59 results about "Microporous material" patented technology

The invention relates to a fiber with improved thermal insulation properties comprising a polymeric fiber base material and a microporous material in particle form, wherein the microporous material comprises an agglomerate of precipitated insoluble amorphous metal silicates, in particular precipitated silicon dioxide. The invention further includes a method for producing a fiber with improved thermal insulation properties.

The invention discloses a lead-acid storage battery electrolyte density measuring device, and belongs to the technical field of battery measurement, the lead-acid storage battery electrolyte density measuring device comprises a detection mechanism, the detection mechanism comprises a connecting column and a tuning fork mechanism, the tuning fork mechanism comprises a tuning fork base and a tuning fork sensor, and the tuning fork mechanism is sleeved with a double-layer isolation mechanism; the double-layer isolation mechanism comprises an inner cover mechanism and a microporous outer cover mechanism, a microporous material of the outer cover mechanism enables the electrolyte to penetrate through the outer cover mechanism and block bubbles, and the inner cover mechanism enables the electrolyte to turn and flow many times to make contact with the tuning fork sensor through an inner cover first channel and an outer cover second channel which are arranged in a staggered mode. The tuning fork mechanism is sleeved with the double-layer isolation mechanism, the outer cover mechanism adopts a microporous material to achieve electrolyte permeation and bubble blocking, the inner cover forces electrolyte to flow circuitously through the staggered channel design, the double structures cooperatively eliminate bubble attachment and inhibit turbulence interference, and it is ensured that frequency signals of the tuning fork sensor are stable; and the measurement precision and sensitivity are obviously improved.

The utility model is suitable for the technical field of electronic atomization equipment, and provides an atomization core and an atomizer, the atomization core comprises a base body and a heating element, the base body is made of a microporous material, the base body is provided with a first surface and a second surface which are opposite to each other, and a ventilation opening is formed in the first surface of the base body; the heating body is arranged on the second surface of the base body, the surface of the heating body is provided with a heating area, and the heating area surrounds the ventilation opening. According to the atomization core, in the atomization work process, air in the external environment can enter the base body through the ventilation opening and make full contact with the liquid substrate located in the heating area, combustion is more sufficient, dry burning is avoided, and therefore the service life of the atomization core can be relatively prolonged, and the atomization efficiency is improved. The taste of the aerosol before and after can be kept consistent, and the use experience of consumers is improved.

The invention belongs to the technical field of ion exchange membranes, and relates to a composite membrane with a high ion selective catalytic function and a preparation method thereof. The composite membrane has a three-layer structure, namely a high-ion-selectivity base membrane doped with a microporous material and catalytic functional composite layers doped with a positive electrode catalyst and a negative electrode catalyst on two sides of the base membrane. The preparation method comprises the following steps: firstly, dissolving perfluorinated sulfonic acid resin in an organic solvent, then dividing the obtained solution into three parts, and respectively adding a microporous material, a positive electrode catalyst and a negative electrode catalyst into the three parts for dispersion; after concentration treatment, a step-by-step tape casting mode is adopted to sequentially prepare a high-ion-selectivity base membrane, a positive electrode catalytic function composite layer and a negative electrode catalytic function composite layer, and finally, the three layers are compounded to form the high-ion-selectivity catalytic function composite membrane. The prepared composite membrane endows the flow battery diaphragm with a catalytic function; through fusion of the catalyst and the diaphragm resin, the problem of catalyst shedding is solved, and the conductivity and the ion barrier ability of the diaphragm are improved at the same time.

The invention relates to the technical field of filter materials, in particular to a mineral composite filter element and a preparation method and application thereof. The mineral composite filter element comprises the following raw materials in parts by weight: 1-50 parts of a hydrogen production material, 1-15 parts of a mineralization material, 5-10 parts of a microporous material, 1-10 parts of an antibacterial material, 5-50 parts of activated carbon and 5-60 parts of a thermoplastic polymer, the hydrogen production material is one or two of magnesium-based and silicon-based mineral hydrogen production material particles. Through the integrated structural design, multiple functions of filtration, mineralization, hydrogen production, antibiosis and the like are efficiently, stably and enduringly integrated, and the defects that in the prior art, a filter element is single in function, short in service life, unstable in efficiency, complex in system and the like are overcome.

The application provides a method for high-selectivity adsorption of extremely low concentration NH3 by using alcohol amine ionic liquid microporous materials, and belongs to the technical field of gas separation and purification. In the method, the ionic liquid microporous material uses a mesoporous material as a carrier, and is modified by a multi-site alcohol amine ionic liquid to form a novel ionic adsorption material with selective adsorption NH3 sites and microporous structure. Since the proton hydrogen on the cation of the alcohol amine ionic liquid can form a hydrogen bond with NH3, and the material has a micropore effect, the material can efficiently capture NH3, especially has high selectivity at extremely low NH3 concentration, and the adsorbed NH3 can be completely desorbed by heating or reducing pressure, and the adsorbent has good circulation after regeneration, and still has a high adsorption capacity after ten cycles, thereby providing a new way for efficient purification and separation of NH3.

This invention discloses a polyetheretherketone (PEEK) / aramid fiber composite microporous material and its molding method, belonging to the field of engineering plastics processing. The invention first modifies aramid fibers by amylation and prepares carboxylated PEEK. Covalent bonding between the amino and carboxyl groups is achieved through a chemical reaction, resulting in aramid fibers coated with PEEK. These fibers are then mixed with PEEK resin, a melt flow modifier, and additives to obtain a composite material. The composite material is then subjected to biaxial thermo-stretching orientation to improve its transverse / longitudinal orientation and crystallinity. Finally, the composite microporous material is obtained through supercritical CO2 microporous foaming. Because the foaming temperature is lower than the thermo-stretching orientation temperature, the biaxial orientation structure of the composite material is well preserved, and the well-dispersed aramid fibers effectively improve the cell wall strength, inhibit cell growth and merging, significantly increase cell density, and drastically reduce cell size, thereby constructing a high-strength, heat-insulating PEEK composite microporous material.

Methods for synthesis of hierarchically ordered zeolites and zeolite-type materials are provided. Synthesized hierarchically ordered zeolites and zeolite-type materials formed according to the methods herein possess a high-degree of well-defined long-range mesoporous ordering. The methods include base-mediated reassembly, by dissolution of the parent material to the level of oligomeric structural building units of the parent material, and minimizing or avoiding amorphization / structural collapse. The dissolution and self-assembly is comprehensively controlled to produce hierarchically ordered zeolites and zeolite-type materials according to the methods herein.

The utility model relates to the field of breathable tiles, in particular to a two-way clamped breathable tile. According to the technical scheme, an upper-end rack is arranged on an upper-end connecting strip, a lower-end connecting strip is arranged on the other side of a plate-shaped breathable tile body, a lower-end rack is arranged on the lower-end connecting strip, open holes are formed in the upper-end connecting strip and the lower-end connecting strip, the upper-end rack is connected with a strip-shaped lower-end breathable tile body in a wedge-shaped mode, and the lower-end rack is connected with a strip-shaped upper-end breathable tile body in a wedge-shaped mode. The plate-shaped breathable tile body is arranged to provide a covering main body, the reinforcing supporting strips are arranged in the hollow protruding blocks to enhance the reinforcing and supporting effects, the anti-collision protection layer performs anti-collision buffering protection work, and the waterproof protection layer performs waterproof protection. The upper end rack is fixed by the upper end connecting strip, the lower end rack is fixed by the lower end connecting strip, wedge-shaped connection can be carried out, bidirectional clamping connection can be realized, the strip-shaped upper end breathable tile body and the strip-shaped lower end breathable tile body can be independently connected, and the whole structure is prepared by adopting a microporous material based on a foaming process.

The present application relates to a kind of water-soluble polyolefin dissolving agent, polyolefin microporous material and its preparation method, wherein, by mass fraction, the water-soluble polyolefin dissolving agent includes 20%~60% main porogen, 5%~30% auxiliary porogen, 20% or less compatibility regulator and the balance of water, the main porogen is selected from at least one of water-soluble polyether amine, water-soluble polyether ester, the auxiliary porogen is selected from onium salt type ionic liquid, the compatibility regulator is selected from amphiphilic substance.The water-soluble polyolefin dissolving agent of the present application can completely replace white oil / space oil as porogen, replace dichloromethane with water to extract, eliminate the safety, environmental protection and residual problems caused by organic solvent, simultaneously, by regulating the composition of water-soluble polyolefin dissolving agent and extraction condition can realize the controllable adjustment of microporous structure, and the water-soluble solution containing dissolving agent obtained by extraction can be concentrated, distilled and recycled and closed loop utilization.

The application discloses a kind of hexafluorosilicic acid anion functionalized microporous material and its preparation method and application in adsorption separation olefin / alkane.The microporous material is by metal ion Zn 2+ , inorganic anion SiF6 2‑ And azole organic ligand L are formed by the coordination of static solvothermal reaction polymer, the microporous material with the separation property can only be synthesized using static solvothermal reaction method.The microporous material has high density of anion and azole site, and the structure properties of the material can be controlled by adjusting the solvent type of the reaction, the feeding ratio of anion and azole organic ligand and the type of azole organic ligand.The microporous material obtained by the application can realize the separation of olefin / alkane based on size and electronic effect.

The invention discloses a high-magnification silicon-carbon material and a preparation method thereof, and the high-magnification silicon-carbon material is prepared by the following method: (1) alloying a silicon material and metal lithium to obtain a silicon-lithium alloy; (2) treating the silicon-lithium alloy by using an alcohol solvent to obtain a silicon microporous material; and (3) introducing high-temperature carbon source gas into the silicon microporous material to fill micropores in the silicon microporous material. The silicon-carbon material with the three-dimensional honeycomb-shaped silicon and carbon mosaic structure is prepared through a unique process, in the silicon-carbon material, silicon is of a nanometer layered stacked structure, isotropic channels are formed in the silicon-carbon material and on the surface of the silicon, and a balanced lithium ion transmission path is formed by utilizing carbon filled in the channels; and the high-rate performance of the silicon-carbon material is effectively improved.

A composition of matter is provided comprising hierarchically ordered crystalline microporous material having well-defined long-range mesoporous ordering of cubic symmetry. The composition possesses mesopores having walls of crystalline microporous material and a mass of mesostructure between mesopores of crystalline microporous material. Long-range ordering is defined by presence of secondary peaks in an X-ray diffraction (XRD) pattern and / or cubic symmetry observable by microscopy.

The invention relates to an adsorption material, in particular to a microporous Ni-MOF adsorption material and a preparation method and application thereof. The microporous Ni-MOF material provided by the invention has remarkable advantages in structural stability and aperture matching, and is just matched with the kinetic diameters of hexane isomers and benzene / cyclohexane molecules, so that the microporous Ni-MOF material can realize an efficient molecular sieving effect. Especially, the selective recognition of straight-chain / single-branched-chain and double-branched-chain hexane realizes the'complete cutting 'capability which cannot be achieved by the existing adsorbent.

This invention relates to a plasma generator based on a dense microporous material catalysis, belonging to the field of low-temperature plasma technology. The plasma generator contains at least one discharge unit, which includes a first electrode, a microporous ceramic medium, and a second electrode. The first electrode is used to connect to a power source, and the second electrode is used for grounding. The microporous ceramic medium is used to adsorb gas molecules and active particles generated by the plasma discharge. This invention generates micro-discharge in a dense microporous medium, which has an extremely high specific surface area. When gas passes through, it is adsorbed onto the surface of the micropores in the medium. Similarly, active substances in the plasma are adsorbed onto the surface of the micropores in the medium. This improves the contact efficiency between short-lived, highly active particles and free radicals in the plasma and the reactants, promotes surface catalytic reactions, and improves the overall efficiency of the device.

The invention relates to a preparation method of a beta-configuration molecular sieve and MOR-configuration molecular sieve composite microporous material with a double-microporous structure and application of the composite microporous material in light alkane isomerization. The preparation method of the composite molecular sieve comprises the following steps: providing a first molecular sieve containing a first template agent, and then preparing a second molecular sieve in the presence of a second template agent and the first molecular sieve containing the first template agent to obtain the composite molecular sieve, wherein the first template agent and the second template agent are different in chemical structure, and the first molecular sieve is a beta-configuration molecular sieve and the second molecular sieve is an MOR-configuration molecular sieve. The composite molecular sieve provided by the invention can effectively improve the selectivity of high-octane-number component multi-branched-chain alkane, thereby improving the product quality.

A composition of matter is provided comprising hierarchically ordered crystalline microporous material having well-defined long-range mesoporous ordering of cubic symmetry. The composition possesses mesopores having walls of crystalline microporous material and a mass of mesostructure between mesopores of crystalline microporous material. Long-range ordering is defined by presence of secondary peaks in an X-ray diffraction (XRD) pattern and / or cubic symmetry observable by microscopy.

The ventilation plug comprises an air plug body, one end of the air plug body is an open end, the other end of the air plug body is a closed end, a plurality of air holes are formed in the closed end, a flow channel is formed in the air plug body, and the flow channel comprises an air inlet channel and a filter element channel in the direction from the open end to the closed end. A plurality of filter elements in sliding connection with the filter element channel are sequentially arranged in the filter element channel, in every two adjacent filter elements, the diameter of the filter element close to the open end is larger than that of the other filter element, the end, close to the open end, of each filter element is of a frustum structure, and the filter element channel comprises channel parts in one-to-one correspondence with the filter elements; conical transition parts corresponding to the frustum structures are arranged between the adjacent channel parts, a flexible filtering piece made of hydrophobic microporous materials is arranged between the filter element closest to the closed end and the closed end, and the ventilation plug is long in service life and good in waterproof performance.

The invention relates to a NOx adsorbent and a preparation method and application thereof.The NOx adsorbent mainly comprises a component A and a component B. The component A is a microporous material containing metal cations, the molar ratio of SiO2 to Al2O3 is (2-20): 1, and the metal cations account for 0.01%-6.0% of the weight of the component A; the component B is at least one of a modified porous silicon oxide material or a modified porous carbon material; the component A accounts for 30%-80% by weight, and the component B accounts for 20%-70% by weight. Not only can the NOx adsorption capacity of the adsorbent be effectively improved, but also the regeneration temperature of the adsorbent is hardly influenced, and the regeneration energy consumption is prevented from being improved.

The invention discloses a method for grafting a branched ether-containing surfactant on the surface of a microporous-ultramicroporous material and application, and belongs to the field of CO2 separation material modification and CO2 / N2 separation membranes. A siloxane coupling agent is used as a cross-linking agent, a microporous-ultramicroporous material containing hydroxyl or amino is subjected to surface modification through a branched ether-containing surfactant, and the obtained material is used as a filler of a mixed matrix membrane and can be physically crosslinked with a polymer matrix through hydrogen-bond interaction in the mixed matrix membrane, so that the composite membrane is prepared. According to the present invention, the compatibility between the filler and the matrix is effectively enhanced, the uniform dispersion of the filler in the membrane is promoted, and the formation of the non-selective interface defect is reduced so as to give full play to the advantages of high specific surface area, low diffusion energy barrier and molecular sieving characteristics of the microporous-ultramicroporous material. The grafted ether group can enhance the dissolution selectivity of the material to CO2, the micropore-ultramicropore structure is beneficial to improving the diffusion selectivity of gas, and the CO2 / N2 separation performance of the mixed matrix membrane is remarkably improved through the synergistic effect of the ether group and the micropore-ultramicropore structure.

The application provides a method for regulating and strengthening hydrogen isotope simulated moving bed separation by pore structure, and belongs to the technical field of hydrogen isotope separation and purification. The method comprises the following steps: immersing an adsorption column filled with pre-activated adsorbent and corresponding gas pipelines into a solvent; introducing hydrogen isotope raw gas into at least two adsorption columns for adsorption, introducing displacement gas into at least two adsorption columns for displacement, and performing regeneration on at least two adsorption columns for regeneration; every 4-20 min, switching valves to make the adsorption columns perform different operations to simulate the reverse movement of the adsorbent relative to the gas; the hydrogen isotope raw gas comprises H2 / D2 or H2O / D2O, and the displacement gas comprises D2 or D2O; the adsorbent is a microporous material with adjustable pore structure, and the pore size ranges from 0.4 nm to 5 nm. The application has excellent separation performance, the purity of D2 reaches 98%, the recovery rate of H2 and D2 is 95%, and the desorption can be completely regenerated in 20 min; the purity of D2O reaches 90%, and the desorption can be completely regenerated in 30 min, thereby greatly improving the selectivity and separation efficiency between hydrogen and deuterium.

The invention belongs to the technical field of three-dimensional crystal porous material preparation and adsorption separation, and discloses a Zn-amidole ultra-microporous MOF material and a preparation method and application thereof.The preparation method comprises the steps that 1, zinc salt and 3-amino-1, 2, 4-triazole are added into a mixed solution of N, N-dimethylformamide and water and then placed in an ultrasonic instrument for a period of time, and a uniformly-dispersed turbid liquid is obtained; (2) placing the polytetrafluoroethylene lining filled with the turbid liquid in a constant-temperature oven for three days to obtain colorless transparent crystals; and (3) filtering the single crystal sample cooled to the room temperature, washing with water and ethanol, airing in air, transferring into a sample tube, and activating to remove the solvent in the MOF pore channel for continuous adsorption performance test. The MOF material disclosed by the invention is simple in preparation process, low in raw material cost and stable in structure, is suitable for capturing carbon dioxide in flue gas under dual regulation and control of hole patterns and amino groups, and has a wide application prospect.

The invention belongs to the technical field of catalysts, and particularly relates to a catalyst for methane dry reforming and a preparation method and application thereof. The catalyst is composed of an active component, an auxiliary agent and a carrier, the active component is Ni, the auxiliary agent is one or more of Mn, Mg, Ca, Ce, Zr, La and Y, and the carrier adopts a hierarchical porous mesoporous / microporous composite molecular sieve; the specific surface area of the carrier is 300-800m < 2 > / g, and the pore volume is 0.50-0.95 cm < 3 > / g. The catalyst provided by the invention adopts the hierarchical porous mesoporous / microporous composite molecular sieve as a catalyst carrier, and can have the advantages of a mesoporous material and a microporous material, on one hand, a large specific surface area of the mesoporous material can be maintained, the contact area of a reaction material and the catalyst is increased, and catalyst deactivation caused by blockage of a pore channel is reduced; on the other hand, the acidity of the microporous molecular sieve carrier can be maintained, and the raw material conversion rate is improved, so that the activity and stability of the catalyst are relatively high. Compared with a traditional catalyst, the catalyst is high in conversion rate and good in stability and has industrial application potential.

This invention relates to the field of metal-organic frameworks (MOFs) materials, and particularly to an ultraporous MOF material, its large-scale preparation method, and its applications. The invention discloses: an ultraporous MOF material, characterized by the chemical formula [Co(Pzc)(HCOO)]·CH3OH, where Pzc is pyrazine carboxylic acid; its large-scale preparation method includes the following steps: S1, adding a metal salt, methanol, and formic acid to a reaction vessel and reacting at 60-95°C for 2-5 hours; S2, adding a methanol solution of pyrazine carboxylic acid to the reaction vessel to obtain a suspension; S3, placing the suspension at 60-95°C for a solvothermal reaction for 4-6 hours; S4, after the reaction, cooling to room temperature in a water bath, collecting the precipitate by centrifugation, washing the precipitate repeatedly with methanol, and drying under vacuum to obtain the MOF material. This material can be used not only for the separation of binary mixtures of C2H2 / CO2 or C2H2 / C2H4, but also for the one-step purification of C2H4 from ternary mixtures of C2H2 / CO2 / C2H4. This invention enables the mass production of ultramicroporous MOF materials, meeting practical industrial needs.

Disclosed is a valve core with a microporous structure and a solenoid valve using the valve core. The solenoid valve comprises a valve body, an electromagnetic component, an elastic component and a valve core. The valve core comprises a sealing component and a microporous material. The valve core is arranged in the valve body, the elastic component is arranged between the valve core and the electromagnetic component, a flow channel is arranged on the valve body, the microporous material is matched with a flow channel on the valve body.

The application provides a sludge microwave pyrolysis device, belonging to the technical field of sludge treatment, comprising a tunnel furnace and a conveying belt arranged in the tunnel furnace, and a supporting frame and a feeding hopper are arranged at the feeding end of the tunnel furnace; two hollow extrusion rollers are rotatably connected to the supporting frame, and the gap between the two extrusion rollers is located directly below the feeding hopper; the left extrusion roller is made of microporous material; a negative pressure suction pipe that can communicate with an external suction pump is arranged on the supporting frame, and the suction end of the negative pressure suction pipe is located in the left extrusion roller; a preheating assembly that can heat sludge is arranged in the right extrusion roller, and is used for assisting in removing water in the sludge; a driving assembly is arranged on the supporting frame, and is used for driving the two extrusion rollers to rotate and extruding the sludge; and the application can reduce the probability of the influence of the excessive water in the sludge on the microwave pyrolysis work.

The invention relates to a fibre having improved thermal insulation properties, comprising a polymeric fibre base material and a microporous material in particulate form, wherein the microporous material comprises an agglomerate of precipitated insoluble amorphous metal silicates, in particular precipitated silica. The invention also relates to a method for producing a fibre having improved thermal insulation properties. The particles of the microporous material are homogeneously distributed within the polymeric fibre base material.

A system for preventing water leaks in concrete roof slabs by controlling capillary action, wherein the system comprises the following: a variety of capillary barrier inserts configured to be embedded in a concrete slab during casting, each insert comprising the following: a vapor-permeable, liquid-impermeable lower membrane made of a polymeric microporous material, configured to allow vapor diffusion while resisting the penetration of liquid water; a hydrophobic capillary interruption matrix arranged above the lower membrane and consisting of a discontinuous aggregate mixture bonded with a surface-modified hydrophobic silane-siloxane treatment, wherein the matrix has irregular cavities to interrupt continuous capillary water pathways; a multitude of passively swelling gel capsules arranged within the matrix and encapsulated in semi-permeable polymer bags, the capsules being configured to expand volumetrically upon contact with water in order to physically block the migration pathways of moisture; an upper sacrificial porosity zone consisting of a layer of lightweight concrete or aerated mortar with high pore connectivity and moisture buffering capacity, arranged above the capillary interruption matrix and in direct contact with the structural concrete above; a rigid, chemically inert structural frame made of high-density polyethylene (HDPE) enclosing the layers, the frame having mechanical interlocks and lateral seals adapted to form a continuous, mosaic-like sealing field across the panel when installed in a tiled configuration; When embedded in the plate, the system forms a multi-layered, capillary-breaking and vapor-permeable assembly that passively prevents water leaks by interrupting, hindering and redirecting water migration through capillary action.

The invention relates to the technical field of mining machinery lubrication and environment-friendly chemicals, in particular to a low-ammonia-nitrogen type environment-friendly synthetic concentrated solution for a hydraulic support and a preparation method of the low-ammonia-nitrogen type environment-friendly synthetic concentrated solution. The water-soluble defoaming agent comprises a water-soluble synthetic ester, a polyol carboxylic acid derivative, a cyclic organic acid salt, a polyether defoaming agent, a phosphono carboxylic acid copolymer and a silicon-based microporous material, a three-dimensional dynamic network is constructed through a polyhydric alcohol carboxylic acid derivative and cyclic organic acid salt, and primary capture of nitrogen-containing substances is achieved; the modified silicon-based microporous material and a covalent bond bridged hybrid wrapping layer formed by the modified silicon-based microporous material are subjected to secondary packaging, so that escape of nitrogen-containing components is effectively prevented; according to the invention, ammonia nitrogen environmental risk is substantially reduced, anti-shearing performance and hard water resistance of the product are synchronously improved through steric hindrance and charge stabilization effect, stable low ammonia nitrogen characteristic and comprehensive performance can be maintained for a long time in a complex mine environment, and working reliability and environmental sustainability of the hydraulic support are both considered.

A glaucoma shunt for draining a fluid from an eye to a tissue surrounding the eye, the glaucoma shunt being implantable within tissue of the eye, the glaucoma shunt includes a shunt body that is formed from a microporous material that is arranged so as to form a reservoir within the shunt body; and a conduit in fluid communication with the reservoir, the conduit being insertable into the eye such that the fluid at a distal end of the conduit is allowed to flow through the conduit and accumulate within the reservoir, wherein the microporous material transitions from a hydrophobic state to a hydrophilic state as the fluid that is accumulated in the reservoir diffuses to the tissue surrounding the eye through the microporous material so as to provide a variable flow resistance as the microporous material transitions from the hydrophobic state to the hydrophilic state.