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99results about How to "The production process is fast" patented technology

Method for preparing environmentally-friendly adhesive for lignin-based timber

The invention discloses a method for preparing an environmentally-friendly adhesive for a lignin-based timber. The method comprises the following steps of: 1) adding phenol, formaldehyde solution, lignin, first alkali liquor and diluting water into a reactor, heating to the temperature of between 75 and 85 DEG C and reacting for 2.5 to 3.5 hours, wherein the molar ratio of formaldehyde to the phenol is 2.20:1-2.40:1; the formaldehyde solution is added for three times in a mass ratio of 1.5 to 1.0 to 1.0; and the reaction time ratio of the added formaldehyde solution is 1.2 to 1.0 to 1.0; 2) cooling to 70 DEG C, adding a formaldehyde collector and second alkali liquor, and reacting at the temperature of between 65 and 70 DEG C for 20 to 50 minutes; and 3) cooling to the temperature of between 30 and 40 DEG C, adding an intensifier, stirring for 10 to 30 minutes, cooling and discharging. In the method, a 50 to 60 percent petroleum-based phenol raw material can be substituted; the methodis stable in reaction, easy to control and easy for industrial production; formaldehyde emission of a plywood reaches E0 level; adhesive strength meets the requirements of national class I plates; and a new approach is provided for the development of an environmentally-friendly biomass-based timber adhesive and recycling of wastes.
Owner:青岛生物能源与过程研究所

Gold micro-nano composite structure array and preparation method thereof

The invention discloses a gold micro-nano composite structure array and a preparation method thereof. The array is a gold bowl array or a gold hollow sphere array disposed above a gold film covered on a substrate, wherein the diameter of a gold bow opening is from 500 nanometers to 10 micrometers, a bowl wall is composed of gold rods, the lengths of the gold rods are 100-1000 nanometers, the diameters of the gold rods are 50-400 nanometers, the inner diameter of a gold hollow sphere is from 500 nanometers to 10 micrometers, a sphere casing is composed of gold particles with diameters of 50-600 nanometers, and the thickness of the gold film is 5-25 nanometers. The preparation method includes sputtering a layer of the gold film on the substrate, placing a single layer colloidal crystal template which is composed of polystyrene colloidal spheres with diameters from 500 nanometers to 10 micrometers on the substrate which is covered with the gold film, then placing the substrate covered with the gold film and the colloidal crystal template into a chloroauric acid solution with concentration of 0.3-0.7g/L, using the solution with the substrate as a working electrode, subjecting the mixture to electro-deposition for 2-8 hours under the deposition electric current density of 0.03-0.05mA/cm<2> or 0.15-0.45mA/cm<2> to obtain a complex array, and placing the complex array in a dichloromethane solution for to removing the polystyrene colloidal spheres to obtain target products. The gold micro-nano composite structure array can be used as a surface enhanced raman scattering active substrate.
Owner:HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI

Equipment and process for industrially producing containers by using moso bamboo

InactiveCN102126238AImprove the utilization rate of rotary cuttingSmooth feedingPlywood pressesVeneer pressesThermal insulationAgricultural engineering
The invention discloses equipment and a process for industrially producing containers by using moso bamboo. The equipment comprises a moso bamboo cutter, a moso bamboo joint beating machine for beating internal joints of segment bamboo, a high-temperature segment bamboo softening container, a segment bamboo washing device, a segment bamboo thermal insulation device, a precision moso bamboo rotarycutter for rotationally cutting the segment bamboo, a bamboo sheet length control device, a bamboo sheet drying machine for drying bamboo sheets, a double-sided gluing machine for coating glue on thebamboo sheets, and a bamboo sheet hot-press section forming machine. The process comprises the following steps of: cutting the moso bamboo, beating the internal joints of the segment bamboo, softening the segment bamboo at high temperature, washing the segment bamboo, performing thermal insulation on the segment bamboo, rotationally cutting the segment bamboo into the bamboo sheets, drying the bamboo sheets, coating glue on the bamboo sheets, hot-pressing a plurality of bamboo sheets coated with the glue to obtain bamboo sheet sections meeting the requirements on thickness and dimension, and respectively moulding the bamboo sheet sections in a square container moulding mould, a bamboo sheet cylindrical container moudling mould and a once-setting mould for moulding containers to obtain square containers, cylindrical containers, round or square discs and the like without abutted seams.
Owner:三明市柏毅竹业技术开发有限公司

Method and device for preparing porous ceramic micro beads

The invention discloses a method and a device for preparing porous ceramic micro beads. The method comprises the following steps of: mixing an organic monomer and a crosslinking agent with water according to a certain proportion for dissolving, adding ceramic powder and a dispersing agent into a solution, and performing ball milling to obtain a ceramic suspension with high solid phase content and low viscosity; adding a foaming agent, an initiator and a catalyst into the suspension for stirring to obtain water-based stable foam ceramic slurry; and continuously injecting the water-base slurry into an oily medium of a certain temperature by using the device for preparing the porous ceramic micro beads to form foam slurry spheres, floating and curing into porous ceramic micro bead blanks in the oily medium, collecting, cleaning, drying and sintering to obtain a porous ceramic micro bead product. The invention further discloses a device for preparing the porous ceramic micro beads. The device comprises a micro bead forming tower and an injection gun, and can be used for realizing continuous automatic injection and generation of spheres. The device has universality, and can be used for realizing large-scale continuous production of porous ceramic micro beads which are of different systems and are 0.3-4.0 millimeters in diameter.
Owner:TSINGHUA UNIV

Infrared photoelectric detector and preparation method thereof

The invention discloses an infrared photoelectric detector and a preparation method thereof. The detector comprises a substrate. An optical micro-cavity lower reflecting mirror, a lower optical path difference compensation layer, an upper optical path difference compensation layer and an optical micro-cavity upper reflecting mirror which are arranged on the substrate in turn. A semiconductor carbon nano-material photoelectric device used as a light absorption material and a conductive channel is arranged in an optical micro-cavity. The position of the optical micro-cavity with the maximum cavity state density is overlapped with a working area of the semiconductor carbon nano-material photoelectric device. As for infrared light with the same wavelength, an optical path through the lower optical path difference compensation layer is the same with the optical path through the upper optical path difference compensation layer, or difference of the two optical paths is integral times of half wavelength. Capability of detecting weak infrared light is enhanced, and the micro-cavity is simple and rapid in processing technology. The detector can be applied to interconnection of carbon tube circuit photoelectric devices or interconnection of carbon tubes and silicon integrated circuit sheets so that detection and response of communication wave band infrared light are executed.
Owner:PEKING UNIV

High heat conduction and high attenuation backing material for ultrasonic phased array probe and manufacturing method thereof

A high heat conduction and high attenuation backing material for ultrasonic phased array probe is made from lutecium oxide, alumina, a tungsten compound material and an epoxy adhesive and is characterized in that the epoxy adhesive is prepared by mixing epoxy resin E-54 and triethanolamine; the tungsten compound material is prepared by mixing rubber and a tungsten powder; and the alumina accounts for 10.48-53.04wt% of the backing material. A manufacturing method of the backing material comprises the following steps of: (a) mixing the epoxy resin E-54, lutecium oxide, alumina and the tungsten compound material with stirring, wherein the epoxy resin E-54 accounts for 6.22% the total weight of the backing material and alumina accounts for 10.48-53.04wt% of the backing material; (b) adding triethanolamine which accounts for 0.95% the total weight of the backing material into the above composite particles with stirring; (c) putting the composite particles into a die, and extruding the composite particles into the required backing material by the use of a powder pressing machine; and (d) putting the pressed backing material into an air-blasting heating oven of 65 DEG C for heating-curing. The thermal conductivity of the backing material is 1.782W/(m.k), its specific acoustic impedance is 8.42*106Pa.s/m and its acoustic attenuation coefficient at 5MHz is 294.4dB/cm. The backing material has high thermal conductivity and high attenuation. In addition, the sensitivity and resolution of the phased array probe produced by the use of the backing material can satisfy the requirement for application.
Owner:广州多浦乐电子科技股份有限公司

Efficient environment-friendly low-temperature composite phase change cold accumulating agent, as well as preparation method and application thereof

The invention discloses an efficient environment-friendly low-temperature composite phase change cold accumulating agent. The cold accumulating agent is prepared from the following components in percentage by mass: 5-11 percent of potassium chloride, 10-15 percent of sodium chloride, 0.1-0.6 percent of citric acid, 1-1.5 percent of sodium tetraborate, 0.5-2 percent of guar gum and 70-83.4 percent of water. The invention further discloses a method for preparing the efficient environment-friendly low-temperature composite phase change cold accumulating agent, and application of the efficient environment-friendly low-temperature composite phase change cold accumulating agent in the field of storage and fresh preservation. Compared with a traditional cold accumulating agent preparation process, the process has the characteristics of convenience and rapidness, the prepared cold accumulating agent is transparent or translucent gel, and has the characteristics of safety, no pollution, efficiency, large latent heat of phase change and small condensate depression. Experiments prove that the phase-change temperature is between minus 21 and minus 24 DEG C, and the latent heat of phase change is 280-320kJ/kg.
Owner:南京久鼎环境科技股份有限公司

Preparation method of potassium-sodium niobate leadless piezo-electric ferroelectric ceramic

The invention discloses a method for preparing a potassium-sodium niobate leadless piezo-electric ferroelectric ceramic by a low-temperature normal-pressure complete liquid-state process, belonging to the field of a functional ceramic environment-friendly material. The method comprises the following steps: mixing raw materials in accordance with Na(1-x)KxNbO3, synthesizing precursor powder by using citric acid as a complexing agent and using a soluble salt as a raw material, tabletting at the pressure intensity of 20-40 MPa, and sintering at a temperature of 800-1000 DEG C to obtain a high-density pure-phase ceramic, wherein the ferroelectricity, the piezoelectricity and the dielectric property of the ceramic are excellent, and the process relates to processing steps of raw material mixing, molding, sintering, silver baking, polarizing and the like. The complete liquid-phase process effectively reduces the sintering temperature of the potassium-sodium niobate leadless piezo-electric ferroelectric ceramic, and the high-density ceramic can be molded by pressure under the pressure intensity of a conventional grinding tool; and ceramic particles grow uniformly and well, and the electric performance of the ceramic is excellent. Besides, the preparation process has the characteristics of simplicity, convenience, energy conservation, no poison, no environmental pollution and the like, thereby having wide application prospects.
Owner:HUAZHONG UNIV OF SCI & TECH

Method of preparing alkali lignin modified phenolic resin

InactiveCN101492522BAdequate responseTo achieve the purpose of modifying phenolic resinAldehyde/ketone condensation polymer adhesivesResource utilizationAdhesive
A method for preparing alkali lignin modified phenol-formaldehyde resin comprises the following steps: phenol, a first batch of formaldehyde solution, alkali lignin, metal oxide and dilution water are added into a reactor; a second batch of formaldehyde solution is added into the reactor; and a third batch of formaldehyde solution and a first batch of alkaline solution are added, formaldehyde trapping agent and a second batch of alkaline solution are added, and then material is discharged after cooling. The invention adopts the copolymerization technique to prepare an alkali lignin phenol formaldehyde adhesive, lignin and the phenol are added simultaneously, obtained hydroxymethylated lignin is reacted with hydroxymethyl phenol, a small part of the obtained hydroxymethylated lignin participates in the polycondensation of the hydroxymethyl phenol to form a main chain, and a large part of the obtained hydroxymethylated lignin forms branch chains through graft copolymerization, therefore, the lignin is introduced into a molecular chain and the aim of modifying phenol-formaldehyde resin is achieved. The invention can replace the use of 30-50 percent of the phenol, realizes stable and easy reaction control and easy industrial production; the bonding strength satisfies the requirements of national I-level plates; formaldehyde release reaches E0 level; therefore, the invention provides a new approach to the development of environment-friendly biomass-based wood adhesive and resource utilization of waste materials.
Owner:INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY

A performance-adjusting admixture of magnesium phosphate cement-based composite material

The invention discloses a magnesium phosphate cement-based composite material property modifying additive. The additive comprises components in percentage by weight as follows: 9.8%-17.9% of an expanding agent, 4.9%-9.0% of a shrinkage reducing agent, 12.8%-23.3% of organic fibers, 1.4%-5.0% of a fiber dispersing agent, 20.1%-33.0% of a viscosity modifier, 12.2%-33.5% of a thickening time control agent and 4.4%-12.5% of a superplasticizer. The magnesium phosphate cement-based composite material property modifying additive comprises the simple components, the preparation technology is simple and rapid, the environment applicability is high, the usage method can be flexibly chosen according to construction site equipment and technology conditions, and construction operation and efficiency improvement are facilitated; a magnesium phosphate cement-based composite material prepared from the additive has the characteristics of wide thickening time control range, high mechanical property, good volume stability, excellent bonding property, good durability and the like, service performance of magnesium phosphate cement repair materials and reinforcement materials are greatly improved, and application and popularization of the 3D printing technology in the building field are particularly facilitated.
Owner:JIANGSU SOBUTE NEW MATERIALS

Preparation method of functionalized polymer microspheres

The invention relates to a preparation method of functionalized polymer microspheres, belonging to the technical field of preparation of functional polymers. According to the preparation method, an oil-soluble polyfunctionality acrylate monomer, polyethyleneimine and a photoinitiator are used as raw materials, wherein the weight ratio of the polyfunctionality acrylate monomer to the photoinitiatorto the polyethyleneimine to a water solvent is equal to 100 to (1-5) to (5-20) to (500-2000). After the system is uniformly mixed, emulsification is firstly carried out under the action of a high-speed disperser, and ultraviolet light irradiation is performed after the emulsification is finished, so that polymer microspheres of polyfunctionality acrylate are obtained; after that, the polymer microspheres and polyethyleneimine are subjected to a Michael addition reaction, so that the functional polymer microspheres having surfaces modified by active primary amino groups and secondary amino groups. The functional macromolecular microspheres, which are prepared by the method and have aminated surfaces, are low in reaction energy consumption, and the reaction rate and the reaction yield can be adjusted by means of time. The particle sizes of the polymer microspheres can be adjusted within a range of 2-100mu m. The polyethyleneimine not only serves as a stabilizer in a formation process ofthe microspheres, but also can be used as a modifier in a microsphere modification process.
Owner:BEIJING UNIV OF CHEM TECH
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