114results about How to "The preparation method is simple and efficient" patented technology

The present invention discloses a self-compacting concrete for CRTS III plate-type ballastless track filling layer. The concrete is prepared from the following raw materials in parts by weight: 270-350 parts of cement, 0-130 parts of coal fly ash, 0-120 parts of mineral powder, 20-50 parts of an expanding agent, 790-900 parts of fine aggregate, 750-900 parts of continuous gradation coarse aggregate, 20-40 parts specific viscosity modified materials, 5.5-8.5 parts of a specific sustained release controllable polycarboxylic acid water reducing agent and 165-180 parts of water. According to the invention, the specific viscosity modified materials and specific sustained release controllable polycarboxylic acid water reducing agent are used in combination to prepare the specific self-compacting concrete for filling layer with good flowability, strong volume stability, low sensitivity for water consumption, small thixotropic time change, low shrinkage and good longevity, thereby reducing theconstruction difficulty of the CRTS III plate-type filling layer and prolonging the sevice life of the ballastless track structure.

The invention discloses a method for preparing silicon oxide nanofiber. The method comprises the following steps of mixing silica sol with a nitrate solution, performing ultrasonic dispersion on the solution, adding ethylenediamine after the dissolution of the nitrate solution, and stirring uniformly to obtain a mixed solution; putting the mixed solution into a stainless steel reaction kettle with a polytetrafluoroethylene liner, standing the reaction kettle in a high-temperature baking oven after the closing of the reaction kettle, and performing a hydrothermal reaction; taking out the reaction kettle and cooling the reaction kettle to room temperature after the completion of the reaction, collecting precipitates in the reaction kettle, and washing the precipitates to obtain a silicon oxide nanofiber crude product; adding the silicon oxide nanofiber crude product into a hydrochloric acid solution, stirring in a thermostatic water bath, removing impurity components from the silicon oxide nanofiber crude product, and performing centrifugal separation to obtain a silicon oxide nanofiber finished product. The method disclosed by the invention has the advantages that not only can the high energy consumption in a nanofiber preparation process through a traditional chemical vapor deposition and thermal evaporation technology be avoided, but also the production is easily expanded by utilization of a hydrothermal synthesis technology.

The invention provides terminal group-functionalized polyethylene which is characterized by comprising the following structure as shown in the specification, wherein PE shows a polyethylene chain, and R has a structure shown by a or b; R1 is selected from H, carries or does not carry hetero atoms (such as O, S, P, N, Cl and I) or alkyl of C1-C15 of aryl (such as phenyl). The invention further provides a preparation method of the terminal group-functionalized polyethylene. The terminal group-functionalized polyethylene is abundant in source of active ingredients; the preparation method is simple and convenient and efficient, low in cost, high in product yield, clear in structure, and excellent in performance, and has wide potential application prospects.

The invention belongs to the technical field of functional materials and magnetic materials, and in particular relates to a functionalized magnetic carbonaceous material and its preparation method and application. One-step synthesis of the process; (2) The surface of activated carbon is doped with magnetic nanoparticles, which improves the easy aggregation of magnetic particles and enables the products to be magnetically separated without causing secondary pollution of water bodies; (3) Controlling the reaction conditions during the preparation process can achieve magnetic Controllable nanoparticle content, silica layer and amino layer; (4) Enhance the dispersion performance of the material by adjusting the mass ratio of activated carbon and magnetic particles in the magnetic activated carbon carrier, and selectively adsorb and remove Pb(II) in wastewater , to achieve the purpose of harmless treatment, and provide the possibility to realize its application and promotion in engineering.

The invention relates to a method for preparing targeted metal nano complex particles with a magnetic resonance contrast imaging function and a near infrared photothermal ablation treatment function in the technical field of nanometers. The method comprises the following steps of: preparing Fe3O4 nanocrystal clusters with high magnetic saturation strength and superparamagnetic properties by a hydrothermal method, wherein the surfaces of the Fe3O4 nanocrystal clusters are coated with chitosan, so that the Fe3O4 nanocrystal clusters have extremely high water dispersibility and remodification properties; then loading gold nanoparticles on the Fe3O4 nanocrystal clusters to form a nano gold shell by a seed growing method; and finally fixing an EFRF antibody on the surface of the gold shell by using a chemical bond to obtain a multifunctional targeted nanoparticle complex. The targeted metal nano complex particles have an MR (magnetic resonance) development effect and an photothermal tumor ablation effect, can be widely applied to the fields of early diagnosis of tumors, tumor treatment and the like, can also be used for evaluation before or after treatment, intraoperative detection andthe like and has the advantages of recycling, no chemo-treatment toxicity and the like.

The invention relates to a nanofiber reinforced polyimide aerogel material and a preparation method thereof.Raw materials comprise water-soluble polyamide acid, polyimide nano short fiber, triethylamine, and water. The prepared polyimide aerogel is low in shrinkage rate, improvement of Young modulus is realized under the condition that the density is substantially unchanged, the comprehensive performance is excellent, the preparation process is simple and easy to operate, environment-friendly effect is achieved, and the application range of the polyimide aerogelis widened.

The invention discloses a preparation method of a near infrared light driving 4D intelligent deformation material. The near infrared light driving 4D intelligent deformation material with near infrared light response anisotropy in spatial dimension is prepared through in-situ radical polymerization by taking mold forming as a preparation method, N-isopropylacrylamide type intelligent hydrogel as amain body material and graphene oxide as a photothermal conversion agent. The near infrared light driving 4D intelligent deformation material prepared by the method has high interface bonding strength, high response speed, high mechanical strength and long service life, and is low in production cost, convenient to process and manufacture and wide in application range; and a new effective method for solving the actual application problem of the near infrared light driving 4D intelligent deformation material is provided.

The invention discloses a preparation method and application of a two-dimensional multi-element metallic nano material. The preparation method comprises the steps that palladium acetylacetonate, bisplatinum, selectable soluble metal salt, a structure regulating agent, polyvinylpyrrolidone and N-N dimethyl formamide are mixed and stirred for 30-120 minutes at room temperature, then molybdenum hexacarbonyl is added to react with the mixture for 1-3 hours at the temperature of 60-80 DEG C, the temperature is increased to be 120-150 DEG C, reaction is conducted for 1-24 hours, the product is naturally cooled to be at room temperature, and then sufficiently washed with the mixture of ethyl alcohol and acetone, and the two-dimensional multi-element metallic nano material is obtained. The two-dimensional multi-element metallic nano material is synthesized through a one-step method, and the two-dimensional ultrathin multi-metal nano electrocatalyst with the size being controllable and the morphology being regular is prepared by regulating reaction kinetics to control different metal nucleation and growth speed and sequence.

The invention relates to a method for preparing ultrafine porous carbon nanoparticles from a metal organic skeleton as a precursor. The method comprises weighing zirconium tetrachloride, biphenyldicarboxylic acid, benzoic acid and N, N-dimethylformamide solution according to a mass ratio of 1: 1.5-4: 5-20: 70-300, carrying out uniform ultrasonic mixing, transferring the mixed solution into a reactor, carrying out heat treatment at a temperature of 100 DEG C for 0.5-2 d to obtain a metal organic skeleton UiO67, heating the metal organic skeleton UiO67 to 550-900 DEG C in an inert gas protective atmosphere in a tubular furnace at a heating rate of 1-10 DEG C/min, carrying out carbonization for 2-5h, naturally cooling the product to the room temperature, and removing metal zirconium through a hydrofluoric acid solution having a mass fraction of 10% so that ultrafine porous carbon nanoparticles are obtained. The method has simple processes. The ultrafine porous carbon nanoparticles have a high specific surface area and regular ultra-micropores, can be used as supercapacitor electrodes and have excellent electrochemical performances.

The invention discloses a quantum dot luminescence encoding microsphere with precisely designable encoding signals. The microsphere comprises a polymer and quantum dots with a large Stokes shift, which is greater than 50 nm. The emission wavelength of the quantum dots is 450 to 750 nm. The invention also discloses an application of the microsphere in detection of one or more target substances. Thespectrums of quantum dots with different emission wavelengths will not overlap with each other, thus energy transfer in multi-color encoding is avoided; the quantum dot luminescence encoding microsphere, which has precisely designable encoding signals, a strong encoding performance, and a large encoding number, is prepared; solved are the problems that the encoding signals cannot be predicted dueto energy transfer in multi-color encoding, the encoding signals cannot be precisely designed, and the encoding number is limited; the preparation of the encoding microsphere is not strongly dependent on experience anymore; the technology barrier and preparation cost of encoded library construction are largely reduced; and the microsphere has a very important meaning and wide application prospectin the field of liquid biochip detection.

The invention provides a bionic immune adsorbent using PAMAM (polyamidoamine) as a spacer arm. The bionic immune adsorbent has the following chemical structure of Gel-PAMAM-AA as shown in the specification, wherein Gel represents a hydroxy-containing hydrophilic carrier; AA represents amino acid; n is 0, 1, 2 or 3; and PAMAM is polyamidoamine dendrimer, the hydrophilic carrier is agarose, cellulose or polyvinyl alcohol, and the amino acid is L-histidine, phenylalanine or tryptophan. The invention also provides a preparation method of the bionic immune adsorbent. By using the dendric macromolecular PAMAM as a spacer arm, the outer surface of the carrier has more active sites for coupling more ligands; by adjusting the position and direction of a triazole ring, the triazole ring is farther from the dendric PAMAM, so that adsorption of target substances is facilitated, and the adsorbent has specific adsorption; and the cost is low, the process is simple, and the reaction condition is mild.

The invention discloses a flexible stretchable conductive material and a device and method for manufacturing the same. A material comprise an elastic matrix, a flexible stretchable conductive mesh, and a plurality of conductive spiral monomers which are arrange in parallel in a row-column manner and are connected into a conductor end-to-end. The method comprises the following steps of: dropping amixture of a conductive helical monomer and an organic solvent onto a metal mask, and low-frequency reciprocating oscillation; Placing a composite body filled with conductive spiral monomer in a heating furnace for heat treatment and welding to form a conductive spiral bundle; Cooling to room temperature; Take out that conductive spiral beam and putting it into a forming die for compaction; Pouring a liquid elastic matrix into the compacted forming die; The flexible stretchable conductive material is obtained by heat curing and demoulding. The invention can effectively avoid the problem of stress concentration and prolong the service life of the material. And the problem of material failure caused by separation of microstructure from elastic matrix after repeated mechanical deformation issolved.

The invention relates to a cellulose nanofiber aerogel photo-thermal interface water evaporation material and a preparation method thereof. Wherein the cellulose nanofibers and the polyvinyl alcohol serve as main body parts of the aerogel, the reduced graphene oxide serves as a photo-thermal conversion material, the butanetetracarboxylic acid (BTCA) serves as a cross-linking agent, and the sodium hypophosphite (SHP) serves as a catalyst. The preparation method comprises the following steps: pouring a certain amount of dispersion liquid containing cellulose nanofibers, polyvinyl alcohol, graphene oxide, a cross-linking agent and a catalyst into a mold for freezing, then performing freeze drying to obtain aerogel, performing cross-linking on the aerogel at a high temperature, and then performing reduction to obtain the cellulose nanofibers. The chemical crosslinking type cellulose nanofiber/polyvinyl alcohol/reduced graphene oxide aerogel photo-thermal interface water evaporation material is prepared. The preparation process of the method is low in cost, and the prepared aerogel has the advantages of being high in mechanical strength, high in water resistance stability, low in density, capable of self-floating, low in heat conductivity, high in photo-thermal performance, environmentally friendly, safe and the like.

The invention discloses a method for preparing a debittered soybean sirup, which comprises the following steps: performing acid deposition by adding an acid for mixing so that the pH is between 3.5 and 5.0, preferably between 3.8 and 4.3; performing flocculation by adding a flocculating agent; and performing separation by separating solid matters and the liquid part, and connecting the solid matters and the liquid respectively, wherein the liquid part is the debittered soybean sirup. The invention also discloses the debittered soybean sirup prepared by the method and application thereof.

The invention provides a wear-resisting, high-toughness and high-strength excavator bucket tooth and a manufacturing method thereof. The wear-resisting, high-toughness and high-strength excavator bucket tooth is prepared from the following element components in percentage by weight: 3.4 to 3.9 percent of C, 2.3 to 2.6 percent of Si, 0.65 to 0.9 percent of Mn, 0.2 to 0.4 percent of Mg, 1.2 to 1.6 percent of Cu, 0.35 to 0.5 percent of Cr, 0.05 to 0.1 percent of Ce, 0.05 to 0.11 percent of Mo, 0.1 to 0.25 percent of Te, 0.05 to 0.08 percent of Y, 0.008 to 0.02 percent of Nd, less than or equal to0.02 percent of P, less than or equal to 0.02 of S and the balance of Fe. The manufacturing method mainly comprises the steps of melting, carrying out spheroidization treatment and inoculation treatment, forging and carrying out heat treatment; the excavator bucket tooth prepared by the invention has good wear resistance and high strength and also has excellent toughness; the manufacturing methodis simple and efficient.

The invention relates to a fatty acid/modified fly ash composite phase change material and a preparation method thereof. The composite phase change energy storage material comprises the following components in parts by mass: 50-55 parts of a monobasic fatty acid or polybasic fatty acid eutectic mixture and 45-50 parts of modified fly ash, wherein the modified fly ash is II-grade fly ash meeting the GB/T1596-2017 national standard, fly ash micro-powder with the particle size of 5-40 microns is obtained through an ultrafine process, and the modified fly ash is obtained through citric acid. Fly ash with different particle sizes is used as a phase change material carrier, a citric acid corrosion modification method is adopted for the phase change material carrier, the adsorption performance and the pore capacity of the fly ash are improved, the fatty acid/modified fly ash composite phase change energy storage material is prepared through a melt mixing method, and the problem that fatty acid-based phase change material liquid is prone to leakage is solved. The preparation process is simple, the raw materials are cheap and easy to obtain, good economic benefits and wide application prospects are achieved, and the compositephase change material can be widely applied to the field of phase-change materials.