process time, resulting in poor economy and productivity.
- the ammonia generated when the surface of the airgel is reformed reacts with carbon dioxide used in the supercritical stage to form ammonium carbonate salts, causing problems such as blocking the piping of the supercritical drying equipment, thereby hindering the efficiency of the process.
- a large amount of ammonia was present in the waste solution generated after drying, it was impossible to immediately reuse the waste solution. In order to reuse the waste solution, it took a long time in the purification process and the purification cost was increased.
- the aging step which is the step of strengthening the structure of the airgel, is also effective when wet aging is performed in the presence of a base catalyst solution such as ammonia/ethanol.
- a base catalyst solution such as ammonia/ethanol.
- the inventors of the present invention have been studying a method for manufacturing a silica airgel blanket having a solid structure that exhibits hydrophobicity even if the surface modification step is omitted and wet aging is not performed, while solving the problems of the conventional wet aging step and the surface modification step.
- a method of manufacturing a silica airgel blanket that can be solved was developed.
- Patent Document 1 KR10-1147494B1
- the present invention was conceived to solve the problems of the prior art, and the problem to be solved of the present invention is wet aging that increases the amount of solvent used by being carried out in the presence of a base catalyst and an organic solvent when manufacturing a silica airgel blanket. ) Step and a large amount of organic solvent and expensive surface modifier, and the process is complicated and requires a long process time, so that the surface modification step that hinders economy and productivity can be omitted, and a silica aerogel blanket using the same It is to provide a method of manufacturing.
- the present invention can reduce energy consumption by omitting the wet aging step and the surface modification step, which can proceed at high temperature, and by omitting the above step, a simplified manufacturing facility can be used since the aging solution supply facility and the surface modification supply facility are not required. It is to provide a silica sol and a method of manufacturing a silica airgel blanket using the same.
- Another problem to be solved of the present invention is to significantly reduce the ammonium carbonate salt generated during supercritical drying by ammonia generated when the surface of the silica airgel blanket is modified by the surface modifier and the ammonia remaining after it is used during wet aging. It is to provide a silica sol capable of suppressing and a method of manufacturing a silica airgel blanket using the same.
- Another problem to be solved of the present invention is silica which can efficiently reuse waste liquid by reducing the amount of ammonia in the waste liquid remaining after drying, and reduce the amount of loss of solvent and hydrophobic agent by improving the reuse rate of waste liquid. It is to provide a method of manufacturing an airgel blanket.
- Another problem to be solved by the present invention is to provide a method of manufacturing a silica airgel blanket that can easily control the gelation time by adjusting the amount of the base catalyst in the catalyst composition.
- Another problem to be solved by the present invention is to provide a silica airgel blanket having excellent hydrophobicity inside the silica aerogel blanket and having excellent cross-sectional water repellency of the blanket.
- the present invention is to solve the above problems, including a silica precursor composition and a catalyst composition
- the catalyst composition is a hydrophobic agent
- a base catalyst It includes water and an organic solvent
- the base catalyst provides a silica sol containing 0.4 parts by weight to 1.0 parts by weight based on 100 parts by weight of the silica sol.
- the present invention provides a silica sol containing 3 to 8 equivalents of water in the catalyst composition based on 1 equivalent of a hydrophobic agent.
- a blanket substrate ; And a silica airgel formed on the inside and the surface of the blanket substrate, and a silica airgel blanket having a cross-sectional water repellency of 0 wt% to 7 wt%.
- the silica sol according to the present invention includes a base catalyst, an organic solvent, a hydrophobic agent, and water in the catalyst composition, but when preparing a silica airgel blanket by controlling the content of the base catalyst, it is performed in the presence of a base catalyst component and a large amount of organic solvent.
- the wet aging step which increases the amount of solvent used, and a large amount of organic solvent and expensive surface modifier are used, and the process is complicated and requires a long process time, so that the surface modification step that hinders economy and productivity can be omitted. There is an effect that can be simplified.
- the present invention can reduce energy consumption by omitting the wet aging step and the surface modification step, which can proceed at high temperature, and by omitting the above step, a simplified manufacturing facility can be used since the aging solution supply facility and the surface modification supply facility are not required. .
- the method of manufacturing a silica airgel blanket according to the present invention does not perform wet aging in the presence of a base catalyst solution, and dry aging can be performed in the step of standing without a solvent.
- Ammonium carbonate generated during supercritical drying as it has the effect of reducing the amount of use and can greatly reduce the amount of ammonia generated when the surface of the silica airgel blanket is modified by the ammonia and surface modifier remaining after being used in the aging step. Salt can be significantly suppressed.
- the waste liquid can be efficiently reused, and the amount of loss of the solvent and the hydrophobic agent can be reduced as the reuse rate of the waste liquid is improved.
- the gelation time can be easily adjusted by controlling the amount of the base catalyst in the catalyst composition, and the hydrophobicity inside the manufactured silica airgel blanket is excellent, so that the cross-sectional water repellency of the blanket is excellent.
- Silica aerogel blankets which are widely used as insulation materials in construction or industrial sites, have a drawback that if the surface is not hydrophobicized, it absorbs water in the air due to the hydrophilicity of the silanol group (Si-OH) on the silica surface, and the thermal conductivity gradually increases. In the drying process, it is difficult to expect a spring back phenomenon due to the deepening of pores in the drying process, so that it is difficult to manufacture an ultra-insulating product having meso pores.
- the present invention eliminates the aging step and surface modification step when manufacturing a silica airgel blanket in order to save process time and cost, reduce the occurrence of salts that cause problems in the drying device during supercritical drying, and increase productivity by efficient reuse of waste liquid. It provides a silica sol to be able to, a silica airgel blanket manufactured using the same, and a method for manufacturing the same.
- the silica sol according to an embodiment of the present invention includes a silica precursor composition and a catalyst composition
- the catalyst composition includes a hydrophobic agent, a base catalyst, water and an organic solvent
- the base catalyst is based on 100 parts by weight of the silica sol. It is characterized in that it contains 0.4 parts by weight to 1.0 parts by weight.
- the silica sol may be a precursor capable of finally producing a silica airgel through a gelation reaction, and may be prepared by mixing a silica precursor composition and a catalyst composition.
- the silica precursor composition according to an embodiment of the present invention may include a silica precursor, an organic solvent, and water.
- the silica precursor included in the silica precursor composition is a material that enables the airgel to be prepared to contain silica, for example, tetramethyl ortho silicate (TMOS), tetraethyl ortho silicate (tetra ethyl ortho silicate).
- TMOS tetramethyl ortho silicate
- tetraethyl ortho silicate tetra ethyl ortho silicate
- silicate TEOS
- methyl triethyl ortho silicate dimethyl diethyl ortho silicate, tetra propyl ortho silicate, tetraisopropyl ortho silicate ( tetra isopropyl ortho silicate), tetra butyl ortho silicate, tetra secondarybutyl ortho silicate, tetra tertiarybutyl ortho silicate, tetrahexyl ortho silicate (tetr ahexyl ortho silicate), tetracyclohexyl ortho silicate, and tetra dodecyl ortho silicate. (prehydrolysate) may be used. In the case of using a prehydrolyzed product, addition of an acid is unnecessary, the hydrolysis process of the silica precursor can be shortened or omitted, and the surface modification effect can be promoted.
- the silica precursor may be a prehydrolyzed polyethyl silicate.
- HTEOS is a prehydrolyzed ethyl polysilicate oligomer material having a wide molecular weight distribution, and the degree of prehydrolysis (degree of hydration) is varied to control physical properties such as gelation time when synthesizing from TEOS monomers in oligomer form. Because it can be applied, it can be easily applied according to the reaction conditions of the user. In addition, it has the advantage of creating reproducible physical properties of the final result.
- the silica precursor may be used in an amount such that the content of silica contained in the silica sol is 0.1 to 30%, but is not limited thereto.
- the content of the silica satisfies the above range, it is preferable in terms of having an improved thermal insulation effect while securing the mechanical properties of the airgel blanket, particularly flexibility, to an excellent level.
- the organic solvent may be specifically an alcohol, wherein the alcohol is a monohydric alcohol such as methanol, ethanol, isopropanol, butanol, and the like; Alternatively, it may be a polyhydric alcohol such as glycerol, ethylene glycol, propylene glycol, diethylene glycol, dipropylene glycol, and sorbitol, and any one or a mixture of two or more of them may be used. Among these, in consideration of miscibility with water and airgel, it may be a monohydric alcohol having 1 to 6 carbon atoms such as methanol, ethanol, isopropanol, butanol, etc., such as ethanol.
- the alcohol (organic solvent) and water as described above can be used in an appropriate amount by a person skilled in the art in consideration of the degree of hydrophobicity in the finally produced airgel while accelerating the surface modification reaction.
- the catalyst composition according to an embodiment of the present invention includes a hydrophobic agent, a base catalyst, water and an organic solvent, and the base catalyst is characterized in that 0.4 parts by weight to 1.0 parts by weight based on 100 parts by weight of the silica sol are included.
- the catalyst composition of the present invention can activate the hydrophobic agent contained in the catalyst composition by including water together with the hydrophobic agent in the composition, and as the hydrophobic agent is activated, the aging and surface modification solution is not used. Modification can be carried out.
- activation of the hydrophobic agent may mean that a hydrolysis reaction is performed on a functional group other than an alkyl group of the hydrophobic agent, such as an alkoxy group or a halogen group, thereby forming a hydroxyl group (-OH) at the functional group position.
- the hydrophobic agent When the hydrophobic agent is activated, the reactivity with the -Si-O- functional group forming the network structure in the silica wet gel can be greatly increased.Therefore, the hydrophobic agent and the silica wet gel react without an additional catalyst and solvent to strengthen the structure and surface. Modification can take place.
- the gelation time may be different as time elapses after the preparation of the silica precursor, and thus it may be difficult to apply it in a continuous airgel blanket manufacturing process.
- raw materials may be stored in a state in which the silica precursor composition and the catalyst composition are respectively stored in a storage tank, and the compositions are sprayed onto the blanket substrate on the conveyor belt. It is possible to perform gelation while moving the conveyor belt.
- the gelation time is different depending on the residence time of the silica precursor composition in the storage tank, there may be a problem that gelation does not proceed partially in the wet gel blanket to be prepared. Even when all the conveyor belts for gelling are moved and the wet gel blanket is wound in a roll form, there may be a part where gelation does not occur, and thus it may be difficult to manufacture a normal airgel blanket. In addition, since the wet gel blanket prepared above cannot undergo surface modification when dry aging is performed, shrinkage may occur during drying, and a problem of not forming a hydrophobic airgel blanket may occur.
- the hydrophobic agent may participate in the gelation reaction as a co-precursor, and the formed silica wet gel blanket may be hydrophobized.
- the alkyl silane compound is gelled with the silica precursor in the gelation step, or the alkyl silane compound contained in the gel undergoes aging and surface modification in the standing step to form an alkyl-Si-O-Si networking to hydrophobize the silica wet gel blanket.
- the surface modification step can be omitted. As a result, it is possible to reduce the amount of the organic solvent and the surface modifier used in the surface modification step, and reduce the process time and manufacturing cost.
- the amount of ammonia generated when the surface of the silica wet gel is modified can be greatly reduced, so that the efficiency of reuse of the waste liquid generated after the manufacture of the silica airgel blanket can be increased. Since it can be included in the sol, the amount of the hydrophobic agent used can be greatly reduced even by reuse.
- the hydrophobic agent may specifically be an alkyl silane compound as described above, and if it is an alkyl silane compound containing an alkyl group inducing hydrophobicization and a silane functional group capable of reacting with the -Si-O-functional group of the wet gel Is not limited, but more specifically trimethylethoxysilane (TMES), trimethylsilanol (TMS), trimethylchlorosilane (TMCS), methyltrimethoxysilane (MTMS), methyltriethoxysilane It may include at least one selected from the group consisting of (MTES), dimethyldiethoxysilane (DMDEOS), ethyltriethoxysilane, and phenyltriethoxysilane.
- TMES trimethylethoxysilane
- TMS trimethylsilanol
- TMCS trimethylchlorosilane
- MTMS methyltrimethoxysilane
- MTES dimethyldiethoxys
- the hydrophobic agent does not contain a silazane-based compound such as hexamethyldisilazane.
- a silazane-based compound such as hexamethyldisilazane.
- the silazane-based compound may start to decompose when contacted with an organic solvent to generate ammonia, so that a high pH due to the generation of ammonia is formed immediately upon introduction into the catalyst composition containing an organic solvent. The gelling reaction can proceed immediately. Therefore, it is preferable not to include a silazane-based compound from the viewpoint of preventing unexpected gelation reaction and easily controlling the gelation time by changing the amount of catalyst.
- the hydrophobic agent may include 3 to 15 parts by weight, specifically 5 to 10 parts by weight, and more specifically 6 to 8 parts by weight, based on 100 parts by weight of the silica sol.
- the hydrophobicization efficiency surface modification efficiency
- the catalyst composition according to an embodiment of the present invention may include 1 to 12 equivalents of water based on 1 equivalent of the hydrophobic agent.
- the water may contain 1 to 12 equivalents, 2 to 10 equivalents, 3 to 8 equivalents, 4 to 8 equivalents, more preferably 5 to 6 equivalents based on 1 equivalent of the hydrophobic agent. .
- the hydrophobic agent When the water contains 3 equivalents or more based on 1 equivalent of the hydrophobic agent, the hydrophobic agent can be sufficiently activated, so that the structure reinforcement and surface modification of the wet gel can easily proceed without an additional catalyst, a surface modifier, and a solvent. It is preferable because a silica airgel blanket having excellent hydrophobicity can be produced without performing a separate surface modification process and wet aging requiring a temperature condition of and a large amount of an organic solvent and a surface modifier. In addition, when the water is contained in an amount of 8 equivalents or less based on 1 equivalent of the hydrophobic agent, the amount of water in the wet gel blanket can be controlled, and accordingly, water is effectively removed during the supercritical drying process to prevent contraction of the airgel by water. As it can be suppressed, thermal conductivity and hydrophobicity can be further improved.
- the base catalyst may include 0.4 parts by weight to 1.0 parts by weight based on 100 parts by weight of the total silica sol based on 100 parts by weight of the catalyst composition, specifically 0.6 parts by weight to 1.0 parts by weight, more specifically 0.6 parts by weight To 0.8 parts by weight may be included. If the base catalyst is contained in an amount of less than 0.4 parts by weight, the reactivity between the hydrophobic agent and the silica gel surface may be weak in the process of standing in step 3), which may cause a problem in that surface modification is not performed. Since the gelation rate is too fast, it is difficult to prepare a uniform gel, and there may be a problem of deterioration of physical properties due to the formation of a non-uniform gel.
- the base catalyst according to an embodiment of the present invention may be used without limitation as long as it is a material capable of forming a pH condition so that gelation can be performed, and examples thereof include inorganic bases such as sodium hydroxide and potassium hydroxide; Or an organic base such as ammonium hydroxide.
- the organic base is ammonium hydroxide (NH 4 OH), tetramethylammonium hydroxide (TMAH), tetraethylammonium hydroxide (TEAH), tetrapropylammonium hydroxide (TPAH), tetrabutylammonium hydroxide.
- TMAH tetramethylammonium hydroxide
- TEAH tetraethylammonium hydroxide
- TPAH tetrapropylammonium hydroxide
- tetrabutylammonium hydroxide tetrabutylammonium hydroxide.
- the base catalyst may be ammonium hydroxide (aqueous ammonia; NH 4 OH).
- the organic solvent according to an embodiment of the present invention is as described above, and the amount of the organic solvent may be appropriately adjusted in consideration of compatibility with water and a wet gel, structural reinforcement, and ease of surface modification.
- the catalyst composition may be included in an amount such that the pH of the silica sol is 4 to 8.
- the pH of the silica sol is included to satisfy the above range, gelation may be easily performed and may be performed efficiently.
- the catalyst composition is added in the form of a solution in which a base catalyst is diluted in water and an organic solvent, it is possible to prevent a problem in which the catalyst is deposited.
- a method of manufacturing a hydrophobic silica airgel comprises the steps of: 1) preparing a silica sol; 2) impregnating the silica sol into a substrate for a blanket; And 3) leaving the substrate composite for the silica sol-blanket, wherein the silica sol is the aforementioned silica sol.
- Step 1) is a step of preparing a silica sol, and may be performed by mixing a silica precursor composition and a catalyst composition. At this time, the silica sol, the silica precursor composition, and the catalyst composition are all as described above.
- mixing of the silica precursor composition and the catalyst composition may be performed under conditions of room temperature and pressure.
- step 1) by preparing the silica sol described above in step 1), even if the silica sol-blanket substrate composite is left without an additional base catalyst, a surface modifier, and an organic solvent in step 3) to be described later, gelation, structural reinforcement, and surface modification are possible. It is characterized in that it can be performed.
- Step 2) is a step of forming a silica sol-blanket substrate composite, and may be performed by impregnating the silica sol of step 1) into the blanket substrate.
- impregnation may be achieved by injecting a fluid sol into the blanket substrate, and may refer to the penetration of the sol into pores inside the blanket substrate.
- the substrate for a blanket according to an embodiment of the present invention may be specifically a porous substrate in terms of improving the thermal insulation properties of the silica airgel blanket.
- a porous blanket substrate is used, the silica sol can easily penetrate into the substrate, thereby uniformly forming an aerogel inside the blanket substrate, so that the manufactured silica airgel blanket can have excellent thermal insulation properties.
- the blanket substrate may be a film, a sheet, a net, a fiber, a porous material, a foam, a nonwoven fabric, or a laminate of two or more layers thereof.
- the surface roughness may be formed or patterned on the surface.
- the blanket substrate may be a fiber capable of further improving thermal insulation performance by including a space or void in which the airgel is easily formed in the blanket substrate, and a material having a low thermal conductivity may be used.
- the blanket substrate is polyamide, polybenzimidazole, polyaramid, acrylic resin, phenolic resin, polyester, polyetheretherketone (PEEK), polyolefin (polyethylene, polypropylene, or a copolymer thereof), cellulose, It may be carbon, cotton, wool, hemp, non-woven fabric, glass fiber or ceramic wool.
- Step 3) is a step of leaving the substrate composite for the silica sol-blanket, and gelation, aging, and surface modification may be performed in step 3).
- the present invention is characterized in that by using the silica sol of step 1) described above, aging and surface modification can be easily performed after gelation without using a separate surface modification solution and aging solution (base catalyst and solvent). .
- the amount of solvent and surface modifier can be significantly reduced compared to the conventional silica airgel blanket manufacturing process. Since the amount of ammonia generated in the base catalyst component included in the aging and the surface modification reaction can be remarkably reduced, the amount of ammonia in the waste liquid generated after manufacturing the airgel blanket can be reduced, thereby increasing the reuse efficiency of the waste liquid.
- step 3) may be performed under room temperature or a temperature condition higher than room temperature.
- the room temperature may specifically represent a temperature of 15°C to 30°C, 15°C to 25°C, or 20°C to 25°C.
- the temperature above room temperature may mean a high temperature condition in which gelation, aging, and surface modification of the silica sol-blanket substrate composite can be performed while exceeding the room temperature, specifically 30°C to 100°C, It may represent a temperature of 40 °C to 80 °C, or 50 °C to 70 °C.
- step 3) when step 3) is performed at room temperature, step 3) may be performed for 5 hours to 48 hours, preferably 10 hours to 38 hours, more preferably 15 hours to 24 hours, and the When step 3) is performed under a temperature condition higher than room temperature, step 3) may be performed for 1 hour to 24 hours, preferably 2 hours to 15 hours, more preferably 3 hours to 10 hours.
- the step 3) may be performed under a temperature condition of room temperature or above room temperature to perform gelation, aging, and surface modification of the silica sol-blanket substrate composite, and the execution time may be adjusted according to the temperature condition.
- the temperature condition may be selectively performed in a room temperature condition or a temperature condition higher than room temperature. In this case, when the operation is performed under room temperature conditions, it may take a long time compared to a temperature condition exceeding room temperature, but heat energy for maintaining a temperature exceeding room temperature is not required, so that energy cost can be reduced.
- step 3) when the temperature exceeds room temperature, heat energy for maintaining the temperature exceeds room temperature may be consumed compared to the room temperature condition, but the execution time of step 3) may be shortened. Accordingly, the temperature condition of step 3) may be appropriately selected as necessary, and may be preferably performed under room temperature conditions in terms of saving thermal energy for maintaining a temperature above room temperature.
- the production method of the present invention can easily control the gelation time by adjusting the amount of the base catalyst in the catalyst composition to prepare a silica aerogel of intended physical properties.
- the preferred gelation time can be adjusted to 1 to 25 minutes, specifically 5 to 10 minutes.
- gelation may be to form a network structure from a precursor material, and the network structure is a planar net shape in which a certain polygon having an atomic arrangement of one or more types is connected. It may represent a structure or a structure that forms a three-dimensional skeleton structure by sharing the vertices, edges, and faces of a specific polyhedron.
- a step of drying after step 3) may be further included, and a silica hydrophobic silica airgel may be prepared by drying the silica wet gel blanket.
- the manufacturing method according to an embodiment of the present invention may further perform the step of washing before drying.
- the washing removes impurities (sodium ions, unreacted products, by-products, etc.) generated during the reaction and residual ammonia, which may react with CO 2 during supercritical drying to generate ammonium carbonate, to obtain a high purity hydrophobic silica airgel. It can be carried out by a dilution process or an exchange process using a non-polar organic solvent.
- the drying step according to an embodiment of the present invention may be performed through a process of removing a solvent while maintaining the pore structure of the aged silica gel as it is, and the drying step may be performed by supercritical drying.
- the supercritical drying process may be performed using supercritical carbon dioxide.
- Carbon dioxide (CO 2 ) is in a gaseous state at room temperature and pressure, but when it exceeds the limit of a constant temperature and high pressure called the supercritical point, the evaporation process does not occur, making it impossible to distinguish between gas and liquid, and becomes a critical state. Carbon dioxide in the state is called supercritical carbon dioxide.
- supercritical carbon dioxide Although supercritical carbon dioxide has a molecular density close to that of a liquid, its viscosity is low, it has a property close to that of a gas, has a fast diffusion and has high thermal conductivity, high drying efficiency, and can shorten a drying process time.
- the aged silica gel is put in the supercritical drying reactor, and then liquid CO 2 is filled and the alcohol solvent in the silica aerogel is replaced with CO 2.
- a pressure equal to or higher than the pressure at which carbon dioxide becomes a supercritical state, specifically 100 bar to 170
- the carbon dioxide is maintained for a certain period of time, specifically 20 minutes to 1 hour in a supercritical state.
- carbon dioxide becomes supercritical at a temperature of 31 °C and a pressure of 73.8 bar.
- Carbon dioxide is maintained at a constant temperature and pressure at a supercritical state for 2 to 12 hours, more specifically 2 to 6 hours, and then the pressure is gradually removed to complete the supercritical drying process to manufacture an airgel blanket. I can.
- a blanket including a porous silica airgel and/or a porous silica airgel having nano-sized pores may be manufactured.
- the silica airgel has high hydrophobicity and excellent physical properties, particularly low tap density and high porosity, and the silica airgel-containing blanket including the same has low thermal conductivity and excellent mechanical flexibility.
- a pressing process to adjust the thickness before or after the drying process and to make the internal structure and surface shape of the blanket uniform, a molding process to have an appropriate shape or morphology according to the use, or a lamination process of laminating a separate functional layer And the like may be further performed.
- the present invention provides an airgel blanket having a uniform thermal conductivity and having an overall thermal insulation property greatly improved by forming a uniform thermal conductivity within the blanket.
- the present invention is a blanket substrate; And a silica airgel formed on the inside and the surface of the blanket substrate, and a cross-sectional water repellency of 0.0 wt% to 7.0 wt% provides a silica airgel blanket having excellent hydrophobicity in the blanket.
- the silica airgel blanket may be formed in which a large amount of airgel particles are uniformly formed inside and on the surface of the blanket.
- the cross-sectional water repellency may be specifically 2.5 wt% or less, or 2.0 wt% or less, and may be 0.0 wt% or more, or 0.1 wt% or more. It can be seen that the silica airgel is uniformly formed in the blanket substrate through the low cross-sectional water repellency, and 0 wt% cross-sectional water repellency means that no moisture has penetrated into the cross-section of the silica airgel blanket. .
- the silica airgel blanket may be manufactured by the method of manufacturing the silica airgel blanket described above.
- the thickness of the silica airgel blanket may be appropriately selected by adjusting the thickness of the blanket substrate according to the intended use, and may be specifically 20 mm or less in consideration of ease of handling and storage in a roll form. And, more specifically, it may be 0.1 to 20 mm.
- the cross-sectional water repellency may be a water repellency measured after cutting the manufactured 10 mm thick silica airgel blanket in the thickness direction, and specifically, a silica airgel blanket specimen having a size of 10 mm X 100 mm X 10 mm is used in the thickness direction. It may be the water repellency measured by cutting with. In addition, the water repellency may be measured by the following measurement method. Place the specimen on distilled water at 21 ⁇ 2° C. and set the mesh screen on the specimen to 127 mm below the water surface. After 15 minutes, remove the screen and when the specimen rises, pick up the specimen with a clamp and hang it vertically for 60 ⁇ 5 seconds. Thereafter, the weight before and after impregnation can be measured, and the weight increase rate can be checked and expressed as a water repellency.
- the airgel blanket of the present invention can be usefully used as a thermal insulation material, a thermal insulation material, or a non-combustible material, such as an aircraft, ship, automobile, building structure, as well as a plant facility for thermal insulation such as pipes or industrial furnaces of various industrial facilities.
- the amount in the prepared catalyst composition is 5.12 equivalents of total water based on 1 equivalent of TMES, and the base catalyst is 0.64 parts by weight based on 100 parts by weight of the total sol.
- the prepared silica precursor composition and the catalyst composition were mixed to prepare a silica sol, and the silica sol was impregnated into a fiber (Glass fiber fiber mat, 10 mm) as a substrate for a blanket.
- the fiber composite impregnated with silica sol was left at room temperature for 24 hours to undergo gelation, surface modification, and aging.
- the prepared silica wet gel blanket was placed in a 7.2 L supercritical extractor and CO 2 was injected.
- the temperature in the extractor was raised to 70°C over 1 hour and 20 minutes, and when reaching 70°C and 150 bar, CO 2 was injected and discharged at a rate of 0.5 L/min for 20 minutes, and the injection of CO 2 was stopped for 20 minutes. The process of maintaining was repeated 4 times.
- CO 2 was injected and discharged, ethanol was recovered through the bottom of the separator. Afterwards, CO 2 was vented over 2 hours. After the supercritical drying was completed, it was dried at 150° C. and atmospheric pressure for 1 hour to prepare a silica airgel blanket.
- Example 1 a silica airgel blanket was prepared in the same manner as in Example 1, except that the catalyst composition was mixed so that the total amount of water based on 1 equivalent of TMES in the catalyst composition was 3 equivalents.
- the content of ethanol was also adjusted so that the total content of the catalyst composition was the same, and the base catalyst was 0.64 parts by weight based on 100 parts by weight of the total sol.
- Example 2 In the same manner as in Example 1, except that the catalyst composition was mixed so that the base catalyst was 0.48 parts by weight based on 100 parts by weight of the total sol by adjusting the amount of ammonia water (concentration: 30 wt%) added in Example 1 A silica airgel blanket was prepared.
- Example 1 a silica airgel blanket was prepared in the same manner as in Example 1, except that the catalyst composition was mixed so that the total amount of water based on 1 equivalent of TMES in the catalyst composition was 2.0 equivalents.
- the content of ethanol was also adjusted so that the total content of the catalyst composition was the same, and the base catalyst was 0.64 parts by weight based on 100 parts by weight of the total sol.
- Example 1 a silica airgel blanket was prepared in the same manner as in Example 1, except that the catalyst composition was mixed so that the total amount of water based on 1 equivalent of TMES in the catalyst composition was 10.0 equivalent.
- the content of ethanol was also adjusted so that the total content of the catalyst composition was the same, and the base catalyst was 0.64 parts by weight based on 100 parts by weight of the total sol.
- a silica precursor composition was prepared by adding 31.90 g of prehydrolyzed TEOS (HTEOS), 7.77 g of TMES, 47.28 g of ethanol, and 2.80 g of water as a hydrophobic agent to the reactor and mixing. In addition, 47.28 g of ethanol, 4.22 g of water and 2.75 g of aqueous ammonia (concentration: 30 wt%) were added to another reactor and mixed to prepare a catalyst composition.
- HTEOS prehydrolyzed TEOS
- TMES 47.28 g of ethanol
- 2.80 g of water as a hydrophobic agent
- the reaction solution is a solution consisting of HMDS, TMES, which is a reaction product of ethanol and an acid catalyst, ammonia (NH 3 ) in gas phase, and ethanol.
- HMDS a solution consisting of HMDS, TMES, which is a reaction product of ethanol and an acid catalyst, ammonia (NH 3 ) in gas phase, and ethanol.
- a silica wet gel blanket was prepared under the same conditions as in Example 1, except that the prepared silica sol was used.
- Example 2 In the same manner as in Example 1, except that the catalyst composition was mixed so that the base catalyst was 0.26 parts by weight based on 100 parts by weight of the total sol by adjusting the amount of ammonia water (concentration: 30 wt%) added in Example 1 A silica airgel blanket was prepared.
- Example 2 In the same manner as in Example 1, except that the catalyst composition was mixed so that the base catalyst was 1.1 parts by weight based on 100 parts by weight of the total sol by adjusting the amount of ammonia water (concentration: 30 wt%) added in Example 1 Implemented.
- the gelation rate is too fast, and the gelation has already proceeded before the silica precursor composition and the catalyst composition are uniformly mixed, thereby forming a non-uniform gel.
- HTEOS prehydrolyzed TEOS
- ethanol ethanol
- 11.12 g of water water
- 60.54 g of ethanol and 0.69 g of aqueous ammonia concentration: 30 wt% were added to another reactor and mixed to prepare a catalyst composition.
- the prepared silica precursor and the catalyst composition were mixed to prepare a silica sol, and the silica sol was impregnated into a fiber (Glass fiber fiber mat, 10 mm) as a substrate for a blanket. Gelation was induced for 10 minutes to prepare a silica wet gel blanket.
- the prepared silica wet gel blanket was aged for 1 hour at a temperature of 50° C. using ammonia (NH 3 )/ethanol solution (2.2:97.8 volume ratio). 90% by volume of a hexamethyldisilazane (HMDS)/ethanol solution (5:95 by volume) based on the volume of the wet gel blanket was added to the aged silica wet gel blanket, and then surface modification was performed at a temperature of 70° C. for 4 hours. . Thereafter, supercritical drying and atmospheric drying were performed under the same conditions as in Example 1 to prepare a silica airgel blanket.
- NH 3 ammonia
- HMDS hexamethyldisilazane
- Examples 1 to 5 and Comparative Examples 1 to 3 and Reference Example 1 the time taken for the gelation reaction according to the elapsed time of the silica precursor composition was measured, and the results are shown in Table 1.
- the silica precursor composition was prepared by mixing the catalyst composition with the silica precursor composition 0.5 hours, 1 hour, and 2 hours after the preparation and measuring the gelation time, silica
- Table 1 The difference in gelation time according to the elapsed time after preparation of the precursor composition is shown in Table 1 below.
- Example 1 As shown in Table 1, in Examples 1 to 5, it can be seen that the gelation time is not affected by the residence time of the silica precursor and a constant time is maintained. Maintaining a constant gelation time can serve as a factor that facilitates process control when manufacturing an airgel blanket. However, in Comparative Example 1 in which a hydrophobic agent is included in the silica precursor composition, it can be confirmed that the gelation time varies as the residence time (elapsed time) after preparation of the silica precursor composition is changed. It may cause a problem that is difficult to apply.
- each composition is sprayed onto the blanket substrate on the conveyor belt to form a gel while moving the conveyor belt.
- the gelation time is different depending on the residence time of the silica precursor composition in the storage tank, there may be a problem that gelation does not proceed partially in the wet gel blanket to be prepared.
- the thermal conductivity of the silica airgel blanket prepared in the above Examples and Comparative Examples was measured at room temperature (about 23 ⁇ 3° C.) using the HFM 436 equipment of NETZSCH, and the results are shown in Table 2.
- a 100 mm x 100 mm specimen (thickness: 10 mm) was placed on 21 ⁇ 2° C. distilled water, and the mesh screen was sunk down to 127 mm below the water surface on the specimen. After 15 minutes, remove the screen and when the specimen rises, pick up the specimen with a clamp and hang it vertically for 60 ⁇ 5 seconds. After that, the weight before and after impregnation is measured, and the weight increase rate is checked, and the surface water repellency is expressed. The lower the surface water repellency value is, the better the hydrophobicity of the silica airgel blanket surface is.
- the cross-sectional water repellency was measured in the same manner as the surface water repellency by cutting the 100 mm x 100 mm sized specimen (thickness: 10 mm) into 10 mm x 100 mm size.
- Examples 1 to 5 are improved compared to Comparative Examples 1 to 3 and Reference Example 1 prepared by the conventional method, or it can be confirmed that they exhibit a similar level of thermal conductivity, from which Examples It can be seen from 1 to 5 that an airgel blanket having thermal insulation performance can be manufactured.
- Examples 1 to 5 have significantly lower values of surface water repellency and cross-sectional water repellency compared to Comparative Examples 1 to 3, and in particular, cross-sectional water repellency of Examples 1 to 3 is also compared to Reference Example 1. It can be seen that it has a remarkably low value. It can be seen from the excellent cross-sectional water repellency properties of Examples 1 to 3 that the airgel is uniformly formed not only on the blanket surface but also inside the blanket. In addition, in Comparative Examples 2 and 3, it can be seen that the surface water repellency and the cross-sectional water repellency have values of 10 wt% or more, and thus hydrophobicity is not expressed at all. In Comparative Examples 2 and 3, the hydrophobic airgel blanket was not formed because aging and surface modification did not proceed even if left under room temperature conditions.
- Comparative Example 4 since it was impossible to impregnate the silica sol into the blanket substrate, it was not possible to manufacture a silica airgel blanket as well as a fiber composite impregnated with the silica sol, and accordingly, thermal conductivity and water repellency itself could not be measured.
Abstract
Description
겔화 시간(min) | |||
경과 시간 0.5 H | 경과 시간 1 H | 경과 시간 2 H | |
실시예 1 | 4 | 4 | 4 |
실시예 2 | 5 | 5 | 5 |
실시예 3 | 6 | 6 | 6 |
실시예 4 | 5 | 5 | 5 |
실시예 5 | 3 | 3 | 3 |
비교예 1 | 15 | 18 | 25 |
비교예 2 | 10 | 10 | 10 |
비교예 3 | 10 | 10 | 10 |
비교예 4 | 측정 불가 | 측정 불가 | 측정 불가 |
참조예 1 | 10 | 10 | 10 |
열전도도(mW/mK) | 표면 발수도(wt%) | 단면 발수도(wt%) | |
실시예 1 | 17.2 | 2.18 | 0.71 |
실시예 2 | 17.2 | 2.39 | 1.63 |
실시예 3 | 18.1 | 3.25 | 2.19 |
실시예 4 | 18.1 | 6.85 | 6.94 |
실시예 5 | 19.3 | 3.54 | 3.77 |
비교예 1 | 18.6 | 10 이상 | 10 이상 |
비교예 2 | 18.3 | 10 이상 | 10 이상 |
비교예 3 | 17.8 | 10 이상 | 10 이상 |
비교예 4 | 측정 불가 | 측정 불가 | 측정 불가 |
참조예 1 | 17.7 | 1.93 | 2.68 |
Claims (13)
- 실리카 전구체 조성물 및 촉매 조성물을 포함하며,상기 촉매 조성물은 소수화제, 염기 촉매, 물 및 유기 용매를 포함하고,상기 염기 촉매는 실리카 졸 100 중량부 기준으로 0.4 중량부 내지 1.0 중량부가 포함되는 것인 실리카 졸.
- 제1항에 있어서,상기 물은, 소수화제 1 당량 기준으로 3 당량 내지 8 당량 포함되는 것인 실리카 졸.
- 제1항에 있어서,상기 소수화제는 촉매 조성물 100 중량부 기준으로 3 중량부 내지 15 중량부가 포함되는 것인 실리카 졸.
- 제1항에 있어서,상기 소수화제는 트리메틸에톡시실란(trimethylethoxysilane, TMES), 트리메틸실라놀(TMS), 헥사메틸디실록산(HMDSO), 트리메틸클로로실란(Trimethylchlorosilane, TMCS), 메틸트리메톡시실란(methyltrimethoxysilane, MTMS), 메틸트리에톡시실란(MTES), 디메틸디에톡시실란(DMDEOS), 에틸트리에톡시실란(ethyltriethoxysilane) 및 페닐트리에톡시실란(phenyltriethoxysilane)으로 이루어진 군으로부터 선택된 1종 이상을 포함하는 것인 실리카 졸.
- 제1항에 있어서,상기 실리카 전구체 조성물 내 실리카 전구체는 테트라메틸오르소실리케이트(tetra methyl ortho silicate; TMOS), 테트라에틸오르소실리케이트(tetra ethyl ortho silicate; TEOS), 메틸트리에틸오르소실리케이트(methyl triethyl ortho silicate), 디메틸 디에틸오르소실리케이트(dimethyl diethyl ortho silicate), 테트라프로필오르소실리케이트(tetra propyl ortho silicate), 테트라이소프로필오르소실리케이트(tetra isopropyl ortho silicate), 테트라부틸오르소실리케이트(tetra butyl ortho silicate), 테트라세컨더리부틸오르소실리케이트(tetra secondarybutyl ortho silicate), 테트라터셔리부틸오르소실리케이트(tetra tertiarybutyl ortho silicate), 테트라헥실오르소실리케이트(tetra hexyl ortho silicate), 테트라시클로헥실오르소실리케이트(tetra cyclohexyl ortho silicate), 테트라도데실오르소실리케이트(tetra dodecyl ortho silicate) 및 이들의 전가수분해물(prehydrolysate)로 이루어진 군으로부터 선택된 1종 이상을 포함하는 것인 실리카 졸.
- 제1항에 있어서,상기 실리카 전구체 조성물은 실리카 전구체, 유기 용매 및 물을 포함하는 것인 실리카 졸.
- 1) 실리카 졸을 준비하는 단계;2) 상기 실리카 졸을 블랭킷용 기재에 함침시키는 단계; 및3) 상기 실리카 졸-블랭킷용 기재 복합체를 방치하는 단계를 포함하며,상기 실리카 졸은 청구항 1 내지 6 중 어느 한 항에 따른 실리카 졸인 것인 실리카 에어로겔 블랭킷의 제조방법.
- 제7항에 있어서,상기 단계 3)에서 겔화, 표면개질 및 숙성이 수행되는 것인 실리카 에어로겔 블랭킷의 제조방법.
- 제7항에 있어서,상기 단계 3)은 별도의 표면개질 용액 및 숙성 용액를 사용하지 않고 수행되는 것인 실리카 에어로겔 블랭킷의 제조방법.
- 제7항에 있어서,상기 단계 3)은 상온 또는 상온 초과의 온도 조건 하에서 수행되는 것인 실리카 에어로겔 블랭킷의 제조방법.
- 제8항에 있어서,상기 단계 3)에서 겔화가 진행되는 시간은 3 내지 10 분인 것인 실리카 에어로겔 블랭킷의 제조방법.
- 제7항에 있어서,상기 단계 3) 이후 건조하는 단계를 더 포함하는 것인 실리카 에어로겔 블랭킷의 제조방법.
- 블랭킷용 기재; 및 블랭킷용 기재의 내부 및 표면에 형성된 실리카 에어로겔을 포함하며,단면 발수도가 0 wt% 내지 7 wt %인 실리카 에어로겔 블랭킷.
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US17/425,457 US20220098046A1 (en) | 2019-09-30 | 2020-09-28 | Silica sol, silica aerogel blanket manufactured using same, and method for manufacturing same |
EP20872693.5A EP3901092A4 (en) | 2019-09-30 | 2020-09-28 | SILICA SOL, SILICA AIRGEL BLANKET MADE USING THE SAME, AND METHOD FOR MAKING IT |
JP2021543411A JP7322156B2 (ja) | 2019-09-30 | 2020-09-28 | シリカゾル、これを用いて製造したシリカエアロゲルブランケットおよびその製造方法 |
CN202080011931.5A CN113382962B (zh) | 2019-09-30 | 2020-09-28 | 二氧化硅溶胶、使用它制造的二氧化硅气凝胶毡和制造二氧化硅气凝胶毡的方法 |
CN202311733257.3A CN117819557A (zh) | 2019-09-30 | 2020-09-28 | 二氧化硅溶胶、使用它制造的二氧化硅气凝胶毡和制造二氧化硅气凝胶毡的方法 |
JP2023121550A JP2023156350A (ja) | 2019-09-30 | 2023-07-26 | シリカエアロゲルブランケット |
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CN113396134A (zh) | 2021-09-14 |
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US20220098046A1 (en) | 2022-03-31 |
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CN113382962A (zh) | 2021-09-10 |
KR102623026B1 (ko) | 2024-01-10 |
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