224results about How to "Improve adhesion strength" patented technology

The invention discloses a fingerprint-resistant coating of a chromium-plated part and a preparation method of the fingerprint-resistant coating, and belongs to the technical field of metal material plating surface treatment. Comprising the following steps: carrying out hydrolysis reaction on an organic siloxane coupling agent to obtain silane coupling agent hydrolysate; mixing and reacting the silane coupling agent hydrolysate, levodopa, an EDC hydrochloride reagent and a DMAP reagent to obtain modified levodopa; soaking the pretreated chromium-plated part in modified levodopa, taking out the pretreated chromium-plated part, soaking the pretreated chromium-plated part in a methacrylate solution, and polymerizing to obtain a polymethacrylate-poly-levodopa-chromium-plated part; and the polymethacrylate-poly-levodopa-chromium-plated part is soaked in a silver salt solution, and the fingerprint-resistant coating of the chromium-plated part is obtained. According to the method, the poly-levodopa adhesion layer is constructed on the surface of the chromium-plated part according to the molecular bionics principle, then the poly-levodopa is further polymerized to generate the polymethacrylate protection layer, and finally the fingerprint resistance of the chromium-plated part is improved through further coordination crosslinking of the silver salt solution.

The invention discloses a multi-layer surface paint treatment process for an enameled wire, and relates to the technical field of enameled wire production. A multi-layer surface paint treatment process for an enameled wire comprises the steps of unwinding and stretching, annealing and softening, paint curing, inspection and winding and the like, in the paint curing process, a wire can be painted, baked and cooled through a paint coating mechanism, a drying oven and a cooling box in a paint coating device, and the surface of the enameled wire is coated with paint. And then the surface paint is conveyed to the feeding side of the painting mechanism again through the guide mechanism, so that a plurality of painting and curing procedures can be repeatedly carried out, and the coating of multi-layer surface paint is realized. Only one painting device is needed in the multi-layer surface paint coating process of the whole enameled wire, so that the requirement of production equipment for producing the enameled wire with the multi-layer surface paint on a production site can be reduced.

The invention provides a fiber dressing for promoting wound healing and a preparation method and application thereof, and belongs to the technical field of biological materials. The shell of the fiber dressing contains the first medicine for promoting polarization of macrophages, and the first medicine can promote polarization of macrophages at normal and diabetic wound surfaces from M1 type to M2 type; a shell substrate is a mixture of hydrophilic and hydrophobic polymers, so that painless adhesion and stripping of a wound surface can be realized by absorbing seepage and spraying non-irritant normal saline on the wound surface, and secondary injury of the wound surface is reduced; an inner core contains a second medicine and a third medicine which are used for inducing death of M1 type macrophages, so that wound inflammatory response can be reduced, wound bacteria can be killed, wound infection degree can be reduced, and wound healing can be accelerated; the core matrix is a mixture of hydrophilic and hydrophobic polymers with good biocompatibility, can provide mechanical support for the fiber dressing, and provides a slow release effect for the two substances in the core. By controlling the composition of the inner core and the shell, the healing of normal wounds and diabetic wounds can be effectively promoted.

The invention discloses riboflavin photodynamic antibacterial hydrogel for a diabetes wound dressing as well as preparation and application of the riboflavin photodynamic antibacterial hydrogel, and belongs to the technical field of biomedical materials. The hydrogel is prepared from carbomer 941, rhizoma bletillae polysaccharide and carboxymethyl chitosan through physical and chemical bi-crosslinking, glutaraldehyde and carboxymethyl chitosan are added to form dynamic imine bonds, and the stability and adaptability of the hydrogel are enhanced. Meanwhile, the photosensitizer riboflavin is introduced, so that the hydrogel is endowed with photodynamic sterilization characteristics, efficient antibiosis is realized, and rapid healing of diabetic wounds is promoted. The hydrogel has excellent wound environment adaptability and adhesion performance, and is suitable for complicated wound surfaces of diabetes mellitus. The successful research and development of the invention provide reference for the development of novel photodynamic wound dressings, have wide application prospects, provide better treatment choices for diabetics, and are helpful for accelerating wound healing, reducing infection risks and improving the life quality of patients.

The invention discloses a self-gelation porous hemostatic micro-tablet as well as a preparation method and application thereof. Belongs to the technical field of hydrogel. The method comprises the following steps: firstly, preparing two raw materials of quaternized chitosan grafted gallic acid and oxidized hyaluronic acid in a sponge state by a freeze-drying method, and then respectively crushing the two raw materials into micro-tablets by using a crusher; after the size of the microchip is controlled through a screen, the two kinds of microchips are mixed, and the porous hemostatic microchip is prepared. The hemostatic microchip integrates three advantages of sponge, hydrogel and powder, and can realize rapid hemostasis and efficient wound healing. The hemostatic microchip has a large specific surface area and excellent hydrophilicity, can rapidly absorb blood, and realizes self-gelation through electrostatic interaction and Schiff base crosslinking, so that a compact and porous hydrogel adhesive is formed, and the porous hemostatic microchip has excellent mechanical properties, adhesive strength and ultrahigh bursting pressure, and can be used as a hemostatic material for medical application. And meanwhile, the hydrogel also has the characteristics of biocompatibility, biodegradability, procoagulant property and antibacterial property.

The invention discloses a high-performance adhesive for automobile glass process protection, and relates to the technical field of adhesives, and the high-performance adhesive is prepared from the following raw materials: hyperbranched perfluoropolyether urethane acrylate oligomer, methyl vinyl silicone rubber, isocyano ethyl methacrylate, hexahydro-1, 3, 5-tris (hydroxyethyl)-s-triazine, 2, 4, 5-trimethyl-1, 3-pentanediol monoisobutyrate, 2, 4, 5-trimethyl-1, 3-pentanediol monoisobutyrate, 2, 4, 5-trimethyl-1, 3-pentanediol The coating is prepared from the following raw materials: 2, 6-trivinyl boroxane, methyl vinyl di (diacetylketoxime) silane, N-vinyl caprolactam, 2-(1-propylene-2-yl) benzo [D] oxazole, 3, 3 '-diamino-4, 4'-difluorodiphenyl sulfone, 3-(1, 1-difluoro-2-propylene-1-yl)-2 (1H)-quinoxalinone, a diluent, a photoinitiator, a catalyst and a defoaming agent. The adhesive is high in adhesive strength, excellent in high temperature resistance, good in adhesive removing performance and safe and environment-friendly to use.

The invention relates to solvent wiping resistant UV ink and a preparation method thereof, and belongs to the technical field of ink. The UV ink is prepared from the following components: 15 to 20 weight percent of pigment, 1.9 to 2.4 weight percent of photoinitiator, 5.5 to 7.2 weight percent of organic silicon additive, 1.5 to 2 weight percent of wetting dispersant, 1.2 to 1.6 weight percent of flatting agent, 1 to 1.3 weight percent of defoaming agent, 1.4 to 1.8 weight percent of covering agent, 16 to 22 weight percent of cosolvent and the balance of acrylate binder, the organosilicon auxiliary agent contains multiple silicon chains, quaternary ammonium structure in-situ modification reduces interfacial tension between the silicon chains and an acrylate matrix and facilitates migration and spreading of the silicon chains to the surface of the ink layer, and the quaternary ammonium structure promotes photocuring crosslinking of acrylate, so that a silicon-rich high-crosslinking protective layer is formed on the surface of the ink layer, and swelling and friction loss of a solvent are effectively resisted.

The invention discloses a double transition metal / chitosan-based carbon aerogel composite material and a preparation method and application thereof.The method comprises the steps that a nitrogen source and transition metal salt are added into a hydrochloric acid solution of chitosan, stirred, dissolved and evenly dispersed to prepare a mixed solution, the mixed solution is subjected to freeze drying, and the double transition metal / chitosan-based carbon aerogel composite material is obtained. Chitosan aerogel containing transition metal and a nitrogen source is prepared; the transition metal salt is any two of ferric salt, cobalt salt and nickel salt; the chitosan aerogel containing the transition metal and the nitrogen source is placed in a methanol solution of 2-methylimidazole, after vibration treatment and drying, the chitosan aerogel is placed in a nitrogen atmosphere to be subjected to heat treatment, and the double-transition-metal / chitosan-based carbon aerogel composite material is prepared. The preparation method is simple and reasonable in design, the prepared material has good specific surface area and porosity, the formed metal-nitrogen double active center effectively improves the adsorption performance of the material, and the material has good catalytic performance.

The invention discloses an ultralow-temperature-resistant urea-bond-containing polyurethane adhesive and a preparation method thereof, and relates to the technical field of adhesives, and the ultralow-temperature-resistant urea-bond-containing polyurethane adhesive is characterized by comprising the following components in parts by weight: 50-65 parts of urea-bond-containing isocyanate prepolymer; 10 to 20 parts of isocyanate; 0.05 to 1 part of a composite catalyst; 0.2 to 1.5 parts of a latent curing agent; 0.05 to 2 parts of a water absorbent; 5-10 parts of a diluent; the invention has the advantages that the preparation process is simple, interlayer lamination can be carried out at low temperature, the curing speed after bonding is high, the ultra-low temperature resistance and hydrolysis resistance are very good, and the problems of slow curing, low peel strength, ultra-low temperature brittleness and the like of the existing product can be effectively solved.

The invention relates to a super wear-resistant tungsten carbide composite TiSiN / DLC / t-ZrO2 coating technology and a preparation method thereof, and aims to improve the performance of equipment under extreme working conditions. By combining a novel mixed TiSiN / DLC / t-ZrO2 coating technology, the hardness and wear resistance of the coating are remarkably improved, the fracture toughness is enhanced, the brittleness is reduced, and the impact resistance is improved. The preparation method comprises the following specific steps: preparing alpha-WC nano powder and t-ZrO2 powder, optimizing the dispersity and uniformity of the powder by adopting ultrasonic treatment and fine grinding, then adding a DLC layer on a TiSiN intermediate layer, and finally coating the surface of a base material with the powder through a cold spraying technology. Tests show that the prepared coating has excellent performances in the aspects of hardness, fracture toughness, wear resistance, high-temperature stability and the like, meets the requirements of high-performance materials, and is suitable for being applied in high-temperature, high-pressure and corrosive environments.

The invention relates to the technical field of food packaging, and discloses a flour packaging bag based on single material compositing, which comprises a middle-sealed folding bag and an eight-edge-sealed folding packaging bag, and comprises a first bag body and a first bag side applied to the middle-sealed folding bag, one side edge of the bag body is connected end to end and then is sealed to form a middle sealing part, and the other side edge of the bag body is sealed to form an eight-edge-sealed folding packaging bag. The first bag body and one end face of the bag side are connected and then are subjected to edge sealing to form a transverse sealing part, the position, located on the transverse sealing part, of the first bag body is coated with an adhesive tape, and after middle sealing is completed, the middle sealing part is attached to the adhesive tape. By adopting the unstretched PE film composite design, the tensile strength, the heat sealing performance and the tear resistance of the packaging bag are remarkably improved, the heat sealing temperature is as low as 120 DEG C or below, and the bag breaking risk is reduced; the method is suitable for complex bag shape processing; through the environment-friendly solvent-free adhesive and the dry type compound technology, the production efficiency is improved, the cost is reduced, meanwhile, efficient recycling and environment-friendly performance are achieved, and the packaging requirement of heavy objects is met.

The invention relates to the technical field of cable manufacturing, in particular to a double-core double-layer cable manufacturing process and a double-core double-layer cable production device, and adopts the technical scheme that two conductor materials are respectively drawn by using a drawing machine, and an insulating material is coated outside two conductor wire cores by using an extruding machine through an extruding process; putting the cable wrapped with the first insulating layer into a coarsening and grooving device, forming a threaded groove in the surface of the first insulating layer of the cable by the coarsening and grooving device, then pricking uniform small holes in the surface of the first insulating layer, coarsening the surface of the first insulating layer, and extruding an outer insulating material on the coarsened surface of the first insulating layer by using the extruder again, and finally, winding the finished cable on a reel, and carrying out marking and packaging. The softening, slotting, coarsening and cleaning processes are added between the cable first insulation layer extrusion process and the cable second insulation layer extrusion process, so that the second insulation layer is more firmly attached to the first insulation layer, and the risk of separation is reduced.

The invention belongs to the technical field of amorphous / crystalline heterojunction catalysts, and discloses an amorphous / crystalline heterojunction catalyst for hydrogen evolution reaction and a preparation method thereof, the preparation method comprises the following steps: S1, selecting foamed nickel as a substrate, and performing pretreatment; s2, preparing a high-purity Ni target and a high-purity Zr target as magnetron sputtering target materials for later use; s3, the foamed nickel substrate pretreated in the step S1 is installed on a substrate table of magnetron sputtering equipment, then the Ni target and the Zr target in the step S2 are installed in a target seat of a magnetron sputtering coating machine, a cavity is vacuumized, and argon is introduced to enable the pressure in the magnetron sputtering coating machine to be stabilized at the working pressure; s4, sputtering a Ni target and a Zr target by using direct current to obtain an amorphous / crystalline heterojunction NiZr oxide catalyst; the amorphous / crystalline heterojunction catalyst is prepared by using a magnetron sputtering method, so that the activity of the HER catalyst is improved, and the preparation method is simple and convenient to operate.

The flotation recovery method comprises the following steps: carrying out ore grinding and dissociation treatment on raw copper ore, then carrying out roughing, and grading roughing tailings to obtain three-fraction ore pulp products of + 200 meshes, 200-400 meshes and-400 meshes; the + 200-mesh ore pulp product is subjected to coarse grain flotation, a combined collecting agent of disulfide diisopropyl xanthate and isopropyl xanthate is adopted for recycling coarse grain copper minerals, and obtained rough concentrate is returned to the ore grinding operation; carrying out fine particle flotation on the ore pulp product with the size of-400 meshes by adopting a fine particle flotation collecting agent, and combining obtained rough concentrate with copper roughing rough concentrate for concentration; ore pulp products of 200-400 meshes are directly used as tailings. According to the method, the lost coarse and fine copper minerals in the ore pulp can be intensively recovered, and the copper flotation recovery rate can be increased.

The invention belongs to the technical field of surface treatment, and particularly discloses a copper foil anti-oxidation surface treating agent and a preparation method and a use method thereof, and the copper foil anti-oxidation surface treating agent is composed of the following components by mass: 0.5-5% of a silane coupling agent; 0.1 to 5.0 percent of organic silicon resin; 0.1 to 2.0 percent of benzotriazole; 0.5-5% of ammonia water; 2-5% of ethanol; and the balance of deionized water. Before use, the anti-oxidation surface treating agent and water are mixed to obtain surface treating fluid, and then the surface treating fluid is applied to the surface of the copper foil in a spraying or soaking mode. The copper foil anti-oxidation surface treating agent disclosed by the invention is environment-friendly, safe, simple in preparation process and low in cost, and has good anti-oxidation performance and anti-stripping performance.

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 relates to the technical field of composite biological coatings. Specifically, the invention relates to a hydrophobic composite layer on a medical degradable magnesium alloy matrix and a preparation method of the hydrophobic composite layer. In the preparation method, firstly, a porous ceramic oxide layer is formed on a magnesium alloy matrix through micro-arc oxidation treatment, so that the corrosion rate of the magnesium alloy is reduced; then, a strontium-doped hydroxyapatite layer is prepared on the surface of the micro-arc oxidation layer by using a chemical deposition method, so that the biocompatibility of the magnesium alloy is improved; and finally, dipping and pulling the magnesium alloy subjected to micro-arc oxidation and chemical deposition treatment in a polylactic acid solution containing nano-hydroxyapatite for one time or multiple times, so as to form a hydrophobic polymer layer. According to the hydrophobic composite layer prepared by the method, the corrosion resistance and the biocompatibility of the magnesium alloy are improved at the same time. The invention also relates to a magnesium alloy implant article comprising the hydrophobic composite layer.

The invention discloses wear-resistant anti-aging organic silicon modified asphalt for a fog sealing layer and a preparation method of the wear-resistant anti-aging organic silicon modified asphalt, and relates to the technical field of road engineering. The wear-resistant anti-aging organic silicon modified asphalt comprises the following raw materials in parts by weight: 100 parts of petroleum asphalt, 20-25 parts of FCC oil slurry, 40-50 parts of an organic silicon polymer resin composition, 6-12 parts of modified graphene oxide, 3-6 parts of an initiator, 10-15 parts of an organic stabilizer, 4-6 parts of a suspending agent and 1-2 parts of an ultraviolet light absorber, the prepared organic silicon modified asphalt can improve the regeneration reduction and infiltration capacity of a fog sealing layer material, increase the adhesive force and wear resistance of a protective film and prolong the service life of the fog sealing layer material.

The invention discloses a recoverable mussel-imitating bio-based epoxy resin adhesive and a preparation method thereof, and is characterized in that the recoverable mussel-imitating bio-based epoxy resin adhesive is prepared according to the following steps: (1) reacting a bio-based epoxy monomer with an aldehyde compound containing a phenolic hydroxyl group under the action of a catalyst to obtain bio-based epoxy polyaldehyde; and (2) reacting the prepared bio-based epoxy polyaldehyde, diamine and a mussel-imitating aldehyde compound to obtain the mussel-imitating bio-based epoxy resin adhesive. The cross-linking density and the network rigidity are greatly improved, and the mussel-imitated aldehyde group compound contains a catechol structure, can form non-covalent acting forces such as hydrogen bonds, metal coordination, cations-pi and the like with various surfaces, and can be tightly adhered to the surfaces of different objects. The catechol structure is introduced into the dynamic covalent bond cross-linked bio-based epoxy resin, and the high-performance bio-based epoxy resin adhesive which is high in adhesion strength and can be plasticized and recycled is obtained.

The invention discloses a silicon-modified acrylic pressure-sensitive adhesive, a pressure-sensitive adhesive tape and a preparation method of the silicon-modified acrylic pressure-sensitive adhesive. The pressure-sensitive adhesive tape comprises an adhesive tape main body and release film layers arranged on two surfaces of the adhesive tape main body, the adhesive tape main body comprises a first silicon modified acrylic pressure-sensitive adhesive layer, a first priming coat, a butyl rubber elastomer layer, a second priming coat and a second silicon modified acrylic pressure-sensitive adhesive layer which are arranged in sequence, and the priming coat is directly coated on the butyl rubber elastomer layer; the silicon-modified acrylic pressure-sensitive adhesive layer is adhered and superposed through the priming coat coated on the butyl rubber elastomer layer, and the priming coat has good adhesive force with the butyl rubber elastomer layer, can be used as a connection medium between the silicon-modified acrylic pressure-sensitive adhesive layer and the butyl rubber elastomer layer, and is integrally thin, so that the adhesive force between the priming coat and the butyl rubber elastomer layer is good. The shock-absorbing adhesive has excellent bonding strength, shock-absorbing effect and shock-absorbing performance, and is strong in shock-resisting and buffering capability.

The invention relates to the technical field of fabrics, in particular to an anti-pilling skin-friendly fabric and a preparation method thereof. The preparation method comprises the steps that cashmere and bamboo fibers are adopted as raw materials to prepare a fabric base, the fabric base is soft in touch feeling and has excellent skin-friendly performance, after the fabric base cloth is subjected to fulling milling treatment, the fabric base cloth is soaked into a fabric which is prepared from 2-ethylhexyl acrylate, hydroxyethyl methylacrylate, alkenyl modified nano-zinc oxide, 5 ', 5-diallyl-2, 4, 6-trimethyl-1, 3-pentanediol monoisobutyrate, 2, 3, 5-trimethyl-1, 3-pentanediol padding treatment is carried out in a finishing agent emulsion prepared from 2, 2 '-biphenol, vinyl silicone oil, an emulsifier, a photoinitiator and deionized water, and then polymerization crosslinking is carried out under ultraviolet irradiation to form a resin film layer, so that the anti-pilling effect of the fabric is further improved; wherein the anti-pilling performance can be improved through fulling milling treatment, the antibacterial performance of the fabric can be effectively improved through addition of nano-zinc oxide and 5 ', 5-diallyl-2, 2'-biphenol, and the softness of the fabric can be effectively improved through addition of silicone oil.

The invention relates to the technical field of rare earth treatment, and in particular to a method for controlling the amount of rare earth added to a rare earth low alloy high-strength and tough steel. The invention obtains an optical image of a composite rare earth inclusion formed by interaction between aluminum oxide and manganese sulfide after adding a rare earth solution through testing. The optical image of the composite rare earth inclusion can accurately determine whether the anti-corrosion performance of the high-strength and tough steel meets the standard, thereby improving the accuracy of the amount of rare earth added to the high-strength and tough steel. The image of the segregated interface of rare earth ions, lanthanum ions and cerium ions can determine whether the wear resistance of the high-strength and tough steel meets the standard, further improving the accuracy of the amount of rare earth added to the high-strength and tough steel. According to the determined amount of rare earth added, an actual rare earth ion penetration quenching and tempering treatment operation is performed on the alloy steel, thereby further improving the accuracy of the amount of rare earth added to the high-strength and tough steel.

The utility model belongs to the technical field of sliding door structures, and discloses a door leaf structure of a sliding door, which comprises an upper rail, a lower rail, a smooth rabbet and a hooked rabbet, and is characterized in that the smooth rabbet and the hooked rabbet are respectively provided with a first glass mounting groove and at least one first anti-collision strip mounting groove, and the first glass mounting grooves and the first anti-collision strip mounting grooves are oppositely arranged; two side groove walls of the first glass mounting groove are symmetrically and respectively provided with at least two first clamping strips which extend towards the inner side in parallel, and at least two first glue solution accommodating grooves are formed between the adjacent first clamping strips and between the first clamping strips and the groove walls; and an anti-collision strip is mounted in the first anti-collision strip mounting groove. According to the utility model, redundant glass cement can be accommodated in the groove, so that the glue solution can be effectively prevented from overflowing, the adhesive strength between the glass and the section bar is increased, the door opening space can be enlarged, and the aesthetic feeling and the passing convenience are improved.

The invention relates to biological glue as well as a preparation method and application thereof. The biological glue comprises the following components: tannic acid, gelatin and polyvinylpyrrolidone, the polyvinylpyrrolidone comprises a mixture of polyvinylpyrrolidone K30, polyvinylpyrrolidone K60 and polyvinylpyrrolidone K90, and the polyvinylpyrrolidone K30 is a mixture of polyvinylpyrrolidone K60 and polyvinylpyrrolidone K90. The biological glue has good biocompatibility and high-strength adhesiveness.

The invention relates to a lingual orthodontic appliance, and relates to the technical field of medical instruments, the lingual orthodontic appliance comprises a bottom plate, a support body is arranged on the surface of one side of the bottom plate, a groove is axially formed in the middle of the support body, a cover plate is arranged above the support body, the cover plate is slidably connected with the support body, the cover plate closes or breaks away from the groove through sliding, and the upper surfaces of the cover plate and the support body are arc-shaped surfaces. A mounting hole is formed in the middle of the support body, a lock cylinder is inserted into the mounting hole, a groove is formed in the middle of the upper end of the lock cylinder, a gourd-shaped clamping groove is formed in the middle of the bottom face of the cover plate, the upper end of the lock cylinder extends into the clamping groove, and a groove is formed in the middle of the upper end of the lock cylinder. The oral cavity corrector has the advantages that the influence on foreign body sensation in the mouth of a patient is small, meanwhile, oral cavity sanitation can be guaranteed, the overall structural strength of the corrector is improved, and the correction effect is improved.

Disclosed is a method for producing an anti-adhesion film. The method for producing an anti-adhesion film may include: a discharge step of separately electrospinning a biodegradable polymer solution filled in a first syringe and a crosslinking agent solution filled in a second syringe; and a film forming step of forming an anti-adhesion film by crosslinking of the biodegradable polymer by contact between the biodegradable polymer solution discharged in the form of fibers in the discharge step and the crosslinking agent solution discharged in the form of droplets in the discharge step.

A negative electrode for a rechargeable lithium battery and a rechargeable lithium battery including the same are provided. The negative electrode includes: a negative electrode current collector including a carbon layer and a silicon layer, the carbon layer including a first porous substrate and a carbon-based material present inside the first porous substrate, and the silicon layer including a second porous substrate and a silicon-based negative electrode active material present inside the second porous substrate; and a negative electrode active material layer disposed on a surface of the negative electrode current collector and including a negative electrode active material.

The invention belongs to the technical field of copper ore beneficiation, and particularly relates to a method for improving the flotation separation efficiency of micro-fine particle malachite. The method for improving the flotation separation efficiency of the micro-fine particle malachite comprises the following steps that quartz ore powder, malachite ore powder and water are mixed according to the mass ratio of 5: 1: (15-40), and first ore pulp is obtained; and a collecting agent is added into the first ore pulp, the final concentration of the collecting agent is made to range from 50 mg / L to 240 mg / L, and second ore pulp is obtained. Inorganic acid is added into the second ore pulp, flotation is conducted, and copper concentrate is obtained. Wherein the collecting agent is obtained by mixing a mixture of fatty acid, fatty alcohol-polyoxyethylene ether and polyethylene glycol according to the mass ratio of (70-82): (2-10): (8-28). The inorganic acid is selected from any one of sulfuric acid, hydrochloric acid and nitric acid. The mass concentration of the inorganic acid is 5%-25%, and 0.1 mL-0. 7mL of the inorganic acid is added into each liter of ore pulp. According to the method, the separation efficiency of the micro-fine particle malachite and the quartz is remarkably improved, and the copper recovery rate of the copper concentrate reaches 85.14%-86.6%.

The utility model relates to the technical field of building crack repairing devices, in particular to an anti-seepage structure for basement crack repairing, which comprises a base, a storage barrel, a crack cleaning device and a stirring device, moving wheels are mounted at four corners of the bottom end of the base, and the storage barrel is mounted at one end of the top wall of the base through a supporting block. The crack cleaning device comprises a dust collection barrel, a suction head and an electric telescopic rod, the dust collection barrel is installed at one end of the top wall of the base, two sets of symmetrically-designed fixing plates are installed on the side wall of the side, away from the storage barrel, of the base, sundries and water in cracks are cleaned, and it is ensured that the interiors of the cracks are dry and clean; according to the crack repairing device, dust near cracks can be cleaned, the cleanliness of the peripheries of the cracks is guaranteed, then the device is moved, materials are conveyed to the discharging head from the material storage barrel, and the cleaned cracks are repaired.

The invention relates to a cell grid line transfer printing device and method. The device comprises an unwinding assembly and a winding assembly and is used for conveying the patterned transfer printing film. The visual inspection assembly is used for acquiring position information of the film and the battery piece; a carrying platform of the pasting bearing platform is used for bearing the battery piece and is driven by a first moving part to realize horizontal movement and movement perpendicular to a film surface so as to finish alignment and pasting; and the pressing roller assembly comprises a heating roller, a first temperature control part used for accurately controlling the temperature and a pressure adjusting part used for adjusting the pressure so as to complete hot pressing transfer printing. The device can also comprise a movable heating plate for preheating the film, a carrying table temperature control part for preheating the battery piece, and a vacuum adsorption and liftable carrying table for fixing the battery piece. The corresponding method comprises the steps of battery piece feeding and alignment, vertical attachment, heating and rolling and base film removal, and can comprise the step of preliminary pressing, and the alignment precision, the hot-pressing uniformity and the production efficiency of transfer printing can be improved.