1750 results about "Micro nano" patented technology

The disclosure discloses a chip cooling platform based on micro-nano structure, including a platform body, a cooling pipeline and an outer heat dissipation device, where the cooling pipeline is in a closed-loop structure, and part of the cooling pipeline is arranged in the platform body; the cooling pipeline is filled with cooling medium, and an inner wall of the cooling pipeline located in the platform body is provided with a turbulence structure; and a unidirectional hydraulic pump I is installed on the cooling pipeline arranged outside the platform body; the outer heat dissipation device is used for radiating the cooling medium in the cooling pipeline.

The invention provides a mineralization grouting method for reinforcing sequestration of carbon dioxide, and belongs to the technical field of underground goaf grouting filling, the working process comprises the steps that supercritical CO2, micro-nano filler and calcium-containing solid waste are jointly mixed and mixed into slurry, the slurry is injected into a goaf, part of CO2 is turned into a gaseous state to escape in the state of being lower than the supercritical pressure of CO2, and then the CO2 is discharged; bubble cores are formed on the surface of the micro-nano filler, and uniformly distributed micropores are formed in a stone body after the slurry is solidified. Due to the fact that the micropores can seal gaseous CO2, the carbon sequestration amount of the slurry per cubic meter can reach 150-350 kg, and the carbon sequestration capacity of the slurry is higher than the carbon sequestration capacity of a common grouting material. The technological method is easy to operate, supercritical CO2 reacts with the slurry, a large amount of CO2 in the shallow goaf is stored, the solid waste material is used for grouting, meanwhile, the carbon sequestration amount of the slurry is increased, and the grouting cost is saved.

The invention relates to an aluminum-based composite material, in particular to a preparation method of an in-situ micro-nano Al2O3 particle reinforced aluminum-based composite material. The preparation method comprises the following steps: carrying out ball-milling pre-dispersion on silica powder, calcined kaolin and aluminum powder according to a specified ratio, stirring an Al-Si alloy melt at a semi-solid temperature, adding ball-milling mixed powder, heating to a temperature above an Al-Si alloy liquidus, dispersing reactant powder by using a blade-tray integrated stirring device, heating, carrying out heat preservation, carrying out heat preservation, and carrying out vacuum drying to obtain the aluminum-silicon alloy. And reacting to generate in-situ micro-nano Al2O3 particles, cooling, supplementing alloy elements, refining, and pouring to obtain the in-situ micro-nano Al2O3 particle reinforced composite material. According to the blade-tray integrated stirring device, mechanical stirring and the rolling and impacting effects of the ceramic balls are combined, the problem of one-time dispersion of micro-nano reactant powder is effectively solved, meanwhile, passivation of edges and corners of micron particles is achieved, and the comprehensive performance of in-situ particle reinforced aluminum matrix composites is improved.

The present invention relates to an in-situ micro-nano impact indentation testing instrument, falling within the technical field of material micromechanical testing. The instrument comprises a nitrogen generation module, an environmental chamber, a high / low temperature loading module, an “optical-infrared” in-situ monitoring module, an “electromagnetic-piezoelectric” coupling impact module, etc. After the nitrogen is introduced into the environmental chamber and the test area is determined by microscopic imaging, the “electromagnetic-piezoelectric” coupling impact module can drive an indenter to indent a specimen. An acoustic emission sensor embedded in the high / low temperature loading module can monitor the surface crack propagation of the specimen. The “optical-infrared” in-situ monitoring module can perform real-time high-speed optical imaging and infrared imaging on the impact indentation process. The present invention can perform micro-nano impact indentation testing on the material at high or low temperatures.

The invention discloses an aerobic granular sludge culture method based on a micro-nano aeration technology, and belongs to the technical field of water treatment. According to the invention, micro-nano aeration is used, so that the oxygen transfer rate in the aerobic granular sludge reactor is 2.1 times of that of a conventional aeration group, the generated hydroxyl radicals are 2.6 times of that of the conventional aeration group, the final removal efficiencies of ammonia nitrogen, total nitrogen and COD (Chemical Oxygen Demand) can respectively reach 98%, 85% and 97%, the denitrification performance is excellent, the treatment period is shortened by 1 hour, and the treatment cost is reduced. After the aeration time is shortened, 28% of aeration energy consumption is saved. Micro-nano aeration not only is beneficial to culture and domestication of aerobic granular sludge and promotes removal of pollutants, but also improves the energy utilization efficiency.

The invention belongs to the technical field of micro-nano processing, and particularly relates to a preparation method and application of a metal micro-nano tube array. Comprising the following steps: preparing a metal layer on the surface of a substrate; coining glue is sprayed on the surface of the metal layer, then coining is conducted through a template, and a micro glue column array is formed after curing; a plasma etching process is adopted, the micro glue column array is used as a mask, the metal layer exposed out of the gaps in the bottom of the micro glue column array is etched, and a structure with the micro glue columns wrapped by metal is formed; and removing the rubber columns in the structure of the metal-coated micro rubber columns to obtain the metal micro-nano tube array. According to the invention, a residual-layer-free imprinting technology is adopted, the problem of glue layer residue in traditional imprinting is avoided, and the etching uniformity is improved. A plasma dynamic balance process is adopted, the side wall redeposition effect of etching by-products is utilized, and the metal micro-nano tubes are formed in a self-assembly mode. The prepared metal micro-nano tube array has high aspect ratio compatibility, and the nano tube array with the aspect ratio as high as 10: 1 can be realized.

The invention relates to the technical field of refrigeration material preparation, in particular to an efficient passive radiation refrigeration material suitable for a sub-super environment and a preparation method and application of the efficient passive radiation refrigeration material. The method comprises the following steps: uniformly mixing thermoplastic polyurethane, sunlight high-reflection inorganic particles and a phase change material in a solvent; after a chemical foaming agent is added, the obtained suspension liquid is heated and foamed in a confinement mold, and wet gel is formed; and finally, carrying out freeze drying treatment to obtain the composite porous aerogel. The prepared material has a micro-nano porous skeleton formed by TPU, and inorganic particles and PCM are uniformly dispersed in the skeleton wall. Through component cooperation and a special porous structure, the material has extremely high sunlight reflectivity and mid-infrared emissivity, self-adaptive temperature regulation and control are achieved through PCM phase change, the problem that refrigeration of a traditional material fails in the sub-environment such as the vertical surface is effectively solved, and efficient sub-super-environment heat management is achieved.

The invention discloses a system for mineralizing carbon dioxide by micro-nano bubble reinforced base solid waste and an application method.The system for mineralizing carbon dioxide by micro-nano bubble reinforced base solid waste comprises a micro-nano bubble generation and injection unit, a mineralization reaction unit and a circulating water treatment unit, the micro-nano bubble generation and injection unit comprises a micro-nano bubble generation device, a gas supply pipeline and a water supply pipeline, the mineralization reaction unit comprises a mineralization reactor, and a quartz sand filling layer and a nylon screen are arranged at the bottom of the mineralization reactor. Through the multi-unit integrated coupling design, the micro-nano bubbles are creatively utilized to strengthen the gas-liquid-solid three-phase synergistic reaction process, the column type filling structure and the sectional type reaction mechanism are combined, the carbon dioxide mass transfer efficiency and the mineralization reaction rate are effectively improved, and the system has the advantages of being high in system adaptability, stable in continuous operation, flexible in module deployment and the like; the method is suitable for efficient treatment of alkaline solid waste and carbon dioxide sequestration collaborative scenes, and has good engineering popularization prospects and resource utilization value.

The invention discloses a micro-nano air flotation coupling critical micro-flocculation phosphorus removal control method, which relates to the technical field of water treatment, and comprises the following steps: when the total phosphorus concentration is lower than a preset concentration threshold value, determining the proportion of non-target particles based on the water turbidity and particle spectrum distribution; adding a flocculating agent according to a preset critical dosage to generate target phosphorus floc, and synchronously forming a primary flocculation phase which can be distinguished from non-target particles; applying an interfacial activity regulation factor to the micro-nano bubbles based on the primary flocculation phase, and performing selective regulation; forming a bubble-phosphorus floc complex based on a selective regulation effect; the bubble-phosphorus floc complex is separated and removed in an air flotation mode, the competition intensity history of non-target particles is recorded, and a competition memory curve is formed. According to the method, interfacial activity regulation factors are applied to the surfaces of the micro-nano bubbles, so that the micro-nano bubbles can preferentially and selectively adsorb target phosphorus floc, and efficient removal of low-concentration total phosphorus is realized.

The invention discloses an MABR sewage treatment device and method based on an A + B composite membrane, and belongs to the technical field of river sewage treatment. The device comprises a composite membrane assembly, a membrane shell and a support frame, the composite membrane assembly is composed of multiple layers of bubble-free aeration membranes (A membranes) and a layer of micro-nano aeration membranes (B membranes), the bubble-free aeration membranes are distributed at intervals from top to bottom, and the micro-nano aeration membranes are arranged on the bottommost layer. Membrane shells are fixed on the two sides of the support frame; and each layer of membrane is communicated with the membrane shells on the two sides. Air enters from the top membrane shell and circulates from top to bottom in the multiple layers of membranes through left-right alternate flowing paths, and the contact area of the air and the membranes is increased. The bubble-free aeration membrane serves as a microbial carrier to degrade pollutants, and the micro-nano aeration membrane generates micro-nano bubbles for pressure relief, oxygenation and cleaning of residual substances on the surface of the bubble-free aeration membrane. Membrane pollution can be effectively relieved, the service life of the bubble-free aeration membrane is prolonged, membrane filaments are effectively prevented from being damaged due to too large pressure, and long-term stable operation of the system is guaranteed.

The invention discloses a super-hydrophobic road ice-inhibiting coating based on a photothermal effect and nano modified particles and a preparation method of the super-hydrophobic road ice-inhibiting coating. The preparation method comprises the following steps: introducing silane modified nano silicon dioxide (SiO2) and titanium dioxide (TiO2) particles into a polyaniline solution, and preparing the composite super-hydrophobic powder through a chemical oxidation polymerization method. The preparation method comprises the following steps: firstly, modifying the surfaces of SiO2 and TiO2 nanoparticles by adopting a silane coupling agent, and endowing the SiO2 and TiO2 nanoparticles with low surface energy and hydrophobic property; and then adding the modified nano-particles into an aniline monomer solution, reacting with doped acid and an oxidizing agent, so that polyaniline molecules are subjected to in-situ polymerization on the surfaces of the particles, and the composite super-hydrophobic powder with a micro-nano structure is formed. The obtained composite material has excellent photothermal conversion performance and super-hydrophobic performance at the same time, and the efficient photothermal material heat absorption ice melting effect and the synergistic ice restraining effect of the photothermal material and the super-hydrophobic material can be achieved. Compared with a traditional ice-inhibiting coating, the coating disclosed by the invention shows stronger ice-resisting capability in a low-temperature and high-humidity environment, has good durability, mechanical stability and environmental protection property, and is suitable for the field of ice prevention and ice inhibition in cold regions such as roads, bridges, airport runways and the like.

The invention relates to the technical field of carbon dioxide sequestration and shale gas development, and particularly discloses a shale micro-nano pore multiphase multicomponent competitive adsorption data determination method and device, and the method comprises the steps: obtaining a shale core sample of a target area, and determining the type and relative content change characteristics of surface functional groups of the shale core sample; key structures and force field parameters of shale clay minerals in a target block are collected, and a shale clay mineral molecular model is established; establishing a plurality of fluid molecular models; establishing slit models, and establishing a multiphase fluid system model between the slit models to obtain a stable configuration; applying an external electric field to the stable configuration, and performing molecular dynamics calculation to obtain molecular trajectory coordinates and dynamics information of the multi-phase multi-component fluid; and calculating competitive adsorption data of the shale micro-nano pore multi-phase multi-component fluid under the action of the electric field. According to the scheme, the occurrence state and the competitive adsorption behavior of the shale micro-nano pore multi-phase multi-component fluid under the action of the electric field can be disclosed from the molecular scale.

The invention relates to the technical field of bubble generation, and provides a micro-nano bubble stable generation method and a micro-nano bubble stable generation device.The method comprises the steps that a liquid-phase working medium flows through a Venturi tube, so that negative pressure is formed in the throat portion of the Venturi tube, a gas-phase working medium is sucked in, preliminary mixing is conducted, and a gas-liquid mixture is obtained; the gas-liquid mixture is tangentially guided into a rotary-cut type excitation cavity to drive a free rotating impeller in the rotary-cut type excitation cavity to rotate, and fine shearing is conducted on bubbles; the gas-liquid mixture obtained after fine shearing is guided into a diffusion and flow stabilization cavity for speed reduction and flow stabilization; the gas-liquid mixture subjected to flow stabilization flows through a nanocrystallization foam stabilizing unit, a plurality of parallel micro-channels are arranged in the nanocrystallization foam stabilizing unit, and the surface of the inner wall of each micro-channel is covered with a layer of nanofiber net-shaped structure; and carrying out final nanocrystallization and interface stabilization treatment on the gas-liquid mixture through a nanofiber net structure, and outputting stable micro-nano bubble liquid. The problems of poor stability, short service life and high energy consumption of the traditional technology are solved.

The invention discloses a method for preparing micro-nano magnesium hydride powder, which comprises the following steps: in a vacuum environment I, heating a magnesium raw material to form magnesium steam, and simultaneously introducing trace carrier gas I; in the vacuum environment II, magnesium steam is conveyed through the trace carrier gas I to be mixed with the carrier gas II to form mixed gas, meanwhile, the mixed gas is made to rapidly flow through the injection evacuator, the magnesium steam is cooled and hydrogenated, and the micro-nano magnesium hydride powder is formed. Compared with the prior art, the gasification efficiency of magnesium is higher, the magnesium is taken away by airflow, residues in an evaporation chamber are less, the utilization rate of the magnesium is high, produced magnesium powder is directly brought into the next link through hydrogen carrier gas, the processes of passivation, bin opening, powder taking and the like are omitted, magnesium powder conveying is more efficient and safer, and the production cost is reduced. Through the pre-hydrogenation of the magnesium powder and the shearing action of the carrier gas of the high-speed hydrogen, the generated magnesium powder particles are smaller, the magnesium hydride powder particles generated after hydrogenation are smaller, the activity is better, and the technical process is easier to realize large-scale amplification and automatic control.

The invention discloses a walnut skin powder micro-nano polishing system for an inner hole of a high borosilicate microsyringe, and relates to the technical field of polishing of inner holes of syringes. The device comprises a powder containing barrel, a spline pipe column-plugging disc multi-through-hole positioning assembly, a polishing rod synchronous rotating driving mechanism and an automatic feeding-discharging mechanism. By means of swing driving disc indexing feeding, vibration-centrifugal composite polishing, plugging column sealing and connecting rod-rack transmission discharging, one-time efficient, low-damage and environment-friendly polishing of the inner walls of the multiple injectors is achieved, the surface consistency, the machining takt and the powder recoverability are remarkably improved, and the device is suitable for batch precision manufacturing of disposable medical instruments.

The invention provides a carbon mineralization structure supercapacitor and a preparation method and application thereof. The supercapacitor with the carbon mineralization structure comprises an electrode, the electrode comprises a carbon mineralization gel material, a carbon conductive material and foam metal, and the carbon conductive material is distributed in a three-dimensional space formed after the carbon mineralization gel material is carbonized and wraps the foam metal together; the electrodes are arranged on the two sides of the solid electrolyte layer, and the preparation raw materials of the solid electrolyte layer comprise a carbon mineralization cementing material, bicarbonate, a fiber material, a porous micro-nano material, an air entraining agent and an inorganic salt aqueous solution, raw materials for preparing the solid electrolyte layer are mixed, pressed and carbonized to form the solid electrolyte layer. The carbon mineralization structure supercapacitor provided by the invention breaks through the bottlenecks of low strength and poor energy storage performance of a traditional cement-based capacitor, has excellent mechanical properties and electrical properties at the same time, and is low in cost and environment-friendly.

The utility model provides a micro-nano bubble generator. The micro-nano bubble generator comprises three units, the first unit is one or a group of premixing nozzles and is used for sucking gas, realizing atomization of liquid and gas and increasing the specific surface area; the second unit is a Venturi tube, after the second unit is communicated with the first unit, a throat tube of the second unit is a multi-layer multi-tube Venturi tube and is communicated with external gas through a gas guide tube, the gas passes through the gas guide tube and a gas chamber and is sucked into the multi-hole multi-tube in each layer and the middle along a gas path, and gas and liquid move relatively in the gas guide tube and the gas chamber, so that full mixing and fine crushing are realized; and the third unit is communicated with the second unit and is a group of mixers, the gas and the liquid are further mixed in the third unit, the generation of the micro-nano bubbles is optimized, the mixing time is prolonged, and the bubble breaking capability of the generator is improved. The utility model belongs to the field of chemical reaction equipment, further dissolution of bubbles and multiple times of fine crushing of the bubbles are realized through the arranged micro-nano bubble generator, the volume of the generated bubbles is smaller, and the micro-nano bubble generation efficiency is improved.

The air self-suction type resonance micro-nano bubble generating device comprises a pipeline body, a water inlet flow channel is formed in one end of the pipeline body, the end, provided with the water inlet flow channel, of the pipeline body communicates with an air inlet pipe, a speed adjusting motor is installed at the top of the pipeline body, and a rotating shaft is fixedly installed at the output end of the speed adjusting motor; a rotating impeller is fixedly mounted on the outer side of the rotating shaft; a cylinder body is fixedly mounted in the pipeline main body; the frequency and the amplitude are accurately regulated and controlled through the reciprocating motion of the first piston, so that the system achieves a mode of an efficient resonance state, micro-nano bubbles can be efficiently released, meanwhile, the equipment ingeniously adopts a self-suction air inlet mode, needed gas is automatically and continuously supplemented, and the energy consumption is reduced. According to the design, the defects of insufficient gas supplement, low efficiency and the like in a traditional micro-nano bubble generation mode are greatly overcome, the intake of gas is also remarkably improved, and sufficient raw materials are provided for generation of micro-nano bubbles.

The invention discloses a cleaning method and equipment for improving the cleanliness of a solid surface. The cleaning method comprises the steps that a cleaning medium containing a cleaning liquid and a gas mixture is injected into a cleaning tank, gas exists in the cleaning medium in the form of micro-nano bubbles, the concentration of the micro-nano bubbles is 106-1012 / L, and the pressure of the gas is 0.01-2.00 MPa; ultrasonic waves with the frequency range of 1 kHz to 1 MHz are applied into the cleaning tank through a multi-frequency ultrasonic wave generating device; and the cleaning medium is adjusted to circularly flow in the cleaning tank so as to clean the surface of the solid. According to the solid surface cleaning method combining the micro-nano bubbles and the ultrasonic technology, the cleaning efficiency and effect are remarkably improved by optimizing generation, distribution and stability of the bubbles and accurately controlling interaction between ultrasonic waves and the bubbles.

The invention relates to the field of water pollution abatement, in particular to an underwater micro-nano bubble generator and a using method thereof.The underwater micro-nano bubble generator comprises a bubble cutting pipe, a bubble cutting generating device is arranged in the middle of the bubble cutting pipe, and an erecting fixing plate is arranged at the front end of the bubble cutting pipe; a plurality of first venturi tubes are arranged on the erected fixing plate, each first venturi tube comprises a first liquid inlet section, a first compression section and a first expansion section, a water passing pipe is connected between the first expansion section and the bubble cutting tube, and an air inlet which is the same as the interior of the first venturi tube is fixedly formed in the first venturi tube; and a second Venturi tube is fixedly mounted at the rear end of the bubble cutting tube, so that the problems that a micro-nano bubble generator in the prior art is relatively high in cost, water and gas cannot be preliminarily mixed before bubble cutting, and the damage resistance is poor can be solved.

Methods of making optic structures (e.g., microring resonator, meta-elements) include imprinting a first surface of a moldable polymer having at least one inverse micro / nano-feature into a second surface of a first polymeric cladding layer disposed on a second substrate to form at least one trench micro / nano-feature contrapositive to the at least one inverse micro / nano-feature. A liquid polymeric precursor is applied into the at least one trench micro / nano-feature where it is solidified to form a solid polymer. A difference between a first refractive index of the first cladding layer and a second refractive index of the solid polymer is ≥about 0.05. The solid is heated for thermal reflow to define a meniscus followed by applying a second polymeric cladding layer thereon. Organic cladded (e.g., microring resonator) optic structures are also provided, which may have a quality (Q)-factor of ≥about 5×105 around 770 nm wavelength).

The invention discloses a self-template synthesized linear biochar-based bimetallic material as well as a preparation method and application thereof, and belongs to the technical field of carbon materials. The method comprises the following steps: pretreating ganoderma lucidum residues, and pyrolyzing in a nitrogen atmosphere to prepare charcoal; and mixing the prepared biochar with cobalt nitrate and sodium molybdate to prepare CoMoO4 nanoparticles with in-situ growth of the biochar, and then washing and drying to obtain the BC-coated CoMoO4 linear biochar-based bimetallic material. Heterojunctions formed by binding sites of cobalt-molybdenum bimetal and biochar in the material form more defect sites, the synergistic effect of the metal and the micro-nano fibrous biochar is exerted, the degradation rate in the application of catalytic degradation of bisphenol A can reach 98.18% or above, a multiple reaction mechanism with sulfate free radicals is jointly shown, and the photocatalytic degradation of bisphenol A is realized. And the method has higher adaptability and effectiveness for complex pollutants.

The invention discloses a preparation method for forming a micro-nano hydrophobic coating by dip-coating on the surface of a fabric, and relates to the technical field of hydrophobic modification of natural fiber fabrics. According to the first part of the product, the selected fabric is formed by weaving natural materials through pulping, spinning and other processes, the fabric hydrophobic coating is composed of two parts, the first part is that a hydrophobic solution and the fabric are selected to construct a microcosmic basic structure, the second part is that a hydrophobic layer is secondarily covered with a mixed solvent, and micro-nano solid particles are added; by utilizing the properties of a silane coupling agent and polydimethylsiloxane, the silane coupling agent and the polydimethylsiloxane are mixed according to a proportion, and the mixture is smeared on the surface of the fabric to construct a rough coating. The preparation method has the advantages that the hydrophobicity is good, and a modified product can still have a good hydrophobic effect after being soaked in water for a long time; the environment is protected, when landfill treatment is needed, the product can be degraded in the natural environment for two years, and when combustion treatment is needed, only carbon dioxide, water and other environment-friendly gases can be generated; water and soil loss is prevented, the hydrophobic effect can be kept in the soil for two years, and afforestation and desert greening are facilitated; the soil is fertile, and the product is rich in sodium ions after being soaked in sodium methyl silicate, so that the nutrient of the soil is increased, and the soil is kept in a fertile state.

The invention discloses a microwave-assisted green micro-nano platinum powder preparation method and application thereof. The method comprises the following steps: a) preparing a platinum ion solution; b) adding a dispersing agent and a surfactant; c) adding a reducing agent; d) microwave heating reaction; e) separating and purifying a product; and f) drying: drying the product at low temperature to obtain the micro-nano platinum powder. Through microwave field enhanced mass transfer and nucleation kinetics, compared with a traditional chemical reduction method, the reaction efficiency is improved by 80% or above, high-temperature and high-pressure conditions are not needed, and the process energy consumption is reduced by about 60%. The obtained platinum nano-powder is excellent in dispersity, the specific surface area reaches 20-50 m < 2 > / g, and the platinum nano-powder shows high activity in a proton exchange membrane fuel cell catalyst. The method is suitable for continuous production, and an efficient solution is provided for application of the high-performance platinum-based material in the fields of catalysis, new energy and electronic devices.

The present invention discloses a method for synergistically preparing a superhydrophobic membrane by spray-induced nonsolvent phase inversion and click chemistry. The method uses a polymer with a polyvinylidene fluoride as the main structure as a raw material, constructs a micro-nano hierarchical structure in bulk by the spray-induced nonsolvent phase inversion method, and covalently bonds a low surface energy substance to the membrane surface with the assistance of click chemistry technology to achieve the superhydrophobicity of the membrane. The superhydrophobic membrane of the present invention can resist the wetting of liquids with different surface tensions, has good anti-wetting and anti-inorganic fouling properties as well as excellent wastewater treatment capabilities, and can be applied to fields such as membrane distillation seawater desalination, deep treatment of shale gas wastewater and clean water regeneration, etc., broadening the types and application ranges of MD membrane materials.

The invention relates to the technical field of photoelectric composite cables, in particular to a cold-resistant tensile photoelectric composite cable and a rapid laying method thereof, and the cable comprises a conductor part, an insulating layer, an optical fiber unit, a filling layer and an outer sheath which are coaxially arranged from inside to outside and are sequentially wrapped. The conductor part is formed by twisting a plurality of strands of copper wires, a carbon fiber reinforced core is arranged in the conductor part, and the insulating layer is made of EAA and PEBA blending modified materials and contains nano boron nitride particles; the optical fiber unit is of a PBT loose tube structure, a plurality of single-mode optical fibers and special ointment are arranged in the PBT loose tube structure, micro-nano protrusions are arranged on the inner wall of a loose tube, and the surface of each micro-nano protrusion is covered with a silicon dioxide antireflection film. The cable integrates the functions of cold resistance, stretch resistance, electric conduction, insulation, communication, heat dissipation and protection. The insulating layer adopts EAA and PEBA blending modified materials to be combined with nano boron nitride particles, so that the cold resistance and the insulativity are improved; and the polyurethane elastomer of the filling layer is compounded with the glass beads, so that the structural stability and the comprehensive performance are enhanced.

The invention discloses an alternate aeration venturi tube type micro-nano bubble generation device, which comprises a venturi jet device, a double-feedback channel fluid oscillator is communicated with the throat part of the venturi jet device, the top of the double-feedback channel fluid oscillator is an air inlet, and the bottom of the double-feedback channel fluid oscillator is a first outlet and a second outlet; a first annular porous material ring and a second annular porous material ring are installed at the positions, corresponding to a first outlet and a second outlet of the double-feedback-channel fluid oscillator, of the throat portion of the Venturi jet device respectively, the first outlet is communicated with the first annular porous material ring, and the second outlet is communicated with the second annular porous material ring. A flexible film is arranged in a divergent section of the Venturi jet device, and a rotational flow impeller is installed in a convergent section of the Venturi jet device. Interval ventilation can be achieved through the double-feedback-channel fluid oscillator, the double-feedback-channel fluid oscillator is combined with the annular porous material ring, and bubble gathering is restrained; meanwhile, under the synergistic effect of rotational flow shearing and film dynamic breaking, micro-nano bubbles are generated.

The invention provides a micro-nano bubble-surfactant synergistic coal seam gas seepage displacement-dust fall method, which adopts a multi-stage gas and dust comprehensive prevention and control means, adopts a pressure pump and a pumping system in a liquid injection period, and controls the pressure and the pumping flow rate, so that the gas seepage displacement and dust fall of a coal seam are realized. A micro-nano bubble-surface active liquid coupling medium is adopted for conducting seepage displacement on coal seam gas, and it is ensured that the coal seam gas is efficiently discharged or extracted. After liquid injection is finished, the micro-nano bubble-surface active liquid coupling medium is stored in the coal seam, dust falling is conducted on the coal seam, reverse wetting of the coal seam is achieved, the water content is increased, and therefore dust is reduced, and the safety of coal mining is improved.

The invention relates to the technical field of scale inhibition materials, in particular to a slowly-dissolved micro-nano dispersion scale inhibition material and a preparation method thereof. The composite material comprises a four-layer structure, wherein a porous hydroxyapatite core anchors DTPMP through phosphate radical vacancy to inhibit burst release; sulfonated polyetheretherketone and a cross-linking agent are compounded to form an ion selective controlled release layer, and the diffusion rate of the scale inhibitor is regulated and controlled; photo-thermal conversion graphene quantum dots are embedded in a temperature-sensitive hydrogel shell, and dynamic release is triggered through temperature or Ca < 2 + > concentration; and the corrosion resistance and the mechanical stability are enhanced by the atomic layer deposited ceramic layer and the epoxy resin packaging layer. By constructing a four-layer composite slow-release system, long-acting scale inhibition, extreme tolerance and dynamic response are achieved, the technical problems that a traditional scale inhibition material is high in burst release rate, poor in weather resistance and delayed in release are solved, the water treatment cost per ton is low, the RO membrane service life is long, and a full-period efficient scale inhibition solution is provided for a complex industrial water system.

The invention relates to the technical field of metal materials, and discloses a composite metal material based on micro-nano porous copper powder, which is composed of the following components: a matrix is micro-nano porous copper powder with the particle size of 50-500 nanometers, the porosity is 30-80%, and the pore diameter is 20-200 nanometers; the metal additive comprises 5-20 wt% of aluminum powder and 3-15 wt% of nickel powder; the functional additive comprises 1 to 8 weight percent of titanium powder, 0.5 to 5 weight percent of graphene and 0.3 to 3 weight percent of a carbon nano tube; a nickel-titanium alloy coating with the thickness of 50-500 nanometers is formed on the surface of the micro-nano porous copper powder through electrochemical deposition. Through the graded hole design of the micro-nano porous copper powder, a main hole channel provides a rapid electron transmission path, the powder gap stress is eliminated in the low-temperature pre-pressing stage, and atom diffusion and densification are promoted in the high-temperature and high-pressure stage, so that the resistance can be effectively reduced, the loss of energy in the transmission process is reduced, and the energy transmission efficiency of the whole system is improved.