27results about How to "High thermodynamic stability" patented technology

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 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).

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 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 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.

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 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%.

The invention provides a triarylamine compound containing a benzimidazole structure and an organic electroluminescent device, and relates to the technical field of organic photoelectric materials. When the triarylamine compound is applied to the organic electroluminescent device as a main body material, the driving voltage of the organic electroluminescent device can be reduced, the luminous efficiency and brightness of the organic electroluminescent device can be improved, and the service life of the organic electroluminescent device can be prolonged.

The application provides a single-crystal nickel-cobalt-manganese positive electrode material, a preparation method, a positive electrode sheet and a lithium ion battery. The preparation method comprises the following steps: mixing a nickel-cobalt-manganese precursor, a lithium source and a first additive, first sintering to obtain a first sintered material; mixing the first sintered material and a second additive, second sintering to obtain a second sintered material; mixing the second sintered material and a third additive, third sintering to obtain the single-crystal nickel-cobalt-manganese positive electrode material; the half-peak width a of the (001) crystal face of the nickel-cobalt-manganese precursor and the half-peak width b of the (100) crystal face satisfy the following conditions: 0.30 <= a <= 0.48, 0.38 <= b <= 0.52, and 1.1 <= b / a <= 1.5. The roundness of the single-crystal nickel-cobalt-manganese positive electrode material and the half-peak width of the nickel-cobalt-manganese precursor are combined and quantified, the nickel-cobalt-manganese precursor is screened, and the single-crystal nickel-cobalt-manganese positive electrode material with high roundness and stable structure is prepared by combining the three sintering systems.

A method for preparing an ammonia nitrogen-rejecting reverse osmosis membrane based on a support layer with controllable amination degree is disclosed. This invention aims to address the problem of poor selective separation performance of ammonia nitrogen in reverse osmosis membranes prepared based on inert support layers. The method comprises: 1. Synthesizing APAEPO polymer with controllable amination degree; 2. Preparing a polymer support layer with controllable amination degree using a solvent-inducible phase inversion method; 3. Preparing an ammonia nitrogen-rejecting reverse osmosis membrane using interfacial polymerization. This invention allows for flexible control of the membrane's ammonia nitrogen rejection rate (92.2%~99.1%) and water flux by adjusting the amination degree of the support layer (0-80%), meeting the needs of different reclaimed water treatment scenarios (such as low-ammonia nitrogen wastewater reuse and high-ammonia nitrogen wastewater deep purification), thus having a wide range of applications. The preparation process of the amination polymer in this invention does not require the introduction of toxic modifiers, the polymerization reaction conditions are mild, secondary pollution is minimal, and it can be directly industrialized.

The application discloses a kind of alginate-based high-entropy metal oxides and preparation method and application thereof, belong to gas sensor material technical field.The application uses the high-entropy metal salt solution of at least five kinds of metal sources and alginate solution is mixed, and alginate-based high-entropy metal aerogel is prepared, and then carbon cloth is wrapped, and nanometer sheet-shaped alginate-based high-entropy metal oxide is obtained by using Joule heating method rapid heating.The material can be used for high-sensitivity detection of ethanol gas.The preparation method in the application is green, simple, fast, has good sensing response effect in ethanol gas detection, and the sensing material has good stability, can be recycled multiple times, and has good application prospect.

The invention discloses a method for improving the intrinsic enthalpy value of a cross-linked polyurethane solid-solid phase change material through thermomechanical programming, and belongs to the technical field of heat energy management. Aiming at the problem that the energy storage density of an existing cross-linked polyurethane solid-solid phase change material is far lower than a theoretical level due to low intrinsic latent heat enthalpy value of the existing cross-linked polyurethane solid-solid phase change material, thermomechanical programming is carried out by utilizing dynamic covalent bond characteristics of carbamate bonds in polyurethane; the molecular chain segments are driven by external mechanical stress to be rearranged in an activated state, and an original disordered isotropic topological state is converted into a highly oriented ordered state, so that on the premise of not changing the chemical components of the material, the potential barrier of crystallization nucleation is remarkably reduced, the endogenous enhancement of intrinsic latent heat of the material is realized, and the potential safety hazard of the material is reduced. And stable high-energy storage density can still be kept in long-time thermal circulation. According to the method, the application potential of the polyurethane solid-solid phase change material in high-power heat dissipation scenes such as power battery heat management is expanded.

This invention relates to the field of biomedical materials technology. It discloses a metal-organic hydrogel-mediated soluble microneedle patch, its preparation method, and its applications. The microneedle patch comprises a matrix and needles, wherein the matrix and needles contain a metal-organic hydrogel, polydimethylsiloxane, and a poorly soluble target drug. This application innovatively applies a metal-organic hydrogel to the preparation of a soluble microneedle patch, constructing an amphiphilic matrix with polydimethylsiloxane. This enables the preparation of soluble microneedle formulations containing uniformly distributed poorly soluble drugs, expanding the application scenarios for poorly soluble drugs and improving resource utilization. It has significant value in the formulation preparation of poorly soluble drugs.

This invention provides a method for separating and extracting lead-212 and bismuth-212 from monazite-processed radium slag dissolution solution, belonging to the field of medical radioisotope preparation technology. The method uses monazite-processed radium slag dissolution solution containing radium-228 decay chain substances as raw material. First, halide ions are added to the raw material and the acidity is adjusted to obtain an acidic radium slag dissolution solution. Then, the solution is pretreated with an anion exchange resin column to remove impurities. After static decay, a decay solution containing lead-212 and bismuth-212 is generated. Utilizing the halogen content and acidic environment of the solution itself, the solution is selectively adsorbed again by an anion exchange resin column. Subsequently, elution is performed using a desorption reagent, and the medium conditions are readjusted for repeated adsorption and desorption, ultimately yielding a high-purity and high-specific-activity lead-212 and bismuth-212 finished desorption solution. This invention can efficiently extract lead-212 and bismuth-212 with fast extraction speed, high recovery rate and purity, and is less likely to cause organic pollution in the product.

The invention provides an icotinib hydrochloride crystal form shown in a formula (I) and a preparation method thereof, the icotinib hydrochloride crystal form V provided by the invention is a novel crystal form structure, the XRPD characteristic peak combination of the icotinib hydrochloride crystal form V is different from that of all existing crystal forms, and the icotinib hydrochloride crystal form V has high crystallinity and excellent thermodynamic stability; in addition, an oral solid preparation (such as a tablet) prepared from the crystal form still keeps excellent dissolution stability under an accelerated condition, and the change rate of the dissolution behavior after an accelerated test is obviously lower than that of a crystal form in the prior art, so that a key material basis is provided for producing a solid medicinal preparation with high batch-to-batch consistency and reliable clinical curative effect; and the method has important industrial application value.

This application relates to the field of cathode active material technology, and discloses a lithium iron manganese phosphate cathode active material, its preparation method, and its applications, overcoming the problem of poor long-cycle performance of lithium iron manganese phosphate batteries in the prior art. The lithium iron manganese phosphate cathode active material of this application includes lithium iron manganese phosphate and a carbon coating layer, wherein the general formula of the lithium iron manganese phosphate is LiFe. x Mn y M z PO4, where 0 < x < 1, 0 < y < 1, 0.001 ≤ z ≤ 0.1, and M includes at least five of Mg, Ca, V, Co, Ni, Cu, Zn, Al, Zr, Ce, Ti, Cr, Y, Nb, Zr, Mo, Ru, Cd, La, Sr, and W; the crystallinity of the lithium iron manganese phosphate cathode active material is ≥ 90%. The lithium iron manganese phosphate of this application exhibits both high rate performance and long cycle stability.

The invention belongs to the technical field of medical imaging, and discloses a gadolinium-based contrast agent with maltotriose covalently linked with a chelating group as well as a preparation method and application of the gadolinium-based contrast agent. The preparation method comprises the following steps: modifying a cyclic polydentate ligand, carrying out nucleophilic substitution, connecting a flexible long chain, carrying out reductive amination connection on primary amine on a linker terminal group and an aldehyde group of maltotriose to form a whole, adding trifluoroacetic acid to remove a protective group on the polydentate ligand, and carrying out a reaction to obtain the polydentate ligand. And finally adding Gd < 3 + > for chelating to obtain a final product. According to the invention, the maltotriose is covalently linked with the annular polydentate ligand, so that the guiding capability of the gadolinium-based contrast agent is stronger, and the distinguishing degree in the diagnosis of bacterial infection is higher.

The application provides a sample bank full-process scheduling method based on a genetic algorithm and biological stability modeling, and relates to the technical field of biological sample bank management. In view of the problems of the long cold ischemic time of samples from ex vivo to cryopreservation, the waste caused by uneven sample resource allocation, and the new compliance requirements such as temperature fluctuation of the biological sample bank and ethical withdrawal which are difficult to be embedded into the scheduling process, the human resources, processing equipment and storage space in the biological sample bank are coded as binary chromosomes, a multi-objective fitness function is constructed, and the genetic algorithm is used for dynamic optimization in the full process. Through the multi-objective optimization scheduling driven by the genetic algorithm, the sample activity preservation rate, the equipment utilization rate and the thermodynamic stability are improved, and the defects of the original scheduling method are solved. Through the closed-loop architecture of the physical layer, the perception layer, the decision layer and the execution layer, the collaborative optimization of the sample activity, the resource efficiency and the ethical compliance is realized, and the sample failure risk is reduced.

The application relates to the technical field of sodium ion battery materials, and discloses a novel silicate sulfate sodium ion battery positive electrode material and a preparation method thereof. The application aims to provide the novel silicate sulfate sodium ion battery positive electrode material and the preparation method thereof, solves the preparation problem that high-temperature decomposition of a sulfate polyanion material cannot in-situ coat biocarbon, and verifies the electrochemical activity. The Na2FeSiO4SO4 / C-700 electrode material has a first discharge capacity of 57.79 mAh / g at 0.05 C, and has potential application value in sodium ion batteries.

This invention belongs to the field of lithium-ion battery material technology, specifically relating to a high-nickel single-crystal ternary cathode modified material and its preparation method. The method includes: ball milling a high-nickel single-crystal ternary precursor, lithium hydroxide monohydrate, and a cerium-tantalum co-doped lithium molybdenum oxyfluoride compound, followed by pre-sintering and high-temperature calcination under an oxygen atmosphere to obtain single-crystal powder particles; then mixing the single-crystal powder particles with a calcium-doped lithium boron phosphorus oxynitride compound, drying, and holding under a nitrogen atmosphere before sieving. The cerium-tantalum co-doped lithium molybdenum oxyfluoride compound is prepared by ball milling, drying, and segmented sintering of lithium carbonate, cerium oxide, tantalum oxide, molybdenum oxide, and lithium fluoride in a protective powder; the calcium-doped lithium boron phosphorus oxynitride compound is prepared by ball milling, segmented sintering, and ball milling and sintering with lithium nitride under nitrogen protection. This invention significantly improves the structural stability and electrochemical performance of the high-nickel single-crystal ternary cathode material.

The application belongs to the technical field of magnetic functional materials, and discloses a dense gadolinium-based fluorocarbonate magnetic refrigeration material and a preparation method and application thereof. The chemical formula of the gadolinium-based fluorocarbonate magnetic refrigeration material is NaGdCO3F2. The material is constructed by anti-magnetic sodium ions and fluorine ions and carbonic acid root mixed bridging ligands to form a dense gadolinium-based three-dimensional honeycomb framework structure. The specific spatial arrangement effectively suppresses the magnetic exchange interaction while maintaining high magnetic density, induces short-range magnetic correlation near 0.5K, suppresses the magnetic order temperature to 0.22K, and widens the effective refrigeration temperature range by generating a Schottky abnormal specific heat wide peak. Under 1T, 2T and 7T magnetic fields, the maximum magnetic entropy change reaches 23.1, 38.9 and 59.1 J·kg ‑1 ·K ‑1 respectively. As an excellent low-temperature magnetic refrigerant, the material has the advantages of good thermal stability, simple preparation process and low cost, and has a wide industrial application prospect in the field of adiabatic demagnetization refrigeration materials.