18results about How to "Reduce the binding force" patented technology

The application belongs to the technical field of ship exhaust purification, and particularly relates to a catalyst for decomposing N2O in the exhaust of a ship ammonia internal combustion engine and a preparation method thereof. 3+ By replacing Co ions in the Co3O4 spinel lattice into the lattice, the doping behavior can effectively reduce the number of hydroxyl groups on the surface of the catalyst, significantly weaken the adsorption and combination ability of water molecules, and thus improve the stability of the catalyst in a high-humidity exhaust environment. As an additive, CeO2 uses its oxygen storage capacity to promote the migration and desorption of oxygen species in the reaction, preventing the deactivation of active sites due to oxygen poisoning. The molecular sieve carrier not only provides a highly dispersed surface for the active component to prevent sintering, but also optimizes the adsorption and activation path of N2O and alleviates the poisoning effect of nitrogen-containing intermediate species or impurities in the exhaust on the Co active center during the reaction.

This application discloses a static electricity neutralization method and apparatus based on PECVD, belonging to the field of semiconductor thin film deposition technology. It includes: applying a first radio frequency (RF) to a reaction chamber to ionize a continuously introduced reactive gas into the chamber, forming plasma which is then deposited onto the wafer surface; after stopping the introduction of the reactive gas and the application of the first RF, applying a second RF in the chamber, wherein the power of the second RF is lower than that of the first RF, and the voltage polarity of the second RF is opposite to that of the first RF; moving a heater base on which the wafer is placed downwards to increase the gap between the wafer and the heater base, thereby facilitating the neutralization of static electricity between the wafer and the heater base by the second RF; and after stopping the application of the second RF, introducing a purge gas into the chamber to clean the wafer surface. This application neutralizes static electricity through low-power plasma discharge, avoiding the problems of wafer breakage and adhesion caused by electrostatic forces between the wafer and the heater base.

The application provides a polymethyl methacrylate product and a preparation method thereof. The preparation method of the polymethyl methacrylate product comprises the following steps: S1. mixing a resin matrix, a toughening agent, an antioxidant and a light stabilizer to obtain a mixture; the resin matrix comprises a polymethyl methacrylate resin; the toughening agent comprises a core-shell structure toughening agent and a polyester-based toughening agent; the core-shell structure toughening agent comprises a core and a shell layer; the core comprises polybutyl acrylate, and the shell layer comprises polymethyl methacrylate; S2. melt blending, extruding and granulating the mixture, and drying, injection molding, cooling and annealing. In the application, the core-shell structure toughening agent and the polyester-based toughening agent can synergistically improve the toughening effect.

The invention discloses a cleaning method for a semiconductor photoetching mask substrate, and belongs to the technical field of semiconductor manufacturing. According to the method, dynamic cleaning logic of step cooperation and energy matching is adopted, and the steps of interface wetting and pre-cleaning, chemical soft interface construction, low-damage mechanical stripping and synchronous washing, targeted reaction clearing, microstructure deep cleaning, interface dehydration and modification and final energy-assisted drying are sequentially executed. The method is characterized in that through the dependency relationship of chemical interface softening and low-damage mechanical stripping in sequence, the rotation speed of a substrate in each step is strictly controlled to meet the specific dynamic relationship (V2 < V1 < V4 < V3 < V5 < V6), and precise cooperation of chemical action, physical stripping and energy field cleaning is achieved. The contradiction between efficiency and substrate damage in a traditional cleaning process is effectively solved, full-scale pollutants from micron-scale particles to nano-scale molecular contamination can be removed without dead corners, and a clean, stable and secondary pollution resistant surface state is actively reconstructed at a cleaning end point; and the cleanliness and the service life of the mask substrate and the yield of a downstream photoetching process are remarkably improved.

The application relates to a preparation method of an entropy-based oxide catalyst with high metallic property and application of the entropy-based oxide catalyst in hydrogen production by acidic electrolytic water, and belongs to the field of catalysis. A water-soluble salt containing at least Ru, Ir and A is uniformly mixed, hydrolyzed and reduced under water bath stirring condition by taking zinc oxide as a carrier and a sodium borohydride solution as a reducing agent, then the black powder of the medium-entropy alloy is formed through filtration, washing and drying, and finally the black powder is subjected to rapid incomplete oxidation under the condition of 300-500 DEG C and air atmosphere, and then is subjected to acid pickling, filtration, washing and drying to prepare the entropy-based oxide catalyst with high metallic property. The catalyst contains a large amount of Ir-Ir metal bonds and / or Ir-Ru metal bonds, and the proportion can reach 30%-40%. The mismatch between the metal atom fingerprint structure and the metal-oxygen atom coordination structure causes serious lattice distortion, induces unbalanced distribution of stress and strain, and promotes the kinetics of the acidic oxygen evolution reaction.

This invention relates to the field of adsorption separation technology, specifically to an adsorbent for selectively adsorbing organic esters from industrial wastewater and its preparation method. The adsorbent contains polar functional groups capable of adsorbing organic esters and does not contain hydroxyl or carboxyl groups; the adsorbent's adsorption capacity for organic esters is not less than 12% of its total weight, and the density of the adsorbent is 0.5-1.2 g·cm³. ‑3 The adsorbent of this invention contains abundant polar functional groups, exhibiting strong selectivity for organic esters. This effectively avoids competitive adsorption of other molecules in the solution at the active sites, thus improving the purity of the recovered product. Under high liquid hourly space velocity (HLH), the adsorbent of this invention can purify the concentration of organic esters in the solution to below 1000 ppm.

This invention discloses an anti-aging power metering box cabinet material, relating to the field of organic materials technology. The anti-aging power metering box cabinet material comprises the following raw materials by weight percentage: 25%-35% unsaturated polyester resin, 11%-15% low-shrinkage agent, 0.5%-2% initiator, 2.5-8% additives, 35%-50% organic composite filler, and 15%-25% modified chopped glass fiber. This application adds the prepared modified chopped glass fiber to the unsaturated polyester resin, along with the remaining additives required for preparing the electrical cabinet material, to obtain the cabinet material for use in power metering boxes. The power metering box cabinet material prepared in this application has advantages such as excellent mechanical properties, stable environmental aging resistance, low dielectric loss, and low dielectric constant.

The utility model discloses a kind of anti-blocking coal drop pipes, belong to coal drop pipe structure technical field, including coal drop pipe ontology, connecting frame, breathing mechanism and drive mechanism;Several connecting holes for fixing breathing mechanism are staggered and arranged on coal drop pipe ontology, connecting frame is fixed on connecting hole;Breathing mechanism includes pressing ring, adapter frame, sealing membrane, sealing cover and expansion rubber plate, the outside of adapter frame and connecting frame is connected, pressing ring is fixed between adapter frame and connecting frame, sealing membrane is compressed between the outer wall of pressing ring and coal drop pipe ontology, sealing cover is fixed to the outside of pressing ring, breathing cavity is formed between sealing cover and sealing membrane, sealing membrane is made of elastic material, expansion rubber plate is set inside coal drop pipe ontology and edge connection connecting hole;Breathing mechanism and connecting hole are connected;Drive mechanism connects breathing cavity.The utility model makes coal powder fall off by breathing cavity and expansion rubber plate cooperation, realizes coal drop by similar peristalsis mode, prolongs the life of coal drop pipe.

The present application relates to the technical field of lithium battery current collector, in particular to a novel extremely thin copper foil and a preparation method thereof, which adopts a mixed copper foil layer, realizes atomic level deposition through pulse electron beam sputtering, can quickly diffuse to form a dense film, and can control the molar ratio of amorphous copper and nanocrystalline copper of the mixed copper foil layer to be 6-6.5:3.5-4, and the thickness of the mixed copper foil layer is 1.8-2.5 μm. The amorphous copper has high strength due to no grain boundary defects, the nanocrystalline copper improves the strength through grain boundary strengthening effect and meanwhile retains certain ductility, realizes the balance of strength and plasticity, makes the elongation rate reach 8%-12% and the tensile strength reach 290-320 MPa, is superior to the traditional 6 μm copper foil, the thickness is reduced by 60%-70%, the copper consumption is significantly reduced, the copper material cost is reduced, the battery volume energy density can be increased by about 3%-5% per 1 μm reduction of the copper foil thickness. The thickness of 1.8-2.5 μm can make the energy density increase by 12%-18%, and meet the high endurance requirement.

This invention relates to the field of medical blood purification equipment technology, and discloses a lipid adsorption material regeneration device, including a main body, a rotary switching module, an adsorption column module, a dynamic pressure balancing system, a fluid pipeline system, and a main controller. The rotary switching module drives the adsorption column module to switch between three stations: treatment, regeneration, and balancing preparation. The adsorption column module is filled with pH-responsive hydrogel material to achieve adsorption and regeneration functions. The dynamic pressure balancing system forms a magnetic circuit through a magnetic piston and electromagnetic drive components in a bypass pipe, which senses and adjusts the pressure inside the column in real time. The fluid pipeline system controls the connection of input and output connectors via an electric push rod to achieve fluid switching. The main controller integrates data from multiple sensors, including pressure, pH, and optical sensors, to intelligently terminate the regeneration process. This invention achieves in-situ online regeneration of the adsorption material, continuous uninterrupted treatment, and precise closed-loop control, improving treatment efficiency and safety, and significantly reducing consumable costs.

This invention relates to a degumming composition, its preparation method, and the degumming method thereof. The degumming composition comprises the following components in weight percentages: 84%–93.5% degumming solvent, 3%–5% solvent oil, 0.5%–3% solid wax, 1%–3% organobentonite, and 2%–5% polar activator; wherein the degumming solvent includes one or more of dichloromethane, N-methylpyrrolidone, and ethylene glycol monobutyl ether. This invention combines the degumming solvent, solid wax, solvent oil, organobentonite, and polar activator in a specific ratio, achieving synergistic effects among the components to obtain a degumming composition with slow evaporation and short degumming time.

Provided herein are improved rAAV (e.g., rAAV2, rAAVrh8R, etc.) for enhanced gene therapy of ocular disorders or CNS disorders wherein the rAAV comprise one or more substitutions of amino acids that interact with heparan sulfate proteoglycan. The invention provides methods for improved transduction of retinal cells and methods for treating ocular diseases with improved compositions of rAAV particles. Further provided herein are improved recombinant adeno-associated virus (rAAV) (e.g., rAAV2, rAAVrh8R, etc.) for enhanced gene therapy of disorders of the CNS. The invention provides methods for delivering the rAAV to the CNS, methods for treating disorders of the CNS with improved compositions of rAAV particles, and kits for delivering the rAAV to the CNS and / or treating a CNS disorder.

The application relates to the sewage treatment technical field, and particularly discloses a sludge discharging device for sewage treatment, which comprises a box body, a stirring tank is arranged at the upper end of the box body, a water outlet pipe is arranged on the side wall of the box body, a stirring assembly is arranged in the stirring tank, and a separation mechanism is arranged in the box body; sewage is added into the stirring tank; the stirring assembly in the application can strip the sludge wrapped on the surface of the stone, thereby reducing the separation difficulty of the subsequent sludge and the stone, improving the separation effect of the sludge and the stone, the stirred sewage enters into the box body, the separation mechanism can separate the sludge and the stone and respectively output to the outside of the box body, thereby realizing the separation of the sludge and the stone in the sewage, improving the resource recovery efficiency, reducing the disposal cost, and the water outlet pipe can discharge the upper layer water in the bottom of the box body after the separation.

The application provides a door lock mechanism and a dishwasher adopting the same. The door lock mechanism comprises an execution mechanism and a trigger mechanism cooperating with the execution mechanism. The execution mechanism comprises a small load mechanism, a large load mechanism, a locking body and a switching device. The trigger mechanism comprises a driving mechanism, a push rod and a latch. The driving mechanism is connected to the push rod and can drive the push rod to move. The front end of the push rod is provided with the latch which cooperates with the locking body. The small load mechanism and the large load mechanism act on the locking body to provide the locking force of the latch. The switching device changes the acting mode of the small load mechanism and the large load mechanism on the locking body to realize the size switching of the locking force of the latch. The small load mechanism and the large load mechanism act on the locking body through the switching device, the opening and closing doors and the locking state have different load forces, the operation feeling is optimized, the fingers and other parts of the operator are prevented from being clamped when the door is automatically closed, the operator is protected, and the safety hazard is eliminated.

An electric toilet seat with a water tank assembly, comprising a base, a casing, a water tank assembly and a circuit board arranged in an installation cavity formed by the base and the casing, the water tank assembly comprising a water tank with a water inlet and a water outlet and an electric heating tube extending into a water storage cavity of the water tank, characterized in that the water tank assembly further comprises an electrode device arranged in the water storage cavity of the water tank and a metal potential detection piece, the electrode device comprising an electrode rod and a metal potential reference piece, the circuit board being provided with a voltage output module connected with the electrode rod and a potential detection module connected with the potential detection piece, and the potential reference piece being electrically connected with a GND port of the circuit board through a wire. The electric toilet seat with the water tank assembly can reduce the generation of scale and improve the stability and safety of the electric toilet seat through the above design.

The application provides a Bst DNA polymerase domain, a mutant and application thereof, and belongs to the technical field of molecular biology. The amino acid sequence of the Bst DNA polymerase domain is shown in SEQ ID NO:1. The Bst DNA polymerase mutant is obtained by replacing the natural DNA binding domain of the wild-type Bst DNA polymerase with the amino acid sequence shown in SEQ ID NO:1. The Bst DNA polymerase mutant exhibits extremely high catalytic efficiency on dUTP, and also has excellent hot-start characteristics, and can reduce the false positive rate of LAMP technology to close to zero. The Bst DNA polymerase mutant also has extremely strong complex sample tolerance, and the detection sensitivity of the pathogen is 20 times higher than that of the wild-type Bst enzyme, and can meet the early and accurate diagnosis requirements of trace infection.

The present invention relates to methods of enhancing adoptive cell transfer immunotherapy by administering a protein having IgG cysteine protease or IgG endoglycosidase activity.

This disclosure provides a mass transfer method for light-emitting diodes (LEDs), an LED device, and a display panel, belonging to the field of optoelectronic manufacturing technology. The mass transfer method includes: preparing a first temporary substrate, the first temporary substrate including a first substrate and a plurality of pixel chips spaced apart on the first substrate, wherein the surface of the pixel chips away from the first substrate has residual structures protruding from the surface of the pixel chips away from the first substrate; etching each pixel chip using oxygen plasma; attaching an adhesive film to the surface of the pixel chips away from the first substrate to allow the residual structures to adhere to the adhesive film; and removing the adhesive film to detach the residual structures from the pixel chips. This disclosure can improve the problem of residual debris falling into the chip channels and improve the transfer accuracy of the pixel chips.