13 results about "Autocatalysis" patented technology

The invention discloses an anisotropic conductive adhesive film and a preparation method and application thereof.The preparation method comprises the following steps that polyethylene glycol diacrylate, N, N '-dimethylethylenediamine and pentaerythritol tetrakis (3-mercaptopropionic acid) react to synthesize a component A, and then silver nanosheets are dispersed in polyethylene glycol diacrylate to obtain a component B; mixing the component A, the component B and an organic solvent, blade-coating to form a liquid film, regulating and controlling the temperature of a substrate and surface airflow, and curing after the solvent is volatilized to obtain the anisotropic conductive adhesive film. According to the anisotropic conductive adhesive film provided by the invention, the hexa-sulfydryl polymer with an autocatalysis function is used as a matrix, the silver nanosheets are directionally agglomerated in the Z-axis direction to form a continuous conductive path, and the anisotropic conductive adhesive film has high mechanical bonding strength, stable anisotropic conductive performance and excellent flexibility and can meet the connection requirements of flexible hybrid electronic devices.

The invention relates to self-initiated polymerized lignin-based temperature-sensitive gel as well as a preparation method and application thereof, and belongs to the technical field of macromolecular functional materials. In order to solve the problem that polymerization is blocked due to the free radical scavenging effect of lignin under the condition of high lignin content, the invention provides a preparation method of a self-initiated polymerized lignin-based temperature-sensitive gel, and the preparation method comprises the following steps: preparing lignosulfonate and preparing the lignin-based temperature-sensitive gel. By constructing a lignosulfonate ester (LSME)-Fe < 3 + >-APS oxidation-reduction synergistic autocatalysis system, 20-70-second ultra-fast gelation under the room temperature condition is achieved, a double-network structure with chemical covalent bonds and physical dynamic bonds is constructed, and the obtained hydrogel has excellent mechanical strength, conductivity and temperature response performance and can be applied to the field of biomedical materials. The sensor can be used as a flexible strain sensor for detecting multi-scale motion signals of a human body, can also be used for real-time temperature detection and physiological signal acquisition, and shows good reliability and application potential.

The application relates to a Ca3(PO4)2 crystal reinforced zwitterionic hydrogel membrane and a preparation method and application thereof, the application uses PVDF as a base film, the material is low in price, good in mechanical performance, friendly to the environment and good in recycling performance. Through a polyphenol-metal dual autocatalysis method, a layer of zwitterionic hydrogel is simply and efficiently grafted on the surface of the PVDF film without heating and ultraviolet irradiation. Through a mineralization technology, the zwitterionic hydrogel membrane reinforced by inorganic crystals is used for constructing an inorganic crystal reinforced zwitterionic hydrogel membrane, preparing an oil-water separation membrane which is resistant to pollution, good in mechanical performance and long-term stable and cyclic. The inorganic crystal reinforced zwitterionic hydrogel membrane has the advantages of strong hydration performance and high mechanical stability, has a high separation efficiency on oil-in-water emulsion, shows obvious anti-pollution performance and good cyclic stability. The preparation method is simple, convenient to operate, low in energy consumption, easy to handle and free of secondary pollution, meets the green chemistry concept and has a good application prospect in the field of oil-water separation.

The invention discloses an advanced oxidation treatment device and treatment method for printing and dyeing wastewater, and relates to the technical field of sewage treatment.The device comprises a closed reactor, a feeding port is formed in the bottom of the closed reactor, and a discharging port and an exhaust port are formed in the top of the closed reactor; a functional filler layer is arranged in the closed reactor; activating balls and persulfate are arranged in the functional filler layer, the activating balls are formed by soaking Fe3O4 nano-particles and wine brewing wastewater fermentation liquor, and volatile fatty acid adsorbed on the surfaces of the activating balls is at pH gt; when the temperature is 7.5, the persulfate is desorbed and activated to generate sulfate free radicals. According to the invention, an autocatalysis system composed of pH responsive activation balls and persulfate is constructed in the functional filler layer, so that sulfate free radicals can be generated without adding an external agent, and meanwhile, the purpose of reducing carbon emission by inhibiting the activity of methanogens through metabolic competition is achieved.

The invention discloses a full-automatic catalyst integrated preparation system, and belongs to the technical field of catalyst preparation, a working platform is provided with a first support cylinder, the first support cylinder is internally provided with a working cylinder, one end of the working cylinder is rotatably provided with a first side door, the other end of the working cylinder is provided with a second side door, and one side of the first side door is provided with a heating working box; a plurality of first heating rods are installed on the side, close to the first side door, of the heating working box, first film scraping rods are symmetrically arranged on the two sides of the first heating rods, the first heating rods and the first film scraping rods penetrate through the first side door, and electric heaters evenly distributed in an annular array are arranged in the first supporting barrel and located on the periphery of the working barrel; a quantitative feeder, a liquid guide pipe and a gas guide pipe are mounted on the second side door in a penetrating manner, and the thickness of a heat conduction layer between the first heating rod and a reactant and between the second heating rod and the reactant is reduced through the first film scraping rod and the second film scraping rod, so that a nanoscale catalyst powder product is automatically and integrally prepared.

The invention discloses a CRISPR (clustered regularly interspaced short palindromic repeats) detection method and kit based on an autocatalytic feedback loop and application of the CRISPR detection method and kit. The method comprises the following steps: providing a sample to be detected; the method comprises the following steps: preparing a reaction system containing Cas12a protein, target specific crRNA1, a hairpin structure fluorescent probe, a short-chain ssDNA auxiliary chain, an autocatalytic crRNA auto and a buffer solution; adding a to-be-detected sample into the reaction system, and carrying out constant-temperature reaction. When crRNA1 guides Cas12a to recognize target nucleic acid, the trans-cleavage activity of the Cas12a is activated, and the hairpin probe is cleaved; the cleavage hairpin probe is dissociated into two single chains, one single chain and a short ssDNA auxiliary chain are combined with crRNA auto together to cooperatively activate Cas12a, an autocatalysis positive feedback loop is formed, and exponential amplification of a fluorescence signal is achieved. According to the invention, high-sensitivity, rapid and single-enzyme-driven nucleic acid detection can be realized without pre-amplification of target nucleic acid, and the method is suitable for on-site instant detection.

The invention relates to the technical field of power equipment protection, in particular to a zinc oxide resistor disc breakdown path analysis method and system. The method comprises the following steps: acquiring a microstructure model of the zinc oxide resistor disc, and establishing a three-field coupling control equation set of a potential field, a temperature field and a sequence parameter field; the evolution of the sequence parameter field is driven by a free energy functional, the phase separation barrier energy of the functional is a nonlinear decline function of local temperature, and an electric energy item is coupled with a sensitivity factor with a larger value at a crystal boundary; the evolution equation further comprises a disturbance term related to the electric field gradient and Joule thermal product and an autocatalysis term related to the current density and the global damage degree; the equation set is solved, and the penetrating connected domain with the sequence parameter value lower than the threshold value is determined as the breakdown path. According to the scheme of the invention, the prediction of the breakdown initiation position has more physical basis, the process simulation is closer to reality, and the scientificity of breakdown path prediction is improved.

The invention relates to the technical field of polyurethane adhesives, and discloses a heat-conducting polyurethane structural adhesive based on polyhydroxy diamine autocatalysis and a preparation method thereof.The heat-conducting polyurethane structural adhesive is composed of a component A and a component B. The mass ratio of the component A to the component B is 1: (0.8-1.2), and the component A is prepared from, by weight, 25-35 parts of modified castor oil polyol and 0.8-3.2 parts of a polyhydroxy diamine autocatalysis system; 3-6 parts of a water absorbent, 40-85 parts of a composite heat-conducting filler, 0.5-1.5 parts of a wetting dispersant, 0.3-0.8 part of a tackifier and 0.3-1.4 parts of a thixotropic agent. According to the scheme, an autocatalysis system compounded by tetrahydroxy diamine and trihydroxy diamine is adopted, a metal catalyst does not need to be additionally added, the environmental protection risk and migration problems caused by organic tin are avoided, catalytic activity and filler wettability are considered, the high-filling heat-conducting filler is effectively dispersed, meanwhile, a cross-linked structure is regulated and controlled, hygroscopicity is reduced, and the thermal conductivity is improved. And in combination with a phosphorus-containing component, aluminum interface bonding is enhanced, the bonding stability after damp-heat aging is improved, and the comprehensive requirements for heat conduction, bonding and environmental protection in the fields of new energy and the like are met.

The invention provides an anode for a PEM water electrolyser and a preparation method thereof.The anode comprises a stainless steel substrate and a layered oxide structure generated on the surface of the stainless steel substrate in situ, and the layered oxide structure comprises a manganese-poor inner layer and a manganese-rich outer layer; the manganese-rich outer layer comprises a crystal manganese oxide secondary outer layer and an amorphous iron-containing manganese oxide outermost layer. The layered oxide structure on the surface of the anode can keep long-time water electrolysis catalytic activity and stability under the acidic condition, and the problems of corrosion and stability of autocatalytic and non-noble metal electrodes under the acidic environment are solved through proper surface structure component selection. According to the anode, the cost of hydrogen production based on a noble metal catalyst at present is remarkably reduced, and the problem of high cost of PEM large-scale electrolytic hydrogen production is expected to be solved.

The invention belongs to the field of heavy anti-corrosion coating engineering, and discloses a mining anti-rust and anti-corrosion multifunctional nano composite adhesive coating and a preparation method thereof.A coating main agent and a curing agent are prepared according to the weight ratio of 5: 1, and a nickel acetate amine complex and nano silicon dioxide are added into the main agent; in the curing process of the coating, metal ions and iron atoms on the surface of a base material are subjected to an atom interpenetrating alloying reaction, an intermetallic compound layer is synchronously formed, micro-nano roughness is constructed by means of nano silicon dioxide and a fluorinated acrylate copolymer, and a super-hydrophobic surface is achieved. According to the process, primer or an external heating source is not needed, surface drying can be rapidly cured, meanwhile, active sites are reserved, and a new metal compound can be generated through automatic catalysis after micro-damage so as to seal cracks; the coating can block invasion of corrosive media for a long time in salt mist, seawater and strong acid and alkali environments, and is suitable for heavy-duty anticorrosion scenes of mines and ocean platforms.

The invention relates to the technical field of detection, and discloses a defect topology gold particle triple detection card based on gold growth autocatalysis signal amplification and a preparation method and application thereof.According to the scheme, on the basis of the high-specific-surface-area signal amplification characteristic of defect topology gold particles, specific antibody labeling and a precise assembly process are combined, and CRP, MxA and (1, 2, 3, 4-tetramethyl-3-pentanediol monoisobutyrate, MxA and (1, 2, 3, 4-tetramethyl-3-pentanediol monoisobutyrate) triple detection is achieved. 3) efficient detection of the tri-index of-beta-D glucan is realized, detection sensitivity, specificity and stability are taken into consideration, and the problems of weak signal and low single-index detection efficiency of a traditional detection card are solved. According to the scheme, gold growth enhancement liquid (a mixture of HAuCl4 and NH2OH. HCl) is dropped after detection, the defect topological gold particles catalyze the reduction reaction of HAuCl4 and NH2OH. HCl to generate new defect topological gold particles, the new defect topological gold particles are rapidly deposited and cover the surfaces of the initial defect topological gold particles, the defect topological gold particles with larger sizes are formed, and the defect topological gold particles with larger sizes are obtained. Therefore, gray black precipitates are generated on the T line and the C line of the test strip, and obvious signal amplification is formed.

The invention relates to the technical field of synthesis of dihydroxyethyl cyclohexylamine, and provides a method for preparing dihydroxyethyl cyclohexylamine through autocatalysis. The preparation method comprises the following steps: carrying out autocatalytic addition reaction on cyclohexylamine and ethylene oxide to obtain dihydroxyethyl cyclohexylamine; the autocatalytic addition reaction comprises a low-temperature initiation stage, a high-temperature reaction stage and a curing stage in sequence. According to the method, ethylene oxide occupies the positions of two reactive hydrogen of amino in cyclohexylamine through a low-temperature initiation stage, a large amount of physical and chemical adsorption is formed, then the temperature is raised, the addition reaction is preferentially carried out according to the reaction activity, and finally the two reactive hydrogen on cyclohexylamine are preferentially and uniformly added with ethylene oxide respectively, so that the reaction yield is improved. The generation of polyethyoxyl cyclohexylamine is avoided. According to the method, no catalyst needs to be added, autocatalysis is formed through control over reaction conditions, the reaction is rapid, operation is easy, the refining process is omitted, the purity of the target product is high, and the purpose of atomic-scale directional synthesis is achieved.

This invention relates to the field of electroplating solution replenishment control technology, and discloses an online analysis and replenishment control system for cyanide-free electroplating solutions for semiconductor packaging. The system includes: a parameter acquisition and concentration extraction module, a kinetic decay assessment module, a Faraday consumption calculation module, a replenishment acceleration rate prediction model construction module, and a control command conversion module. By acquiring operating environment parameters and macroscopic concentration data, the system calculates the spontaneous kinetic degradation rate, quantifies the latent losses in the non-energized state, calculates the electrochemical Faraday consumption rate, constructs a replenishment acceleration rate prediction model, calculates the replenishment acceleration rate control quantity, and converts it into the control command pulse frequency to drive the metering pump assembly, injecting replenishment solution into the circulation pipeline. This invention actively compensates for the non-electrochemical losses of the complexing agent, avoiding the metal ion disproportionation autocatalysis caused by relying solely on concentration feedback lag, thereby improving the long-term stability and process yield of cyanide-free electroplating solutions in high-precision semiconductor packaging.