107results about How to "Permeation barrier" patented technology

The invention discloses a solid waste-based cold-mixed asphalt mixture for preventive maintenance as well as a preparation method and application thereof, and belongs to the technical field of road engineering. The solid waste-based cold-mixed asphalt mixture is prepared from the following components in percentage by mass: 4.7 to 8.6 percent of modified cold-mixed asphalt adhesive, 85.8 to 93.9 percent of aggregate and 1.4 to 5.6 percent of composite filler, the modified cold-mixed asphalt adhesive is prepared from the following components in parts by weight: 86 to 96 parts of emulsified asphalt, 1 to 5 parts of bisphenol A type waterborne epoxy resin emulsion, 0.05 to 1 part of curing agent, 0.01 to 0.05 part of defoaming agent, 1.5 to 8 parts of waterborne polyurethane emulsion and 1 to 3 parts of hydroxypropyl methyl cellulose. The solid-waste-based cold-mixed asphalt mixture prepared by the method shows excellent comprehensive performance in high-temperature rut resistance, water damage resistance, freeze-thaw resistance, skid resistance, volume stability, interlayer shear resistance and the like, promotes reasonable utilization of solid waste resources, and has good economic and environmental benefits.

The invention provides a preparation method of an HNT modified polymer composite membrane. The preparation method comprises the following steps: S1, preparing dealuminated HNT; s2, preparing modified HNT by using the dealuminated HNT; s3, preparing sulfonated polyether ether ketone; s4, performing ionization treatment on the sulfonated polyether ether ketone; and S5, preparing the HNT modified polymer composite membrane by using the modified HNT and the sulfonated polyetheretherketone or perfluorosulfonic acid membrane obtained in the step S4. The problems that an existing flow battery diaphragm is poor in comprehensive performance, high in cost and not suitable for various systems are solved.

The invention relates to a flame-retardant cellulose composite film and a preparation method thereof, belongs to the field of flame-retardant materials, and aims to solve the problems that a cellulose film is inflammable, poor in compatibility with an inorganic flame retardant, relatively low in mechanical property and the like. The main components of the composite membrane comprise nanocellulose, titanate nanofibers, carbon dots and a cross-linking agent. The preparation method comprises the following steps: firstly, enabling the carbon dots to react with the nanocellulose under the action of an initiator; secondly, adding titanate nanofibers into the carbon dot modified nanocellulose suspension, and uniformly mixing; then, adding a cross-linking agent and uniformly dispersing to obtain a mixed solution; and finally, casting the solution into a culture dish, and curing in a vacuum drying oven to prepare the flame-retardant cellulose composite film. According to the preparation method, the compatibility of the flame retardant and the nano cellulose is remarkably improved, the mechanical property is enhanced, and the composite film has excellent flame retardance, smoke suppression and heat insulation characteristics and is suitable for preparing the flame-retardant cellulose composite film.

The invention relates to a perovskite solar cell and a preparation method thereof, and belongs to the technical field of solar cells. The perovskite solar cell comprises a conductive substrate, a hole transport layer, a passivation layer, a perovskite layer, an electron transport layer and a metal electrode which are arranged in sequence, the material of the passivation layer is selected from one or more of mercaptoethylamine, ethylenediamine and propylamine; and the thickness of the passivation layer is 1 nm to 10 nm. Through the introduction of interface passivator molecules, the interface between the hole transport layer and the perovskite layer is improved. The surface wettability of the PTAA thin film is enhanced, so that the perovskite precursor solution can form a uniform and compact perovskite layer on the PTAA / SCAs thin film, the carrier separation and transmission efficiency at an interface is improved, and the stability of a device is enhanced.

The invention discloses a hydrogen-corrosion-resistant coating material for a hydrogen-rich electrolyte environment and a preparation method thereof, and relates to the technical field of hydrogen-corrosion-resistant coating materials, the coating material comprises the following components by weight: a metal matrix reinforcing material: 30%-50% of nickel and 5%-10% of cobalt; the ceramic particles comprise 10%-20% of aluminum oxide and 5%-15% of The coating material disclosed by the invention shows excellent corrosion resistance, wear resistance and hydrogen embrittlement resistance in a hydrogen-rich electrolyte environment. The nickel-cobalt alloy layer is kept stable at high temperature and high pressure, hydrogen permeation is blocked, and material degradation is prevented. Aluminum oxide and silicon carbide improve the hardness and wear resistance of the coating, and the coating is kept intact in temperature circulation. The rare earth elements yttrium oxide and cerium oxide enhance the oxidation resistance and hydrogen embrittlement resistance. And the dispersing agent and the cross-linking agent further improve the uniformity, compactness and adhesion of the coating, so that the coating is suitable for industrial parts in high-pressure and high-stress environments.

The invention discloses a preparation method of a foamed thermal-insulation ceramic decorative plate in the technical field of building decorative materials. The method comprises the following steps: carrying out ball milling, spray drying, granulating and ageing on raw materials such as ceramic waste and kaolin; mixing and dispersing the aerogel-hydrogel gradient core-shell structure composite modified material and ceramic particles, and sieving to obtain composite powder; compounding sodium bicarbonate and azodicarbonamide with a foaming agent, mixing the foaming agent with the composite powder, and adding a surfactant and a dispersing agent to adjust the viscosity so as to prepare expandable ceramic slurry; the slurry is injected into a mold and coated with low-temperature glaze, and stepped heating sintering is conducted through a tunnel kiln and comprises the steps of preheating glue discharging, primary foaming, secondary sintering, gradient cooling and the like. The thermal insulation performance, the mechanical strength, the weather resistance and the decoration performance are synergistically improved, and the product is low in heat conductivity coefficient, high in compressive strength, excellent in ultraviolet aging resistance, firm in decoration layer combination and suitable for building outer walls and other scenes.

The invention belongs to the technical field of flow batteries, and discloses a porous diaphragm for a flow battery and a preparation method thereof.The porous diaphragm comprises a polymer porous base membrane and polyelectrolyte nanoparticles which are electrostatically adsorbed on the surface of the polymer porous base membrane and openings of surface through holes, the polyelectrolyte nanoparticles are formed by cross-linking a polyanion electrolyte and a polycation electrolyte; the polyelectrolyte nano-particles are electrostatically adsorbed to openings of through holes in the surface of the polymer porous base membrane to form a rivet structure; the preparation method comprises the following steps: preparing a polymer porous base membrane from a polymer membrane casting solution in a non-solvent induced phase separation manner, then alternately soaking the polymer porous base membrane in an acidic salt solution of polycation electrolyte and a salt solution of polyanion electrolyte in sequence, and finally cross-linking in a cross-linking agent aqueous solution to obtain the porous diaphragm for the flow battery. The porous diaphragm prepared by the invention has high chemical stability, high dimensional stability and low vanadium ion permeability, and also has excellent cycle stability.

The invention relates to the technical field of inflatable bubble bag composite film processing, in particular to a preparation process of a paper protective inflatable bubble bag composite film and a product thereof, and the preparation process comprises the following preparation steps: S1, coating waterproof and air-isolating glue on the surface of a base material, and drying to form a waterproof and air-isolating layer to obtain a waterproof and air-isolating composite film, the waterproof and air-insulation glue is prepared by mixing polyvinyl alcohol, polyurethane modified organic silicon, water-soluble chitosan, water-soluble acrylic resin, 2-ethylhexyl acrylate, a cross-linking agent, ethanol and water; s2, the kraft paper and the waterproof and air-proof composite film are pressed at the pressing temperature of 140-150 DEG C and the pressing pressure of 12-16 MPa, so that the kraft paper and the waterproof and air-proof layer are adhered to each other, and a kraft paper composite film is obtained; s3, tearing off the base material layer; and S4, the surface of the waterproof and air insulation layer is coated with heat sealing glue, drying is conducted, and the paper protective inflatable bubble bag composite film is obtained and has good waterproof and air insulation performance.

The invention discloses a durable rust-proof metal storage box coated with a protective coating and a coating method of the durable rust-proof metal storage box. The coating method comprises the steps that a plurality of needed metal storage boxes are selected, and oil stains and oxidation films on the surfaces of the metal storage boxes are removed through an electrolytic method; the method comprises the following steps: performing laser drilling treatment on the surface of a metal storage box to process a micron-sized elliptical hole structure, then performing high-temperature modification on the surface of the metal storage box, preparing an electrophoresis tank, adding an electrophoresis solution, and immersing the metal storage box as a cathode into the electrophoresis solution, applying a direct-current electric field to uniformly disperse the coating in the electrophoretic liquid onto the surface of the metal storage box and into the elliptical hole structure to form a layered structure; the dip-coated metal storage box is subjected to high-temperature baking and hot pressing to form a uniform protective coating; the elliptical hole structure is filled with the coatings with different particle sizes, and the coatings are distributed on the surface of the metal storage box, so that the layered structure of the coating is realized, the mechanical embedding between the coating and the metal box base body is increased, and the adhesive force of the coating is improved.

The present invention provides a method, system, equipment and medium for monitoring the sealing of an organic electroluminescent device, including: using an organic material with strong moisture resistance and adhesion as the first layer of encapsulation; using an inorganic material to form a dense encapsulation layer in the second layer, embedding a humidity sensor and an oxygen sensor between the inorganic material layer and the next layer, and after the inorganic material layer is deposited, using an optical interference detection technology to detect the encapsulation layer, and then monitoring the electrical characteristics to detect whether there is a change in the electrical performance of the device caused by the deposition of the material; uniformly covering the surface of the second layer of inorganic material with a composite material as the third layer, annealing and curing the encapsulation layer at a low temperature, leaving enough space in the sensor area for signal transmission; after the fourth layer of encapsulation is completed, using a non-contact optical detection method, through sensor data, verifying whether the sealing effect of each layer meets expectations. The present invention monitors the encapsulation state in real time, effectively blocks the penetration of moisture and oxygen, and improves the sealing and stability of the device.

The invention provides a composite carbon black material for artificial stone as well as a preparation method and application thereof, the composite carbon black material for artificial stone comprises the following raw materials in parts by weight: 10 parts of carbon black and 3 parts of a siloxane complexing agent, the moisture content of the composite carbon black material is less than 1%, and the particle size is less than or equal to 10 microns. The composite carbon black material for the artificial stone can be applied to production of quartz plates, and the composite carbon black accounts for 2-6% of the mass of the quartz plates. According to the composite carbon black material for the artificial stone as well as the preparation method and the application of the composite carbon black material, the compatibility with a quartzite base material can be enhanced, and the water absorption rate of a plate is reduced, so that the anti-knock performance and the waterproof and impermeable performance are improved.

The invention discloses a waterproof construction method for a cave dwelling building roof. The waterproof construction method comprises the following steps that firstly, part of original covering soil is dug; 2, mixing the excavated original covering soil with a curing agent, an additive and water to obtain flow-state solidified soil; and thirdly, a first layer of flow state solidified soil is poured on the compacted covering soil, then an adhesion agent is brushed, geogrids are laid, and then a second layer of flow state solidified soil is poured. According to the method, part of original covering soil of the cave dwelling building roof is excavated and prepared into the flow-state solidified soil, finally the flow-state solidified soil is poured back to the cave dwelling building roof, site spoil is utilized, resource utilization of building waste is achieved, and the method is economical and environmentally friendly; meanwhile, narrow gaps, pores and cracks which are difficult to treat by a traditional material are filled by utilizing the fluidity and the self-compaction characteristic of the fluid-state solidified soil; and furthermore, a solidified body formed after hardening has excellent anti-permeability performance, so that permeation of kiln crown covering soil water is effectively blocked, the stubborn disease of kiln crown covering soil water seepage is radically treated, and the material cost is reduced by more than 30% compared with that of a traditional method.

The utility model relates to the technical field of damp-proof and dry maintaining devices, in particular to a building underground structure damp-proof and dry maintaining device which comprises a basement wall body, the inner wall of the wall body is coated with a damp-proof coating to reduce the damp risk of the wall body, and a damp-proof layer is fixedly arranged on the outer side of the wall body to effectively prevent underground water or rainwater from leaking. Meanwhile, the interior of the basement is kept dry and comfortable, a heat preservation layer is fixedly arranged on one side of the damp-proof layer, a waterproof and vapor-proof layer is arranged on one side of the heat preservation layer, moisture and water vapor are prevented from entering the basement through dual protection, an empty layer and a pipeline are arranged between the heat preservation layer and the waterproof and vapor-proof layer, and moisture is allowed to enter the interior of the pipeline from the empty layer; the water-proof and vapor-proof layer is used for pumping water and discharging the water to the outside through a negative pressure pumping device, dry air is introduced, the humidity of the empty layer and the wall body is reduced, the dry state is maintained, a flow guide plate used for preliminary moisture prevention is fixedly arranged on one side of the water-proof and vapor-proof layer, and a fixing box used for collecting permeated water is clamped to the bottom of the flow guide plate.

The utility model discloses a built-in fixing structure of a bus handrail base, and belongs to the technical field of bus interior decoration devices. The device comprises a handrail arranged in a carriage; the armrest is characterized in that a cavity is arranged at the connecting part of the lower bottom of the armrest and the carriage bottom plate; an inner joint is mounted in the cavity; a positioning hole is formed in the position, opposite to the inner connector, of the compartment bottom plate. A positioning piece is arranged on the inner joint; one end of the positioning piece penetrates through the positioning hole and then is installed on the lower portion of the carriage bottom plate. The handrail base fixing structure effectively solves the problems that a traditional handrail base fixing structure used at present is prone to dust accumulation, inconvenient to clean and prone to loosening.

The invention relates to a post-treatment method for a mercury-based II-VI group nanocrystal with a protective layer formed by chemical oxidation, and solves the problems of poor stability and photoelectric property degradation of the mercury-based II-VI group nanocrystal caused by surface oxidation, ligand desorption and environmental sensitivity. An oxide protection layer with the thickness of 1-3 nm is formed on the surface of the nanocrystal, the long-term stability and the photoelectric property of the nanocrystal are improved, and the method comprises the specific steps of centrifugal purification of the nanocrystal, preparation of an oxidizing agent solution, controllable oxidation reaction, functional ligand surface modification and purification treatment. The oxidation layer is ensured to be compact and stable by accurately adjusting the concentration of the oxidant, the reaction temperature and the reaction time. According to the method, oxygen and moisture permeation is effectively blocked, surface defects are reduced, the quantum yield and the photoelectric property are improved, and the method is widely applied to the fields of post-treatment of mercury-based II-VI group nanocrystals and photoelectric devices.

The utility model provides a kind of multiple combination sealing type roller chain, belong to roller chain technical field.It includes pin shaft and respectively the outer chain plate of being set in the both ends of pin shaft, bushing is set in pin shaft, bushing both ends are respectively set with inner chain plate, roller is set in bushing, clearance fit is formed with lubricating portion between pin shaft and bushing, oil supply path is equipped in pin shaft with lubricating portion intercommunication, bushing both ends are respectively equipped with combination sealing assembly, combination sealing assembly includes the first sealing structure being arranged between bushing and outer chain plate, second sealing structure is also equipped between outer chain plate and inner chain plate outside the first sealing structure side.Lots of sealing structures form multiple sealing barrier in bushing end portion, ensure that can effectively block particle impurity and seawater penetration, can effectively prolong the retention time of lubricating oil, significantly improve the sealing effect and sealing life of bushing end portion.

The utility model discloses an aluminum honeycomb core composite board which comprises a composite board body, the composite board body is formed by combining an outer layer, a fireproof coating, a structure reinforcing layer, a first core layer, a first fireproof layer, a second fireproof layer, an inner layer, a waterproof layer, a second core layer and a bottom layer, the fireproof coating is fixedly connected to the lower surface of the outer layer, and the structure reinforcing layer is fixedly connected to the lower surface of the inner layer. Through the components, the composite board body is provided with multiple layers of fireproof and waterproof layers, ceramic treatment can be carried out at high temperature, a hard fireproof barrier is formed, double high temperature resistance can be achieved, flames and heat are prevented from permeating inwards, heat radiation can be reflected, and fire spreading can be delayed; the surface hydrophobicity of the composite board body can be high, the composite board body is resistant to rainwater corrosion, and the composite board body can still keep stable when exposed outdoors or in a humid environment for a long time.

The present application relates to the technical field of high polymer material, and particularly relates to a kind of nanoparticle alkali-resistant hydrophobic modifier.The nanoparticle alkali-resistant hydrophobic modifier is composed of 25-55 parts of skeleton resin, 15-45 parts of anchoring agent, 1-10 parts of reinforcing agent and 100-300 parts of solvent.The present application uses perfluoropolymer system, so that the modifier is resistant to temperature of 400 DEG C or above and strong alkali corrosion;After sintering, it forms homogeneous and firm combination with PTFE matrix, solving the problem of interface peeling.The modifier is particularly suitable for preparing sealing gasket for alkaline electrolytic cell in high-salt and high-humidity environment at sea, significantly improving the dimensional stability and service life of the gasket.

The utility model discloses a polyester film with heat resistance, which comprises a polyester film body, the polyester film body comprises a first polyester film layer, a heat-resistant layer and a second polyester film layer, the bottom surface of the first polyester film layer is bonded with the top surface of the heat-resistant layer through a first bonding layer, and the bottom surface of the second polyester film layer is bonded with the top surface of the heat-resistant layer through a second bonding layer. The polyester film is composed of a sandwich structure, namely the first polyester film layer, the heat-resistant layer and the second polyester film layer, the sandwich structure can improve the strength and durability of the film, meanwhile, permeation of substances such as oxygen and water vapor can be more effectively blocked, and therefore the heat-resistant polyester film has the beneficial effects that the heat-resistant polyester film has the good heat-resistant effect, and the service life of the heat-resistant polyester film is prolonged. The high-temperature-resistant polyester film has the advantages that the high-temperature-resistant polyester film is used for protecting packaged articles from being influenced by the outside, and meanwhile, the epoxy resin and the polyurethane adhesive are used as adhesives, so that the bonded polyester film has good high-temperature resistance, can absorb impact and vibration and reduce stress concentration during use, and has good weather resistance and aging resistance.

This invention discloses an ultra-high performance fiber-reinforced concrete and its preparation method, belonging to the field of concrete technology. By acid etching of high-silica glass fibers with sulfuric acid and nitric acid, the surface roughness of the fibers is increased, and a large number of active groups such as hydroxyl groups are introduced, providing reaction sites for subsequent dopamine grafting. This solves the problems of strong surface inertness and weak interfacial bonding between glass fibers and the concrete matrix. Compared with traditional concrete, the internal structure is highly dense, with high compressive strength and is not easily corroded by alkaline media. Furthermore, this invention forms a highly active adhesive coating on the fiber surface by covalently bonding the catechol groups of dopamine with the hydroxyl groups on the fiber surface. Simultaneously, the amino and phenolic hydroxyl groups of the dopamine coating act as bridges, enhancing the bonding force between the fiber and subsequent silanes and bentonite, significantly improving the interfacial compatibility between the fiber and the concrete matrix, and reducing the risk of interfacial debonding under stress.

The application discloses a surface heat treatment process for improving the strength of a mining metal roof beam and relates to the technical field of surface heat treatment, and comprises the following steps: preparation of a multi-element co-permeation agent; pretreatment of a substrate surface; boxing and sealing; gradient high-temperature chemical co-permeation; integrated cooling and quenching treatment; low-temperature tempering stress relief; post-treatment and detection. The application realizes the balance between high surface hardness and high core toughness by constructing a dense functional layer on the roof beam surface in situ through multi-element co-permeation and gradient heat treatment, and improves the service life of the roof beam under heavy load, wear and acidic corrosion environment in a mine.

This invention discloses a method for preparing a composite polypropylene material and its application in building materials, belonging to the field of polymer materials technology. The material is composed of homopolymer polypropylene, random copolymer polypropylene, polyethylene, TPV, toughening agent, modified glass fiber, etc. The preparation method involves mixing the raw materials and then extruding and granulating them using a twin-screw extruder. Compared with existing technologies, this invention achieves a balance between high strength, high toughness, and aging resistance by optimizing the formulation and process, significantly improving mechanical properties and durability, effectively blocking water molecule penetration, and extending service life. It provides high-performance polypropylene composite materials for the building materials field, especially suitable for hollow core slabs.

The present application relates to the technical field of chemical product processing, in particular to a low-gloss polyacrylate resin composition, a preparation method and application thereof, which comprises a modified polyacrylate resin solution, an epoxy-siloxane modifier, a vinyl trimethoxysilane oligomer, an organic metal catalyst, a viscosity regulator and a polymerization inhibitor; the ester bond in the modified polyacrylate resin is fixedly protected by the epoxy-siloxane modifier, and the ability of the epoxy-siloxane modifier is further enhanced by the vinyl trimethoxysilane oligomer, so that the problem that the gloss of the extinction type polyacrylate resin containing a bulky side group is irreversibly increased due to ester bond hydrolysis in a hot and humid environment is solved.

This invention discloses a large-area photo-chargeable aqueous zinc-ion battery, its preparation method, and its application. The method includes the following steps: Two pieces of glass with a transparent conductive layer coated on one side are taken. A positive electrode material is placed on the coated layer of one of the glass pieces. A glass fiber separator and a negative electrode material are sequentially covered on top of the positive electrode material. The other glass piece is then placed on top of the negative electrode material with its coated layer facing down. The positions of the two glass pieces are adjusted so that they are stacked alternately. Pressure is applied to the resulting stacked structure, and three sides are sealed with hot melt adhesive. After the hot melt adhesive has cured, electrolyte is injected into the unsealed side, and then this side is sealed again. The negative electrode of a diode is connected to the glass on the positive electrode side of the battery, and the positive electrode of the diode is connected to the glass on the negative electrode side of the battery, thus obtaining a large-area photo-chargeable aqueous zinc-ion battery. The battery of this invention has the advantages of high light utilization, stable charging, and low loss.

The invention relates to a method for coating a fluorine-containing base film on the surface of a cutter. The method comprises the following steps of: a, oil removal, degreasing and rust removal of the surface of the cutter; b, drying and dehydrating the surface of the cutter; c, coating the base membrane liquid; d, a micro-permeation process of the base membrane liquid; and e, curing the base film liquid.

The utility model belongs to the technical field of medical auxiliary equipment, and discloses an endoscopic examination pad which comprises a bottom layer, a middle layer and an uppermost layer which are arranged in sequence, the bottom layer and the middle layer are rectangles with the same shape, the bottom layer is a pad body, the middle layer comprises a bearing area, a flow guide area and a dirt collecting area, and the uppermost layer is arranged in the bearing area. The bearing area and the dirt collecting area are respectively positioned in two diagonal areas of the pad body, and the flow guide area is positioned in an area between the bearing area and the dirt collecting area; a raised waterproof sponge strip is arranged at the joint of the bearing area and the flow guide area; the flow guide area is provided with a plurality of flow guide grooves extending from the waterproof sponge strip to the sewage collection area; the uppermost layer is located above the dirt collecting area and completely coincides with the dirt collecting area, the right-angle side of the dirt collecting area is connected with the uppermost layer, and the dirt collecting area and the uppermost layer form a conical structure with an opening facing the flow guide area. A large amount of dirty liquid can be absorbed through the conical structure, the dirty liquid can be separated from a patient through the waterproof sponge strip, and the patient is prevented from being infected by the dirty liquid.

This invention relates to the field of brass material technology, specifically a high-strength, high-toughness brass material and its preparation method. A porous oxide film is pre-formed on the brass surface through plasma electrolytic oxidation. A double-bonded silver-loaded graphene oxide-doped oxide film is then constructed on the brass surface. A photocurable sealing coating is then prepared for sealing. In the photocurable sealing coating, double-bonded silver-loaded graphene oxide and modified MXene are introduced as fillers. MXene is first thiolated with 3-mercaptopropyltriethoxysilane, and then grafted with a double-bonded dibenzimidazole ring derivative via photo-clicking to obtain modified MXene. A vinyl-terminated polyurethane is used as a crosslinking agent, and a complex crosslinking network is constructed using a blend of o-phenylphenoxyethyl acrylate, butyl acrylate, glycidyl methacrylate, and octadecyl acrylate as acrylic monomers. A diluent and solvent are introduced to extend the service life of the brass material.

The invention discloses a composition for a breathable waterproof coating, the coating and a preparation method of the coating, belongs to the technical field of building coatings, and aims to solve the problem that a coating is bubbled and stripped due to low water vapor permeability of an existing waterproof coating. The composition is prepared from the following raw materials in parts by weight: 35 to 45 parts of acrylic emulsion, 0.1 to 0.3 part of cross-linking agent, 5 to 10 parts of diatomite, 0.2 to 0.5 part of wetting agent and 0.1 to 0.3 part of carbon nano tube. The preparation method comprises the step of sequentially dispersing and mixing the acrylic emulsion, the defoaming agent, the cross-linking agent, the water, the preservative, the diatomite, the heavy calcium carbonate, the wetting agent, the carbon nano tube, the precipitated barium sulfate and other raw materials at a specific rotating speed. The coating keeps excellent waterproof performance, tensile strength and flexibility, meanwhile, the water vapor permeability is remarkably improved, and the coating has good constructability and durability and is suitable for building waterproof engineering with high requirements for air permeability.

The invention relates to the technical field of food, in particular to a preparation method of high-protein wheat germ nutritional compound granules. The method comprises the following steps: firstly, spraying chitosan on the surface of dry wheat germ powder, and then reducing the moisture content and inhibiting the enzyme activity through microwave treatment; the preparation method comprises the following steps: preparing wheat germ powder, then spraying sodium alginate to obtain stabilized wheat germ powder, finally, compounding the stabilized wheat germ powder with other nutritional ingredients, and carrying out high-pressure homogenization and spray drying to prepare the electuary. Through chitosan coating and microwave treatment, the nutrient retention rate and the storage stability of the wheat germs are remarkably improved, meanwhile, nutrient component loss and hidden danger of chemical additives in a traditional method are avoided, and an efficient and safe solution is provided for industrial application of the wheat germ nutrient compound granules.

The utility model relates to the related technical field of Bluetooth earphones, in particular to a sports waterproof Bluetooth earphone, which comprises an earphone main body, a waterproof coating is coated on the surface of the earphone main body, a diversion trench is arranged on one side of the earphone main body close to a sound outlet cylinder, and a waterproof mechanism is arranged on one side of the surface of the earphone main body. According to the sports type waterproof Bluetooth earphone, the nano hydrophobic coating forms a nano-scale micropore and a concave-convex surface through a bionic lotus leaf structural design, so that liquid drop rolling instead of infiltration is realized, and water molecule penetration is effectively blocked, so that when the waterproof coating is uniformly coated on the surface of the earphone main body, sweat and rainwater erosion can be prevented, the service life of the earphone main body is prolonged, and the service life of the earphone main body is prolonged. The diversion trench reduces oxidation corrosion of metal contacts (such as a charging interface) and prolongs the service life of the earphone main body by rapidly discharging salt-containing sweat or seawater, and meanwhile, the waterproof mechanism can perform waterproof treatment on the charging interface to prevent liquid from permeating into the charging interface to influence the service life of the earphone main body.