13results about How to "Change the pore structure" patented technology

The invention discloses a Sm-doped modified Ni / de-USY catalyst for ammonia hydrogen production. The Sm-doped modified Ni / de-USY catalyst is prepared from the following raw materials in percentage by mass: 97.82%-98.85% of a USY molecular sieve, 0.5%-1.4% of a nickel compound and 0.22%-0.79% of a samarium oxide. The invention also discloses a preparation method of the Sm-doped modified Ni / de-USY catalyst for hydrogen production from ammonia, which comprises the following steps: performing hydrothermal pretreatment on the USY molecular sieve, performing acid treatment, and preparing the catalyst for hydrogen production from ammonia by utilizing an ultrasonic-assisted equivalent-volume impregnation method. The catalyst for hydrogen production from ammonia can efficiently decompose ammonia gas and is high in hydrogen production efficiency, and due to the fact that active metal is highly dispersed on the de-USY surface, high relative crystallinity is kept, and the pore channel structure of the complete Y molecular sieve is kept, the catalyst for hydrogen production from ammonia has high stability, and the catalytic effect can be prevented from being affected.

The invention discloses a high-waterproof and high-moisture-permeability outdoor jacket fabric and a preparation method thereof, and relates to the technical field of fabrics. The preparation method comprises the following steps: step 1, preparation of the TPU film: preparing a spinning solution A and a spinning solution B containing different porous chitosan microsphere proportions; spinning the spinning solution A to obtain an inner layer; coating an aldehyde group modified porous chitosan microsphere solution on one side of the base membrane, spinning a spinning solution B on the surface of the base membrane by taking a coating surface as a receiving layer to obtain an outer layer, and drying to obtain a composite base membrane; putting the composite base membrane into a keratinase solution, and performing pretreatment; then coating a 3-sulfopropyl acrylate potassium salt mixed solution on the surface of the outer layer, and carrying out ultraviolet irradiation at room temperature; soaking in deionized water, and drying to obtain a TPU film; 2, the TPU film and the woven fabric are subjected to hot-pressing compounding, and the outdoor jacket fabric is obtained.

The invention discloses a preparation method of a novel composite carbon dioxide adsorbent, which comprises the following steps: pretreating calcium hydroxide with an organic acid, and then mixing and granulating with sodium hydroxide, potassium hydroxide and an indicator to obtain the adsorbent. Calcium hydroxide is pretreated with organic acid, the pore structure of calcium hydroxide is changed, the crystal size of the calcium-based adsorbent is reduced, and the specific surface area is increased, so that the adsorption performance of the adsorbent is improved. Through organic acid treatment, calcium hydroxide becomes fluffy and porous, the attenuation rate of the adsorption performance of the adsorbent after adsorbing carbon dioxide gas is reduced, calcium carbonate blockage is not prone to occurring in the carbon dioxide adsorption process of the adsorbent, and therefore the recycling performance of the adsorbent is improved, and the service life of the adsorbent is prolonged.

The invention provides an adsorbent with a heparin slow release function, a preparation method of the adsorbent and a hemoperfusion device, and belongs to the technical field of adsorbent resin. The preparation method comprises the following steps: firstly preparing epoxy group-containing cross-linked porous resin, then reacting with an amino acid compound, and carrying out amino acid grafting modification on the surface of the epoxy group-containing cross-linked porous resin by utilizing the reaction between an epoxy group and an amino group, so that the blood compatibility is improved, and the interaction between the adsorbent and blood components is changed; furthermore, the amino acid modified adsorption resin is cross-linked by using an amido-containing micromolecule cross-linking agent, so that on one hand, the cross-linking degree, the pore structure and the surface property of the adsorbent are changed, and the interaction between the adsorbent and heparin is adjusted, and on the other hand, the specific interaction with heparin is increased by introducing an amine group; the adsorbent has the performance of adsorbing heparin and slowly releasing the heparin, the clinical use amount and use frequency of the heparin are reduced, and the clinical treatment safety is improved.

The invention discloses porous carbon with a gradient structure, a preparation method of the porous carbon and application of the porous carbon in a negative electrode of a lithium ion battery. The porous carbon has a gradient structure with compact micropores on the surface and loose macropores inside. The preparation method of the porous carbon comprises the following steps: carrying out oleophylic modification on SiO2 to obtain hydrophobic SiO2; carrying out hydrophilic coating on NH4Cl to obtain PVP (Polyvinyl Pyrrolidone) coated NH4Cl; the preparation method comprises the following steps: mixing coal pitch, methylbenzene, oleic acid, hydrophobic SiO2 and PVP (at) NH4Cl to form a suspension; preparing a spherical precursor by a micro-fluidic emulsification method; and carbonizing, sequentially carrying out oxygen plasma treatment and HF solution etching, and removing the template to obtain the porous carbon with the gradient structure. The gradient distribution of the template and the pore-forming agent is realized through surface modification difference and a microfluidic technology, the pore structure and the particle size can be accurately regulated and controlled, the process is simple, the compatibility is high, the prepared porous carbon can be used as a substrate for a silicon-carbon composite negative electrode material, the volume expansion of silicon can be effectively buffered, and the service life of the silicon-carbon composite negative electrode material is prolonged. And the first coulombic efficiency, the specific capacity and the cycling stability of the lithium ion battery are improved.

The invention discloses a method for regulating and controlling the pore structure of an MOF (Metal Organic Framework) glass gas separation membrane, which is characterized in that the pore structure configuration of the MOF glass gas separation membrane can be changed on the basis of not changing the crystal structure of the MOF glass gas separation membrane by changing the variety and proportion of metal sources added in the preparation process and the variety and proportion of organic ligands. The preparation method comprises the following steps: performing solvothermal reaction to generate an MOF crystal film on a substrate in situ, melting the MOF crystal film under the protection of inert atmosphere, and cooling to obtain the MOF glass film with various pore structure distributions. According to the preparation and structure regulation and control method of the novel MOF glass gas separation membrane, the problem that the MOF glass pore structure is single is solved, and the application range of the MOF glass separation membrane material is greatly expanded.

This invention relates to the field of medical blood purification equipment technology, and discloses a lipid adsorption material regeneration device, including a main body, a rotary switching module, an adsorption column module, a dynamic pressure balancing system, a fluid pipeline system, and a main controller. The rotary switching module drives the adsorption column module to switch between three stations: treatment, regeneration, and balancing preparation. The adsorption column module is filled with pH-responsive hydrogel material to achieve adsorption and regeneration functions. The dynamic pressure balancing system forms a magnetic circuit through a magnetic piston and electromagnetic drive components in a bypass pipe, which senses and adjusts the pressure inside the column in real time. The fluid pipeline system controls the connection of input and output connectors via an electric push rod to achieve fluid switching. The main controller integrates data from multiple sensors, including pressure, pH, and optical sensors, to intelligently terminate the regeneration process. This invention achieves in-situ online regeneration of the adsorption material, continuous uninterrupted treatment, and precise closed-loop control, improving treatment efficiency and safety, and significantly reducing consumable costs.

The application discloses a kind of strong waterproof high moisture-permeable jacket fabric and preparation method thereof, it is related to fabric technical field.The preparation includes the following steps: step 1: the preparation of TPU film: the spinning solution A and spinning solution B containing different porous chitosan microspheres proportion are formulated;Spinning solution A is spun, and inner layer is obtained;Aldehyde group modified porous chitosan microspheres solution is coated on one side thereof, with the coating surface as receiving layer, spinning solution B is spun on the surface thereof, and outer layer is obtained, dried to obtain composite base film;The composite base film is placed in keratinase solution, pretreated;Then 3-sulfopropyl acrylate potassium salt mixed solution is coated on the surface of outer layer, and ultraviolet light is irradiated at room temperature;Immersed in deionized water, dried to obtain TPU film;Step 2: TPU film is hot-pressed with shuttle fabric to obtain jacket fabric.

The invention discloses a double oxidation-electrochemical oxidation combined process for treating garbage penetrating fluid, which comprises the following steps: pretreating the garbage penetrating fluid to obtain the pretreated garbage penetrating fluid; carrying out double oxidation treatment on the pretreated garbage penetrating fluid, and filtering to obtain treated fluid A; adding a porous spherical activated carbon adsorbent into the treating fluid A, uniformly mixing, standing, and carrying out air stripping treatment and filtration to obtain treating fluid B; and carrying out electrochemical oxidation on the treatment liquid B, standing, filtering and discharging. The garbage leachate treatment device is used for solving the technical problem that the garbage leachate treatment effect is poor.

The invention relates to the technical field of grape storage and fresh-keeping processes, in particular to a grape storage and fresh-keeping process based on microorganisms, which comprises the following steps: (1) pretreating grapes; (2) preparing a microbial culture solution; (3) preparing a preservative formula; (4) treating with a preservative; (5) packaging and storing, so that the storage period of the grapes is remarkably prolonged from traditional 3-4 weeks to 6 weeks or above, and meanwhile, relatively high sensory quality is kept; the growth of harmful microorganisms is effectively inhibited, and the total bacterial count and the mould yeast count are only increased to 2.69 and 2.18 lg CFU / g respectively after 6 weeks; the weight loss rate is obviously reduced, is only 3.08% after 6 weeks, and is 50% or above lower than that of a control group; the fruit hardness is effectively maintained, and the fruit hardness is still maintained at 3.52 N after 6 weeks; the retention rate of vitamin C is high, can still reach 90.2% after 6 weeks and is 30% or above higher than that of a control group; the overall sensory quality is excellent, and the overall acceptance score after 6 weeks reaches 8.0.

The application discloses a catalyst, a preparation method thereof and application of the catalyst in a reaction of preparing succinic anhydride by hydrogenation of maleic anhydride. The catalyst comprises the following components: a carrier and an active component supported on the carrier; the active component is Ni, and at least part of the Ni element exists in a Ni-N-C structure; the content of the Ni is 10-40 wt% and the content of the carrier is 60-90 wt% according to the total mass of the active component and the mass of the carrier being 100%. In the preparation process of the catalyst, a nitrogen-containing compound is added, and the nitrogen-containing compound forms the Ni-N-C structure with the Ni after the catalyst matrix is calcined, so that the pore structure of the catalyst is changed, and the catalyst performance is improved. The catalyst is applied to the reaction of preparing succinic anhydride by hydrogenation of maleic anhydride and has high maleic anhydride conversion rate and succinic anhydride selectivity.

The invention discloses a polyurethane composite material as well as a preparation method and application thereof, and relates to the technical field of noise reduction. The invention provides a polyurethane composite material. The polyurethane composite material is prepared from the following components in parts by weight: 100 parts of polyether polyol, 50 to 80 parts of diphenylmethane diisocyanate, 1 to 3 parts of simethicone, 30 to 40 parts of glass fiber, 200 to 400 parts of magnetic powder and 3 to 10 parts of deionized water. Wherein the magnetic powder is composed of magnetic powder of four specifications of A, B, C and D, the mesh number of the specification A is D1, and the specification A is the magnetic powder with 500 meshes < D1 < = 1000 meshes; the mesh number of the specification B is D2, and the specification B is magnetic powder of which D2 is greater than 250 meshes and less than or equal to 500 meshes; the mesh number of the specification C is D3, and the specification C is that D3 is more than 150 meshes and less than or equal to 250 meshes; the mesh number of the specification D is D4, and the specification D is that D4 is more than 80 meshes and less than or equal to 150 meshes. According to the prepared polyurethane material, the sound absorption performance of the composite material is further improved.

The invention discloses a rock modifier as well as a preparation method and application thereof, and belongs to the technical field of oilfield development. The rock modifier comprises a compound A, sodium persulfate, a cosolvent, a solvent and organic acid, and an oxidizing agent can promote the surface of rock to expose more-OH groups, especially the surface of small-pore rock; si-OH formed after the compound A is hydrolyzed reacts with Si-OH on the rock surface to generate Si-O-Si, and hydrophobic groups are left on the rock surface, so that the hydrophilicity of the rock surface is converted into hydrophobicity, the contact angle is reversed, the capillary force is converted into flow driving force from flow resistance, and bound crude oil in a formation pore throat is activated and begins to flow; when the fracturing fluid is injected into the stratum along with the fracturing fluid, the fracturing fluid can be prevented from immersing into a matrix reservoir, the flowback starting pressure of the fracturing fluid can be reduced, the fracturing fluid retained in small pores is promoted to flow back smoothly, the flowback rate of the fracturing fluid is increased, and the pollution of the fracturing fluid to the stratum is remarkably reduced.