16results about How to "Control distribution" patented technology

This invention discloses a method for preparing in-situ grafted and dispersed nano-silica, relating to the field of nanomaterial preparation technology, comprising the following steps: Step ①, mixing sodium-free silica sol solution, water, and polyol in a high-pressure reactor; Step ②, gradually raising the reactor temperature from room temperature to 150-180℃, initially introducing acid anhydride gas or liquid at a certain flow rate, and maintaining temperature, constant pressure, and rotation speed until the pH value reaches 4.0-5.0±0.5, obtaining a primary mixture of hydrated nano-silica; Step ③, pumping an organosilicon coupling agent into the high-pressure reactor using a high-pressure metering pump, maintaining temperature and pressure, stirring the reaction for 30-90 minutes, then cooling, depressurizing, purging with nitrogen, and separating the reaction liquid to obtain grafted and dispersed nano-silica. This application aims to achieve readily available and inexpensive raw materials, reduce the difficulty of preparing nano-silica; solve the problems of dispersibility and compatibility with organic matter in nano-silica; simplify the procedure and improve preparation efficiency.

This invention discloses near-infrared II nanoparticles, their preparation method, and applications, belonging to the field of biomedical technology. The nanoparticles include a polymer shell and a near-infrared II fluorescent molecular core; the polymer shell comprises distearate phosphatidylethanolamine-polyethylene glycol. This invention achieves the batch preparation and performance optimization of near-infrared II nanoparticles through microfluidic technology. By adjusting the ratio and flow rate, the particle size and distribution can be effectively controlled. Furthermore, this invention enables precise temporal and spatial synergy between "drug" and "light," ultimately achieving complete eradication of lung infection lesions / tumors while maximizing the protection of surrounding normal tissues, thus improving treatment safety.

The utility model relates to a microalgae culture device for ecological restoration, which comprises a culture tank, an annular first cover plate mounted at the top of the culture tank through a flange, an annular second cover plate detachably mounted on the inner wall of the first cover plate, a third cover plate detachably mounted on the inner wall of the second cover plate, and a liquid distribution plate inserted into the upper part of the inner wall of the culture tank, a liquid inlet in the liquid distribution plate penetrates out of the side wall of the culture tank, a microalgae inlet located below the liquid distribution plate is formed in the side wall of the culture tank, a temperature equalizing cover is arranged on the inner wall of one side of the culture tank, a heating resistance wire is arranged in the temperature equalizing cover, air inlet pipes are arranged on the two sides of the top of the second cover plate in an up-down sealing and sliding mode, and the bottoms of the air inlet pipes are connected with aeration coil pipes; a lifting mechanism for driving the air inlet pipe to lift is arranged on the outer side of the culture tank, and illuminating lamps are vertically and hermetically arranged on two sides of the top of the third cover plate in a sliding manner. The illumination lamp and the aeration coil pipe are convenient to disassemble, assemble and clean, the height of the aeration pipe is adjustable, and the microalgae culture effect is good.

This invention relates to the field of preparation method technology and discloses a method for preparing a low-density nylon foam material. The method includes selecting nylon resin as the matrix material, wherein the nylon resin is a blend of PA6 and amorphous nylon PA610 in a specific ratio, wherein the mass ratio of PA6 to PA610 is 60:40 to 80:20, and the melt strength of the nylon resin is greater than or equal to 18 Pa·s; introducing a composite foaming agent, wherein the composite foaming agent is a combination of a chemical foaming agent and a physical foaming agent; and adding a nucleating agent, wherein the nucleating agent is nano-sized silica, nano-clay, talc, or a combination thereof, wherein the mass content of nano-silica is 0.5% to 2.0%. This invention can maintain stable dimensions and mechanical properties in humid environments and has a uniform and stable cell structure.

The application belongs to the technical field of catalyst material preparation, and provides a single-atom porous material catalyst, a preparation method thereof and application of the single-atom porous material catalyst in a methane aerobic conversion reaction. The application introduces reaction gas containing a gaseous metal precursor, a carbon source and a nitrogen source into a plasma reaction chamber, and uses plasma for chemical vapor deposition to obtain the single-atom porous material catalyst. The preparation method provided by the application can select gaseous, liquid or solid raw materials as a source of the gaseous metal precursor. The application can prepare various types of single-atom porous material catalysts, and enriches the application range of the single-atom porous material catalysts. The application realizes control of the particle size, morphology and distribution of the single-atom porous material catalyst by adjusting reaction parameters, and the prepared single-atom porous material catalyst can be used in the methane aerobic conversion reaction. Therefore, the preparation method provided by the application is simple in operation, strong in universality and has a good industrial application prospect.

This invention relates to a novel one-step titanium alloy wire drawing process using rollers. This process replaces the traditional stretching method with multi-angle composite roller rolling, processing the wire in a circular-elliptical-circular pattern. By rationally allocating the elongation coefficient and the horizontal angle between the rollers for each pass, continuous one-step forming of the titanium alloy wire is achieved. This process is carried out at room temperature, requiring no auxiliary lubricants or intermediate heat treatment. Only one annealing after wire forming is needed to obtain a bright wire. The final finished wire exhibits excellent mechanical properties and high dimensional accuracy, significantly simplifying the titanium alloy wire manufacturing process, reducing production costs, and making it suitable for large-scale industrial production.

The application belongs to the technical field of sodium ion batteries, and discloses a preparation method of a double-site co-doped sodium ion battery positive electrode material. The method comprises the following steps: (1) according to the molar ratio of each metal element in the chemical formula of the target product, corresponding metal salts are weighed and dissolved in an ethanol solution to obtain a metal salt solution; oxalic acid is dissolved in an ethanol solution to obtain an oxalic acid solution; (2) under ultrasonic conditions, the metal salt solution is added dropwise into the oxalic acid solution, and stirring is continuously performed; after the metal salt solution is completely added dropwise, ultrasonic treatment is continuously performed; the suspension treated by ultrasonic treatment is placed in an oven for drying, and the powder obtained by drying is ground; (3) the ground powder is placed in a corundum box and then placed in a tube furnace for sintering; first, heating is performed to 500 DEG C for heat preservation; after cooling, the tablet is taken out, the pressed tablet is continuously placed in the tube furnace, heating is performed to 900 DEG C for heat preservation, after cooling, the tablet is taken out and ground, and the target product is obtained.

The utility model relates to packaging box processing equipment. The packaging box processing equipment comprises a conveying device, a drying box is fixedly connected to the conveying device; the side surface of the drying box is fixedly connected with a group of diverters; the group of flow dividers are symmetrically arranged; one side of the flow divider is fixedly connected with a heating pipe; an air heater is mounted on one side of the heating pipe; a plurality of air outlets are formed in one side of the drying box; a group of notches are formed in the side surface of the conveying device; the notches and the heating pipes are correspondingly arranged; a plurality of blades are rotationally connected to the middle part of the notch; hot air is sprayed out from the multiple air outlets through the air heater, the drying range can be enlarged, the drying efficiency is improved, the drying time of the packaging box is shortened, the direction of the hot air sprayed out from the air outlets can be adjusted by rotating the blades, and therefore the hot air is blown to a designated area, and the drying efficiency can be improved according to the specific shape of the packaging box and the position needing to be dried. The distribution of hot air is controlled, the drying uniformity is improved, and the situation of local overheating or insufficient drying is reduced.

This invention relates to the field of 3D printing technology, and discloses a fiber-reinforced composite material 3D printer and printing method. The method utilizes an interlayer pressing device to heat / cool the currently deposited filament bundle under a preset interlayer pressing force, promoting interlayer fusion and improving interlayer bonding strength. It also eliminates the thermal history during filament cooling, controls the crystallization behavior, grain size, and distribution of the polymer in the printed filament, and improves the microscopic uniformity of the printed composite material. The inter-pass pressing device hot-presses and shapes the sides and top surfaces of the currently deposited filament bundle, while simultaneously performing secondary hot-pressing on the adjacent printed layer's deposited filament bundles. This allows the resin in the currently deposited filament bundle and the adjacent printed layer's deposited filament bundles to melt and flow, filling the inter-pass gaps between adjacent printed layers and improving inter-pass bonding strength.

This application discloses a method for controlling the use of water-blocking agents in wells of bottom-water reservoirs. The method includes: obtaining the reservoir properties and fluid seepage mechanism of the bottom-water reservoir, wherein the reservoir properties include at least formation porosity; establishing a mathematical model for the dosage of water-blocking agents based on the reservoir properties and the fluid seepage mechanism, and determining the total dosage of water-blocking agents for the wells of the bottom-water reservoir based on the mathematical model; determining the dosage of multiple water-blocking agent slugs based on the total dosage of water-blocking agents, and obtaining the concentration of water-blocking agents in the multiple water-blocking agent slugs, wherein the sum of the dosages of water-blocking agents in the multiple water-blocking agent slugs is equal to the total dosage of water-blocking agents. The technical solution provided by this application can improve the water-blocking effect of wells in bottom-water reservoirs.

The present application relates to the technical field of enveloped vibrating screen, and particularly relates to an enveloped vibrating screen for titanium dioxide and a screening method thereof, which comprises a fixed base, supporting springs, a protective shell, a re-screening mechanism, a driving motor, a vibrating screen machine, a bottom outlet and a vibrating screen assembly; the supporting springs are installed at four corners of the fixed base, the protective shell is installed above the supporting springs, the re-screening mechanism is installed on the side of the protective shell, the re-screening mechanism is used for re-screening the material after the initial screening under the driving of the driving motor, the driving motor is installed above the re-screening mechanism, the vibrating screen machine is installed on both sides of the protective shell, the bottom outlet is arranged below the protective shell, and the vibrating screen assembly is installed inside the protective shell, the vibrating screen assembly is used for initially screening the mixed material and outputting small-particle material downwards.

The present invention provides a substrate support assembly, a showerhead assembly, and a substrate processing apparatus including the same, which can precisely control plasma distribution in an edge region of a processing space. The substrate support assembly for supporting a substrate in a substrate processing apparatus using plasma according to the present invention comprises: a ceramic support plate for supporting the substrate; the base plate is made of a metal material and is positioned below the supporting plate; the focusing ring is made of a metal material and is positioned on the outer side of the supporting plate; and the outer side ring is positioned on the outer side of the focusing ring. The outer ring is made of a quartz material in which carbon is mixed.

The invention belongs to the technical field of functional membrane materials, and particularly relates to a synthesis process of a nano environment-friendly functional membrane material. By adopting a composite emulsifier system with a specific ratio, the particle size and distribution in the emulsion polymerization process are effectively controlled by the generated synergistic stabilization effect, the polymer emulsion with uniform particle size and high stability is obtained, and nano silicon dioxide is uniformly dispersed in a polymer matrix after being subjected to dual modification by dopamine and a silane coupling agent, so that the nano silicon dioxide can be dispersed in the polymer matrix. The mechanical property and the thermal stability of the material are effectively enhanced. Through low-temperature initiation and staged heating crosslinking, a polymer network is formed more uniformly and compactly, so that the water resistance and barrier property of the material are remarkably improved. According to the invention, recovery of organic matters in wastewater and cyclic utilization of water are realized through a ceramic membrane separation and reverse osmosis combined process. According to the overall scheme, the comprehensive performance of the membrane material is improved, meanwhile, process feasibility and environment friendliness are considered, and the method is suitable for large-scale production of the high-performance environment-friendly membrane material.

The application discloses a manufacturing process for improving the solder mask bridge falling problem of a high-layer circuit board based on an AI server, relates to the field of PCB manufacturing technologies, and comprises a pretreatment process, a silk-screen printing process, a pre-baking process, an exposure process, a developing process and a high-temperature curing process. The pretreatment process adopts volcano ash plate grinding and super-rough cleaning. The silk-screen printing process adopts secondary printing of oil, and the first solder mask bridge position is blocked from oil. The exposure process reduces the gap between the solder mask bridge and the design PAD and etching PAD. The developing process maintains the pH value of developing liquid at a constant value by calculating the ink usage of a single PCB and adopting the drag tank method or the production green oil plate method, so that the problems of the prior art, such as the easy falling of the solder mask bridge and the high defect rate, are solved.

This invention provides a high-yield-strength Grade E steel plate capable of withstanding welding with a high heat input of 100 kJ / cm, and its preparation method, belonging to the technical field of steel plates for high heat input welding. By optimizing alloying elements and controlling the chemical composition of the steel plate to satisfy the corresponding formula, this invention can control the size and distribution of second-phase particles in the steel, resulting in a sufficient number of nano-sized particles that can inhibit austenite grain growth and micron-sized particles that can nucleate within the grains. This combination of controlling austenite grain size and intragranular microstructure improves the steel plate's resistance to high heat input welding. Experimental results show that the Grade E steel plate provided by this invention has a yield strength of not less than 370 MPa, a tensile strength of not less than 446 MPa, an elongation of not less than 19%, a longitudinal impact KV2 of not less than 262 J at -40℃, and a KV2 of not less than 124 J in the near-weld heat-affected zone at -40℃ with a heat input of 100 kJ / cm.

This invention belongs to the field of reactor technology and discloses an olefin polymerization reactor with a discharge port at the bottom. It includes: a stirring device, a gas distribution device, a feeding system, an internal cooling system for heat removal, and an external circulation system for heat removal located outside the reactor. The stirring device extends into the reactor. The feeding system consists of a feed pipe installed from the top to the bottom of the reactor. The gas distribution device consists of an inlet pipe installed from the top to the bottom of the reactor. The internal cooling system is located around the gas distribution device. The external circulation system is a jacket located outside the reactor. The feed pipe and the inlet pipe are detachable. This invention effectively solves the problem of material agglomeration and reduced reaction rate caused by the inability to quickly remove heat during the reaction due to exothermic reactions. It enhances heat exchange, improves reaction efficiency, stabilizes production, and significantly reduces maintenance costs.