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253results about How to "low cost of preparation" patented technology

Preparation of microballoons based on microfluid

InactiveCN101279232Alow cost of preparationEasy integration and miniaturization
A microfluid-based microballoon preparation method adopts a microfluid channel system to lead a colloidal solution or a pre-polymer solution to form liquid drips in a mobile phase. The formation of the liquid drip-based template is used for bioanalysis and polymeric micro spheres of protein, gene and drug screening carrier. The preparation method includes the following steps: preparation of the microfluid channel: establishing a microfluid channel network by adopting the micro-machining technology or connecting a T-shaped channel with a pinhead, a polymer pipe and a tee joint (the channel is provided with two inlets, namely, a dispersed phase inlet and a continuous phase inlet and an outlet); preparation of the liquid drip template: encasing the two phase solutions of a dispersed phase solution and a continuous phase solution respectively into a pin case, connecting with the respective inlet, digital controlling an ejector jet pump to control the velocity of flow of the two phase solutions and acquiring even and stable liquid drip template from the outlet; preparation of the microballoon: drying and solidifying the liquid drip template and removing the impurities on the surface or inside to acquire a polymer microballoon according with the requirement of bioanalysis and protein, gene and drug screening carrier.
Owner:NANJING DONGJIAN BIOLOGICAL TECH

Method for preparing lithium silicate serving as high-temperature CO2 absorbing material

The invention discloses a method for preparing lithium silicate material absorbing high-temperature CO2 by taking artificial zeolite as raw material, and provides a process for preparing lithium silicate material serving as high-temperature CO2 absorbent by use of artificial zeolite. Lithium silicate precursors are prepared from LiNO3 and artificial zeolite in different proportions by ion exchange and sol-gel methods, and the lithium silicate material is synthesized by roasting the lithium silicate precursors at a temperature between 600 and 900 DEG C for 2 to 8 hours. The lithium silicate material prepared absorbs CO2 in a thermogravimetric analyzer at a temperature between 400 and 700 DEG C in CO2 and N2 atmosphere in different proportions. Aiming at the problem of a great amount of high-temperature CO2 emitted from power plants and flue gas, the method recycles carbon resources and reduces CO2 emission. The method synthesizes the lithium silicate material by taking cheap artificial zeolite and LiNO3 as raw material and adopting the ion exchange and sol-gel methods. Compared with the prior art, the method has the advantages of cheap and readily available artificial zeolite used as the raw material, reduction in preparation cost of the lithium silicate material and easiness of realizing industrial production.
Owner:KUNMING UNIV OF SCI & TECH

Intelligent induction type automatic card taking and swiping device

The invention discloses an intelligent induction type automatic card taking and swiping device. The intelligent induction type automatic card taking and swiping device comprises an automatic card taking and swiping device body, a telescopic rod structure, a card taking and swiping panel and a bodywork induction control device, wherein the telescopic rod structure, the card taking and swiping panel and the bodywork induction control device are installed on the automatic card taking and swiping device body. The bodywork induction control device comprises an ultrasonic sensor, an amplifying circuit, an automatic control system and a motor. One end of the telescopic rod structure is arranged in the automatic card taking and swiping device body, and the other end of the telescopic rod structure is connected with the card taking and swiping panel. The card taking and swiping panel is provided with a card taking button, a card taking area and a card swiping area. By utilizing the intelligent induction type automatic card taking and swiping device, the time when vehicles pass through a highway tollgate can be shortened, the jamming conditions of the vehicles are reduced, and meanwhile hidden safety hazards in the passing process for drivers and the vehicles can be lowered. Accordingly, the purposes of being safe and efficient are achieved.
Owner:林诗宸

Disposable degradable plant fiber tableware and preparation method thereof

InactiveCN109370244AAlleviate air pollution problemslow cost of preparation
The invention provides disposable degradable plant fiber tableware and a preparation method thereof. The disposable tableware is prepared from the following raw materials in parts by weight: 90-100 parts of plant fibers, 20-30 parts of polyvinyl alcohol, 10-15 parts of modified starch, 4-8 parts of modified calcium carbonate powder, 20-40 parts of waterproof glue and 6-10 parts of carboxymethylcellulose. The preparation method comprises the following steps: crushing, grinding, mixing and dissolving, forming, gluing, drying and disinfecting the components to obtain a product. The disposable degradable plant fiber tableware is non-toxic and harmless and clean and sanitary. The preparation process is environment-friendly and pollution-free. The disposable degradable plant fiber tableware is high in degrading speed in a spontaneous combustion environment, and can be recycled if being immersed into soil as a fertilizer for plants. The disposable degradable plant fiber tableware are easily available and cheap in source of raw materials and regenerative, agricultural resources are comprehensively utilized favorably, and meanwhile, the air pollution problem caused by crop straw combustionis also alleviated, and the white pollution problem caused by use of a plastic product in a large range can be also alleviated effectively.
Owner:席小兵

Annular photonic crystal, and preparation method and application thereof

The invention relates to an annular photonic crystal, and a preparation method and an application thereof. Emulsion containing mono-dispersed colloidal microspheres of same particle diameters and two emulsions containing mono-dispersed colloidal microspheres of different particle diameters or one of a plurality of emulsions containing mono-dispersed colloidal microspheres of different particle diameters are dispersed, sprayed or printed by jetting ink on the surface of a solid substrate and then dried; then, one or more residual emulsions containing mono-dispersed colloidal microspheres are dispersed, sprayed or printed by jetting ink successively; and then, the single-band-gap, double-band-gap or multi-band-gap annular opal structured photonic crystal, the photonic band gap of which is in the region of ultraviolet light, visible light or infrared light, can be obtained. An annular reverse opal structured photonic crystal can be prepared by taking the prepared annular opal structured photonic crystal as a sacrificial template. The preparation method is simple for operation and low in cost and is applied to preparing annular photonic crystals in a large scale. The prepared annular photonic crystal has important application in the fields, such as spectrometers, photonic crystal filters, reflected light sheets, tunable photonic crystal lasers and the like.
Owner:INST OF CHEM CHINESE ACAD OF SCI +1

Method for preparing semicylindrical minute groove by utilizing secondary film deposition and wet etching

InactiveCN101723307Alow cost of preparationEfficient Processing Path
The invention relates to a method for preparing a semicylindrical minute groove by utilizing two-time film deposition and wet etching, which comprises the following steps of: depositing a film on a quartz substrate by adopting a conventional technology, coating a photoresist on the film, photoetching, developing and firming a mould; using a photoresist graph for shielding and isotropical characteristics of wet etching and using an etching solution to etch the film below the edge of the photoresist graph to form an air gap with certain width; depositing the film made of the same material on the surface of a structure obtained after the wet etching again and removing the photoresist to obtain a slit having the same width with the air gap; and then utilizing the film for shielding and carrying out isotropical etching on the quartz substrate by using a hydrofluoric acid buffer solution through the slit to obtain the semicylindrical minute groove. The slit with the width range of 700 nanometers to 2.5 microns can be prepared by the method without expensive equipment of electron beams, particle beams, dry etching and the like, and then the semicylindrical minute groove with the diameter width range of 700 nanometers to 2.5 microns and the depth range of 350 nanometers to 1.25 microns is obtained through controlling the condition of the wet etching.
Owner:INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI

Method using laser interference to induce electrochemical deposition so as to prepare periodic and patterned Fe3O4 nano particles

The invention relates to a method using laser interference to induce electrochemical deposition so as to prepare periodic and patterned Fe3O4 nano particles. The method is characterized in that the light-induced dielectrophoresis and electrochemical deposition technologies are used, a laser interference light source is used as the induction light source, an ITO conductive substrate plated with hydrogenated amorphous silicon thin film is used as the working electrode, a saturated calomel electrode is used as the reference electrode, a high-purity iron sheet is used as the counter electrode, the mixed solution of FeCl2 and FeCl3 is used as the electrolyte, the induction light source is projected to the hydrogenated amorphous silicon thin film, and a photoelectric effect is used to allow an exposure part to generate a virtual electrode; chronoamperometry is used to perform electrochemical deposition on the virtual electrode to generate the Fe3O4 nano particles, and an ordered Fe3O4 nano particle array consistent with a laser interference pattern is obtained. The method has the advantages that the method is simple in equipment and low in preparation cost, high-temperature heating or annealing is not needed, used chemicals are nontoxic and harmless, and the prepared patterned ordered Fe3O4 nano particle array is good in reproducibility and stability.
Owner:CHANGCHUN UNIV OF SCI & TECH

White organic light emitting device with single light emitting layer structure

The invention discloses a white organic light emitting device with a single light emitting layer structure. According to the structure, the white organic light emitting device with the single light emitting layer structure is mainly composed of an ITO glass substrate, a hole transfer layer, an electron blocking layer, a light emitting layer, an electron transfer layer and a composite cathode, wherein the light emitting layer forms a single-layer light emitting layer through a subject-object doping system in a composite mode, subject materials forming the light emitting layer are mCPy, object materials forming the light emitting layer are excimer phosphorescence dye, the doping concentration of the object materials is between 8 wt% and 20 wt%, the light emitting layer can simultaneously emit blue light and red light, and the blue light and the red light are mixed to form white light. A triplet state energy level of the electron blocking layer and a triplet state energy level of the electron transfer layer are both higher than a triplet state energy level of the object materials of the light emitting layer, excition can be effectively bound in the light emitting layer, and an exicition binding structure is formed. The white organic light emitting device with the single light emitting layer structure has the advantages of being simple in structure and stable in chromaticity and efficiency.
Owner:SHANGHAI UNIV
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