175 results about "Autocatalysis" patented technology

The invention discloses a preparation method of a load-type silver nano-composite material. The preparation method comprises the steps of modifying a carrier by an aminosilane coupling agent and glutaraldehyde in sequence; dispersing the modified carrier in ethanol and then adding a silver-ammonia solution; gradually heating the mixed solution to over 80 DEG C; reducing Ag ions by aldehyde groups on the surface of the carrier, thereby forming an Ag cluster on the surface of the carrier; and catalyzing ethanol by the Ag cluster to react for generating acetaldehyde, thereby further reducing the residual Ag ions and facilitating further growth of the Ag cluster, wherein, catalytic reaction and reduction reaction are carried on continuously, thereby realizing the autocatalysis growth of Ag nano-particles and finally generating the composite material with the carrier being coated by the silver nano-particles. The control on the size of the silver nano-particles and the coating degree can be realized by virtue of control on the reaction time and the dosage of silver-ammonia ions and ethanol.

The invention discloses an autocatalytic crosslinking silicone-epoxide composite sealant and preparation method thereof. The sealant comprises an alpha, omega-dihydroxy polysiloxane, a low molecular weight epoxide resin, an alpha-aminomethyl trialkoxy silane and a filler. The invention has simple preparation method and solves problems in the prior catalytic silicone sealant of great catalyst toxic and side effects and weak bonding capability. The low molecular weight epoxide resin increases bonding performance of the sealant, and the alpha-aminomethyl trialkoxy silane crosslinks the silicone and the epoxide component simultaneously without additional catalyst. The invention has rapid curing rate, good thermal stability of vulcanizate, and applicability in adhesion and sealing of energy saving lamp and car lamp.

Disclosed is a method for making fatty acid methyl ester sulfonate with low disodium salt content by an early sulfonation and late esterification process, which belongs to the organic synthesis technique field. The method adopts Alpha-sulfo fatty acid obtained from fatty acid by sulfonation reaction firstly as a raw material, then uses methanol to implement the autocatalysis esterification for obtaining an Alpha-sulfo fatty acid methyl ester intermediate; then the target product of fatty acid methyl ester sulfonate (MES) is acquired through the bleaching by hydrogen peroxide and neutralization by sodium hydroxide in a methanol solution phase. Compared with the traditional method for preparing MES, the method need no operation of secondary esterification, so as to reduce the unit operation and shorten the flow on the one hand; on the other hand, the method need no strong acid or strong base for catalysis because the methyl esterification of Alpha-sulfo fatty acid is the catalytic reaction, so the separation step and the three wastes produced in the step are reduced; and the last one, because of the adoption of the NaOH neutralization process in the methanol solution phase, the major product of Alpha-sulfo fatty acid methyl ester sodium salt in the MES product will not be hydrolyzed into the undesirable Alpha-sulfo fatty acid disodium salt byproduct easily, so the product has good quality.

The invention relates to ultrahard organosilicone hydrophobic glass resin which is prepared by mixing hydrogen-containing polymethylhydrosiloxane, vinyl MQ silicon resin, polyhydroxy polysiloxane, amino silicon oil and a diluent for reaction with a silane coupling agent and polyvinylsilazane under the action of a Karsted catalyst. The invention further provides a preparation method of the ultrahard organosilicone jydrophobic glass resin. The ultrahard organosilicone jydrophobic glass resin prepared according to the preparation method disclosed by the invention can realize autocatalysis for crosslinking solidification at room temperature, and a coating film is uniform, transparent and not cracked; furthermore, the ultrahard organosilicone hydrophobic glass resin is high in compactness, hydrophobicity and stain resistance; a contact angle between the coating film and water is greater than 120 degrees, and the visible light transmittance is higher than 85 percent, and the ultrahard organosilicone hydrophobic glass resin can resist a temperature being 500 DEG C or higher.

The invention discloses a compound material which takes nano inorganic power as an autocatalysis active surface as well as a preparation method thereof, and belongs to the field of compound material. The invention is characterized in that a nano inorganic power layer is used as the bedded compound material of the autocatalysis active surface; fiber, plastic, fabric, resin, glass, ceramics, monocrystal line silicon and metals are used as the material of a substrate; the nano inorganic power like nano titanium dioxide or nano magnesia or nano zinc oxide or nano alumina, or nano zirconia, or nano nickel oxide, or nano jewellers putty, or nano cobalt oxide is used as an autocatalysis active material; an layer of nano inorganic power film is coated on the surface of the substrate material by adopting a dipping coating method and is used as the autocatalysis active surface; then a chemical method is adopted to load metals on the autocatalysis active surface of the nano inorganic power to develop the bedded compound material which has high quality and low cost, and takes the nano inorganic power as the autocatalysis active surface. The nano inorganic power is used as the autocatalysis active surface to replace the heavy metals of platinum, palladium and sliver in the traditional chemical plating, thus saving the heavy metals, reducing the product cost, shortening the technique flow and reducing the environment pollution.

The invention relates to a method for preparing biodiesel from germinated oil crop seeds serving as a raw material through autocatalysis. The method comprises the following steps of: soaking oil crop seeds in clear water for 12 hours, and performing germination culture on the soaked oil crop seeds in the dark at the temperature of between 15 and 35 DEG C; performing freeze drying on the germinated oil crop seeds at the temperature of between -50 and -20 DGE C for 12 to 48 hours and then crushing the freeze-dried oil crop seeds; adding an organic solvent and short-chain alcohol into the germinated oil seed powder in turn, wherein 1 to 15ml of the organic solvent is added into every gram of the germinated oil seed powder, and the short-chain alcohol accounts for 2 to 10 percent of the mass of the germinated oil seed powder; and putting the mixture in a temperature-controlled reciprocating water bath shaker and performing esterification and ester exchange reaction for 4 to 24 hours to finally obtain the biodiesel, wherein the yield of the biodiesel is between 40 and 70 percent. In the method, a catalyst is not needed, the organic solvent is used as an oil extracting agent for oil seeds and as a protective agent of lipase, and the oil extraction process and the esterification process are combined as one process, so that cost input from oil extraction and refining is eliminated.

The invention discloses a technique for preparing dichloropropanol by the autocatalytic reaction of glycerol and hydrogen chloride. Glycerol and hydrogen chloride carry out autocatalytic reaction at the temperature of 105 to 160 DEG C and the pressure of 0.05 to 0.5Mpa, and the water generated in the reaction is distilled and removed. The invention also discloses a system for preparing dichloropropanol by the autocatalytic reaction of glycerol and hydrogen chloride gas. By adopting the technique of autocatalytic reaction of glycerol and hydrogen chloride, the invention avoids the using of catalyst, lowers production cost obviously, eliminates the formation of by-products with high boiling point, improves reaction selectivity and has the advantages of simple technique and low production cost. The system can transform glycerol fully and greatly improves the selectivity of dichloropropanol; the purity of the dichloropropanol obtained finally is more than 99.5 percent.

The invention discloses a preparation method of phenolic hydroxy autopolymerization hydrogel, and belongs to the technical field of a biological material. In the invention, an oxidation-reduction reaction is performed between specific metal ions and organic matter containing phenolic hydroxy to generate quinonyl free radicals, and simultaneously, the quinonyl free radicals and a complex formed with the metal ions and the organic matter containing the phenolic hydroxy synergistically and efficiently catalyze persulfate to generate hydroxyl free radicals; finally, double bonds of a dual-bond compound are opened to polymerize to form a hydrogel network. In the invention, a metal ion-phenolic hydroxy complex catalytic system can carry out autocatalysis by generating the quinonyl free radicalsto generate the hydrogel; different from a conventional chemical crosslinking process, the preparation method enables a crosslinking network to be homogenized, proposes a brand new principle and ideafor polymerization of the hydrogel, does not require addition of a crosslinking agent and an assistant and auxiliary conditions, and is high in gel forming rate and excellent in gel forming effect.

The present invention discloses size controlled and stabilized nano-aggregates of molecular ultra small clusters of noble metals and a process for the preparation thereof. The present invention discloses single source multicolor noble metal spherical and uniform nano aggregates of 10-22 nm made up of discrete molecular ultra small noble metal (Nb) nanoclusters (MUSNbNC's) of 1-6 atoms. The MUSNbNC's are capped with amine/DCA (dicarboxy acetone) group acting as a steric and kinetic hindrance for core growth suppressing the further autocatalysis and conversion of super critical nucleus or growth by ripening and formation of nanoparticles and thus having intense fluorescence.

The invention relates to a printed circuit addition manufacturing method based on copper autocatalysis and chemical copper plating, and belongs to the field of printed electronic technologies. Firstly, prepared catalysis ink is printed on the surface of a substrate to form a catalytic activity circuit image, then, the substrate with the catalytic activity circuit image is immersed in an chemical copper plating solution (containing a high compounding agent) in the first step and undergoes first-step chemical copper plating to form a copper autocatalysis active layer (a copper nano-cluster structure), at last, the substrate with the copper autocatalysis active layer on the surface is immersed in a chemical plating solution (containing a small amount of high compounding agent and an excessive amount of low compounding agent) in the second step and undergoes second-step chemical copper plating, finally the target printed circuit is obtained, the thickness of a copper player is over 20 micrometers, and the electrical resistivity is within the range of 10<6>-10<5>omega.cm. A chemical plating process is directly used for preparing the thick copper conductor layer without electroplating thickening, the process is simplified, cost is lowered, and the prepared printed circuit is good in electrical conductivity. The manufacturing method can be used for manufacturing of printed-circuit boards, radio frequency antennas and other conducting circuits.

The invention provides a method for preparing a quantum-dot single photon source in a hexagonal-prism nano microcavity. The method comprises the steps as follows: step 1, taking a semiconductor substrate, and growing a silicon dioxide layer containing oxidation holes on the semiconductor substrate; step 2, washing the semiconductor substrate, where the silicon dioxide layer grows; step 3, adopting an autocatalysis method to grow a GaAs nanowire on the silicon dioxide layer, and forming a Ga droplet at the top of the GaAs nanowire; step 4, adopting high As pressure processing to consume the Ga droplet at the top of the GaAs nanowire, restraining axial VLS (vapor-liquid-solid method) growth of the GaAs nanowire, and forming a prismatic shaped structure; step 5, depositing a first AlGaAs barrier layer on the side wall of the prismatic shaped structure, and depositing GaAs quantum dots at a low speed on the surface of the AlGaAs barrier layer; step 6, covering the GaAs quantum dots with a second AlGaAs barrier layer; and step 7, growing a GaAs protective layer on the surface of the second AlGaAs barrier layer to finish the preparation.

The invention relates to an epoxy resin adhesive synthesized by alkali lignin through in-situ autocatalysis. A preparation method comprises the following steps: step I, pickling a biomass raw material with sulfuric acid, and filtering and drying the pickled biomass raw material to obtain filter residues; step II, carrying out reaction on alkali liquor with the filter residues, and filtering a reactant to obtain an alkali lignin stock solution; step III, directly adding a phenolic compound in the alkali lignin stock solution, and carrying out in-situ phenolate modification; step IV, directly adding epoxy chloropropane or a derivative thereof in a phenolate lignin solution, and carrying out molecule in-situ polymerization; and step V, rapidly adding cold deionized water in reaction liquid, and brewing obtained precipitates with hot deionized water to obtain final residual viscous substances as the lignin modified epoxy resin adhesive. Processes of alkali lignin molecule extraction, in-situ modification and epoxy resin adhesive synthesis, involved in the invention, are continuous, and the efficiency is greatly improved. Meanwhile, in the alkali lignin in-situ modification and epoxy resin synthesis processes, a catalyst does not need to be added additionally, and autocatalytic reaction is realized.

The invention discloses a preparation method for hemoglobin molecularly imprinted polymers through autocatalysis of ATRP of a self-needed transitional metal catalyst. The method comprises the following steps: using a bromine-contained compound modified electrode as a working electrode, and allowing the working electrode with a reference electrode and a counter electrode to constitute a three-electrode system; placing the three-electrode system into a solution prepared from a functional monomer, a crosslinking agent and hemoglobin molecules, and applying a constant electric potential of minus 0.3 to minus 0.8 V for 60 to 240 min between the working electrode and the reference electrode so as to obtain hemoglobin polymers; and eluating hemoglobin molecules with an eluent so as to obtain the hemoglobin molecularly imprinted polymers.

The invention discloses a phenolic resin adhesive synthesized through in situ alkali lignin autocatalysis. A preparation method of the phenolic resin adhesive comprises the following processes of (1) crushing a biomass material, pickling by using a sulfuric acid, filtering and drying to obtain a filter residue; (2) fully reacting an alkali liquor with the filter residue and then filtering to obtain an alkali lignin liquid; (3) directly adding phenol to the alkali lignin liquid, carrying out phenolic in situ modified reaction; (4) directly adding a formaldehyde solution to a phenolized lignin solution and carrying out molecular in situ polymerization; and (5) adding a little of formaldehyde capture agent urea, further reacting, dewatering and discharging to obtain the lignin-modified phenolic resin adhesive. The processes of alkali lignin molecular extraction and in situ modification and in situ synthesis of the phenolic resin adhesive are continuous and the efficiency is greatly improved. Meanwhile, a catalyst does not need to be added in the processes of in situ modification and synthesis of alkali lignin to form phenolic resin, so that autocatalytic reaction is achieved.

The invention provides an autocatalysis preparation method of a copolymer benzoxazine-resin polymer sphere and belongs to the technical field of polymers. According to the method, on the condition that no catalyst is added, m-aminophenol and formaldehyde are dissolved in a solvent, and after a polymerization reaction, the copolymer benzoxazine-resin polymer sphere is obtained; the solvent is a mixed solution of water and alcohol compounds. The invention further provides a preparation method of a copolymer benzoxazine-resin-based carbon sphere; the method comprises the step that the obtained copolymer benzoxazine-resin polymer sphere is sintered to obtain the corresponding carbon sphere. The obtained copolymer benzoxazine-resin polymer sphere and carbon sphere have the high monodispersity, the size of the resin sphere can be adjusted in a wide range, and the application of the resin sphere is facilitated. The copolymer benzoxazine-resin polymer sphere prepared through the method has the high concentration in a unit reaction system.

The invention discloses a carbon nanotube and hydrogen production system and method with autocatalysis function. The production system includes a quartz sand feeding device, a moving bed reactor, a heat exchanger, an ultrasonic separation device, a carbon nanotube purification device, a methane gas cylinder and a hydrogen storage tank. The moving bed reactor is adopted, cheap and easily availablemethane gas is taken as the carbon source, natural quartz sand is used as an unconventional catalyst for catalytic cracking to produce carbon nanotubes and high purity hydrogen at the same time, alsothe carbon nanotubes loaded on the surface of natural quartz sand are separated and purified, quartz sand does not inactivate in the reaction process as an unconventional catalyst, and shows increasingly high catalytic efficiency with the proceeding of the reaction, and catalyzes methane cracking to rapidly produce carbon nanotubes with large length-diameter ratio, controllable length and high geometric dimension consistency at low cost. The reaction by-product is high purity hydrogen, which can be used as a high value-added raw material of downstream industry, thus further improving the economical efficiency of the whole system.

The invention discloses a DNA molecular logic gate based on DNA ribozyme and a construction method of the DNA molecular logic gate. The DNA molecular logic gate based on DNA ribozyme comprises an input signal, a DNA logic calculation unit and an output signal. In the molecular logic computing system regulated and controlled by the DNA ribozyme, the DNA ribozyme plays multiple roles of an input signal and an output report. Thus, a series of logic gates, including gates, or gates and AND gates, are successfully constructed. In addition, a more complex two-level cascade circuit and a feedback autocatalysis logic circuit are also established. The result is verified by non-denaturing polyacrylamide gel electrophoresis and real-time fluorescence detection. Through the principle design and various experimental verifications, the provided DNA ribozyme regulation and control strategy is a reasonable and feasible method for constructing a complex catalytic molecular calculation model, and may have a wider application prospect in the fields of molecular sensing, nano devices, DNA calculation and the like.