230 results about "Large pore size" patented technology

The invention discloses a waterproof long-lasting oil-control gel composition and a preparation method thereof, and belongs to the technical field of cosmetics. The composition comprises 4-6 parts of an oil absorption compound A, 9-13 parts of an oil absorption compound B and 70-95 parts of a gel matrix, wherein the oil absorption compound A is prepared from mesoporous silica and poloxamer 407, and the aperture of the oil absorption compound A is 5-10 nm; the oil absorption compound B is prepared from polymethyl methacrylate microspheres, isododecane and polyglycerol-3 diisostearate, and the pore diameter of the oil absorption compound B is 150 to 300 nm. According to the invention, through dual mechanisms of temperature response and volatilization driving, a dynamic gradient structure of bottom layer small aperture-surface layer large aperture is formed at skin temperature, and directional migration of grease is realized; meanwhile, the surface property transformation of the material after oil absorption is creatively utilized, a hydrophobic membrane is formed on the surface of the polymethyl methacrylate microsphere, a self-enhanced waterproof barrier is constructed, the unique effect that the more oil is absorbed, the more water is resisted is achieved, the problem of makeup removal caused by sebum and sweat can be effectively solved, and the makeup lasting time is remarkably prolonged.

The invention provides a preparation method for preparing porous carbon based on an aerogel method, the porous carbon and application of the porous carbon, and belongs to the technical field of porous carbon material preparation. The preparation method comprises the following steps: mixing polyhydroxy phenol, aromatic aldehyde, acrylamide, graphene oxide and lithium salt according to a mass ratio of 100: (50-200): (5-30): (1-5): (1-5), carrying out hydrothermal reaction at 100-200 DEG C for 1-6 hours, and freeze-drying at-40 DEG C to obtain a hydrogel precursor; and carbonizing the precursor in organic heteroatom gas at 500-800 DEG C, mixing the intermediate with alkali according to the ratio of 100: (100-500), activating at 900-1100 DEG C, pickling and drying to obtain the porous carbon. The conductivity of the product is improved by means of graphene, lithium salt and heteroatoms, and the aerogel method obtains large aperture, has the characteristics of low impedance, high first efficiency and small charge-discharge expansion, and can be efficiently applied to silicon-carbon materials.

The invention provides an aerogel film with a continuous gradient pore structure and a preparation method and application thereof.The preparation method comprises the steps that a pre-crosslinking solution containing a polymer nanofiber suspension, a sodium alginate solution, a polyethyleneimine aqueous solution and a crosslinking agent is sprayed to a temperature-conducting substrate with the initial temperature ranging from-20 DEG C to-15 DEG C at high pressure; and freeze-drying to obtain the aerogel film with the continuous gradient pore structure. The aperture of the aerogel film is gradually increased from bottom to top, and the range of the aperture is mainly 1-110 [mu] m. The aerogel film is placed in a filter membrane clamp, so that a solution to be filtered passes through the aerogel film according to the sequence of'macropore-mesopore-micropore ', the aerogel film is used for intercepting and recycling particles with different sizes, such as micro-plastics, and high water flux and high rejection rate are both considered. The pore size of the aerogel film can be changed by adjusting the temperature of the temperature-conducting substrate; the prepared aerogel film improves the trade-off effect in the existing filtration separation technology, and has a wide market prospect.

The invention discloses an asymmetric sulfone polymer nanoscale filter membrane as well as a preparation method and application thereof, and belongs to the technical field of membrane materials. The filter membrane comprises a filter membrane main body, the filter membrane main body comprises a pre-filtering layer and a separation layer for intercepting impurities, the average thickness of the separation layer is 0.5-12 microns, and the porosity is 40-80%; the ratio of the maximum aperture of the PMI to the minimum aperture of the PMI of the filter membrane is 1.2-3.5, the retention rate of the filter membrane to 2nm colloidal gold is greater than or equal to 90%, and the ratio of the standard deviation of the area value of the brightness displacement spectrum to the average value of the area value is 0.01-2 when the filter membrane with the retention rate of 2nm colloidal gold is subjected to section brightness measurement; the separation layer structure which is thin and uniform in thickness and the proper pore size and pore size distribution of the filter membrane are combined with high porosity, so that the filter membrane can be ensured to have high flux and high cleanliness while having high interception efficiency, and the filter membrane is suitable for nanoscale purification of a liquid treatment agent used in a semiconductor wet process.

Proppant particles formed from slurry droplets and methods of use are disclosed herein. The proppant particles can include a sintered ceramic material and can have a size of about 80 mesh to about 10 mesh and an average largest pore size of less than about 20 microns. The methods of use can include injecting a hydraulic fluid into a subterranean formation at a rate and pressure sufficient to open a fracture therein and injecting a fluid containing a proppant particle into the fracture, the proppant particle including a sintered ceramic material, a size of about 80 mesh to about 10 mesh, and an average largest pore size of less than about 20 microns.

The application discloses a kind of linear cutting continuous processing methods of seat body large aperture parallel group hole, belong to mechanical manufacturing technical field.This method is first with seat body A face as reference, planing, planing seat body shape and concave surface to drawing size;Again, workpiece is once clamped and aligned, and linear cutting molybdenum wire is used along preset trajectory to continuously cut, and all large aperture through hole is simultaneously processed, and 45° chamfer bevel is reserved at cutting place;Finally, intermittent welding is used to cutting seam, and workpiece temperature is strictly controlled not to exceed 80 DEG C to prevent thermal deformation, and after welding, weld is ground flat to make surface flush with concave surface.The application is characterized by linear cutting without mechanical cutting force, solves the problem that tool is easily appeared in traditional boring machine processing, through hole taper is big, parallelism is poor, effectively guarantees the size and shape accuracy of through hole.Workpiece is only single clamping, and it is free from dependence on high-skilled operators, processing efficiency and product consistency are significantly improved, and it is suitable for batch processing of large-size seat body parallel deep hole of 45 steel.

The invention discloses a pole piece. The pole piece has a large aperture size, uniform pores with relatively large sizes are formed in a slurry layer of the pole piece through a salt template method, and the defect that the pores formed by a gas pore-forming agent are too small is overcome; meanwhile, the performance of the pole piece is improved. A battery cell prepared from the pole piece disclosed by the invention can give consideration to both high volume energy density and good constant-current charging ratio.

The application discloses a kind of polymer porous membrane, its preparation method and application in turbidity removal pre-filtering, belong to the technical field of porous membrane preparation.Its technical scheme includes: when the non-solvent phase separation of film-forming polymer solution occurs and the separation layer is formed on the outer surface of polymer membrane, simultaneously, water-soluble coating layer polymer solution is coated on the surface of separation layer, to obtain polymer porous membrane;Film-forming polymer solution uses polysulfone polymer as film-forming base material, uses water-soluble chloride as porogen, uses nitrogen-containing organic matter as solvent;Coating layer polymer solution has porogen effect, and viscosity is 200-1000 mPa·s.The application is applied to turbidity removal pre-filtering, solves the technical problems that existing non-solvent phase separation technology is difficult to obtain large aperture, surface opening rate is high and easy to appear finger-shaped hole, has the characteristics of large aperture, surface opening rate is high, cross section is sponge hole.

This invention discloses a copper-based catalyst supported on macroporous alumina, its preparation, and its application. The macroporous alumina-supported copper-based catalyst comprises a macroporous alumina support and copper oxide and lanthanum oxide supported on its surface. The macroporous alumina-supported copper-based catalyst is particulate with a specific surface area of ​​250-500 μm. 2 / g, pore volume 1.0~2.0 cm³ 3 The copper-based catalyst supported on macroporous alumina has an average pore size of 16-30 nm. The content of each component in the catalyst, expressed as a mass percentage, is as follows: macroporous alumina support 79%-98.9%, copper oxide 0.1%-6%, and lanthanum oxide 1%-15%. The macroporous alumina-supported copper-based catalyst of this invention exhibits high catalytic activity and selectivity for higher alcohols in the ethanol-to-higher alcohol reaction, particularly showing higher selectivity for C6-C10 fatty alcohols.

This invention discloses a method for hydrotreating catalytic cracking slurry. A fixed-bed hydrotreating process is employed, comprising: in the presence of hydrogen, the catalytic cracking slurry sequentially contacts a hydrotreating protectant, a hydrotreating transition catalyst, and a hydrodesulfurization catalyst to undergo a hydrotreating reaction, yielding hydrotreated oil. The hydrotreating protectant comprises an alumina support with a most probable pore size of 40–100 nm, molybdenum oxide, and cobalt oxide. The hydrotreating transition catalyst comprises an alumina support containing additives and MoO3 and CoO. The support has a bimodal pore size distribution, with smaller pores concentrated in the 10–40 nm range and larger pores concentrated in the 150–400 nm range. This method eliminates the diffusion resistance during the adsorption and reaction of large molecules on the catalyst surface during the hydrotreating of catalytic cracking slurry, increases the capacity for more deposits such as coke, extends the operating cycle of the unit, and facilitates hydrodesulfurization and other reactions. It also increases the content of tricyclic and tetracyclic aromatics in the hydrotreated oil, making it a high-quality feedstock for needle coke production.

This utility model relates to the field of laboratory wastewater treatment technology and discloses a laboratory wastewater discharge device with a filter anti-clogging structure, including a storage tank and a disassembly assembly. This laboratory wastewater discharge device with a filter anti-clogging structure, through the arrangement of a storage tank, connecting plate, first filter screen, second filter screen, and third filter screen, allows the wastewater to be filtered. First, the wastewater enters the filter tank through the feed hopper, then contacts the first filter screen. The larger pore size of the first filter screen initially intercepts larger impurities in the wastewater. Then, the smaller pore size of the second filter screen further filters out slightly smaller impurities. Finally, because the third filter screen has the smallest pore size, it intercepts even finer particles and colloidal substances in the wastewater, thereby filtering out solid impurities in the wastewater. This greatly improves the purity of the filtered wastewater, enabling the discharged wastewater to meet higher standards, reducing the load on subsequent wastewater treatment systems, and lowering the risk of environmental pollution.

The application discloses a kind of phosphoric acid group modified β-cyclodextrin-based polymer film microextraction coating material and its application.First, a kind of phosphoric acid group β-CD porous crosslinked polymer (DBP-β-BNCD) and its preparation method are provided.The DBP-β-BNCD has the advantages of large specific surface area, narrow pore size distribution, large pore volume, good thermal stability, etc., which is beneficial to the accessibility of adsorption sites.When adsorbing hydrophilic pollutants antibiotics, various adsorption mechanisms such as polarity interaction, hydrogen bond interaction and π-π interaction are introduced.Further, by using DBP-β-BNCD as a thin film solid phase microextraction coating material, a method combining TFME with high performance liquid chromatography-tandem mass spectrometry (HPLC-QqQ-MS) is established, and the results show that the coating material has great potential for the extraction of hydrophilic organic pollutants in the environment.

The application discloses a preparation method of a high-stability cellulose nanofluid film, and a product and application thereof, and belongs to the field of energy conversion and material science. The method comprises the following steps: adding modified cellulose into an ionic liquid to prepare a solution by heating; dropping and coating the solution onto the surface of a porous polymer film, and preparing a gel film by heating and vacuum treatment; and obtaining the nanofluid film after water soaking and drying of the gel film. The nanofluid film adopts an embedded structure, the cellulose layer is a small-pore structure, the porous polymer film is a large-pore structure, and the nanofluid film has etching and three-dimensional network channel structures. The preparation process is simple and the conditions are mild, the prepared film has excellent ion rapid selective transmission performance, acid-base stability and long-term operation stability, can efficiently convert salinity gradient energy into electric energy, and has a good application prospect in the field of salt-difference osmotic energy utilization.

A lithium secondary battery with reduced Hi-pot defects and improved capacity retention rate. According to one aspect of the present disclosure, a lithium secondary battery includes an anode, a cathode, and a separator interposed between the anode and the cathode. The anode includes a Si-based anode active material. The separator includes a separator substrate having a plurality of pores and including a polyolefin resin. The polyolefin resin has a polydispersity index (PDI) of 2.5 to 4.2, an average pore size of 20 to 40 nm, and a maximum pore size of 50 nm or less.

The invention discloses a preparation method of through hole type resin, and belongs to the technical field of polymer resin materials. A ternary composite pore-foaming agent composed of toluene, n-heptane and polyethylene glycol (PEG) is adopted, the proportion of the ternary composite pore-foaming agent is optimized, and the through type resin is prepared through suspension polymerization and temperature programming curing. The resin prepared by the method has a highly through pore channel network, the penetration rate is not less than 50%, the resin also has appropriate large pore diameter and relatively high specific surface area and pore volume, meanwhile, the resin keeps good mechanical stability while obtaining an excellent penetration structure, the preparation process is good in repeatability, and the preparation method is suitable for industrial production. An ideal material is provided for the fields of high-performance adsorption separation, chromatographic analysis, catalysis and the like.

Provided is an alumina sintered body having excellent dust-generating resistance of an yttrium-based protective film formed on the surface thereof.　In this alumina sintered body, the number of pores in at least one surface is at most 12,000 pores / mm2, the open porosity is preferably at most 0.30%, the purity is preferably at least 99.20 mass%, the bending strength is preferably at least 320 MPa, the density is preferably at least 3.80 g / cm3, the maximum diameter of the pores is preferably at most 15.00 μm, the maximum depth of the pores is preferably at most 15.00 μm, and the area ratio of the pores in the surface is preferably at most 5.000%.

The application provides a method and system for determining the permeability of a tight sandstone reservoir. The method comprises: obtaining the porosity and pore throat radius distribution spectrum of the target reservoir; dividing the pore throat radius distribution spectrum of the target reservoir into two parts, i.e., a large-aperture part and a small-aperture part; determining the ratio of the cumulative amplitude of the pore throat radius distribution of the large-aperture part to the cumulative amplitude of the pore throat radius distribution of the small-aperture part based on the pore throat radius distribution spectrum of the large-aperture part and the small-aperture part of the target reservoir; and determining the permeability of the target reservoir based on the ratio and the porosity of the target reservoir. The method can accurately determine the permeability of a reservoir in a tight sandstone reservoir with strong heterogeneity.

The present application relates to the technical field of industrial solid waste utilization, and discloses a synthesis method of smelting fly ash-based mesoporous material, which uses smelting fly ash as a main raw material, uniformly mixes sodium carbonate and smelting fly ash at a specific ratio, and calcines at a suitable temperature, so as to destroy the difficult-to-dissolve glass phase and mullite phase in the smelting fly ash, make the smelting fly ash form a low-carbon cerchi stone phase which is easy to react with acid, and react with low-concentration hydrochloric acid, so as to prepare a mesoporous material with large specific surface area and pore volume and concentrated pore size distribution. The specific surface area of the best sample in the present application is 567.45 m2 / g, the pore volume is 0.95 cm3 / g, the most probable pore diameter is 18.30 nm, the Si / Al ratio is 3.65, and the yield is 44.59%. The preparation process of the method is simple, does not need to use expensive template agents, has high implementability and production safety in actual production, and realizes high-value utilization of smelting fly ash.

The application discloses a method for preparing porous zeolite composite materials from iron tailings and application, and converts fine-grained iron tailings with complex composition and low reaction activity into soluble salt through alkali fusion activation, and then converts the soluble salt into zeolite composite materials with uniform particle size and rich pores through hydrothermal crystallization. The application does not perform raw material pretreatment steps such as grinding and impurity removal, does not introduce a structure directing agent, controls the crystal structure of the iron tailings through alkali fusion activation-hydrothermal crystallization reaction, makes [SiO4] and [AlO6] structure units dissolve and recombine, simultaneously realizes in-situ doping and surface loading of iron elements, and constructs micrometer-level octahedral porous zeolite composite materials. The prepared porous zeolite composite materials have a large specific surface area, uniform pore size distribution and complete crystal structure, and exhibit excellent catalytic oxidation performance in a Fenton-like system, can efficiently remove emerging pollutants such as antibiotics, and are helpful to efficient and high-value utilization of fine-grained iron tailings resources, and have a wide application prospect in the field of wastewater treatment.

According to one aspect of the present invention, a thin film separator with improved insulation properties and a preparation method thereof are provided. According to one aspect of the present invention, the separator can have an advantage of implementing a dielectric breakdown voltage of 1,000 V or less while having a thickness of 8 μm or less. To this end, according to one aspect of the present invention, the separator having a controlled maximum pore size within a polymer substrate and a preparation method thereof are provided.

The invention provides porous fluorescent ceramic as well as a preparation method and application thereof, and belongs to the technical field of lighting materials. The porous fluorescent ceramic comprises a fluorescent ceramic phase and pore phases dispersed in the fluorescent ceramic phase, wherein the chemical formula of the fluorescent ceramic phase is Y3Al5O12: Ce < 3 + > or Lu3Al5O12: Ce < 3 + >; the pore phase comprises a plurality of first pores with the pore diameter of 100-300nm and a plurality of second pores with the pore diameter of 500-1000nm. The pores with different pore diameters are uniformly distributed in the ceramic body, and the pores with large pore diameters and the pores with small pore diameters are matched, so that the micro-channels of light are increased, the scattering, refraction and reflection of the light are increased, more complicated low-light-path change is triggered, the luminous efficiency is integrally improved, and the luminous uniformity and the luminous brightness are enhanced.

The application relates to the technical field of eye cold compress, in particular to a quick-cooling eye mask for cold compress; the eye mask comprises a containing cavity construction module, a transient refrigeration module, an anisotropic tension module and a thermal rheological self-adaptive adjustment module; the system combines carbonamide chemical endothermic and high-molecular water-absorbing resin swelling phase change mechanism to construct a cold quantity and local rigidity compensation system; the core is to follow the thermal rheological self-adaptive adjustment rule, utilize the microporous penetration membrane to self-adaptively expand the pore diameter along with the local temperature recovery, control the pure water supplement penetration amount and generate a hydrogel, and simultaneously combine the flexible traction rib to realize one-way conversion of the expanded volume to the eye socket conformal positive pressure; the application discards the defect that the traditional liquid refrigeration medium is prone to sedimentation under the action of gravity due to low viscosity flow, utilizes temperature osmotic pressure interaction to solve the problem that the eye socket curved surface is difficult to be closely attached, and effectively realizes self-adaptive compensation of the local cold quantity and the attachment rigidity.

This invention relates to the field of high-purity aluminum and aluminum alloy production technology, and particularly to a porous alumina ceramic material, its preparation method, and its application. The material comprises a composite aggregate and an organic binder, wherein the mass ratio of the composite aggregate to the organic binder is 47:3. The composite aggregate comprises 9 wt%–17 wt% inorganic binder and 83 wt%–91 wt% aggregate particles. The inorganic binder comprises: 40 wt%–50 wt% B₂O₃, 20 wt%–29 wt% Al₂O₃, 10 wt%–15 wt% SiO₂, 9.4 wt%–14.4 wt% MgO, 0–0.5 wt% Na₂O, 0–0.5 wt% K₂O, and 0–10 wt% Re₂O₃, where Re is a rare earth element. This method uses corundum or α-Al₂O₃ as a framework and rare earth composite oxides as an inorganic binder. A high-temperature reaction forms sintering necks between the aggregate particles, resulting in a porous alumina ceramic with a bimodal pore distribution. Two different pore sizes are distributed in situ on the surface of the skeleton particles and the sintered neck, achieving a dual-capture filtration effect for aluminum molten inclusions. This solves the problem that filters with large pore sizes cannot simultaneously filter small-grain-sized impurities.

The utility model discloses a constant-temperature air compressor room, which belongs to the field of air compressors and comprises an air compressor room with a plurality of interlayers, an air compressor positioned inside the air compressor room, a temperature controller for controlling the inside of the air compressor room, an electric controller for driving the air compressor and the temperature controller, and an air filter for purifying indoor air. Compared with the prior art, the device has the advantages that sound insulation and electromagnetic wave shielding can be effectively carried out through the interlayer formed by the large-aperture foam aluminum alloy blocks, heat can be transmitted in air holes more easily due to large air holes and high porosity of the large-aperture foam aluminum alloy blocks, and therefore high heat conductivity is achieved, and the service life of the device is prolonged. In order to solve the problem that the large-aperture foam aluminum alloy is fragile, ceramic radiating fins are adhered to the outer wall ends of the large-aperture foam aluminum alloy blocks, and the large-aperture foam aluminum alloy blocks can be prevented from being broken by external force while insulation protection is performed through the ceramic radiating fins.

The invention belongs to the field of separation and filtration, and particularly relates to a filtering membrane with aperture sizes in gradient arrangement and a preparation method thereof. The preparation method comprises the following steps: (1) preparing a membrane casting solution: mixing and dissolving dimethylacetamide, polyether sulfone, polyethylene glycol and an auxiliary agent, and defoaming to obtain the membrane casting solution; (2) preparing core liquid: mixing dimethylacetamide with water to obtain the core liquid; (3) preparing a gel bath: mixing dimethylacetamide with water to obtain the gel bath; the concentration of the gel bath is smaller than that of the core liquid; and (4) preparing the filter membrane: enabling the membrane casting solution to be in contact with the core solution and the gel bath through a spinneret plate, and enabling membrane filaments to pass through the gel bath to a filament collecting tank, so as to obtain the filter membrane of which the pore sizes are arranged in a gradient manner. The pore diameter of the filtering membrane is changed from a large pore diameter on one side to a small pore diameter on the other side in a gradient manner, and the filtering membrane has high retention rate and high flux, high mechanical strength, easy cleaning and low energy consumption.

The present invention relates to a separator film in a lithium battery, more specifically relates to a polyolefin microporous film and a preparation method thereof. The polyolefin microporous film has a porosity above 30% and below 65%, a median pore size above 10 nm and below 60 nm, a stress-strain (σ-ε) curve integral in Machine Direction (MD) and Transverse Direction (TD) directions simultaneously fulfilling the following definition:E=∫0εσ(ε)dε>150 J / m2; andthe largest pore size, the smallest pore size and the median pore size fulfilling the following definition: 0.9<P<1.2, wherein P=(the largest pore size−the smallest pore size) / the median pore size. The polyolefin microporous film according to the present invention has high tenacity, small pore sizes, concentrated distribution of pore sizes, great stability for coiling, and enabling high number of battery cycles. When used as a separator film, battery manufacturing safety and the service life of the battery being made can be increased.

The application relates to a preparation method and application of high-content nitrogen-doped porous carbon material. Tri-sodium citrate dihydrate and melamine are uniformly mixed and ground, the obtained solid mixture is placed in a tube furnace, and gradient heating is carried out under an inert gas atmosphere, the solid mixture is first heated from room temperature to 350-400 DEG C at a low speed, is kept for 1-5 hours, and is then rapidly heated to 600-800 DEG C for pyrolysis and carbonization, a high-nitrogen-content carbonized product is obtained, the carbonized product is washed by a hydrochloric acid solution, vacuum filtration and drying are carried out, and the high-content nitrogen-doped porous carbon material is prepared. The raw material is rich in source, cheap and easy to obtain, green and environment-friendly, the process is simple, the operation is convenient, and the high-content nitrogen-doped porous carbon material is easy to produce in large scale. The nitrogen-doped amount of the prepared high-content nitrogen-doped porous carbon material is as high as 11-14 at%, is obviously higher than that (5.81 at%) of a nitrogen-doped material prepared by direct carbonization, the specific surface area is large, the pore diameter is composed of micropores and mesopores, and the high-content nitrogen-doped porous carbon material is suitable for being used as an electrode material of a super capacitor.

The porous membrane laminate of the present application has a support layer having porosity and a porous membrane laminated on one side of the support layer and having polytetrafluoroethylene as a main component, the porous membrane being a uniaxially stretched material, the average pore diameter of the porous membrane being 25 nm or more and 35 nm or less, the maximum pore diameter of the porous membrane being 49 nm or less, and the average thickness of the porous membrane being 0.6 μm or more and 3.5 μm or less.

The application belongs to the field of sodium ion batteries, and particularly relates to a preparation method of a phenolic resin-based sodium ion battery hard carbon negative electrode material. The phenolic resin-based sodium ion battery hard carbon negative electrode material is prepared by adopting a foamed phenolic resin material as a hard carbon precursor material, and through carbonization, pore adjustment and carbon deposition, and the phenolic resin-based hard carbon negative electrode material with high capacity and high initial coulomb efficiency is obtained. The application utilizes the method that carbide is burned at high temperature under inert gas to achieve large-pore shrinkage, forms the graphitization structure change of the hard carbon material, and utilizes the pore adjustment method to expand the fine pores and open the closed pores, so that the carbon atom recombination is realized.