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697results about How to "Good repeatability" patented technology

Separation of carbon dioxide (CO2) from gas mixtures by calcium based reaction separation (CaRS-CO2) process

ActiveUS20060093540A1Good repeatabilityMaterial nanotechnologyCombustible gas catalytic treatmentReactive separationCarbonation
A reaction-based process has been developed for the selective removal of carbon dioxide (CO2) from a multicomponent gas mixture to provide a gaseous stream depleted in CO2 compared to the inlet CO2 concentration in the stream. The proposed process effects the separation of CO2 from a mixture of gases (such as flue gas/fuel gas) by its reaction with metal oxides (such as calcium oxide). The Calcium based Reaction Separation for CO2 (CaRS—CO2) process consists of contacting a CO2 laden gas with calcium oxide (CaO) in a reactor such that CaO captures the CO2 by the formation of calcium carbonate (CaCO3). Once “spent”, CaCO3 is regenerated by its calcination leading to the formation of fresh CaO sorbent and the evolution of a concentrated stream of CO2. The “regenerated” CaO is then recycled for the further capture of more CO2. This carbonation-calcination cycle forms the basis of the CaRS—CO2 process. This process also identifies the application of a mesoporous CaCO3 structure, developed by a process detailed elsewhere, that attains >90% conversion over multiple carbonation and calcination cycles. Lastly, thermal regeneration (calcination) under vacuum provided a better sorbent structure that maintained reproducible reactivity levels over multiple cycles.
Owner:THE OHIO STATES UNIV

Method for automatically measuring human body dimensions on basis of three-dimensional point cloud data

The invention relates to a method for automatically measuring human body dimensions on the basis of three-dimensional point cloud data. According to three-dimensional human body point cloud data acquired by a laser three-dimensional color human body scanner developed on the basis of independent innovation, the original three-dimensional point cloud data is denoised and the like; and then human body dimensions, which are required by costume design, model measurement and the like and comprise height, body measurements and curve length, are acquired by automatically fetching human body characteristic points and characteristic sections. A measuring system adopted by the invention acquires three-dimensional human body outline data, which can reflect the body form of the human body best, by directly scanning the human body; joint points and outline convex points of the human body can be automatically fetched by a maximum and minimum measurement method and a most convex and concave point method; and characteristics and dimensions of the human body longitudinal sections and cross sections can be directly acquired. The method is convenient in operation, high in speed, high in measuring precision, high in repeatability and suitable for human body measurement on a large scale.
Owner:TIANJIN UNIV

Two-mode nanometer fluorescence labelling material based on rare earth doped sodium gadolinium fluoride core-shell structure and preparation method thereof

A two-mode nanometer fluorescence labelling material based on a rare earth doped sodium gadolinium fluoride core-shell structure and a preparation method thereof relate to a two-mode nanometer fluorescence labelling material with the rare earth doped sodium gadolinium fluoride core-shell structure, in particular to a method which can be used to ensure that the rare earth doped sodium gadolinium fluoride nanometer crystal can have up-conversion and down-conversion luminous modes. The preparation method is as follows: up-conversion ions and down-conversion rare earth ions are doped in the core and shell layers of the sodium gadolinium fluoride nanometer crystal respectively to obtain the two-mode nanometer fluorescence labelling material with the sodium gadolinium fluoride core-shell structure, wherein the material has monodispersity and integrates up-conversion luminescence and down-conversion luminescence. The prepared nanometer fluorescence labelling material with the sodium gadolinium fluoride core-shell structure is xRE<3+>-(1-x)NaGdF4 (RE = Ce, Pr, Nd, Pm, Sm, Eu, Tb, Dy, Ho, Er, Tm or Yb and x is 0-50mol%). A spectrometer is used to measure the luminescence of a sample; and by exciting Gd<3+> and Yb<3+>, the up-conversion luminescence and down-conversion luminescence of rare earth ions can be realized respectively.
Owner:FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI

Composite conductor application of carbon nano tube fiber and preparation method thereof

The invention discloses composite conductor application of carbon nano tube fiber and a preparation method thereof. The invention is characterized in that a high strength carbon nano tube fiber material is combined with electroplating or chemical plating surface treatment process, and conductive metal coating is compounded on the carbon nano tube fiber, thus obtaining a carbon nano tube composite conductor with light weight, high strength and high electric conduction. The preparation method includes the following steps: firstly high strength carbon nano tube fiber material is prepared, and then chemical plating or electroplating is adopted to prepare uniform metal coating on the surface of fiber, thus obtaining the carbon nano tube composite conductor. The type of metal coating and the thickness of metal coating are controlled, so that the conductivity of carbon nano tube conductor can be consistent with the conductivity of metal body. The application and preparation method of the invention are simple and feasible, step is simple, and repeatability is good, thus being applicable to mass production, thereby having significance in development of novel superfine conductor with light weight, high tenacity and high strength and in showing potential application value thereof in electronic industry.
Owner:SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI

Water-soluble carbon quantum dot and preparation method thereof

The invention discloses a water-soluble carbon quantum dot and a preparation method thereof. The preparation method of the water-soluble carbon quantum dot comprises the following steps of: sealing a mixed solution to a hydrothermal kettle for carrying out hydrothermal reaction by using aldehyde group-containing saccharide carbohydrate as a carbon source and using noble metal salts as an oxidant and catalyst; centrifuging and separating the obtained product to obtain an aqueous solution of the carbon quantum dot; separating the aqueous solution through an ultra-filtration centrifugal tube or an ultra-filtration membrane, collecting the filtered solution, drying the filtered solution under vacuum to obtain the carbon quantum point. The carbon quantum dot prepared by the preparation method disclosed by the invention can stably exist in the aqueous solution for a long time, is uniform in dimension distribution, high in fluorescence intensity and adjustable in light-emitting wavelength with the laser wavelength. Meanwhile, the surface of the carbon quantum dot is rich in carboxyl and hydroxyl, easy to realize surface functionalization and capable of being extensively applied to the fields including the biological field, the chemical field, the material field and the like. The preparation method disclosed by the invention is simple, good in repeatability, easily available in materials, short in preparation period, low in cost and easy for popularization.
Owner:SUZHOU UNIV

Catalyst for preparation of ethanol through acetic acid hydrogenation and preparation method thereof

The invention relates to a catalyst for preparation of ethanol through acetic acid hydrogenation and a preparation method thereof, and provides a catalyst for preparation of ethanol through acetic acid hydrogenation, which is environment-friendly, mild in conditions, excellent in catalysis performance and high in stability, and a preparation method thereof. The catalyst comprises the following components in percentage by mass: 0.5-2% of platinum, 0.5-6% of tin and the balance of carrier; and the composition of the catalyst is expressed as x%Pt-y%Sn/carrier, wherein x% represents the mass percent of Pt in the catalyst, y% represents the mass percent of Sn in the catalyst, and the carrier is silicon carbide or carbon nanotube. The preparation method of the catalyst comprises the following steps: mixing surfactant sodium lauryl sulfate with the platinum and tin components; then adding the carrier; performing liquid-phase reduction to prepare a catalyst precursor; and roasting the catalyst precursor under the air atmosphere to obtain the supported platinum-tin bimetallic catalyst for acetic acid hydrogenation. The invention has the advantages of simple preparation process and good repetitiveness, and is easy to implement scale-up production.
Owner:XIAMEN UNIV +1

Slice production method for treating tobacco waste extract by using membrane separation technology

The invention discloses a slice production method for treating tobacco waste extract by using membrane separation technology, and belongs to the technical field of tobacco slice production by a papermaking method. The method is carried out by the following steps in turn: (1) extracting, (2) separating, (3) removing impurities, namely removing the impurities in the tobacco waste extract through a membrane separation device, (4) concentrating, namely concentrating the obtained ultra-filtrate after impurity removal through a nano-filtration membrane separation device, (5) coating, and (6) drying. The method has the main advantages that the separation process is easy to control, has good repeatability, and is suitable for industrialized production conditions. By adopting a nano-filtration membrane to remove the impurities, macromolecular substances such as protein, pectin and the like in an extract system can be effectively intercepted. Substances influencing the sensory quality of the tobacco slice in the obtained ultra-filtrate basically do not exist. Small molecular substances such as amino acid, monosaccharide, nicotine and the like in the system are kept, and the substances can improve the quality of the tobacco slice.
Owner:HUBEI CHINA TOBACCO IND +1

Measuring method for adhesive strength of flexible substrate material coating

The invention relates to a measuring method of adhesive strength, and in particular relates to a measuring method for adhesive strength of flexible substrate material coating. The measuring method for adhesive strength of flexible substrate material coating comprises the following steps: measuring the interior binding power of the coating and measuring the bonding strength between the coating and a substrate; the measurement of the interior binding power of the coating comprises the following steps: calculating the interior binding power of the coating according to the formula: theta=F/S, wherein F is stripping force, S is the width of the binding strip; the measurement of the bonding strength between the coating and the substrate comprises the following steps: winding a coating body on stainless steel bars with different diameters, and calculating the strength value of the binding power between the coating layer and the flexible substrate according to the separation state between the coating layer and the flexible substrate during winding. According to the measuring method, the repeatability is good, the operation is simple, the defects that the measurement result subjectivity is strong and the repeatability and the veracity are poor in the grid method in the prior art can be overcome. The defect that the coating is impacted by 180-degree bending during the testing process of the stripping method is also overcome, and the interior adhesive force of the coating and the adhesive force between the coating and the flexible substrate are separately measured.
Owner:SHANDONG HUAXIA SHENZHOU NEW MATERIAL

Preparation method of polystyrene-divinylbenzene microspheres for bilirubin adsorption

The invention provides a polystyrene-divinylbenzene microsphere used for absorbing bilirubin. The diameter of the polystyrene-divinylbenzene microsphere ranges from 5 Mu M to 25 Mu M, which is controllable. The polystyrene-divinylbenzene microsphere is monodisperse and porous with the specific area from 200m<2>/g to 800m<2>/g. The polystyrene-divinylbenzene microsphere is prepared with styrene and divinylbenzene as a monomer and a cross-linking agent, as well as toluene, ethylbenzene, normal heptane, normal octane, n-heptyl alcohol or the mixture of the toluene, the ethylbenzene, the normal heptane, the normal octane and the n-heptyl alcohol as a pore-foaming agent by adopting the seed swelling polymerization method. In the method for preparing the polystyrene-divinylbenzene microsphere, seed solution and the emulsion prepared with the monomer, the cross-linking agent and the pore-foaming agent are further swollen and polymerized to get the polystyrene-divinylbenzene microsphere which is applied for absorbing bilirubin in solution or blood. The polystyrene-divinylbenzene microsphere has the advantages that the diameter of the microsphere is uniform and is controllable in a range, and the microsphere is very efficient for absorbing or removing bilirubin in solution or blood; the preparation process is simple and highly repetitive, which can be executed in large scale.
Owner:DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI

Color measurement color difference instrument and color measurement method thereof

InactiveCN101183025AEliminate light intensity instabilityGood repeatabilityRadiation pyrometryMaterial analysisOptical pathInstability
The invention provides a color difference meter for color measurement and a color measuring method thereof and belongs to the technical field of color measurement. A LED light source is connected with a light path of a collimation lens through an arranged ground glass and an aperture, the back part of the collimation lens is provided with a spectroscope, wherein, the reflected light is connected with the light path of a reference light sensor after reflected by the reflector; the transmission light is connected with the light path of an integrating sphere; the reference light sensor and a measurement light sensor connected with and arranged on the integrating sphere are respectively connected with an embedding processor in a transmission way; the integrating sphere is provided with a sample pool corresponding to the position of the transmission light. The invention adopts the light source consisting of a blue chip, a purple chip and flurescent powder, the reference light sensor is adopted to monitor light source fluctuation and eliminates non-stability of the light intensity of the LED light source as well as reduces the error due to the light source fluctuation. The reference light sensor and the measurement light sensor transforms the optical signal into the electric signal and then the electric signal is sent into the embedding processor after processing, at last, color measurement or color difference measurement can be achieved after the procession of the embedding processor. The invention has simple structure, low power consumption and good repetitiveness of the detected result.
Owner:CHINA JILIANG UNIV

Multi-scale uniform and single-dispersion magnetic microsphere and preparation method thereof

The invention discloses a multi-scale uniform and single-dispersion magnetic microsphere and a preparation method of the multi-scale uniform and single-dispersion magnetic microsphere. The multi-scale uniform and single-dispersion magnetic microsphere comprises spinel structure ferrite doped with transition metal elements, the microsphere is a polycrystal micro-nano sphere which is formed by nanocrystalline in an aggregation mode, the diameter of the microsphere ranges from 20nm to 1.23 micrometers, the specific surface area of the microsphere ranges from 0.94 m<2>*g<-1> to 17.31 m<2>*g<-1>, and the size of the nanocrystalline ranges from 9.2nm to 25.8nm. A mixed solvothermal method is adopted, and the size and the composition of particles can be adjusted through adjustment of the volume fraction of water or the ratio of iron to other transition metal salt. According to the preparation method, raw materials are low in price, and can be easily obtained, the cost is low, the technology is simple, the requirement for equipment is low, efficiency is high, and popularization is easy; the multi-scale uniform and single-dispersion magnetic microsphere has the advantages that single dispersion and uniformity are good, and the size and the composition can be adjusted; the multi-scale uniform and single-dispersion magnetic microsphere can have the broad application prospect in the fields such as the magneto-rheological field, the magnetic separation field, the catalysis field, the electrode material field, the pigment field, the high-density magnetic recording material field and the medical diagnosis field.
Owner:ZHEJIANG NORMAL UNIVERSITY
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