15results about How to "Adjustable performance" patented technology

The embodiment of the invention discloses a ZrO2 doped CMA material preparation method and a structure and function integrated regulation and control method thereof. The method comprises the following steps: S1, mixing an aluminum oxide source, a calcium oxide source and a magnesium oxide source according to a set proportion to obtain a mixed source material, and adding an additive zirconium dioxide into the mixed raw material to obtain a raw material mixture; wherein the particle sizes of the alumina source, the calcium oxide source and the magnesium oxide source are equivalent, and the mass ratio of the zirconium dioxide to the mixed source material is not greater than 4wt%; s2, stirring and mixing the raw material mixture, and adding a water binder to obtain a uniformly mixed material; wherein the mass ratio of the water to the raw material mixture is 5-50%; s3, carrying out compression molding on the uniformly mixed material under the pressure of 80-120 MPa to obtain a green body; and S4, firing the green body in an air atmosphere at 1650-1750 DEG C to obtain the ZrO2 doped CMA material. The content of the C2M2A14 phase in the CMA material can be regulated and controlled between 80% and 100% by regulating and controlling the doping amount of ZrO2, the firing temperature and the heat preservation time.

The invention discloses a preparation method of desert sand ceramic aggregate and application of the desert sand ceramic aggregate. The preparation method comprises the following steps: firstly, adding water into a desert sand raw material, and ball-milling to obtain slurry; then the slurry is subjected to forming, sintering treatment and acid pickling treatment in sequence, and ceramic aggregate is obtained after the acid pickling treatment is finished; according to the application of the desert sand ceramic aggregate, the ceramic aggregate prepared by the preparation method of the desert sand ceramic aggregate is used as concrete aggregate, asphalt aggregate or high-molecular polymer mortar aggregate; the ceramic aggregate prepared by the preparation method of the desert sand ceramic aggregate is used as a channel fracturing propping agent in the exploitation industry of petroleum, natural gas, coal bed gas or shale gas, or is used as a heat insulation material in the building industry. By using the method provided by the invention, the desert sand-containing ceramic aggregate with different purposes can be produced.

The invention discloses low-fat gel type Pickering two-phase emulsion foam, a preparation method thereof and application of the low-fat gel type Pickering two-phase emulsion foam in dual-nutrient loading and 3D printing, and belongs to the technical field of grease and emulsified fat products. The prepared gel type Pickering two-phase emulsion foam does not contain any synthetic surfactant and trans fatty acid, multi-cavity emulsion droplet and bubble structures coexist, and multi-interface Pickering stabilization endows the system with excellent stability and good plasticity and thermal reversibility. Besides, the foam system can realize high-efficiency co-loading of nutrients, the nutrient co-loading system shows good application potential in 3D printing, high printing precision and high nutrient retention efficiency can be realized, and the performance of a 3D printing object can be adjusted by adjusting the type and content of used fat, so that the 3D printing effect is improved. The development and multifunctional application of healthy and nutritional aerated steady-state fat-based food (non-dairy cream, single cream, ice cream and the like) are greatly widened.

The invention belongs to the technical field of algal polysaccharide extraction, and discloses a modification extraction method of algal asparagus polysaccharide and a method for preparing a lutein coating by using the algal asparagus polysaccharide. The modified extraction method comprises the following steps: extracting gracilaria lemaneiformis powder with a weak base solution, enabling lactide and polysaccharide to be subjected to grafting reaction through a redox initiation system under the assistance of ultrasonic waves, and then separating out a first polysaccharide component with high emulsibility and a second polysaccharide component with high gel property through graded alcohol precipitation. The two obtained functional components are used for coating xanthophyll, specifically, the first polysaccharide component emulsifies a xanthophyll oil phase to form a pre-emulsion, the second polysaccharide component is compounded with gelatin, a composite coacervate is formed on an oil drop interface by adjusting the pH value, and finally drying and curing are conducted. According to the method, two modified polysaccharides with definite functions can be synchronously obtained, the prepared xanthophyll coating is high in encapsulation efficiency, good in storage and processing stability and excellent in water dispersibility, and the problems that xanthophyll is unstable and difficult to apply are effectively solved.

The invention relates to a double half-Heusler alloy thermoelectric material with low lattice thermal conductivity and a preparation method thereof, the thermoelectric material is any one of a p-type thermoelectric material or an n-type thermoelectric material, the chemical formula of the p-type thermoelectric material is Sc0. 6V0. 5Co1-xNixSb, x is more than or equal to 0 and less than or equal to 0.12, and the n-type thermoelectric material is one of Sc0. 6V0. 5Co1-xNixSb. The chemical formula of the n-type thermoelectric material is Sc0. 5V0. 6Co1-yNiySb, wherein y is greater than or equal to 0 and less than or equal to 0.30. The preparation method comprises the following steps: mixing Sc, V, Co, Ni and Sb, grinding, sequentially carrying out sintering and vacuum packaging treatment to obtain a thermoelectric material wafer, and carrying out high-temperature annealing treatment on the thermoelectric material wafer to obtain the double half-Heusler alloy thermoelectric material with low lattice thermal conductivity. Compared with the prior art, the method has the advantages that the prepared double half-Heusler alloy thermoelectric material is replaced by the heterovalent elements, the Sc / V ratio is accurately regulated and controlled, p-type and n-type thermoelectric materials based on the same parent compound are successfully obtained, and the two materials both show promising thermoelectric performance.

The invention discloses a cerium-based photosensitizer, a preparation method and application of the cerium-based photosensitizer in photocatalytic reaction, and relates to the technical field of coordination chemistry and photocatalysis. The general formula of the cerium-based photosensitizer is Ce (L1) 3 (L2) m, and L1 comprises a strong field anion ligand of at least one strong electron withdrawing group or a strong field anion ligand of a rigid structure; l2 is a neutral nitrogen-containing heterocyclic ligand, and m is 0 or 1. According to the invention, strong visible light absorption and long excited state life can be achieved by introducing L1, and the Ce < + > / Ce < 4 + > oxidation potential can be reduced to a mild range, so that the Ce < 4 + > intermediate can be efficiently reduced by a mild reducing agent generated in the reaction, and simple catalytic circulation without an external reinforced reducing agent is realized. When being applied to boronation reaction of various alkenyl / aryl / heteroaryl halides and various organic boron reagents, the photosensitizer shows high catalytic activity (the yield is as high as 91%), the performance is superior to that of a noble metal photosensitizer, but the cost is remarkably reduced, and the photosensitizer is environment-friendly.

The invention discloses an Mxene / CNT / metal oxide aerogel packaging and reinforcing material and a preparation method and application thereof, and belongs to the technical field of anti-radiation packaging and reinforcing materials for electronic devices and preparation of the anti-radiation packaging and reinforcing materials. The problem that the shielding performance of an existing anti-radiation packaging reinforcing material for the electronic device is limited is solved. According to the invention, MXene is adopted as a matrix, carbon nanotubes are adopted as a structural reinforcement to serve as a matrix material for constructing aerogel, a porous structure and a large surface area of the matrix material are modified with a radiation shielding functional material, PVA is adopted as a cross-linking agent to improve the mechanical property of aerogel, and finally, a freeze-drying technology is adopted to prepare the radiation shielding aerogel. The MXene / CNT / metal oxide aerogel packaging material with multiple functions and adjustable performance is prepared. Compared with a polymer-based composite material, the aerogel framework can improve the loading capacity of functional particles to the maximum extent, performance improvement is achieved, and then design and development of the light efficient anti-radiation packaging and reinforcing material are achieved.

The application discloses a siloxane grafted hyperbranched polyethylene and application thereof in preparation of a low-leakage paraffin-based heat-conducting phase change material. The application provides a siloxane grafted hyperbranched polyethylene, which is obtained by copolymerization of ethylene and vinyltriethoxysilane according to a 'chain walking' polymerization mechanism and catalyzed by a Pd-diimine catalyst. The application provides application of the siloxane grafted hyperbranched polyethylene in preparation of a low-leakage paraffin-based heat-conducting phase change material. The application synthesizes the siloxane grafted hyperbranched polyethylene with crosslinking characteristics, uses the same to be compounded with paraffin, and forms a three-dimensional network structure through subsequent crosslinking, thereby effectively restricting macroscopic flow of paraffin above a phase change temperature, and significantly improving shape stability and anti-leakage performance of the composite material. Meanwhile, flake graphite is introduced to construct an efficient heat-conducting path, and the overall heat-conducting coefficient of the material is improved.

The invention provides a phenyl phosphonic acid bis (o-isocyano-phenol) ester ligand which is prepared by the following steps: in an inert gas atmosphere, mixing a compound benzoxazole with anhydrous tetrahydrofuran, cooling to-95 to-65 DEG C, adding an n-butyllithium solution dissolved in an organic solvent, stirring at-95 to-65 DEG C for 0.5-4 hours, adding diphenylphosphoryl chloride, stirring at room temperature for 8-10 hours, filtering, washing, and drying to obtain the phenyl phosphonic acid bis (o-isocyano-phenol) ester ligand. Carrying out post-treatment on the obtained reaction liquid to obtain a phenyl phosphonic acid bis (o-isocyano phenol) ester ligand; compared with the most common organic dye photosensitizer, the copper-based photosensitizer prepared from the phenyl phosphonic acid bis (o-isocyano-phenol) ester ligand overcomes the defect that the catalytic activity of the organic dye photosensitizer is rapidly reduced under long-term illumination, and in addition, the organic dye photosensitizer is easy to generate an aggregation-induced quenching effect; the photosensitizer disclosed by the invention does not generate an aggregation-induced quenching effect; compared with an iridium complex photosensitizer which is commonly used at present, the cuprous photosensitizer provided by the invention is more environment-friendly.

The invention belongs to the technical field of phase change materials. The preparation method of the graphene reinforced low-melting-point metal phase change composite material comprises the following steps that (1) honeycomb-shaped graphene aerogel is prepared; (2) cutting the graphene aerogel into a required shape, putting the graphene aerogel into a customized graphite pattern mold, putting the filled pattern mold into a graphite sleeve, and putting a low-melting-point metal block on the upper part of the pattern mold to prepare a complete mold; 3) placing the mold prepared in the step 2) in an induction heating area of an air pressure infiltration furnace, vacuumizing the furnace body, heating the mold under a vacuum condition, and preserving heat; (4) injecting high-purity argon to pressurize and inflate the furnace; and (5) heating is stopped, the mold is taken out after furnace cooling is conducted to the room temperature, demolding is conducted, and the graphene reinforced low-melting-point metal phase change composite material is obtained. According to the method, high reliability, high heat conductivity and high energy storage density of the low-melting-point metal phase change material are achieved, and the method has wide application prospects in the fields of heat management and energy storage.

This invention belongs to the field of polymer functional materials technology, specifically relating to a biodegradable light-converting film with intrinsic fluorescence and its applications. The biodegradable light-converting film is prepared from a biodegradable copolyester with aggregation-induced emission properties. The biodegradable copolyester is polymerized from a polymerizable monomer, a first monomer providing rigid conjugated units, and a second monomer providing flexible spacer units. In the main chain structure of the biodegradable copolyester, the longest linear spacer segment between any two adjacent rigid conjugated units derived from the first monomer has ≥10 carbon atoms. Through precise molecular structure design, the aggregation-induced emission properties are chemically bonded to the biodegradable polyester main chain, fundamentally solving the problems of easy migration, aggregation quenching, and high cost of the light-converting agent in traditional additive-type light-converting films. This light-converting film exhibits efficient and stable intrinsic fluorescence in the solid state, with tunable fluorescence color, and possesses good mechanical properties and biodegradability.

[Abstract] To simultaneously achieve a function of reducing an amount of cool air flowing from a cool air main flow passage into an air mix chamber when an air mix door is in the vicinity of a full hot position and a function of actively guiding the cool air from the cool air main flow passage to a rear outlet via the air mix chamber. [Solution] When a cool air amount adjustment guide 20 formed to extend from an air conditioning case 2 into a cool air main flow passage 9 and configured to limit an amount of cool air flowing into an air mix chamber 11 when an air mix door 10 is in the vicinity of a full hot position, and a cool air bypass guide 30 configured to guide the cool air passing through the cool air main flow passage 9 to a rear outlet 16 while reducing mixing of the cool air with warm air passing through a warm air main flow passage 8 are provided, a part of the cool air amount adjustment guide 20 is cut out, and a cool air introduction port 31 of the cool air bypass guide 30 faces the notch 21.

The invention discloses a curing agent with adjustable reaction activity, a high-modulus epoxy resin matrix and a preparation method of the high-modulus epoxy resin matrix. The adjustable curing activity epoxy resin matrix disclosed by the invention has the characteristics of high strength and high modulus, and is a combination of polyfunctionality epoxy resin and a novel activity adjustable aromatic amine curing agent; the novel activity-adjustable aromatic amine curing agent is a compound obtained after amino and an electron-withdrawing group or an electron-donating group replace aromatic ring structures such as a benzene ring, biphenyl, diphenyl and a fused ring, and on the basis that the high modulus and other mechanical properties of the epoxy resin can be guaranteed, the curing activity of the resin can be regulated and controlled within a large range; therefore, the actual requirements of different composite material forming processes are met.

This invention discloses a small, equal-band dual-frequency transceiver based on wireless communication technology. It includes a ceramic dielectric body, a tuning element, a multilayer circuit body, and an external electrode assembly. The tuning element is disposed on top of the ceramic dielectric body. The multilayer circuit body is disposed inside the ceramic dielectric body and electrically connected to the tuning element through a via structure. The multilayer circuit body includes a low-frequency channel filter and a high-frequency channel filter. The external electrode assembly is disposed at the bottom of the ceramic dielectric body. The low-frequency channel filter outputs signals within a set low-frequency band, and the high-frequency channel filter outputs signals within a set high-frequency band. This invention achieves a large capacitance value within a small volume by using vertical coupling. By setting the tuning element, the stopband bandwidth and suppression depth of the dual-frequency transceiver can be flexibly adjusted by changing the value of the tuning element, resulting in miniaturization, wide stopband, high suppression, and tunability.

This utility model discloses an adjustable optocoupler structure with fast response characteristics, relating to the field of optocoupler structure technology, including a base plate, a fixing structure, and a heat dissipation structure. The lower protective box is firmly fixed to the top of the base plate and closely cooperates with the upper protective cover to form a sealed protective space, providing protection for the internal adjustable optocoupler structure. When the buckle is engaged and a slight force is applied, pressing causes the protruding button to retract, disengaging from the fixing groove. Simultaneously, the first and second locking blocks slide out of the first and second locking slots, respectively. The entire process is smooth and natural, allowing the upper protective cover to be quickly lifted, fully exposing the adjustable optocoupler structure inside the lower protective box. This facilitates detailed inspection, efficient maintenance, and precise debugging by operators. Opening the cabinet door separately allows operators to perform targeted inspections and maintenance of the optocoupler structure, significantly improving work efficiency and reducing unnecessary disassembly operations.