14results about How to "Stable decomposition" patented technology

The invention discloses a preparation method and application of a high-activity-site polyion liquid catalyst, and belongs to the field of green catalytic synthesis. The preparation method comprises the following steps: introducing imidazole on an amine-functionalized ionic liquid through an aldehyde-amine condensation method, introducing dipyridine through free radical polymerization, and finally introducing metal zinc through a method of metallization after synthesis to synthesize the polyionic liquid catalyst with Lewis acid-base sites, nucleophilic reagent sites, hydrogen bond donors and carbon dioxide adsorption sites. Compared with the prior art, the catalyst has multiple active sites, the synthesis method is simple, the product is easy to separate, and the catalyst has excellent performance in catalysis of cycloaddition reaction of carbon dioxide and epoxypropane.

The invention relates to the technical field of macromolecular polyethylene foaming materials, and discloses a gel network supported chemical foaming agent as well as a preparation method and application thereof. The gel network supported chemical foaming agent contains a gel network carrier and azodicarbonamide supported on the gel network carrier, and based on the total weight of the gel network supported chemical foaming agent, the content of the azodicarbonamide is 10-40 wt%, and the content of the gel network carrier is 60-90 wt%. The gel network supported chemical foaming agent has the advantages of lower initial foaming temperature, controllable decomposition process, smaller cell size and better application value.

The invention relates to the technical field of electrocatalysis, in particular to an oxygen / sulfur heterostructure oxygen evolution electrocatalyst and a preparation method and application thereof. Based on an in-situ oxidation strategy, a CuFeO layer is generated on the surface of CuFeS, and the CuFeS-coated CuFeO high-performance oxygen evolution electrocatalyst with a heterostructure is obtained. By constructing a sulfide-oxide heterojunction, a built-in electric field can be formed at an interface to promote charge separation and transfer, so that the electrocatalytic activity is remarkably improved. And on the other hand, the CuFeO layer on the outer layer serves as an armor, and the problem of oxidation of the surface of CuFeS is solved. The electro-catalytic performance and the long-term stability are obviously improved.

The present invention discloses an antibacterial and procoagulant pneumothorax sealing patch and a preparation method thereof. The antibacterial and procoagulant pneumothorax sealing patch comprises, from top to bottom, an outer protective layer, a dressing layer and a sealing adhesive layer; the dressing layer is prepared from a composite of dialdehyde carboxymethyl chitosan and tannic acid, and then the dialdehyde carboxymethyl chitosan in the composite is grafted with acrylic acid, and then cross-linked to form a hydrogel. The pneumothorax sealing patch provided by the present invention can improve the antibacterial and procoagulant abilities of the pneumothorax sealing patch by adding tannic acid, and enhance the hemostatic ability and overall performance of the pneumothorax sealing patch according to the structure of the hydrogel.

The present invention provides a kind of heat-resistant and salt-resistant anti-swelling clay stabilizer and its preparation method and application, the present invention is by first reacting 2,3,6,7-naphthalenetetracarboxylic acid dianhydride with composite isomeric alcohol, carboxylic anhydride group ring-opening and isomeric alcohol hydroxyl reaction, then the carboxyl on the product reacts with dimethylamino chloroethane, connects dimethylaminoethyl, and finally reacts with bromine-containing heterocyclic compound, generates heterocyclic clay stabilizer. The clay stabilizer structure of the present invention contains high temperature resistant benzene ring and heterocyclic group, and introduces long-chain alkyl by composite isomeric alcohol, which helps to improve the thermal stability and salt tolerance of clay stabilizer, improves stabilizer to suppress clay hydration expansion rate and suppress shale hydration dispersion ability. The clay stabilizer of the present invention can keep stable and will not decompose under the conditions of 280 ℃ and mineralization degree of 230000mg / L, and can be applied to high temperature resistant clay stabilizer used for anti-swelling of high temperature and high salt reservoir in oil field development.

The invention provides a synthetic microbial community and application thereof in degradation of trehalose and biofuel cells, and belongs to the technical field of synthetic microbiology and biological energy. A synthetic microbial community is constructed by means of synthetic biology, the synthetic microbial community comprises genetic engineering escherichia coli and shewanella, and the synthetic microbial community can realize a complete metabolic pathway from trehalose to acetic acid and an efficient electron transport chain; the method can be used for treating trehalose-rich wastewater or wastes and the like; the synthetic microbial community can be used for a microbial fuel cell, can stably generate current density and power density which are higher than those of a single strain or a natural mixed flora in the microbial fuel cell, and has good practicability.

The present application relates to air purification technical field, especially to a kind of purification equipment for removing coating formaldehyde, including shell, mounting plate fixedly connected in the cavity of shell.The present application is provided with self-cleaning mechanism, driving motor drives scraper to rotate around filter assembly, and cooperate with spiral conveying roller, dust scraped is automatically transported into collection box, realize the automatic cleaning of filter screen surface, effectively avoid filter screen blockage, ensure the persistence of filtering efficiency, by setting air flow guiding mechanism, servo motor drives rotating ring, on the one hand, drive fan blade to rotate, form auxiliary air flow, enhance air flow, on the other hand, through swing component drive air jet cylinder up and down swing, make air flow evenly into air duct, prolong the residence time and contact area of air flow in photocatalyst area, by setting photocatalyst decomposition mechanism, UV lamp irradiates photocatalyst coating in air duct, improve the purification efficiency and thoroughness of formaldehyde.

The utility model discloses garbage leachate treatment equipment, it includes base, the top fixedly connected with marsh gas pool of base, the inside fixedly connected with a plurality of racks of marsh gas pool, the inside engagement connection has first gear of rack, the inside fixedly connected with first drive link of first gear, the output fixedly connected with first motor of first drive link, the outside rotary connection has connecting rod of first drive link. Through above -mentioned structure, through the drive of first motor cooperation first drive link drives the rotation of external first gear, and first gear moves under the action of external rack, thereby first drive link drives the movement of external connecting rod, and connecting rod drives the movement of external top cap, and the top cap is sealed to marsh gas pool, and this can isolate the outside air, especially oxygen enters the pool body, avoids the metabolic activity of oxygen to inhibit anaerobic bacteria group, ensures that the organic matter decomposition process stably carries out, thereby improves marsh gas production.

The invention provides a hot-melt drug release stent, and relates to the technical field of medical instruments. The hot melting coating is arranged on the bracket body; the medicine layer is arranged on the hot melting coating; the wrapping layer is arranged on the hot melting coating and wraps the medicine layer; a heating assembly is arranged in a cavity formed by the stent body, the heating assembly heats the stent body, and the resistance block transfers heat to decompose the hot melting coating so as to release medicine. According to the drug stent, the hot melting coating, the drug layer and the wrapping layer are arranged, the heating assembly is used for heating the resistance block, heat of the resistance block is conducted to the hot melting coating to promote decomposition of the hot melting coating, then the drug layer is released and makes direct contact with the lesion position, proliferation of cells at the lesion position is inhibited, and after the function is completed, the stent body of the drug stent can be withdrawn, so that the drug stent is convenient to use. And the implant is not left in vivo like a permanent implant for a long time, so that the risk of long-term foreign body reaction and complication is reduced.

The invention discloses a compound, an electrolyte and application thereof. The compound has a structure as shown in a formula I in the specification. The electrolyte comprises an organic solvent, a lithium salt and an additive, the lithium salt comprises LiPF6, and the additive comprises a compound as shown in a formula I. According to the compound disclosed by the invention, pyridine is taken as a parent body, N has weak alkalinity and can moderately inhibit the acidity of an electrolyte and reduce the generation of HF (Hydrogen Fluoride); according to the present invention, the lithium ion battery electrolyte can be used for neutralizing PF5 derived from the decomposition product of LiPF6, stabilizing the decomposition product PF5 and rapidly forming the stable protection film through the acid-base coordination reaction under the certain condition, can ensure the low resistance, can be used for the lithium ion battery electrolyte, can improve the high-temperature cycle performance and the high-temperature storage performance of the battery, and can be used for the lithium ion battery electrolyte, such that the lithium ion battery electrolyte can be used for the lithium ion battery. And the DCR increase in the later period of battery circulation can be reduced.

The invention provides a liquid-liquid interface in-situ growth heterojunction and a preparation method thereof, and belongs to the technical field of semiconductor thin film materials. Gallium atoms on the surface of liquid metal gallium react with oxygen in the atmospheric environment to generate an amorphous gallium oxide thin film; then putting the gallium oxide thin film into a metal nitrate and hexamethylenetetramine precursor solution which is prepared in advance, and growing a layer of metal oxide on the gallium oxide thin film in situ through chemical bath deposition to form a heterojunction; a gallium oxide thin film is formed on the surface of liquid metal gallium to serve as a growth substrate, then metal oxide grows on the gallium oxide thin film in situ, cleanliness and high quality of a heterojunction interface are ensured, the high-quality interface is beneficial to reducing interface defects, and therefore the overall performance of a heterojunction device is improved; in the preparation process, the in-situ growth of the metal oxide on the gallium oxide film can be realized without expensive instruments and strict growth environment, and the method has the characteristics of simplicity in operation, economy and wide application range.

This application relates to a method, system, device, and medium for decomposing ultra-large-scale graph matrices. The method adaptively determines the upper limit of the spectral interval by extracting the degree distribution and community structure of the graph, and constructs a Chebyshev filter accordingly to filter the initial vector to amplify the target feature gap. Using the filtered vector as the starting block, block Lanczos iteration is performed to obtain Ritz values ​​and approximate eigenvectors. Convergence is determined based on the Ritz value gap and residuals. When stagnation occurs, the spectral interval is dynamically corrected based on the Ritz value distribution, and the filter is reconstructed. The approximate eigenvectors are then filtered again to restart the process, forming an estimation-filtering-convergence closed loop. Thus, the online spectral interval estimation, Chebyshev acceleration, and deep block Lanczos work together to suppress spectral radius overflow and eigenvector pseudo-alignment caused by extreme eigenvalues, overcoming convergence stagnation and achieving stable and efficient large-scale graph decomposition.

The invention relates to a negative electrode plate for a secondary battery, the negative electrode plate comprises a negative electrode current collector and a negative electrode material layer, the negative electrode material layer is arranged on the surface of the negative electrode current collector, and the negative electrode material layer comprises a negative electrode active material and carboxylic acid lithium-based polyether. According to the lithium carboxylate-based polyether, a three-dimensional network is formed on the surface of a negative electrode active material, so that the problem of gas production during high-temperature storage is solved, cracking of silicon in the negative electrode material can be inhibited, and side reactions are reduced.

The present invention provides a nickel-tungsten alloy electrodeposition solution and an electrodeposition process. The nickel-tungsten alloy electrodeposition solution is prepared by dissolving nickel sulfate, sodium tungstate, sodium pyrophosphate, a brightener, and a stabilizer in deionized water. The nickel-tungsten alloy electrodeposition solution has excellent corrosion resistance and wear resistance, and the service life of the electrodeposition solution is long, the production cost is reduced, and the electrodeposited nickel-tungsten alloy coating is bright and dense.