1228results about How to "Wide range of choices" patented technology

The invention relates to a preparation method of a metal organic framework based composite phase-change material. The method comprises the steps that a metal organic framework material substrate is prepared selectively; hole diameter size design and hole channel polarity regulation and control are performed on the substrate according to the size and the kind of a core material, so that a phase-change core material to be loaded is matched better; the soluble phase-change core material is prepared into a solution; a metal organic framework material is dispersed in the prepared phase-change material solution; a phase-change material is adsorbed by utilizing an extra-large specific surface area and a nano hole channel structure of the metal organic framework material; drying is performed; and then the metal organic framework composite phase-change material with a shaping effect is obtained. According to the method, a novel metal organic framework based composite phase-change material is developed; the prepared metal organic framework based composite phase-change material can effectively avoid leakage and the like, and has the advantages of adjustable nano hole structure and wide core material selection range; the method is simple in technology and mild in reaction condition, and is suitable for scale production; and a raw material is cheap and easy to obtain.

The invention discloses a mobile terminal housing and a processing method of the mobile terminal housing. The mobile terminal housing is a metal housing, and is provided with interval seams for dividing the mobile terminal housing into antenna areas and a remaining area; each interval seam is internally filled with an insulating layer; a printing layer is arranged on the outer surface of each insulating layer. The mobile terminal housing disclosed by the invention has the advantages that the printing layer is arranged on the outer surface of each insulating layer, and the printing layer can be formed into various types, so that the design of the mobile terminal housing is rich and colorful, and the diversification requirements of users are met; because of the decoration effect of the printing layer, the influence of the texture and color of the insulating layer to the appearance of the mobile terminal housing is reduced, therefore the material selection range of the insulating layer is wider, and a better-performace and cheaper material is beneficially selected.

The invention belongs to the field of preparation of macromolecular composite materials and particularly relates to an all-weather persistent antistatic master batch capable of being subjected to thermoplastic processing and an antistatic composite material. The antistatic master batch is prepared by forming of a low-dissociation-energy compounding agent, a processing auxiliary agent and thermoplastic macromolecular resin containing polar groups through macromolecular thermoplastic processing equipment at the temperature of 25-300 DEG C; and the mass ratio of the compounding agent to the thermoplastic macromolecular resin is equal to (1:10)-(1:50). The invention also discloses the antistatic composite material which is obtained after the persistent antistatic master batch and a macromolecular base material are formed through the thermoplastic processing equipment. The antistatic composite material has the characteristics that: 1. the antistatic composite material has light color and dyeability; 2. The master batch of the antistatic composite material and the compounding agent are wider in selection range, low in cost and easy to obtain, and the production process is simple, safe and non-hazardous; and 3. the influence of the ambient environment on the antistatic performance of the antistatic composite material is less, and the antistatic performance is persistent.

The invention relates to a nitrogen-phosphorus double-doped carbon-coated transition metal diphosphide hydrogen evolution catalyst and a preparation method thereof. The nitrogen-phosphorus double-doped carbon-coated transition metal diphosphide is characterized in that the structural formula is MP2@NPC, a transition metal diphosphide MP2 is used as a core, nitrogen-phosphorus double-doped carbon NPC is used as a shell so that a core-shell structure is formed, the diphosphide has a nano-particle structure, the particle size is less than 50nm and good crystallinity is obtained. The composite catalyst has the electrocatalytic hydrogen evolution activity similar to that of the commercial platinum carbon and catalyst stability better than that of the commercial catalyst. The catalyst has a wide application prospect.

A fuel which is used for rotary kiln cement clinker firing is composed of raw materials with the following weight percentage: coal 3-80, straw substances 0-90, forest products wastes 0-95 and food industry by-product residues 0-70. The straw substances refer to rice straws, wheat straws, cotton stalks, sesame stalks, soybean straws, corn stalks, sorghum stalks, rice husks, peanut shells, soybean shells and corn sticks, the forest products wastes refer to defective bamboo, wood, tree branches, leaves, shrubs, faggot straws and sawdust and wood wool corner scrap materials in the bamboo and wood-processing industry, the food industry by-product residues refer to bran, wheat skin, squeezing meal cake, bean dregs and wine lees, and the coal refers to bituminite, anthracite and coke coal powder. The flue raw materials which are used for the rotary kiln cement clinker firing have wide selecting range, simple preparation, convenient use and rapid burning speed and are beneficial for protecting atmosphere circumstances.

The invention relates to a preparation technique of a wood plastic composite material, in particular to a method for preparing a wood plastic composite material by using modified wood powder and waste plastics. The method is characterized in that: (1) discarded agriculture and forestry wastes are crushed, milled and dried, and three different surface modification agents are added in sequence and mixed with the waste power one after another in a high-speed mixer to produce the modified water powder; and (2) waste plastics are washed and crushed into granules with the grain size of 2mm to 12mm and then dried; the modified waste powder, the waste plastic granules, a lubricant, a vesicant and a blowing promoter are mixed by weight percentage and put into the high-speed mixer for high-speed mixing and then cooled to the temperature lower than 55 DEG C for discharging so as to prepare a special premix. The composite material has super high strength and anti-bending and anti-impact capacity, wherein, the obvious enhancement of the anti-impact strength causes the great enhancement of the processing capacity of the product, thus causing products to meet different demands and ensuring an extremely wide application range.

The invention relates to an application of a porous carbon material with a grading pore structure in a lithium-air cell anode, and is characterized in that the carbon material has mutually communicated grading pore structure distribution which has a mesoporous structure for depositing the discharge products and a macroporous structure suitable for transmission of oxygen and an electrolyte. When the carbon material is taken as a material of the lithium-air cell anode, the space utilization rate of carbon material can be increased at maximum limitation during a charge and discharge process, specific discharge capacity, voltage platform and multiplying power discharge capability of the cell can be effectively increased, so that the energy density and power density of the lithium-air cell can be increased. The porous carbon material has the advantages that the preparation technology is simple, the material source is wide, the grading pore carbon material pore structure enables regulation and control, the regulation and control modes are various, and the doping of metal/metal oxide can be easily and simultaneously realized.

The invention provides a method for preparing composite microspheres with the particle diameter of 0.01-100Mum and adjustable particle size distribution. The method is characterized in that one or more kinds of superfine particles is added to two or more kinds of polymer (or performed polymer) with fluxible processability to form composite microspheres by reaction mixing and oriented dispersion technique of superfine particles. The composite micropheres have the advantages of even dispersion of superfine particles and large embedding amount. The preparation method has the advantages of continuous preparation and low cost, and has wide application prospect in fields such as biological medical treatment, electronic message, daily life, etc.

The invention relates to a method for preparing a graphene film in a low-temperature condition. The method at least comprises the following steps: (1), performing smooth treatment on a metal substrate; (2), performing doping of a chemical reagent on the surface of the metal substrate obtained in the step (1); (3), under a protective atmosphere, performing annealing treatment on the metal substrate obtained in the step (1); (4), contacting the metal substrate with a carbon source, and performing chemical vapor deposition in the low-temperature condition to obtain the graphene film; and optionally, after the step (4), performing step (5), stopping heating, cooling to the room temperature, and taking out the metal substrate with the graphene film thereon, wherein the chemical reagent is a precursor salt of metal. The method for growing the graphene film is low in growth temperature, low in cost, high in industrialized feasibility and wide in select range of the substrate, and can prepare the complete single-layer or multi-layer graphene film with high quality.

The invention provides a preparation method for a multilayer dissimilar metal composite ultra-thin strip. The preparation method includes the process steps that (1) different metal materials are synchronously cold-rolled for first thinning; (2) metal thin strips are polished and cleaned; (3) the upper surfaces and lower surfaces of two or more metal thin strips are closely attached; (4) two-roll synchronous cold rolling is conducted on dissimilar metal combined strips; (5) the upper surfaces and lower surfaces of 2-10 dissimilar metal thin strips subjected to preliminary combination are closely attached and then the procedures of the step (1) to the step (4) are repeated 2-10 times; (6) reversible four-roll synchronous cold rolling is conducted on a multilayer dissimilar metal composite thin strip; and (7) reversible four-roll asynchronous cold rolling is conducted on the multilayer dissimilar metal composite thin strip, and the multilayer dissimilar metal composite ultra-thin strip with the thickness being 0.01 mm-0.02 mm is obtained. According to the method, the selection range of the metal materials is wide, the requirement for equipment capacity is low, and the surface quality of the ultra-thin strip can be improved remarkably; besides, production resources are saved, production cost is reduced, and the method is suitable for large-scale industrial production.

The invention discloses a method for preparing air-laying cellucotton and cellucotton produced by the method. Taking low melting point fibers and other fibers as raw material, the cellucotton is produced by rough shape cutting, coarse opening, fine opening, air laying, hot binding and parting cut packaging, wherein the air laying is as follows: the loose fibers which are distributed evenly in a cotton box after fully mixed by the fine opening are further mixed by airflow and delivered by pressurized airflow to between the net forming curtain and the net forming roller to be formed into a required retiform structure. The preparing process has wide range of material selection, is suitable for not only all the raw materials adopted in the prior process, but also the plant fiber widely existing in the natural world which are not used in the prior art such as couch grass, reed, cornstock, straw and bagasse as raw materials, and the waste materials such as wood wool, crushed sponge and wool manufacturing crushed aggregates to reuse and regenerate; in addition, the preparing process has high production efficiency and low energy consumption, and produces the cellucotton with great improvement in the performance, thereby being applied to wider fields.

The invention relates to a method for preparing hydrogen through photoanode-photovoltaic battery coupled dual-illumination fully-photic-driven decomposition of water. Efficient decomposition of water is realized under sunlight illumination conditions by using coupling of a photoelectrocatalysis technology with a photovoltaic battery technology, adopting a water oxidation cocatalsyt modified semiconductor material as a photoanode, placing a proton reduction cocatalyst modified Si battery in an electrolyte as a photocathode, directly connecting the positive electrode of the Si battery with the anode through a lead and allowing the surface of the cathode to contact with the electrolyte. The method realizes fully photic driven decomposition of water without applied bias conditions, and the solar energy utilization efficiency STH of the method reaches 2.2% or above.

The invention belongs to the technical field of building decoration and transportation, and discloses a light-weight and high-strength plastic steel sandwich board and its making method. The plastic steel sandwich board comprises two panels and a sandwich layer fixed between the two panels. The making method of the plastic steel sandwich board comprises the following steps: placing the sandwich layer between the two panels, and respectively bonding the two panels with the right and wrong surfaces of the sandwich layer through an adhesive to prepare the plastic steel sandwich board, wherein each of the panel is obtained through compounding one side of a continuous fiber reinforced thermoplastic plastic board with a non-woven fabric through hot-press molding. The plastic steel sandwich board has the advantages of light weight, high strength, heat insulation, fire resistance, moisture resistance, corrosion resistance and the like.

A hydraulic control system and a hydraulic control method are disclosed. The hydraulic control system comprises a first closed pump (P1) and a first engine (M1) connected with each other, a second closed pump (P2) and a second engine (M2) connected with each other, and a hydraulic motor (P3). The first closed pump (P1), the second closed pump (P2) and the hydraulic motor (P3) are connected in parallel. Compared with the prior art, the present hydraulic control system has advantages of wider engine model selection range, higher reliability and better micro-motion performance.

The invention discloses a reinforced tubular porous composite film, as well as a preparation method and an application thereof. The composite film consists of a tubular porous body, a first polymer material film and a second polymer material film. The composite film is obtained by coating the first polymer material film and the second polymer material film on the tubular porous body. The reinforced tubular porous composite film has the advantages of no surface defect, high water permeability, high tensile strength, wide selection range of the tubular porous body and easy production.

The invention discloses a multi-element perovskite material, as well as preparation and application thereof. The multi-element perovskite material is multi-element fully-inorganic metal non-lead halide salt and has a perovskite structure; the chemical formula of the multi-element perovskite meets: (the formula is shown in the description), wherein x is greater than or equal to 0 and less than or equal to 1, y is greater than or equal to 0 and less than or equal to 1, A is Cs<+>, B1, B2, B3 and B4 are Na<+>, Ag<+>, In<3+> and Bi<3+> respectively, and X is a halogen element. Through improvement on the varieties and proportion of the key chemical elements of the perovskite material, being compared with the prior art, the multi-element perovskite material can effectively solve the problems that the conventional multi-element perovskite material has few varieties, and is difficult to regulate and control, and high in environmental pollution.

There are provided a heat-generating composition excellent in moldability, shape retaining property and heat-generating characteristics, and a heat-generating body using the same that can maintain the shape of a molded article of the heat-generating composition irrespective to the pressure inside the container bag and has excellent heat-generating characteristics and long-term heat generation maintaining property. It is a non-viscous heat-generating composition having excessive water characterized in that the heat generating composition generating heat in contact with air comprises, as essential components, a water absorbing polymer, a carbon component, a heat-generating promoter, water and a heat-generating substance, has excessive water, and has an incremental degree of viscosity of less than 1,000 cP and a liquid permeation degree of 5 or more.

The invention relates to organic/inorganic composite microspheres with core-shell structures and a preparation method and application thereof. The preparation method of the organic/inorganic composite microspheres comprises the steps of firstly, carrying out surface activation treatment on inorganic particles by using an organic coupling agent, so as to prepare lipophilic active inorganic particles with molecular bridges; adding the active inorganic particles into a homogeneous good solution where an organic polymer is dissolved, and thoroughly stirring and mixing, so as to form a monodisperse emulsion; slowly adding a non-solvent into the emulsion, so as to enable the organic polymer in the solution to be uniformly attached to the surfaces of the inorganic particles through the molecular bridges, repeatedly washing with the non-solvent, and drying, thereby preparing free-flowing organic/inorganic composite microspheres with the core-shell structures. Compared with the prior art, the preparation method disclosed by the invention has the characteristics of rapidness, simplicity, convenience, flexibility, controllability and the like, and can be applied to the preparation of any composite microsphere with an inorganic core-organic shell structure.