62results about How to "High thermodynamic stability" patented technology

The invention relates to a liquid metal dual-network hydrogel patch with intelligent adhesion as well as a preparation method and application thereof, and belongs to the field of bioelectric sensing materials. By utilizing the characteristic that a polymer chain in the hydrogel has temperature-dependent phase change, the hydrogel is endowed with the advantages of intelligent adhesion and on-demand removal without pain and stimulation, and meanwhile, the hydrogel has good mechanical strength, is low in cost and convenient to operate, is suitable for large-scale production, popularization and application, and has wide application prospects. Wide application values are realized in the fields of wound dressings, postoperative care and the like.

The invention provides a polymer composite gel for heavy metal ion adsorption and a preparation method and application thereof, diatomite DE, chitosan CS, polyethyleneimine PEI and sodium alginate SA are used as raw materials, and polymer modification crosslinking is promoted through an ionic crosslinking method to form the composite gel. Compared with the prior art, SA is a biodegradable natural polysaccharide material, contains rich hydroxyl and carboxyl functional groups and is used as a controllable modification site, DE is used as an inorganic clay material, has a layered porous structure and contains rich active sites, and CS and PEI polymer surfaces have rich amino and hydroxyl groups and are used as ion adsorption sites. Meanwhile, PEI is used as a nucleation site and an ionic cross-linking agent to promote material modification and cross-linking to form composite gel. The composite gel is used as an ion adsorbent, can be adsorbed through chemical chelation between functional groups and ions, and can also be physically adsorbed through a porous structure, so that the composite gel shows efficient ion adsorption performance.

The invention discloses a remodelable polyguanidine urea material based on aromatic guanidyl amino acid as well as a preparation method and application thereof, and relates to the technical field of high polymer materials. The preparation method comprises the following steps: uniformly mixing a reaction system containing an aromatic guanidino amino acid monomer, a polyfunctional isocyanate compound and a solvent, firstly carrying out pre-reaction, removing the solvent, and then curing to obtain the remodelable polyguanidino urea material based on the aromatic guanidino amino acid. Aromatic guanidyl amino acid containing guanidyl and carboxyl functional groups reacts with polyfunctional isocyanate to form a guanidyl urea bond and an amido bond, so that the dynamic covalent polymer network structure material is formed, has excellent thermal stability and mechanical properties, is high in dynamic exchange speed, and can be applied to the field of chemical engineering. Rapid remodeling and reprocessing can be realized through a simple hot pressing method; meanwhile, the method has the characteristics of simple preparation method, no need of a catalyst through the action of multistage hydrogen bonds and non-covalent bonds in the structure, mild reaction conditions, strong operability, easiness in realization of industrial production and great application prospect.

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 provides an all-solid-state battery and application thereof. The all-solid-state battery comprises a positive pole piece and a negative pole piece, the negative pole piece comprises a sulfide solid electrolyte and a silicon-based active material, the silicon-based active material comprises monatomic silicon, and the median particle diameter D50 of the monatomic silicon is 1 nm to 1 [mu] m; and the solid electrolyte membrane is arranged between the positive pole piece and the negative pole piece, and the solid electrolyte membrane comprises the sulfide solid electrolyte. According to the all-solid-state battery and the application thereof provided by the invention, the weight and volume energy density of the battery can be ensured, the volume expansion effect of a silicon material is effectively improved, the interlayer interface influence of the negative pole piece and the solid electrolyte membrane is relieved, and the cycle performance and the safety of the all-solid-state battery are improved.

The invention discloses a preparation method of an efficient and stable TiNi alloy-based porous composite structure electro-catalysis electrode, and relates to a preparation method of an electro-catalysis electrode. The invention aims to solve the problem that the existing hydrogen evolution electro-catalysis electrode cannot simultaneously have high hydrogen production efficiency, low cost and excellent stable performance. The preparation method comprises the following steps: 1, pretreating the sodium metaaluminate pore-forming agent; 2, ball-milling and mixing; (3) preparing a porous TiNi-based alloy; and 4, compounding a catalytic active layer. The method is used for preparing the efficient and stable TiNi alloy-based porous composite structure electro-catalysis electrode.

The invention provides a preparation method of a high-entropy iron-aluminum layered double hydroxide loaded iron-sodium catalyst and an application of the catalyst in carbon dioxide hydrogenation catalyst.The preparation method comprises the steps that a one-step co-precipitation method is adopted, metal salts of six elements are stirred in deionized water, then a mixed solution of sodium carbonate and sodium hydroxide is dropwise added for precipitation, and the high-entropy iron-aluminum layered double hydroxide loaded iron-sodium catalyst is obtained; and then washing and drying, and finally calcining at low temperature to form a high-entropy iron-aluminum layered double hydroxide as a carrier. And carrying out ball-milling calcination on nitrate of ferrum and sodium and the prepared carrier to obtain the high-entropy ferrum-aluminum layered double hydroxide loaded ferrum-sodium catalyst. The prepared catalyst has a large specific surface area and high dispersity, and the catalytic activity is improved. According to the finally prepared high-entropy iron-aluminum layered double hydroxide loaded iron-sodium catalyst, CO2 and H2 are introduced, and high-value chemicals such as olefin and the like can be prepared.

The invention provides ATP / CCS / SA-PEI aerogel as well as a preparation method and application thereof, attapulgite ATP, carboxylated chitosan CCS, polyethyleneimine PEI and sodium alginate SA are adopted as raw materials, and polymer modification and crosslinking are promoted through an ionic crosslinking method to form the aerogel. The preparation method comprises the following steps: firstly, adding a prepared CCS solution into an SA solution to obtain a CCS / SA solution; the preparation method comprises the following steps: adding a CCS solution into a reaction kettle, adding an ATP suspension, finally adding a PEI solution, uniformly mixing, pouring into a plastic mold, freeze-drying, cross-linking, washing with water, and freeze-drying again to obtain the ATP / CCS / SA-PEI aerogel. The aerogel prepared in the invention has the advantages of large specific surface area, many adsorption groups, good adsorption performance on dye pollutants and heavy metal ions, good thermal stability, reusability, and good application value in the removal of dye pollutants and heavy metal ions in sewage.

The invention belongs to the technical field of batteries, and discloses a high-nickel oxide positive electrode material with a two-phase symbiotic structure and a preparation method, the unique two-phase symbiotic structure can effectively inhibit the violent change of the unit cell volume in the charging and discharging process, and the mechanical stability of the material is improved; a spinel structure is controllably constructed in advance, so that the reaction activity of the material can be effectively reduced, and the thermodynamic stability is improved, thereby inhibiting uncontrollable interface side reaction, oxygen release and irreversible phase change; due to the nanocrystallized particle morphology, faster lithium ion transmission can be realized, and the rate capability of the material is improved; the one-step spray pyrolysis method has the advantages of simple process, rapid reaction, no need of complex steps of coprecipitation, filtration, washing, crushing, calcination and the like, no generation of wastewater, great improvement of the production efficiency and reduction of the cost.

The invention discloses a bio-based polyamide nanofiltration membrane and application thereof, and belongs to the technical field of synthesis of bio-based polyamide nanofiltration membranes and purification of 5-hydroxymethylfurfural and 2, 5-furandicarboxylic acid. According to the invention, 2, 5-dimethyl furandicarboxylate and hexamethylenediamine are used as raw materials, polydimethyl furandicarboxylate hexamethylenediamine prepared by an amine ester exchange method is used as a film-forming polymer, and a solution phase inversion method is further adopted to prepare the bio-based polyamide nanofiltration membrane polydimethyl furandicarboxylate hexamethylenediamine membrane. The method has the advantages that 5-hydroxymethylfurfural and soluble humin can be selectively separated by the aid of the method, impurities in 2, 5-furandicarboxylic acid sodium salt aqueous solution can be separated, and accordingly the high-purity 5-hydroxymethylfurfural and 2, 5-furandicarboxylic acid can be prepared.

The invention provides an organic compound, a preparation method thereof and an organic electroluminescent device, and belongs to the technical field of luminescent materials, and the organic compound has a structure as shown in a general formula I. The organic compound is used as a luminescent auxiliary material, can effectively improve the luminescent efficiency and stability of the organic electroluminescent device, and has good application prospects. The service life is prolonged, the driving voltage is reduced, and the device is endowed with more excellent comprehensive performance.

The present application relates to the technical field of high molecular antifogging coating, and particularly relates to a supermolecular coated shed film antifogging coating solution, a preparation method and application thereof, wherein acrylic acid, acrylamidoalkyl sulfonic acid, hydroxyalkyl acrylate and double-ene crosslinking monomer are used for tetra-copolymerization to construct a supermolecular matrix with carboxyl, sulfonic acid group, hydroxyl side group and crosslinking network, and a spandex antifogging agent is introduced in situ in the matrix, hydrogen bond and hydrophobic association synergistic effect between the side group functional groups and the spandex molecules are used to realize supermolecular coating, and then pH adjustment and functional additive compounding are performed to obtain the coating solution. The present application solves the problems of easy migration and precipitation of the traditional antifogging agent, coating brittleness, short effective period, and the obtained coating has comprehensive performances of long-acting antifogging, high light transmission, strong adhesion, flexible and bending-resistant, water-resistant and aging-resistant, and room temperature rapid curing, and is suitable for antifogging treatment of various agricultural shed films and greenhouse transparent materials.

The invention discloses a direct cross-coupling method of benzyl sulfonium salt and thiosulfonate, and belongs to the technical field of organic compound synthesis. The benzyl sulfonium salt and the sulfo-sulfonate react in the solvent under the action of the metal, and sulfonium alkane products with various structures are obtained at medium to good yield. According to the reaction, the benzyl sulfonium salt easy to synthesize is used as a coupling substrate, thiosulfonate is used as a substitute of mercaptan, risks such as stink in the operation process are avoided, meanwhile, the benzyl sulfonium salt can be stored at room temperature, shows excellent thermodynamic stability, and is very safe and easy to prepare compared with other electrophilic reagents. The preparation method disclosed by the invention has the characteristics of mild reaction conditions, simple post-treatment, green steps, low pollution, high economic benefits and the like.

The application relates to the technical field of organic light-emitting display, and discloses a cyano-substituted aryl ring-connected triazine compound and application thereof. The cyano-substituted aryl ring-connected triazine compound has a structure as shown in formula (I), the compound provided by the application has high bond energy between atoms, good thermal stability, is conducive to solid-state stacking between molecules, is conducive to injection and migration of excitons, can effectively reduce the driving voltage of an organic electroluminescent device when used as an electron transport material, improves the light-emitting efficiency of the organic electroluminescent device, and prolongs the service life of the organic electroluminescent device. Meanwhile, the cyano substitution can adjust the energy level of the compound, the HOMO and LUMO energy levels are deepened, the compound is more matched with adjacent layers, and the device voltage is reduced. The application further provides an organic electroluminescent device and a display device containing the compound of formula (I).

The invention relates to the field of batteries, and provides an electrochemical device, the electrochemical device comprises a positive plate, a negative plate, a diaphragm and an electrolyte, the negative plate comprises a negative current collector and a negative paste layer located on at least one side surface of the negative current collector, the negative paste layer comprises a negative active material, the negative active material comprises a silicon-based material, and the silicon-based material is a silicon-based material. The electrolyte comprises a first additive, the first additive contains Zn and Ca, Zn and Ca are from a substance A and a substance B, the substance A comprises bis [bis (perfluoroalkylsulfonyl) imine] zinc and / or bis [bis (perfluoroalkylsulfonyl) imine] calcium, and the substance B comprises perfluoroalkyl zinc sulfonate and / or perfluoroalkyl calcium sulfonate. Zinc salt and calcium salt of bis [bis (perfluoroalkyl sulfonyl) imine] group and perfluoroalkyl sulfonyl group are introduced into electrolyte in an electrochemical device containing a silicon negative electrode, so that the surface and bulk phase stability of the silicon negative electrode is improved, the service life of the battery is prolonged, and the electrochemical performance of the battery is improved.

The present invention relates to an organic boron compound and its application in an organic electroluminescent device, belonging to the technical field of optoelectronic materials. The compound is composed of a main body formed by bonding imidazopyridine with nitrogen groups such as aromatic amine, carbazole, and acridine, and the main center is modified by boron, and has a rigid large conjugated structure. Due to the bipolar imidazopyridine group regulating the electrical supply / acceptance of the compound, the HOMO of the compound is reduced. The device prepared by using the compound as a light-emitting layer material exhibits stable and efficient deep blue light emission, and has achieved significant progress in driving voltage, current efficiency, light color and life.

This invention provides a photoresponsive, deformable liquid crystal polyurethane material containing cyanostilbene, its preparation method, and its applications, belonging to the field of intelligent polymer materials technology. This invention introduces cyanostilbene liquid crystal units into a polyurethane system via short-chain spacer groups. Utilizing the characteristics of cyanostilbene under ultraviolet light irradiation (requiring trans / cis isomerization), its photothermal effect, the stability of the cis isomer structure, and the ability of the cis isomer to lower the glass transition temperature of the polymer, as well as the strong coupling effect between the cyanostilbene liquid crystal units and the main chain, a photoresponsive, deformable liquid crystal polyurethane material with high mechanical properties, high processability, high deformation rate, large deformation degree, and strong photostress can be prepared. This photoresponsive, deformable liquid crystal polyurethane material has wide applications in fields such as micro-optically driven robots, artificial muscle flexible actuators, and 4D-printed programmable deformable structures.

The invention discloses a method for increasing the heat-resistant temperature of a pure aluminum conductor, and belongs to the technical field of performance improvement of the pure aluminum conductor. The method adopts a powder extrusion sintering process, and specifically comprises the following steps: carrying out high-energy ball milling on pure aluminum powder by taking ethanol and / or dry ice as an anti-forging agent to obtain superfine pure aluminum powder with the average grain size of 100-250 nm, clean surface and high activity, carrying out isostatic pressing on the superfine pure aluminum powder to obtain a preformed blank, and carrying out hot extrusion sintering on the preformed blank to obtain a high-strength aluminum rod, and carrying out front end grinding, deflashing, heat treatment, wire drawing and annealing treatment on the high-strength aluminum rod to obtain the pure aluminum conductor. The pure aluminum conductor has the beneficial effects that the prepared pure aluminum conductor is high in yield strength and tensile strength, the heat-resistant temperature is increased to 300 DEG C from 200 DEG C at present, and the pure aluminum conductor is a high-strength extra-heat-resistant pure aluminum conductor and is expected to be applied to extra-high voltage transmission line construction on a large scale.

The application belongs to the technical field of batteries, and particularly relates to a gel electrolyte, a preparation method and a lithium ion battery; the gel electrolyte comprises a polymer matrix in which two-dimensional layered nanosheets are uniformly intercalated in situ, and an ionic liquid loaded in the polymer matrix; a solute of the ionic liquid comprises an electrolyte lithium salt, and a solvent of the ionic liquid comprises vinylene carbonate; in the technical scheme provided by the embodiment of the application, a new gel electrolyte is obtained by intercalating two-dimensional layered nanosheets in a polymer matrix in situ, the ionic conductivity of the gel electrolyte is improved by improving the gel electrolyte, and the conductivity of the gel electrolyte reaches 10 ‑3 S / m, thereby avoiding dendrites formed by lithium ion deposition from piercing a passivation film, directly improving the thermodynamic and electrochemical stability of the gel electrolyte, and widening the working voltage and temperature range of the battery.

The present disclosure relates to polyquinoxalines containing basic groups, which are obtained by copolymerization of a dioxinone monomer and a tetramine monomer. The present disclosure also relates to proton exchange membranes formed from the polyquinoxalines containing basic groups. The polyquinoxalines containing basic groups provided by the present disclosure have excellent mechanical strength, thermal stability, chemical stability and phosphoric acid doping rate, while having site-controllable basic groups, and have broad application prospects.

The invention provides a silicon carbide tray for rapid heat treatment and a rapid heat treatment method.The silicon carbide tray for rapid heat treatment comprises a silicon carbide base disc, and the silicon carbide base disc is provided with at least three sets of cooling table limiting openings, wafer limiting columns and through holes; the cooling table limiting opening, the wafer limiting column and the through hole are respectively arranged on the silicon carbide basal disc at equal intervals, the distance between the cooling table limiting opening and the center of the silicon carbide basal disc is a, the distance between the wafer limiting column and the center of the silicon carbide basal disc is b, and the distances between the through hole and the center of the silicon carbide basal disc are c and egt; bgt; c. According to the invention, silicon carbide is made into a tray for rapid heat treatment with a special structure, so that the wafer heating uniformity can be improved, the edge effect and the pattern loading effect in the wafer heating process are reduced, and an oxidation film with higher quality is obtained.

The invention relates to the technical field of air bricks, in particular to an anti-erosion air brick and a preparation process thereof, and the anti-erosion air brick comprises the following components: fused magnesite particles, crystalline flake graphite, modified zirconia fine powder, metal aluminum fine powder, boron carbide fine powder and phenolic resin. According to the invention, through modified titanate and modified boric acid, a composite coating layer is constructed on the surface of zirconium oxide, and a titanium dioxide compact layer is generated in situ by using a titanium component at a high temperature, so that erosion of calcium oxide in slag is blocked; meanwhile, the boron component forms a high-melting-point phase to fill grain boundary pores, and slag permeation and harmful dendritic crystal precipitation are inhibited, so that the structural stability and slag corrosion resistance of the air brick are improved.

The invention relates to a Mn-based contrast agent and a preparation method and application thereof, and the preparation method comprises the following steps: 1) dissolving deferasirox or a derivative thereof in water to obtain a solution a; (2) adding an aqueous solution of manganese salt into the solution a, and sequentially stirring, dialyzing and freeze-drying to obtain a Mn-based complex; 3) dissolving the Mn-based complex in water to obtain a solution b; and 4) adding an aqueous solution of human serum protein into the solution b, and sequentially stirring and performing ultrafiltration to obtain the Mn-based contrast agent, the structural general formula of deferasirox or the derivative thereof is as follows: # imgabs0 #, wherein R is carboxyl or carboxylic acid methyl ester group. Compared with the prior art, the preparation method disclosed by the invention is simple in synthesis process, low in energy consumption and good in environmental compatibility, and the prepared Mn-based contrast agent has relatively high relaxation rate, excellent thermodynamic stability and good biocompatibility and can be used as a T1 magnetic resonance imaging contrast agent for magnetic resonance imaging.

This application provides a steel material for reactors and a method for preparing the same. The steel material for reactors includes a steel substrate and a protective coating. The protective coating includes an in-situ oxide layer on the surface of the steel substrate and an alumina layer on the in-situ oxide layer. The in-situ oxide layer includes α-Fe₂O₃, and the alumina layer includes α-Al₂O₃. In the steel material for reactors, the α-Fe₂O₃ in the in-situ oxide layer serves as a growth template for the alumina layer. Through the mutual matching and induction effect of crystal structures, the protective coating forms a dense protective barrier on the surface of the steel substrate, effectively reducing the permeation of hydrogen and its isotopes deuterium and tritium.

The application provides a traditional fluorescent aromatic phosphorus material with a pyrene imidazole structure. The material can ensure effective energy transmission, realizes simultaneous transmission of hole and electron carriers, is beneficial to design of a device and improvement of performance, can be used for preparing an ultra-low voltage driven high-efficiency traditional blue-violet light emitting device, has good thermodynamic stability, and significantly improves luminous efficiency and brightness of an organic electroluminescent material.

The invention belongs to the technical field of medical imaging, and discloses a gallium-based radioactive contrast agent with glycosylation-modified maltotriose covalently linked with a chelating group as well as a preparation method and application of the gallium-based radioactive contrast agent. The preparation method comprises the following steps: firstly, modifying a cyclic polydentate ligand, carrying out nucleophilic substitution, then connecting an upper half flexible chain or loop chain, and then carrying out glycosylation on acetyl protected maltotriose to connect a sugar part half flexible chain or loop chain; the preparation method comprises the following steps: preparing a polydentate ligand, carrying out reductive amination or urea condensation connection on aldehyde groups or aldehyde groups on half-chain end groups on two sides to form a whole, adding methanol and a sodium methoxide solution, removing acetyl of sugar, adding trifluoroacetic acid to remove protective groups on the polydentate ligand, and finally adding 68Ga for chelation to obtain a final product. And maltotriose is adopted as a guiding group, so that higher bacterial specificity and permeability are achieved, and the distinguishing degree in diagnosis of bacterial infection is higher.

This invention discloses a ternary amorphous insulating dielectric film, its preparation method, and its applications. The ternary amorphous insulating dielectric film is composed of a material with the chemical formula Al(X)N, ​​where X is selected from any one or a combination of two or more of B, Si, Zr, and Zn. The ternary amorphous insulating dielectric film has a disordered amorphous structure. This invention uses pulsed laser deposition technology to prepare the ternary amorphous insulating dielectric film. The preparation method is simple and controllable. The prepared ternary amorphous insulating dielectric film exhibits high thermodynamic stability, high dielectric constant, and low leakage current density. It can serve as an insulating material resistant to repeated impacts from strong electric fields and high currents, and is heat-resistant, showing great promise for applications in the semiconductor field.

This invention discloses a heat-stable bovine alpha-interferon mutant, the amino acid sequence of which is shown in SEQ ID NO.7. The mutant introduces cysteine ​​mutations at amino acid positions 55 and 112, forming an S55C+L112C disulfide bond, compared to wild-type bovine alpha-interferon; the amino acid sequence of wild-type bovine alpha-interferon is shown in SEQ ID NO.1. This invention is the first to propose a disulfide bond modification scheme for bovine alpha-interferon that balances heat stability and antiviral activity, adapted to the Pichia pastoris high-efficiency secretory expression system. The modified mutant exhibits 14.7-fold increased antiviral activity compared to the wild type. At 56°C for 1 hour, the mutant shows significantly improved heat resistance, with an antiviral activity reaching 1.0 × 10⁻⁶. 7.0 IU / ml. The activity is stable after long-term storage at room temperature or 37°C. After storage at room temperature for six months and at 37°C for two months, the antiviral activity still retains 1.0 × 10⁻⁶. 6.0 IU / ml, thus solving the problems of poor stability, easy inactivation under high temperature conditions, and difficulty in transportation at room temperature of wild-type bovine alpha-interferon.

This invention belongs to the field of pharmaceutical chemistry, specifically relating to a lasmidetane-terephthalic acid salt and its preparation method. The crystal form of this salt consists of two molecules of lasmidetane and two molecules of terephthalic acid as basic units. This crystal form exhibits high chemical stability and significantly improves the dissolution rate of lasmidetane, meeting the stringent requirements of formulation development for the dissolution and absorption of the active ingredient. Furthermore, the preparation method is simple and suitable for industrial production.

The application discloses a sodium ion battery positive electrode material and a preparation method thereof. By adding cheap, non-toxic, environment-friendly and easily-degradable water-soluble cellulose as an additive, the growth of a specific crystal direction can be inhibited. The hydrophilic group of the water-soluble cellulose can change the coordination environment of metal ions and reduce the entry of water molecules into the crystal lattice. In addition, by introducing the water-soluble cellulose, high-concentration reactant feeding can be realized, which is beneficial to reducing the consumption of industrial water. Meanwhile, compared with other existing additives, the water-soluble cellulose is environment-friendly, easily-degradable, low in production and separation cost, and free of toxic by-product generation. The prepared open three-face cubic Fe-based Prussian blue analogue material is good in dispersity, high in purity and uniform in morphology, and as a sodium ion battery positive electrode material, has a reversible capacity of 155.40 mAhg ‑1 at 0.1C (1C=170 mAhg ‑1 ) and a first discharge coulombic efficiency of 97.83%.