摘要:
An object of the present invention is to provide a monolith columnar body capable of satisfying both adsorption performance and durability, a monolith adsorbent using the monolith columnar body, and a method of removing a metal and/or a metal ion from a liquid to be treated, with the monolith adsorbent, and, in order to achieve the object, the present invention provides a columnar body (1) having a co-continuous structure formed by: a ceramic skeleton (2) including mesopores (4); and macropores (3), wherein an average diameter of the columnar body (1) is 1.5 mm or more and 20 mm or less, wherein a most frequent pore diameter of the macropores (3) is 0.20 μm or more and 4.0 μm or less, and wherein a most frequent pore diameter of the mesopores (4) is 2.0 nm or more and 50 nm or less.
摘要:
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.
摘要:
A method for preparing a novel hydrogel including silico-metallic mineral particles of the formula (Six(Si-A)1−x)4M3O11.n′H2O, in which: x is a real number in the range [0.75; 1], A denotes a group selected from methyl and hydrocarbon groups including at least one heteroatom, and M is a metal selected from the group consisting of magnesium, cobalt, zinc, copper, manganese, iron, nickel and chromium, wherein a coprecipitation reaction is carried out in an aqueous medium between: at least one metal salt of the metal M, sodium metasilicate, Na2OSiO2, and at least one water-soluble oxysilane of formula (I): in which R1, R2 and R3 are selected from hydrogen and linear alkyl groups including 1 to 3 carbon atoms.
摘要:
The present invention relates to a method for manufacturing an aerogel sheet. The method for manufacturing an aerogel sheet includes: a step (a) of immersing a blanket in an impregnation vessel in which silica sol is stored to impregnate the silica sol; and a step (b) of injecting a gelling catalyst to a surface of the blanket in which the silica sol is impregnated to gelate the silica sol.
摘要:
Disclosed is a water-dispersed aerogel, having an eco-friendly composition that contains an organic solvent in a decreased amount while increasing ease of use of aerogel microparticles in a liquid phase and a method of manufacturing the water-dispersed aerogel is also provided.
摘要:
The silica sol of the invention contains silica particles having a mean primary particle size of 20 to 100 nm and which has a silica particle size/mean primary particle size ratio, determined through dynamic light scattering, of 3.0 or less, wherein the silica particles are surface-treated with an organic silane compound and have an α-ray emission rate of 0.005 counts/cm2·hr or less and a moisture absorption coefficient, determined after allowing the silica particles to stand for 48 hours at 23° C. and a relative humidity of 50 RH %, of 0.5 mass % or lower.
摘要翻译:本发明的硅溶胶含有平均一次粒径为20〜100nm的二氧化硅粒子,其二氧化硅粒子尺寸/动态光散射测定的平均一次粒径比为3.0以下,二氧化硅粒子为 用有机硅烷化合物进行表面处理,并且在23℃下使二氧化硅粒子静置48小时后测定的α射线排出率为0.005个/ cm 2·小时以下,吸湿系数为 湿度为50%RH,为0.5质量%以下。
摘要:
Provided are a solvent-substitution solvent for producing a hydrophobized aerogel and a method for producing a hydrophobized aerogel. The solvent-substitution solvent includes pentanol in an amount of 41 wt % to 100 wt % and n-butanol in an amount of 0 wt % to 59 wt %. The method includes performing a solvent substitution process using the solvent-substitution solvent. If the solvent-substitution solvent is used for solvent substitution and/or hydrophobization in an aerogel production process, water (moisture) contained in a wet gel may be effectively substituted with the solvent-substitution solvent, and the solvent-substitution solvent may easily be collected at a high degree of purity and may be reused if necessary. Therefore, the rate of solvent loss may be minimized. In addition, if the solvent-substitution solvent is used for solvent substitution, a hydrophobized aerogel may be obtained without having to perform a hydrophobizing process using an additional hydrophobizing agent such as a silylating agent.
摘要:
A method for producing a flowing silica composition including a sol-gel transfer, where redispersion is carried out. The redispersion includes adding, after having reached gel point of the sol-gel transfer, liquid into the gel formed by the sol-gel transfer, and the addition being made within a sufficiently short time period after reaching the gel point, to result, after mixing of the gel and the liquid, in a rheologically homogenous flowing silica composition, which is and remains injectable as such, or by short stirring
摘要:
The present invention provides a porous hollow silica micro- or nanoparticle with a polymer grafted thereon, wherein the polymer is selected from poly(methacrylic acid) and copolymers thereof. The polymer may be covalently linked to the silica particle via a bridging group. Provided is also a method of covalently coupling a poly(methacrylic acid) to a silica surface of a hollow silica particle. The method comprises contacting a silica surface of a hollow silica particle that carries amino functional or halogen functional groups with a poly(methacrylic acid) or a copolymer or a respective monomer thereof. The method further comprises allowing the carboxyl group of the monomer or the poly(methacrylic acid) and an amino functional group or a halogen functional group on the silica surface to undergo a coupling reaction, thereby covalently coupling the polymer to the silica surface.
摘要:
This invention relates to a process for converting silica to polysilicate gels or hydrogels by combining an aqueous silica source with a CO2 feed stream as the gel initiator, whereby the reaction stream is propelled at high velocity and turbulence maintaining the CO2 uptake rate in the reaction stream. The invention also relates to a process for converting silica to polysilicate by pre-carbonating water at pressures of equal to or greater than 100 psig before initiating the polysilicate reaction.