Abstract: Provided is an aerogel blanket and a method for producing the same, wherein a catalyzed sol is sufficiently and uniformly impregnated into a blanket in an impregnation tank, and the catalyzed sol is allowed to stay in the impregnation tank for a specific time to control fluidity while achieving a viscosity at which the catalyzed sol can be easily introduced into the blanket, thereby forming a uniform aerogel in the blanket. As a result, the uniformity of pore structure and thermal insulation performance of an aerogel blanket are improved, the loss of raw materials is reduced through the impregnation process, the occurrence of process problems is reduced, and the generation of dust is reduced.

Abstract: A method for synthesizing a pre-hydrolyzed polysilicate, wherein a polysilicate is applied as a reactant when synthesizing the pre-hydrolyzed polysilicate, and the total amount of water added in the reaction system is specified. The method is capable of omitting a condensation reaction by applying a polysilicate as a reactant, thereby significantly shortening synthesis time and reducing production costs when compared with a typical synthesis method in which alkoxysilane-based monomer compound is used as a reactant. In addition, the gelation reaction time and the weight average molecular weight can be easily controlled, and a pre-hydrolyzed polysilicate excellent in storage stability and processability can be synthesized.

Abstract: A preparation method for an ethylene-vinyl alcohol copolymer capable of obtaining a high-purity ethylene-vinyl alcohol copolymer without an excessive washing process is described herein. According to the present disclosure, an efficiency of the washing process for obtaining the ethylene-vinyl alcohol copolymer after performing saponification on ethylene-vinyl acetate can be increased, thereby improving productivity, and minimizing the amount of wastewater generated.

Abstract: Provided is an aerogel blanket and a method for producing the same, wherein a catalyzed sol I sufficiently and uniformly impregnated into a blanket in an impregnation tank, and the catalyzed sol is allowed to stay in the impregnation tank for a specific time to control fluidity while achieving a viscosity at which the catalyzed sol can be easily introduced into the blanket, thereby forming a uniform aerogel in the blanket. As a result, the uniformity of pore structure and thermal insulation performance of an aerogel blanket are improved, the loss of raw materials is reduced through the impregnation process, the occurrence of process problems is reduced, and the generation of dust is reduced.

Abstract: A method for manufacturing an aerogel blanket, the method capable of simplifying manufacturing equipment by performing gelation while rotating a reaction vessel, improving manufacturing efficiency by controlling manufacturing time regardless of the thickness of an aerogel blanket and improving thermal conductivity by uniformly forming an aerogel in a substrate for blanket.

Abstract: The present invention relates to a device for producing an aerogel blanket, and a method for producing an aerogel blanket. The device for producing an aerogel blanket according to present invention is a device for producing an aerogel blanket, including a supply part, which supplies a fiber containing sol, and a conveyor belt which moves the fiber supplied from the supply part, wherein the conveyor belt is provided in multiple levels to move the fiber while reversing the fiber, and a start time at which the conveyor belt reverses the fiber is before fluidity of the sol is completely lost.

Abstract: The present disclosure relates to a device for producing an aerogel blanket, and a method for producing an aerogel blanket. The device for producing an aerogel blanket according to present disclosure is a device for producing an aerogel blanket, including a supply part, which supplies a fiber containing sol, and a conveyor belt which moves the fiber supplied from the supply part, wherein the conveyor belt is provided in multiple levels to move the fiber while reversing the fiber, and a start time at which the conveyor belt reverses the fiber is before fluidity of the sol is completely lost.

Abstract: The present disclosure relates to a method for manufacturing an aerogel composite, wherein the method includes impregnating a catalyzed silica sol into a fiber mat in a volume ratio of 0.1 to 1:1 (catalyzed silica sol:fiber mat) and then performing gelation thereon S10. The present disclosure also relates to an aerogel composite manufactured by the disclosed method.

Abstract: Provided is a method of manufacturing a silica aerogel blanket, and an apparatus for manufacturing a silica aerogel blanket used in the method. The method includes: (1) drying a silica hydrogel through a supercritical drying process using a supercritical extractor; (2) separating an extract discharged from the supercritical extractor into a gaseous phase including CO2 and a liquid phase including a solvent through a separator to discharge the gaseous phase and the liquid phase; and (3) condensing the gaseous phase including CO2 discharged from the separator in a condenser, wherein the separation in the separator is performed under the condition of a pressure of 60 bar to 90 bar, and the gaseous phase including CO2 discharged from the separator is condensed in the condenser so that the gaseous phase has a temperature of 10° C. or higher and a pressure of 60 bar to 90 bar.

Abstract: Provided is a method of manufacturing an alkoxysilane compound that is capable of more effectively removing ammonia generated as a by-product when the alkoxysilane compound is manufactured using a silazane-based compound, the method including adding an alcohol to a silazane-based compound of Formula 1: and allowing the alcohol to react with the silazane-based compound to prepare a first mixture comprising an alkoxysilane compound and ammonia; adding an alcohol and a compound of Formula 2: (R1)n(R2)3-nSi—X to the first mixture and allowing the alcohol and the compound of Formula 2 to react with the first mixture to prepare a second mixture in which an additional alkoxysilane compound and an ammonium salt are generated; adding an aqueous solvent to the second mixture to dissolve the ammonium salt; and separating and removing the ammonium salt.

Abstract: Provided is a method of manufacturing a silica aerogel, which includes: (1) manufacturing a hydrogel composite; (2) washing the manufactured hydrogel composite with a washing solvent; and (3) drying the washed hydrogel composite, wherein, impurities are removed from the hydrogel composite in Step (2), and the washing solvent is heated to a temperature equal to or higher than the boiling point (b.p.) of the washing solvent.

Abstract: Provided is a method of manufacturing an alkoxysilane compound, the method capable of more effectively removing ammonia generated as a byproduct when the alkoxysilane compound is manufactured with a silazane-based compound by adding and reacting a silazane-based compound. The method includes: adding an alcohol to a silazane-based compound and allowing the alcohol to react with the silazane-based compound to manufacture a first mixture containing an alkoxysilane compound and ammonia; adding an acid having a pKa of 2-6.5 to the first mixture to prepare a second mixture containing the alkoxysilane compound and an ammonium salt; adding an aqueous solvent to the second mixture to dissolve the ammonium salt; and separating and removing the ammonium salt.

Abstract: The present disclosure relates to a method for manufacturing an aerogel blanket. The method includes preparing a wet gel blanket including an organic solvent, introducing the wet gel blanket into a supercritical extraction device, and drying the wet gel blanket using supercritical carbon dioxide, decompressing the pressure of the supercritical extraction device, and supplying gaseous carbon dioxide to the decompressed supercritical extraction device to dry the wet gel blanket.

Abstract: The present disclosure provides a method for manufacturing an aerogel blanket, wherein a surface modification process is performed under acid conditions while using a non-toxic catalyst. Under such a process, a solvent substitution process or a washing process may be omitted to simplify the manufacturing process. Further, collapse of a gel structure due to shrinkage is prevented and the efficiency of surface modification is high even when atmospheric pressure drying is performed, so that an aerogel having excellent thermal conductivity and degree of hydrophobicity may be manufactured. Also provided is an aerogel blanket manufactured by the method, thereby having low thermal conductivity and a low moisture impregnation rate since a hydrophobic group is uniformly formed inside a substrate.

Abstract: Provided is a hydrophobic silica aerogel blanket comprising holes, so that the diffusion of a surface modifier is facilitated in a blanket during a surface modification process to improve the efficiency of surface modification. Accordingly, the hydrophobic silica aerogel has not only excellent physical properties such as specific surface area and thermal conductivity, but also a controlled degree of hydrophobicity, and thus, can have high hydrophobicity.

Abstract: The present invention provides an aerogel blanket including a blanket base, aerogel coupled on the surface of the blanket base, and aerogel located at a space between the blanket bases, the aerogel coupled on the surface of the blanket base is 50 wt % based on the total weight of aerogel, wherein the aerogel blanket has the number of aerogel particles separated from the aerogel blanket ranging from 13,600 to 90,000 per ft3, when vibrating the aerogel blanket at a frequency of 1 Hz to 30 Hz for 2 hours to 10 hours.

Abstract: The present invention relates to an aerogel blanket including an aerogel structure and a substrate for a blanket, wherein the aerogel structure includes a three-dimensional network structure formed by a plurality of aerogel particles aggregated or bonded, and an average aerogel structure size (D50) measured by spraying 10 ml of dry powder of the aerogel structure with air at a pressure of 15 psi, and using laser diffraction of 780 nm wavelength is 5 ?m to 10 ?m.

Abstract: The production method of the present invention can reuse a non-impregnated catalyzed sol, which has been typically discarded, by recovering the catalyzed sol, which is not impregnated in impregnating of a catalyzed sol into a blanket base, to stop gelating the catalyzed sol, and then using this in subsequently preparing a catalyzed sol.

Abstract: Provided is a method for drying a wet-gel blanket which can have an excellent heat insulation performance by minimizing shrinkage of a gel network structure that occurs during drying, and has excellent drying efficiency versus time, and a method for producing an aerogel blanket using same.

Abstract: The present invention relates to a method for manufacturing an aerogel blanket, the method including 1) introducing a catalyzed sol and a substrate for a blanket into a reaction vessel to impregnate the catalyzed sol into the substrate for a blanket, and 2) rotating the substrate for a blanket into which the catalyzed sol is impregnated to perform gelation, wherein the catalyzed sol includes a silica precursor composition, and the silica precursor composition includes a silicate containing a hydrophobic group and a tetraalkyl silicate, wherein a molar ratio of the silicate containing a hydrophobic group and the tetraalkyl silicate is 60:40 to 98:2.