摘要:
The present invention provides a monolithic silicone in the form of an aerogel or a xerogel having flexibility and capable of dissolving molecules of a substance. This silicone monolithic body having continuous through passages is synthesized by copolymerizing starting materials of both a bifunctional alkoxysilane and a trifunctional alkoxysilane or tri- or higher functional alkoxysilanes through a sol-gel reaction for forming a Si—O network while causing phase separation.
摘要:
The present invention provides a monolithic silicone in the form of an aerogel or a xerogel having flexibility and capable of dissolving molecules of a substance. This silicone monolithic body having continuous through passages is synthesized by copolymerizing starting materials of both a bifunctional alkoxysilane and a trifunctional alkoxysilane or tri- or higher functional alkoxysilanes through a sol-gel reaction for forming a Si—O network while causing phase separation.
摘要:
An organic porous material is provided being excellent in mechanical properties such as strength and in which structures of a skeleton and pores are controlled more precisely. By a production process including (i) subjecting a low molecular compound having living radical and/or anionic polymerizability to living radical or anionic polymerization in a system including the compound, an organic polymer as a phase separation inducing component, a polymerization initiator, and a polymerization solvent, and thereby forming a gel including a skeletal phase rich in a polymer of the compound and a solvent phase rich in the solvent and having a co-continuous structure formed of the skeletal and solvent phases, and (ii) removing the solvent from the gel thus formed to form a skeleton containing the polymer as a base material thereof from the skeletal phase while forming first pores from the solvent phase, and thereby obtaining an organic porous material with a co-continuous structure formed of the skeleton and the first pores.
摘要:
A method for producing an alkylsiloxane aerogel of the invention includes (a) a step of letting a reaction to produce a sol and a reaction to convert the sol to a gel take place in one step by adding a silicon compound whose molecules have a hydrolysable functional group and a nonhydrolysable functional group to an acidic aqueous solution containing a surfactant, and (b) a step of drying the gel produced in the step (a). In the step (b), the gel is dried at a temperature and a pressure below the critical point of a solvent used to dry the gel.
摘要:
Silica aerogels that are controlled in pore diameter and pore diameter distribution can be produced as follows: a surfactant is dissolved in an acidic aqueous solution; a silicon compound having a hydrolysable functional group and a hydrophobic functional group is added thereto, so that a hydrolysis reaction is carried out to yield a gel; and after the gel is solidified, the gel is dried supercritically. Preferably, the surfactant is one selected from the group consisting of a nonionic surfactant, a cationic surfactant, and an anionic surfactant, or a mixture of at least two of them. The silica aerogels produced as described above are usable for heat insulators for solar-heat collector panels or heat-insulating window materials for housing.
摘要:
The porous substrate, comprises: three-dimensional-network skeletal solid phase inside the substrate, and a skin layer same in quality as the skeletal solid phase formed on at least one surface of the substrate, and a production method thereof, comprising: forming a wet gel having a three-dimensional-network skeletal solid phase and a fluid phase rich in solvent that are separated from each other in a space between a pair of flat plates by sol-gel reaction, removing the solvent in the wet gel by drying, and removing at least one flat plate of the pair of flat plates.
摘要:
A support for solid phase extraction is provided for preventing the fracture of the porous body of the support and the space between the porous body and its container, and for processing various amounts of liquids to be processed while maintaining the ease of passage of liquid in use. The support for solid phase extraction comprises a ceramic substrate with one or more holes formed therein, and an inorganic porous material, filled in the hole or holes, which is produced by sol-gel transition accompanied by phase transition.
摘要:
Disclosed is a method for producing an inorganic porous body having precisely controlled macropores concurrently with mesopores of a narrow pore size distribution. The method comprises dissolving an amphiphilic substance as template component in an aqueous solution containing a sol-gel reaction catalyst, adding an inorganic low molecular weight compound having hydrolysable functional groups to the solution, forming a gel including a solvent-rich phase for the macropores, drying the gel to remove the solvent, and removing the template component by such means as thermal decomposition.
摘要:
The present invention provides a column for a liquid chromatograph having a honeycomb substrate including holes through which a sample flows and a separation phase filled in the holes. The separation phase is a porous bone structure composed of an inorganic material having open pores formed therein, and the porous bone structure is generated by a sol-gel transition process accompanied by a phase transition.
摘要:
In a method of manufacturing an organic/inorganic hybrid porous material containing both mesopores and macropores, a homogenous solution is prepared where a water-soluble polymer or amphipathic material as a phase separation induction element is dissolved in an aqueous solution containing sol-gel reaction catalyst elements, and a continuous 3-dimensional mesh-structured gel including a solvent-rich phase is formed. The gel is immersed in an aqueous solution containing a compound generating ammonia via hydrolysis and curing under hydrothermal conditions by heating in a closed state to form macropores by drying the gel and to evaporate the solvent from the solvent rich phase. Mesopores is formed in the skeletal phase by removing the phase separation induction elements from the gel after drying via thermolysis or extraction.