10results about How to "Completely destroyed" patented technology

The invention discloses a preparation method of a piezoelectric self-sterilization cotton fabric-based pressure sensor. The preparation method specifically comprises the following steps: step 1, preparing a modified boron nitride nanosheet; step 2, preparing a modified boron nitride nanosheet / Ag-MOF545 composite material; step 3, preparing a modified boron nitride nanosheet / Ag-MOF545 cotton fabric based piezoelectric material; and 4, preparing the self-sterilization cotton fabric based piezoelectric pressure sensor. According to the piezoelectric self-sterilization cotton fabric-based pressure sensor, on the basis of a piezoelectric polarization effect generated by a piezoelectric material, a stimulation signal of external strain is converted into a piezoelectric current signal to be output, and molecular electrolysis is generated on the surfaces of bacterial cells by utilizing the current signal; meanwhile, the electroporation effect generated by the current can destroy the integrity of a bacterial membrane and induce metabolism disorder of bacteria, and as a physical method, due to the fact that no additional antibacterial material needs to be loaded and the broad-spectrum antibacterial effect is achieved, the bacteria can be thoroughly killed while the drug resistance of the bacteria is effectively avoided.

The utility model relates to the technical field of weeding equipment, in particular to unmanned weeding equipment, which comprises an unmanned weeding machine and is characterized in that rotatable weeding blades are arranged at the bottom of the unmanned weeding machine, a crushing device is arranged at the rear end of the unmanned weeding machine, guide plates are arranged on two sides of a feed port at the bottom of the crushing device, and the guide plates are arranged on the rear end of the unmanned weeding machine. A crushing device is arranged at the bottom of the unmanned weeding machine, a crushing rod is rotatably arranged in the crushing device, and a soil turning device capable of longitudinally moving is arranged on one side of the crushing device. The soil turning device capable of ascending and descending is arranged at the rear end of the crushing device, so that the soil turning device turns over the land, grass roots are thoroughly damaged, re-germination is avoided, the purpose of thorough weeding is achieved, and the problem that the grass roots in the soil cannot be removed is solved.

The invention discloses a method for extracting lithium from coal ash through roasting pre-ultrasonic treatment assisted leaching. The method comprises the steps of ultrasonic pretreatment, alkali roasting activation, acid leaching or alkali leaching and the like. According to the invention, ultrasonic pretreatment is carried out before alkali roasting activation, that is, a mixture of fly ash and sodium carbonate is subjected to wet mixing and ultrasonic treatment after a small amount of water is added, so that the obvious effect of saving chemicals and energy is shown; therefore, a better activation effect and a better lithium element leaching rate can be obtained under the conditions of using fewer roasting additives and shorter roasting time, and circular economy and low-cost operation of extracting lithium from the fly ash are promoted. The research shows that the coal ash has very obvious potential as a feasible lithium source, and particularly, the ultrasonic pretreatment can play a very important role in optimization and expansion of industrial application of coal ash roasting leaching.

The application discloses a nano-bubble enhanced reverse osmosis membrane system and an application method thereof, and belongs to the technical field of water treatment membrane separation. The system is composed of a nano-bubble generating and injecting module, a reverse osmosis membrane component and an online cleaning module. 10-200 nm negative nano-bubbles are prepared by ultrasonic cavitation or pressure dissolution method, and are uniformly injected into the water inlet end of the membrane after cyclone distribution. The functionalized membrane is modified by carbon nanotubes / metal organic framework and is decorated with a negative interface, and forms a double electrostatic repulsion layer with the nano-bubbles. Online cleaning is combined with ozone radical oxidation and gas-liquid pulse micro-jet physical peeling to realize drug-free membrane regeneration. The application solves the problems of traditional reverse osmosis membrane pollution, concentration difference polarization and high energy consumption through the synergistic effect of gas-liquid-membrane three phases, and is suitable for industrial production.

The invention discloses an efficient heat dissipation device based on non-Newtonian fluid and metal fins and a preparation method thereof.The efficient heat dissipation device comprises a sealing cover, a base and the porous metal fins, the sealing cover is internally provided with a containing cavity matched with the porous metal fins, the porous metal fins are arranged on the base, and the containing cavity is communicated with the base. The sealing cover covers the base, so that the sealing cover and the base form a sealed cavity structure, a working medium inlet and a working medium outlet are respectively formed in the sealing cover and are connected with an external liquid cooling circulation system, and a cooling working medium is a non-Newtonian fluid; according to the scheme, the non-Newtonian fluid is coupled with the porous fin structure, and the local viscosity of a working medium is actively regulated and controlled by utilizing a high shear field in the porous medium, so that the synergistic strengthening effect of low pump work and high heat exchange is realized.

The present invention discloses an air purification device with integrated pulsed strong light sterilization, comprising a casing, a physical filtering integrated module, an exhaust fan module, a pulsed strong light sterilization lamp module, an exhaust pump unit module and an air outlet module, wherein the physical filtering integrated module, the exhaust fan module, the pulsed strong light sterilization lamp module and the exhaust pump unit module are all installed in the casing; the casing is provided with an air inlet at a position corresponding to the air inlet of the physical filtering integrated module; the air outlet of the physical filtering integrated module is connected to the air inlet of the exhaust fan module, the air outlet of the exhaust fan module is connected to the air inlet of the pulsed strong light sterilization lamp module, the air outlet of the pulsed strong light sterilization lamp module is connected to the air inlet of the exhaust pump unit module, and the air outlet of the exhaust pump unit module is connected to the air outlet module. The present invention can filter and purify the air and sterilize it before use, which has a better air purification effect, and the whole device is quieter, giving users a better experience.

The invention relates to the technical field of persimmon polyphenol extraction, and provides a green and environment-friendly method for extracting persimmon polyphenol from persimmons, and the green and environment-friendly method for extracting persimmon polyphenol from persimmons comprises the following steps: S1, taking persimmons as raw materials, cleaning, drying, crushing, adding a glacial acetic acid aqueous solution, adjusting the pH value to 4-5, adding an enzyme, mixing, and carrying out enzymolysis to obtain a mixed solution I; s2, after the mixed solution I is subjected to alcohol extraction and centrifugation, a liquid part is taken, and a mixed solution II is obtained; s3, adsorbing the mixed solution II with resin, adding an organic solvent for elution to obtain an eluent, and concentrating and drying to obtain persimmon polyphenol; in the step S2, enzymolysis comprises first enzymolysis and second enzymolysis, enzymes adopted by the first enzymolysis and the second enzymolysis are different, the enzyme adopted by the first enzymolysis is pectinase, and the enzyme adopted by the second enzymolysis is composed of hemicellulase and beta-glucosidase. According to the technical scheme, the problems of insufficient yield and purity of persimmon polyphenol extraction in related technologies are solved.

The invention discloses a CFRP / metal composite paper folding thin wall filled automobile energy absorption box, and relates to the technical field of automobile passive protection safety, the CFRP / metal composite paper folding thin wall filled automobile energy absorption box comprises flange plates, and an energy absorption body is fixedly installed between the opposite faces of the two flange plates; the energy absorption body comprises a paper folding metal square tube, a carbon fiber square tube and polyurethane foam, the paper folding metal square tube is arranged on the peripheral face of the carbon fiber square tube in a sleeving mode, and the paper folding metal square tube is in interference fit with the carbon fiber square tube; and the polyurethane foam is filled in the carbon fiber square tube. According to the CFRP / metal composite paper folding thin wall filled automobile energy absorption box, the problems that a traditional energy absorption box is low in specific energy absorption, large in weight, weak in energy absorption capacity, poor in stability and the like are solved, the structure is simple, the initial peak force is low, the energy absorption performance is high, the stability is high, and injuries to passengers during vehicle collision can be relieved to the maximum extent.

The utility model belongs to the technical field of railway turnout switch machines, in particular to a double-leaf wave spring constant pressure static contact group for a high-speed railway switch machine, which comprises a static contact block, three contact points are arranged on the static contact block, and limit blocks are arranged at the upper ends of two sides of each contact point; a left contact piece and a right contact piece are arranged on the left side and the right side of the contact point respectively, and slots are formed in the left contact piece and the right contact piece; according to the utility model, the multilayer wave spring technology is adopted, and the design of slotting in the middle of the contact sheet is adopted, so that the contact surface between the movable contact ring and the contact sheet can be increased, the contact can be improved, the certain flexibility of the contact sheet can be increased, the contact sheet can be attached to the movable contact ring more tightly, and the contact performance of the movable contact ring can be improved. The number of electric contact points is increased, the electric contact is more reliable, and the electrical performance is more excellent.