43 results about "Porous monolith" patented technology

The present disclosure relates to aerosol delivery devices, methods of producing such devices, and elements of such devices. In some embodiments, the present disclosure provides devices configured for vaporization of an aerosol precursor composition that is contained in a reservoir and transported to a heating element by a liquid transport element. The liquid transport element may include a porous monolith.

Articles of manufacture and devices and methods of forming and using the same are provided, wherein the article comprises a porous inorganic substrate contained in or bounded by a support made from an inorganic material are provided, wherein said porous substrate and support are heated to a temperature effective to shrink the support onto the porous substrate such that liquid tight contact is formed between the porous substrate and the support. In a preferred aspect, the porous inorganic substrate has a porosity of at least 5%, and is a porous monolith formed using a sol-gel method. The articles thus formed provide a confined fluid flow through the porous substrate, providing superior performance in separations, catalysis, filtration, and the like.

A flow-through ion exchange medium comprising a monolithic stationary phase having interconnecting pores defined by pore walls, and fine ion exchange polymeric layering particles irreversibly bound directly or indirectly to the pore walls, and methods of making such medium and its use on chromatographic separators.

A method for producing a monolithic porous body having a trimodal hierarchical porous structure by a sol-gel method is provided. The method includes a sol preparation step of preparing a precursor sol, a gelation step of inducing a sol-gel transition and a phase separation in parallel on the precursor sol in a gelation container housing a template obtained by configuring organic polymer fibers into an aggregation having a three-dimensional spread, to form a gel made of a co-continuous structure of a hydrogel phase and a solvent phase, in the space around the organic polymer fibers, and a removal step of removing the solvent phase and the organic polymer fibers individually or simultaneously from the gel. The organic polymer fibers have a structure in which the cross section perpendicular to the longitudinal direction is contractible while the extension in the longitudinal direction is restricted. Template holes, through-pores and smallpores are formed in voids remaining after the removal of the organic polymer fibers, voids remaining after the removal of the solvent phase, and a skeleton of the hydrogel phase, respectively.

A method for impregnating porous monolith supports with catalytically active materials is disclosed. The impregnation is carried out at a temperature which substantially reduces chemisorption rates such that reactions between the monolith substrate and catalytically active materials in the catalyst solution are minimized. The process can be completed in a practical time that allows for unit selectivity of the weight ratio of catalytically active materials in the substrate to the weight ratio of catalytically active materials in the catalyst solution.

A process for manufacturing a separation membrane with excellent productivity, which can uniformly dry and imidize a separation membrane precursor solution formed on an inner surface of through-holes of a monolith substrate and which does not require complicated operations such as placement of a monolith substrate in a dryer, and the separation membrane manufactured by the process are provided. The separation membrane is manufactured comprising: causing a separation membrane precursor solution to pass through through-holes in a porous monolith substrate, to form a membrane of the precursor solution on the surface of the through-holes, and drying the membrane by causing hot wind to pass through the through-holes.

The invention provides a preparation method of a microfluidic monolithic column chip and an application of the chip in raman detection. The method comprises the steps that a polydimethylsiloxane (PDMS) microfluidic chip is prepared; a porous monolithic column solution is prepared; a monomer, a crosslinking agent, a pore-forming agent and a photoinitiator are subjected to ultrasonic mixing; nitrogen is supplied for deoxygenization; and finally the monolithic column solution is put in an ice bath for preservation. The solution is injected into a microfluidic chip pipeline, sealed and subjected to ultraviolet exposure, methanol washing is adopted for removing the pore-forming agent and the unreacted monomer, deionized water is used for washing sufficiently, a silver microsphere solution is injected into the microfluidic chip, ultra-sensitive raman real-time detection of a to-be-detected sample is achieved by utilizing silver microsphere enrichment and a surface raman enhancement effect, and a detection limit of the method can reach 10-12M. The method is convenient, flexible, low in cost, low in energy consumption, and convenient to popularize, and is widely applied to the fields of serum marker detection, gas marker detection, environmental monitoring, food safety and the like.

The present disclosure relates to aerosol delivery devices, elements of such devices, and methods for producing vapor. In some embodiments, the present disclosure provides devices configured for vaporization of an aerosol precursor composition that is contained in and transported to a heating element by a unitary reservoir and liquid transport element. The unitary reservoir and liquid transport element may include a porous monolith.

The present disclosure relates to aerosol delivery devices, methods of forming such devices, and elements of such devices. In some embodiments, the present disclosure provides devices configured for vaporization of an aerosol precursor composition that is stored in and / or transported to a heater by a porous monolith, which can be, for example, a porous glass or a porous ceramic. A heater can be in a heating arrangement with an external portion of the porous monolith or can be substantially internal to the porous monolith.

The invention relates to the preparation of a hybrid porous monolithic material based on mercapto-epoxy click polymerization. Specifically, polyhedral oligomeric silsesquioxanes (POSS), polymercapto crosslinking agent, porogenic solvent, porogen and catalyst containing polyepoxy functional groups are mixed and ultrasonically dissolved, and then dissolved at a certain temperature After the thiol-epoxy click polymerization reaction (thiol-epoxy click polymerization reaction) occurs, the organic-inorganic hybrid porous monolithic material can be prepared in one step. The preparation method has the advantages of simple and fast operation, mild conditions, and strong versatility. In addition, different polymercapto organic crosslinking agents can be selected according to different application requirements and the combination of polyepoxy monomer and polymercapto crosslinking agent can be changed. By adjusting the ratio of those or adjusting the porogenic system, a series of different organic-inorganic hybrid monolithic materials can be prepared.

Process for preparing a porous monolith comprising between 10% and 100% by weight of a semiconductor relative to the total weight of the porous monolith, which process comprises the following steps:a) a first aqueous suspension containing polymer particles is prepared;b) a second aqueous suspension containing particles of least one inorganic semiconductor is prepared;c) the two aqueous suspensions prepared in steps a) and b) are mixed in order to obtain a paste;d) a heat treatment of the paste obtained in step c) is carried out in order to obtain the monolith with multimodal porosity.

The invention relates to the preparation of a polyacrylate hybrid monolithic material added with a polyhedral oligosesquioxane reagent (POSS). The first step is to mix polyhedral oligosesquioxane reagents with mercapto groups with other two acrylate monomers, add a porogenic solvent for ultrasonic dissolution; initiate acrylate self-polymerization and mercapto-acrylic acid in situ through ultraviolet light initiation. The hybrid monolithic material can be obtained by ester click chemistry reaction. The monolithic material has a simple and rapid preparation process, mild reaction conditions, uniform pore structure and good thermal stability, and can be applied to high-efficiency chromatographic separation and analysis of small molecular compounds and complex biological samples.

The invention relates to the field of macromolecules, in particular to a method for preparing highly crosslinked porous organic monolithic materials based on photoinitiated free radical polymerization. The present invention dissolves acrylates containing multiple unsaturated double bonds, functional monomers containing unsaturated double bonds and initiators in a porogenic solvent ultrasonically, and undergoes free-radical polymerization under ultraviolet light irradiation. reaction, in-situ formation of porous organic monoliths, which can be prepared into organic porous monoliths with different surface properties and functions. The preparation method has the advantages of simple and fast operation and fast reaction speed. In addition, different organic functional monomers and porogen systems can be selected according to different application requirements to prepare a series of porous organic materials with different physical and chemical properties. overall material.