144 results about "Micro nanoparticles" patented technology

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 invention belongs to the technical field of brazing materials, and particularly relates to micro-nano particle reinforced nickel-based ultralow-melting-point wear-resistant brazing filler metal and a preparation method and application thereof. The invention provides micro-nano particle reinforced nickel-based ultralow-melting-point wear-resistant brazing filler metal. The micro-nano particle reinforced nickel-based ultralow-melting-point wear-resistant brazing filler metal comprises 94-99 parts of ultralow-melting-point nickel-based brazing filler metal and 1-6 parts of micro-nano particles. The ultralow-melting-point nickel-based brazing filler metal contains B, Si, In, Sn and Cu elements at the same time, and the melting temperature of the brazing filler metal can be cooperatively reduced; and meanwhile, the micro-nano particles are added, so that the strengthening and abrasion increasing effects on the nickel-based brazing filler metal can be effectively guaranteed, and meanwhile the flowability of the brazing filler metal is not affected. Therefore, through component design of the nickel-based brazing filler metal and synergistic cooperation of the micro-nano particles, the melting point of the brazing filler metal can be remarkably reduced, the brazing filler metal can be endowed with excellent hardness and wear resistance, and the technical bottlenecks that traditional nickel-based brazing filler metal is high in melting temperature and poor in wear resistance and brazed diamond is subjected to thermal damage are solved; and the method has a wide application prospect in brazing of diamond tools.

The invention relates to a preparation method and application of a composite piezoelectric catalytic material NaNbO3-coated BiFeO3 for rapidly degrading antibiotics, NaNbO3 is flaky crystal grains with [001] crystallographic orientation prepared by a two-step molten salt method, and BiFeO3 is micro-nano particles prepared by a coprecipitation method. Composite micro-nano BiFeO3 powder and [001] oriented NaNbO3 flaky grains form a heterojunction, conversion of mechanical energy and electric energy of the material is achieved under the ultrasonic vibration condition, inductive charges are generated on the surface of the material, and photon-generated carriers move reversely under driving of a built-in electric field. According to the invention, the piezoelectric catalytic degradation capability of the BiFeO3 and NaNbO3 composite piezoelectric catalytic materials with different proportions on four antibiotics, namely oxytetracycline, levofloxacin, carbamazepine and paracetamol in different time periods is researched. When the mass ratio of the BiFeO3 to the NaNbO3 composite material is 1: 3, the oxytetracycline degradation rate within 30 min can reach 78.2%, the oxytetracycline degradation rate within 120 min can reach 91.8%, and the piezoelectric electro-catalysis characteristic is rapid and efficient. The method disclosed by the invention has important significance in developing a high-efficiency piezoelectric catalyst for degrading antibiotics.

The invention belongs to the technical field of medical materials, and relates to a high-toughness antibacterial hemostatic chitosan hydrogel dressing and a preparation method thereof. According to the invention, vinyl rare earth cerium oxide micro-nano particles are introduced into a polymer network as a cross-linking agent, the chitosan hydrogel dressing with excellent mechanical properties and antibacterial and hemostatic functions is successfully constructed, when the micro-nano particles are subjected to external stress, energy can be dissipated through mechanisms such as deformation, unwrapping, chain slippage and the like, so that the chitosan hydrogel dressing is prepared. Therefore, the hydrogel dressing is endowed with excellent strength, toughness and cyclic load resistance.

The invention relates to the technical field of sewage treatment, in particular to a metal sulfide nanoparticle slow-release activator for sewage treatment and a preparation method of the metal sulfide nanoparticle slow-release activator for sewage treatment. The surface of the core layer is coated with the porous silicon dioxide membrane shell layer; the citric acid modifier is loaded on a core-shell interface; according to the invention, metal sulfide (such as FeS, MoS2, WS2 and the like) micro-nano particles are used as a solid-phase slow-release activator, so that the core problem of a traditional homogeneous activation system is radically solved. Firstly, the metal sulfide exists in the form of a solid phase and can directly contact and react with permanganate without an additional dissolving step, so that the problem of complicated process operation caused by poor solubility of activating agents such as sulfite is thoroughly avoided, and the process of reclaimed water treatment is simplified. The problem of poor continuous oxidation effect of a traditional homogeneous system is thoroughly solved.

The invention discloses a dispersion distribution method for a micro-nano multi-scale mixed SiC particle reinforced phase in an aluminum-based composite material and the composite material, and relates to the technical field of metal-based composite material preparation. The method comprises the following steps: firstly, carrying out ultrasonic cleaning, ultrasonication and two-stage high-temperature oxidation treatment on SiC particles, and generating an oxidation film on the surfaces of the particles; ball-milling and mixing the treated micron and nano SiC particles and micron pure magnesium particles according to a specific proportion, and pressing into a precast block; then preparing an aluminum alloy melt, cooling to a solid-liquid two-phase region, carrying out semi-solid stirring, and adding the preheated precast block; and finally, raising the temperature to be above a liquidus, rewarming, stirring and molding by casting. Through the synergistic effect of ultrasonic physical dispersion, high-temperature oxidation surface modification and magnesium-induced semi-solid stirring, the problems that micro-nano particles are prone to agglomeration, wettability is poor and interface reaction is difficult to control are effectively solved, multi-scale uniform dispersion distribution of a reinforced phase in an aluminum matrix is achieved, and the comprehensive performance of the composite material is remarkably improved.

The invention discloses a high-performance super-hydrophobic coating, and relates to the technical field of coating preparation. The high-performance super-hydrophobic coating comprises a composite resin matrix composed of polyurethane and polyethersulfone, and zinc selenide nanoparticles and hydrophobic modified inorganic micro-nanoparticles used for constructing a super-hydrophobic surface are dispersed in the composite resin matrix. Polyether sulfone has good tolerance, can significantly improve the thermal stability and structural strength of the coating in a high-temperature environment, and can be blended and crosslinked with a polyurethane network to form a more stable multiphase composite system, enhance the crack resistance and peel strength of the coating, and effectively improve the adhesive force; the zinc selenide nanoparticles can effectively absorb ultraviolet rays and protect the organic resin matrix from being damaged by ultraviolet radiation. The high-performance super-hydrophobic coating provided by the invention is suitable for outdoor severe environments with high temperature, strong ultraviolet radiation and chemical corrosion risk, and long-term stable protection can be provided for outdoor equipment by coating the surface of the outdoor equipment with the high-performance super-hydrophobic coating to form a protective coating.

The invention discloses a preparation method of nanorods, micro-nano particles and flaky mixed gold powder. The preparation method comprises the following steps: (1) taking ethylene glycol, high-purity water or a mixed solution of ethylene glycol and high-purity water as a solution a; (2) dissolving chloroauric acid in the solution a to obtain a solution b; (3) dissolving disodium ethylene diamine tetraacetate in the solution b to obtain a solution c; (4) dissolving polyvinylpyrrolidone in the solution c to obtain a solution d; (5) dissolving a reducing agent in the solution d to obtain a solution e; (6) adding sodium hydroxide into the solution e to obtain a solution f; (7) transferring the solution f into a polytetrafluoroethylene liner, and then performing hydrothermal reaction to prepare gold powder; and (8) washing, separating and drying the gold powder to prepare the gold powder with different shapes and sizes. The preparation method is simple, high-cost equipment is not needed, the batch morphology of the product is stable, and large-scale low-cost preparation of the gold powder is facilitated.

The invention provides a high-durability super-amphiphobic aircraft anti-icing coating and a preparation method thereof.The preparation method comprises the steps that silicon dioxide nanoparticles are loaded on the surfaces of micron attapulgite particles in situ to prepare core-shell structure micro-nano composite particles, and low-surface-energy fluorosilane is added for modification; meanwhile, fluorinated modification is conducted on a waterborne polyurethane adhesive through fluorosilane, the modified micro-nano particles are introduced into the modified polyurethane adhesive, then the surface of semi-cured airplane paint is evenly sprayed with the modified polyurethane adhesive, and the super-amphiphobic anti-icing coating is prepared through curing. The super-double hydrophobic surface prepared by the method shows excellent repellency to liquids (water, rapeseed oil, lubricating oil and hexadecane) with different surface tensions, can delay icing of liquid drops on the surface of a coating for 440 seconds at-15 DEG C, and has excellent comprehensive protection performance of wear resistance, airflow impact resistance, oil stain resistance and acid and alkali corrosion resistance; good super-amphiphobic performance can be kept after mechanical wear and chemical corrosion.

The utility model belongs to the technical field of mixing equipment, and discloses micro-nano particle mixing equipment. The micro-nano particle mixing equipment comprises a barrel, a stirring paddle and a scattering disc, a containing cavity is formed in the barrel, and a feeding port and a discharging port are formed in the outer wall of the barrel; the stirring paddle is arranged in the cylinder body and can rotate around the axis of the stirring paddle; the stirring paddle is provided with an inner helical ribbon and an outer helical ribbon which extend in the axial direction, the helical directions of the inner helical ribbon and the outer helical ribbon are opposite, and the inner helical ribbon can stir and drive materials in the barrel to move in the axial direction; the scattering disc is arranged at the tail end of the material moving direction driven by the inner spiral belt and comprises a plurality of scattering pin rods distributed in the circumferential direction, and the scattering pin rods are located in the containing cavity and can rotate around the central axis of the scattering disc. According to the micro-nano particle mixing equipment, agglomerated micro-nano particles can be scattered and remixed, the original integrity of the micro-nano particles is kept, the mixing uniformity and mixing efficiency of the micro-nano particles are improved, and the production quality is improved.

The utility model relates to a hydrogel patch with an oral cavity restoration function, which comprises a gel layer, a composite layer arranged at the top of the gel layer, a polyvinyl alcohol layer arranged at the top of the composite layer, an anti-inflammatory layer arranged at the top of the polyvinyl alcohol layer, a polyethylene glycol diacrylate layer arranged at the top of the anti-inflammatory layer, and an anti-inflammatory layer arranged at the top of the polyethylene glycol diacrylate layer. A plurality of placing grooves are formed in the top of the polyvinyl alcohol layer, and micro-nano particles are arranged in inner cavities of the placing grooves. The oral cavity patch has the advantages of being good in stability and good in treatment effect, in the actual using process, the gel layer and the double-layer thiolated alginate layer are additionally arranged and used for providing enhanced adhesion, it is ensured that the patch can be tightly attached to the interior of the oral cavity, stability is kept, materials with higher adhesion are introduced, and the effect is good. Therefore, the patch can be firmly attached to a damaged part even in a humid environment; and a lasting moisturizing effect is provided through the hyaluronic acid layer.

Disclosed is a zinc zoledronate micro-nanoparticle adjuvant, which contains zinc and zoledronic acid and optionally contains a phosphate and aluminum. The preparation method therefor comprises performing mixed precipitation on a soluble salt solution containing zinc ions, zoledronic acid, and sodium hydroxide. The adjuvant can be used to prepare vaccines, etc.

The invention discloses a micro-nano rock-soil robot geological disaster multi-source information fusion early warning system which is characterized by comprising a micro-nano rock-soil robot cluster, a wireless energy supply system, electromagnetic modified micro-nano particles, a data transmission and control module, an injection deployment system, a main control unit, an information fusion analysis module and an early warning module. The early warning system can realize multi-dimensional and multi-scale information monitoring of geological disasters, has high timeliness, accuracy and reliability, is suitable for application scenes of landslide, slope collapse, tunnel deformation, tailing dam safety monitoring and the like, and provides technical support for early warning and risk assessment of geological disasters.

The invention provides a double-barrier self-lubricating anti-coking composite coating and a preparation method thereof, and belongs to the technical field of boiler anti-coking coatings. The composite coating comprises a bottom layer and a surface layer, the bottom layer is of a porous structure, and the bottom layer is made of an alloy material; the surface layer comprises a coating layer located on the bottom layer and an embedded layer embedded in the porous structure of the bottom layer, and the surface layer is made of a micro-nano ceramic composite material. The porous bottom layer coating provides implantation for the surface layer ceramic particles, the micro-nano particles of the surface layer can be physically embedded into pores of the bottom layer porous material, the binding force between the surface layer ceramic particles and a base body is increased, the service life of the coating is prolonged, and a microcosmic composite material coating interface is formed by the multi-element corrosion-resistant alloy and the micro-nano ceramic material.

The embodiment of the invention provides a mask preparation method and a patterning method. The mask preparation method comprises the following steps: providing a substrate, a template and micro-nano particles; assembling micro-nano particles on the first surface or the second surface to form a micro-nano particle layer; the template and the substrate are stacked, so that the micro-nano particle layer is located between the first surface and the second surface; pressing the template and the substrate; the template is separated from the substrate, so that a patterned micro-nano particle array located on the substrate is obtained, and the pattern of the micro-nano particle array is consistent with the preset transfer printing pattern; and modifying the micro-nano particle array to obtain a mask layer which is tightly combined with the substrate. According to the mask preparation method and the patterning method disclosed by the invention, the mask is prepared by adopting the micro-nano particles, and the patterning transfer printing is carried out by adopting the template, so that the mask preparation method and the patterning method do not depend on complicated light paths and equipment, have the advantages of low cost, high preparation speed and low equipment requirement, and can replace a traditional photoresist mask to a certain extent.

The invention discloses an in-situ doped ZnO paper-based insulating material and a preparation method thereof, and belongs to the technical field of paper-based special materials in paper industry. The method disclosed by the invention comprises the following steps: mixing and stirring zinc chloride and water to obtain a zinc chloride hydrated eutectic solvent; then soaking the porous base paper in a zinc chloride hydrated deep-eutectic solvent for swelling treatment to obtain gelatinized base paper; immersing the gelatinized raw paper into an ethanol / water anti-solvent system for regeneration treatment to obtain regenerated raw paper; then dipping the regenerated raw paper in alkali liquor for in-situ deposition treatment to obtain raw paper with ZnO micro-nano particles loaded and doped on the surface; and performing post-treatment on the body paper with the surface loaded and doped with the ZnO micro-nano particles to obtain the in-situ doped ZnO paper-based insulating material. According to the method disclosed by the invention, in-situ doping of the ZnO micro-nano particles is successfully realized in the densified base paper, and the dielectric property is further remarkably improved by cooperating with the densification effect.

The application provides a foamed alkali-activated cementitious material, which is composed of an intermediate layer and surface layers covering the upper and lower surfaces of the intermediate layer, and the intermediate layer and the surface layers comprise the following raw materials: 30-50 parts by mass of blast furnace slag, 12-18 parts by mass of low-calcium fly ash, 9-15 parts by mass of alkaline magnesium slag, 10-15 parts by mass of alkali activator, 6-8 parts by mass of foaming agent and 3-5 parts by mass of foam stabilizer; the surface layer further comprises 1.5-5 parts by mass of functional catalyst, and the functional catalyst is gel-like micro-nano TiO2 particles. The application utilizes fly ash, magnesium slag and slag and other types of solid waste to prepare building materials with the ability to degrade formaldehyde. Compared with traditional porous foamed materials, the foamed alkali-activated cementitious material prepared by using aluminum powder as a foaming agent has the advantage of utilizing industrial by-products, and the excess aluminum powder not only produces a dense and uniform pore structure, but also is conducive to the adsorption of formaldehyde gas and the improvement of mechanical strength.

The invention discloses a silicon carbide / molybdenum alloy gap filling and low-temperature connection process based on metal slurry, and belongs to the field of material connection. The nickel-based micro-nano slurry is composed of nickel-based micro-nano particles and an organic auxiliary agent, and is formed after vacuum stirring and defoaming. The nickel-based micro-nano particles comprise Ni nano particles, NiCr micro particles and Si nano particles. The method comprises the following steps: firstly, uniformly coating nickel-based micro-nano slurry on a silicon carbide / molybdenum alloy connecting surface; secondly, vacuum sintering is conducted in a tubular furnace, the silicon carbide / molybdenum alloy connector is obtained, and the connector has high strength and heat conductivity. The Si nanoparticles are added, so that the wettability of the nickel-based micro-nano slurry and a silicon carbide base material is enhanced, a connection joint obtained after sintering has higher strength and thermal conductivity, the brush coating process can be adopted to cope with various special-shaped structures, connection gaps of the special-shaped structures are filled compactly, and the connection joint with excellent mechanical property and thermal property is obtained.

The invention belongs to the technical field of super-hydrophobic gel, and particularly relates to super-hydrophobic composite hydrogel as well as a gradient assembly preparation method and application thereof. The method comprises the following steps: (1) copolymerizing isopropyl acrylamide, acrylamide, methyl methacrylate and hydroxypropyl methyl cellulose to prepare a hydrogel substrate, and then immersing the substrate into a solution containing poly (4-bromomethyl styrene) to carry out n-alkylation surface modification; (2), SiO2 (at) PDA micro-nano particle powder and perfluorosilane modified halloysite nanotube powder are prepared respectively; and (3) stretching the modified hydrogel substrate, sequentially coating the SiO2 (at) PDA micro-nano particles on the surface of the hydrogel substrate to form a middle layer, then coating the perfluorosilane modified halloysite nanotube powder, and carrying out rolling treatment to form an outer surface layer, thereby finally obtaining the super-hydrophobic composite hydrogel.

The present application belongs to the technical field of agricultural bio-based slow-release carriers and pesticide formulations, and relates to a kind of lignin-based pesticide controlled-release micro-nanoparticles with multiple stimuli response and a preparation method thereof, lignin and hydrochloric acid dopamine are dissolved in buffer solution in proportion, an oxidizing agent is added thereto, stirred and reacted to obtain a lignin-polydopamine composite solution, which is purified by dialysis in water, dried to obtain a lignin-polydopamine solid powder; the lignin-polydopamine solid powder and abamectin are mixed in an organic solvent in a mass ratio of 1-5:1, then water is added in portions while stirring, the polarity of the system is changed, and the lignin-polydopamine micro-nanoparticle drug-loaded particles loaded with abamectin are precipitated, which are dried to obtain the present application. The abamectin delivery system has multiple environmental responsiveness, long-acting leaf adhesion function and controllable release characteristics.

The embodiment of the invention provides a manufacturing method of a wick and a vapor chamber. The manufacturing method comprises the following steps: providing a stainless steel mesh; and a laser is adopted to scan the surface of the stainless steel mesh, so that a wrinkle-shaped structure and a particle structure are formed on the surface of the stainless steel mesh. The manufacturing method of the wick provided by the embodiment of the invention at least has the following beneficial effects that the laser is adopted to scan the surface of the stainless steel mesh, so that a hydrophilic wrinkle-shaped structure and a plurality of micro-nano particles are formed on the surface of the stainless steel mesh, the hydrophilic performance of the wick is improved, and the wick is more compact. And the heat dissipation requirement with higher energy can be met.

The present invention discloses a large-area patterned micro-nano particle self-assembly structure and a preparation method thereof, wherein the method comprises: (1) adding a dispersion containing hydrophobic micro-nano particles into water to form a micro-nano particle film at a liquid-gas interface; (2) transferring the micro-nano particle film to a patterned template; (3) forming an adhesion layer on a substrate, and then transferring the patterned template with the micro-nano particle film obtained in step (2) to a substrate containing an adhesion layer and applying pressure, wherein the micro-nano particle film is in contact with the adhesion layer; (4) removing the adhesion layer at the outer edge of the structure obtained in step (3) to obtain a large-area patterned micro-nano particle self-assembly structure. Therefore, the method has the advantages of fast preparation speed, large area of ​​the prepared patterned micro-nano particle self-assembly structure, high preparation accuracy, strong shape controllability and high preparation stability.

The invention discloses a catalytic membrane capable of repeatedly self-growing an active layer. A flaky solid of a layered double hydroxide micro / nano active layer is self-grown in situ on a geopolymer inorganic membrane; the invention also discloses a preparation method and application of the catalytic membrane. According to the catalytic membrane, the layered double hydroxide active layer with the micro / nano structure is subjected to in-situ hydro-thermal synthesis, the multifunctional catalytic membrane with the repeatable self-growing active layer is obtained, the repeatable and self-growing active layer can be achieved for multiple times, and micro / nano particles are not prone to falling off from a carrier in the using process.

The invention belongs to the field of metal-based composite materials, and relates to a micro-nano particle reinforced metal-based composite material and a preparation method thereof. Comprising the following steps: mixing micro-nano reinforced particles and salt particles in proportion, heating to melt the salt particles, and ultrasonically stirring to obtain molten salt-micro-nano turbid liquid; smelting a metal matrix to obtain a metal melt, adding the molten salt-micro-nano suspension into the metal melt, stirring to obtain a mixture melt, and preserving heat; stopping stirring, allowing the mixture melt to stand, allowing the micro-nano reinforced particles to enter the metal melt from the molten salt to form an alloy melt, and keeping the temperature until the molten salt and the alloy melt are layered; and casting the alloy melt and the molten salt together, cooling, and stripping the salt body to obtain the micro-nano particle reinforced metal matrix composite material. According to the preparation method, the metal-based composite material with uniformly dispersed micro-nano particles is obtained by optimizing the preparation process, meanwhile, the preparation difficulty and the preparation cost are reduced, and a solution with application potential is provided for industrial production of the metal-based composite material.

The present disclosure provides a double-barrier self-lubricating anti-coking composite coating and a preparation method thereof, and belongs to the technical field of boiler anti-coking coating. The composite coating comprises a bottom layer and a surface layer. The bottom layer is of a porous structure and is formed of an alloy material. The surface layer comprises a cladding layer on the bottom layer and an embedded layer embedded in the porous structure of the bottom layer, and the surface layer is formed of a micro-nano ceramic composite material. The porous bottom layer coating provides a "bedding" for the surface layer ceramic particles. The micro-nano particles of the surface layer can be physically embedded in the pores of the porous material of the bottom layer, thereby increasing the bonding force between the surface layer ceramic particles and the substrate, prolonging the service life of the coating, and forming a micro composite material coating interface by the multi-element corrosion-resistant alloy and the micro-nano ceramic material.

The present application relates to the technical field of medicine, in particular to a functional nanomaterial based on choline phosphate-cell membrane interaction and application thereof.The present application modifies manganese mineralized black phosphorus nanomaterial by bio-inspired polymer pGluCP adsorption, which retains the excellent biocompatibility and photothermal performance of BP, and at the same time, pGluCP enhances the 'chassis' effect of the material, captures tumor-related antigens, and can simultaneously capture water-soluble antigens and water-insoluble membrane antigens and form pathogen-like micro-nanoparticles, which is helpful for antigen delivery and APC presentation, and provides a feasible tool for capturing non-water-soluble membrane antigens, which is a major challenge.MnBP and pGluCP synergistically act, and can realize the personalized conversion of autologous tumors to vaccine production and delivery.

The invention belongs to the technical field of oil-gas field development and recovery efficiency improvement, and particularly relates to a resistance-increasing type in-situ gel deep profile control agent and a preparation method thereof. The resistance-increasing type in-situ gel deep profile control agent is prepared from the following raw materials in percentage by weight: 3 to 8 percent of water-soluble functional monomer, 0.5 to 2 percent of functional micro-nano particles, 0.3 to 1 percent of gelling control agent and the balance of water. The profile control agent reacts in a stratum to form three-dimensional network structure gel with functional micro-nano particles as crosslinking nodes, so that the temperature resistance is greatly improved, the dehydration rate at the constant temperature of 120 DEG C for 90 days is lower than 10%, and the profile control agent can be used for deep profile control of oil reservoirs at the high temperature of 120 DEG C.

The embodiment of the invention provides an electret film, a power generation device and electronic equipment, and belongs to the technical field of electrets. The electret thin film comprises an electret substrate, a first hole structure and first micro-nano particles. The first pore structure is arranged on the electret substrate and is used for accommodating the first micro-nano particles; at least one surface of the electret substrate is provided with first micro-nano particles. According to the electret film, the power generation device and the electronic equipment provided by the embodiment of the invention, the energy collection efficiency can be improved, so that the endurance time of the electronic equipment is prolonged.

This invention discloses a method for determining the surface charge density of micro / nano particles. The method first uses light scattering technology to determine the critical agglomeration concentration of micro / nano particles at a given electrolyte type and temperature. Then, under this concentration condition, the resultant force of electrostatic repulsion and long-range molecular attraction between particles is calculated, and the particle surface potential under this condition is determined. Finally, the surface charge density of the particles is obtained based on the obtained surface potential. This invention can accurately calculate the surface charge density of micro / nano particles by determining the critical agglomeration concentration using a laser scattering instrument, eliminating the need to separately measure the outer surface area of ​​the particles in a gaseous medium and the number of surface charges in a liquid medium before calculating the surface charge density.

The invention provides a multi-dynamic-bond cross-linked organic silicon resin, a multifunctional low-surface-energy anti-icing and deicing coating composition and a preparation method of the multi-dynamic-bond cross-linked organic silicon resin and the multifunctional low-surface-energy anti-icing and deicing coating composition. The finishing paint is also prepared by mixing the organic silicon resin serving as a resin matrix with the modified photo-thermal micro-nano particles. The coating composition can endow a base material with excellent photo-thermal conversion performance and super-hydrophobic performance, does not influence the original mechanical property and use performance of the base material, and can effectively solve the problems of insufficient mechanical stability and poor environmental adaptability of a super-hydrophobic coating in the prior art. And the requirements of fluoride-free environmental protection, stable anti-icing / deicing and long-term service on the coating material are met.