94results about How to "Good hydrophobicity" patented technology

The invention discloses an outdoor electric-insulation modified epoxy resin composition which comprises an epoxy resin, a curing agent, a curing accelerator and an inorganic filler. The outdoor electric-insulation modified epoxy resin composition has the advantages of high weather resistance, favorable hydrophobicity, high volume resistivity, high tracking resistance, high arc resistance, low thermal expansivity and the like, and can be used for manufacturing suspension insulators for alternating current transmission lines as well as umbrella skirts of cross arms and other outdoor insulation parts. Compared with the silicon rubber umbrella skirt, the umbrella skirt prepared from the composition can prevent birds from damage, resist line walking trampling, avoid shipping damage and the like.

The invention discloses a preparation method of a titanium dioxide superhydrophobic film, which comprises the following steps: constructing a micron-sized dot matrix coarse structure on a titanium dioxide film surface by a photosensitive sol-gel micro-machining technique, and carrying out chemical modification on the titanium dioxide film surface subjected to micro-pattern coarsening by using 1H,1H,2H,2H-perfluorooctyl trichlorosilane to obtain the superhydrophobic titanium dioxide film. By regulating the sol proportioning and dual-beam laser interference fringe width, the size of the micron-sized dot matrix coarse structure on the titanium dioxide film surface can be effectively regulated, thereby preparing the titanium dioxide films with different hydrophobicities. The prepared film surface coarse structure has the advantages of high regularity, excellent hydrophobicity, simple technique and favorable repetitiveness, and is easy to regulate.

The invention discloses a method for recovering chrome by the fast alkali precipitation of chrome tannage waste fluid, belonging to the clean production technology and recycling technology in the technical field of leather production. After the collection of chrome tannage waste fluid in the invention, the solid impurities are removed by filtering, with the temperature adjusted, magnesium oxide or other alkali matters are added; and after the full stirring and alkalization, little polyacrylamide or other flocculants are added for fast precipitation to remove supernatant liquor; and chromic hydroxide precipitate is obtained after further removing the water of the underlayer flocculent precipitate with a centrifuger. With the adoption of the method, the concentration of dichromium trioxide in the waste fluid can reduce to below 0.05g / l from 2-4g / l, the removal rate reaches over 97 percent, and the addition of the flocculants can realize the fast precipitation of chromic hydroxide in 20 minutes, the precipitation volume is lower than 15 percent of the total volume, and the precipitate has good hydrophobic nature and can be recovered conveniently. The method provides a new way for the precipitation and recycling of waste chrome liquor in a tanyard.

The invention discloses a compound sound insulation-absorption barrier board, comprising a front panel, a rear panel and a core material fixed between the front panel and the rear panel in a bonding manner, wherein, the core material is arranged in a strip shape, and the fiber direction of the core material is vertical to the front panel and the rear panel; multi-tongue rabbets are arranged at the two sides of the compound sound insulation-absorption barrier board at the joint of the front panel and the rear panel and can be spliced mutually; the front panel is a perforating panel; micropores are distributed on the perforating panel, wherein, the perforated rate of the micropores is more than 3% to 30%; the porosity of the core material is 97-98.4%; the average diameter of the fiber is 5-6 micrometers; the fiber length is 150-200 micrometers; and the noise enters into the core material through the micropores and is absorbed along the fiber direction of the core material. The compound sound insulation-absorption barrier board disclosed in the invention has the advantages of absorbing the noise in the environment, simultaneously insulating the noise, and avoiding the influence of the noise to the surrounding environment.

The invention provides a silicon-free hair washing and bathing composition suitably used by children and a preparation method thereof. Raw materials of the hair washing and bathing composition comprises a silicon-free conditioning component, a mild surfactant, a thickening agent, an anticorrosive agent, an esterifying agent, an acid-base regulator and water. The hair washing and bathing composition does not contain silicone oil, and is suitably used by the children; the silicon-free conditioning component added in the silicon-free hair washing and bathing composition can be adsorbed on the surface of hair with negative charges through a synergistic effect of a cationic polymer; a structural hydrophobic carbon chain (octadecyl) can exogenously supplement natural 18-MEA (18-Methyl Eicosanoic Acid) that the outermost layer of a hair scale of the hair loses; the better hydrophobicity is provided for the hair; therefore, the combing performance is improved.

The invention relates to a transparent super-hydrophobic film and a preparation method and application thereof. The transparent super-hydrophobic film combines ultrathin property, ultra-transparent property and extremely good super-hydrophobicity, the thickness of the transparent super-hydrophobic film is 60-150nm, the transmittance of the transparent super-hydrophobic film is 90-97%, and a contact angle with water is greater than 167 degrees. According to the transparent super-hydrophobic film, a method combining radio frequency magnetron sputtering with annealing is adopted to prepare a thin-layer zinc oxide nanostructure on various transparent or nontransparent substrates including common glass, k9 glass, glass plated with an antireflection film or silicon and the like and carry out low-temperature fluoridation, surface energy is greatly lowered, and super-hydrophobic characteristics are expressed. The method has the advantages of simple technology, less pollution, short period and important and wide meanings since a manufacture process is carried out under high vacuum, can be repeatedly operated, is easy in large-scale production, can be widely applied to high-end fields including photoelectric devices, optical devices and the like which have high requirements on transmittance and superhydrophobicity and also can be widely applied to low-end fields of industrial and daily lives including automobile glass, domestic glass and the like.

The invention discloses a nano SiO2 composite polysiloxane modified water-based terpenyl EP / PU (Epoxy Resin / Polyurethane) superhydrophobic self-cleaning polymer and a preparation method thereof. The preparation method comprises the following steps of modifying nano SiO2 into hydrophobic nano SiO2 by using trimethylethoxysilane, and then adding the modified hydrophobic nano SiO2 into a compounded system of polysiloxane modified terpenyl epoxy resin polyol aqueous dispersion and polyisocyanate under the assistance of stirring and ultrasonic waves, crosslinking and curing to obtain the nano SiO2 composite polysiloxane modified water-based terpenyl EP / PU superhydrophobic self-cleaning polymer. The surface static water contact angle of a polymer coating is greater than 150 degrees and a rolling angle of the polymer coating is smaller than 10 degrees. The preparation method disclosed by the invention is simple and convenient; a superhydrophobic coating of which the surface has a micro-nanostructure can be obtained by a spraying process; the nano SiO2 composite polysiloxane modified water-based terpenyl EP / PU superhydrophobic self-cleaning polymer is good in hydrophobicity and lasting in hydrophobic effect, and can be applied to the fields of surface self-cleaning coatings and the like.

The invention discloses an alkylphenol-modified resorcinol-formaldehyde rubber latex. The latex is prepared by alkylphenol, resorcinol, formaldehyde and mixed latex according to certain mass proportion; the preparation method is as follows: the resorcinol and the alkylphenol are placed into a reactor, mixed liquid with soft water and absolute ethyl alcohol is added into the reactor to dissolve the resorcinol and the alkylphenol, then basic catalyst is added, the mixture is stirred and dripped with formaldehyde solution to obtain precondensed alkylphenol- resorcinol- formaldehyde resin (namely ARF resin), and then the ARF resin is added into the mixed latex to constantly stir to obtain the alkylphenol-modified resorcinol-formaldehyde rubber latex (ARFL latex). The latex has good hydrophobic nature; and under high temperature and humidity environment, the strength retention rate of glass fiber coated by the latex of the invention is improved by 5 to 20 percent than the prior RFL latex.

The invention relates to an anti-wicking low-shrink polyester (PET) industrial yarn and a preparation method thereof. The anti-wicking low-shrink PET industrial yarn is prepared by the steps of: carrying out melt spinning on high-viscosity PET chips which are used as raw materials, adding a proper amount of spinning oil, then carrying out stretching setting, adding a proper amount of anti-wicking agent, and then winding, wherein for a formula, the anti-wicking low-shrink PET industrial yarn comprises the following components in parts by weight: 100 parts of Hailide HLD301 high-viscosity PET, 0.5-1 part of Matsumoto HM100 spinning oil, and 0.1-0.6 part of Goulston 624 anti-wicking agent. The preparation method comprises the steps of solid-phase polymerization, melting, metering, cooling and forming, oiling, stretching, application of anti-wicking agent and winding. The product of the anti-wicking low-shrink PET industrial yarn not only has the intrinsic characteristics, including high breaking strength and small dry heat shrinkage, of the low-shrink PET industrial yarn, but also has the property of good hydrophobicity, and can be applied to the fields of high-grade light box advertising fabrics and swimming pool fabrics.

The invention discloses an acrylate / silicone-acrylate compound emulsion and a method for preparing the same. Acrylate emulsions are prepared from acrylate as a main monomer, polyoxyethylene alkyl ether ammonium sulfate as emulsifier and various functional monomers containing carboxyl and are compounded with an silicone-acrylate emulsion to prepare the novel compound emulsion. The process for preparing the compound emulsion is simple, and the compound emulsion not only has the good hydrophobicity, stain resistance, washability and recoatability of the silicone-acrylate emulsion, but also has the good film forming performance, glossiness and solvent resistance of the acrylate emulsion. The compound emulsion film has higher mechanical strength and stronger adhesive force, the problems that the silicone-acrylate emulsion film has lower strength, poor adhesion and the like are solved, and the application range of the silicone-acrylate emulsion film is enlarged. The acrylate / silicone-acrylate compound emulsion can be applied to the field of emulsion coatings for coating roofs, internal walls, external walls, kitchens and the like and also can be applied to the water-proof stain-resistance occasions. The acrylate / silicone-acrylate compound emulsion can improve the grade of the emulsion coating.

The invention discloses a preparation method for a metal surface corrosion resistant / radiating / electromagnetic shielding composite coating. The preparation method comprises the following steps: first, preparing a corrosion resistant and high thermal conductive bottom layer on the surface of a metal shell of a power component by adopting a nano-Al2O3 modified micro-arc oxidation technology; coating the micro-arc oxidation bottom layer with a graphene oxide dispersing liquid which is prepared by an improved Hummers method to obtain a preset graphene oxide layer; then, reducing the graphene oxide layer which is preset on the micro-arc oxidation bottom layer by using vitamin C to obtain an micro-arc oxidation / graphite composite coating for the surface of the metal shell of the power component. The composite coating prepared by the method has excellent performance: the salt-fog resistance is greater than 1,500 hours; the thermal conductivity is high; the emissivity is greater than 0.8; the radiating and cooling effect reaches 10 to 20 percent; the static contact angle is greater than 120 degrees; the electromagnetic shielding effect is greater than 50 dB. According to the preparation method, the problems that the metal (namely, an aluminium, magnesium and titanium alloy and a composite material thereof) shell of the power component used in marine climate and environment is poor in corrosion resistance and low radiating efficiency in a service process are solved.

The invention relates to a method for preparing a superhydrophobic coating, and concretely discloses a method for preparing a superhydrophobic coating by taking a nano-cellulose and a nano-particle asraw materials and modifying the materials in an aqueous solution with a fluoride-free modifier. The problems of environment affection and poor mechanical stability, caused by pollutants introduced inexisting preparation methods of the super-hydrophobic material, are solved. The preparation method comprises the following steps: 1, preparation of a modified nano-cellulose solution; 2, preparationof a modified silica solution; 3, stirring; and 4, mixing. The method is used for preparing the superhydrophobic coating.

The invention discloses organic solvent-free RTV anti-pollution flashover coating and a preparation method thereof. The RTV anti-pollution flashover coating comprises the following components in partsby weight: 30-60 parts of polydimethylsiloxane, 5-10 parts of a hydrophobic auxiliary agent, 5-15 parts of silicone resin, 20-40 parts of a a flame-retardant filler, 1-10 parts of a crosslinking agent, 0.5-5 parts of a tackifier, 0.01-1 part of a catalyst and 0.1-10 parts of a pigment. The RTV anti-pollution flashover coating does not contain any organic solvent, and performance indexes thereof can meet performance requirements of the power industry on insulation, hydrophobicity, weather resistance, construction and the like of the anti-pollution flashover coating; the problems of environmentpollution and the like caused by high VOC emission from the organic solvent in the existing RTV anti-pollution flashover coating are essentially solved.

The invention discloses a preparation method of a photoresponse adhesive with strong adhesion under water, and relates to the technical field of polymer materials, and the preparation method comprisesthe following steps: (1) mixing an epoxy tea oil monomer, a thymine acrylate monomer and an adenine acrylate monomer, dissolving with a solvent, and then adding a polymerization initiator; and (2) removing oxygen by freezing and thawing circulation, introducing nitrogen, reacting at 75 DEG C for 2 hours, and purifying to obtain the photoresponse underwater adhesive. The invention also provides the photoresponse adhesive prepared by the preparation method. The preparation method has the beneficial effects that a one-pot method is adopted to introduce hydrogen-bond interaction between nuclear basic groups, on the basis that the preparation method is simple, the prepared adhesive has more excellent adhesion performance, biocompatibility and hydrophobicity, the adhesion performance is greatlyimproved, and the adhesive can be applied to vegetable oil-based underwater adhesives, the shearing strength of the adhesive is changed by adjusting the water temperature. And meanwhile, the adhesiveprepared by the invention has photoresponsiveness.

The invention discloses an organic silicon fire retardant of organic silicon rubber wastes. The organic silicon fire retardant comprises a raw material, a fire retardation synergy composition, a catalyst and an active phosphorus compound, and the raw material comprises 20-40 parts of the organic silicon rubber wastes, 30-40 parts of melamine, 20-30 parts of a silane coupling agent, 10-20 parts of a strong alkali and 20-40 parts of deionized water; and the fire retardation synergy composition comprises 6-8 parts of carbon nanotubes, 2-4 parts of a nanometer meso-porous molecular sieve, 3-5 parts of nanometer attapulgite, 4-6 parts of micrometer silicon nitride and 4-8 parts of micrometer silicon carbide. The organic silicon fire retardant based on the organic silicon rubber wastes has very good hydrophobic performance, and can be added to polypropylene in order to substantially improve the fire retardation performance of polypropylene.

The invention discloses a polysiloxane insulation coating for a railway cantilever and a preparation method thereof. The polysiloxane insulation coating includes, by weight, 100 parts of hydroxyl-terminated straight-chain polysiloxane resin, 5-15 parts of branch-chain polysiloxane resin, 10-40 parts of fumed silica, 30-60 parts of filler, 30-40 parts of a flame retardant, 2-6 parts of a structurecontrol agent, 2-5 parts of a plasticizer, 3-7 parts of a crosslinker, 3-5 parts of a coupling agent, 150-200 parts of a solvent, and 0.2-0.8 parts of a drying accelerant. The coating is formed with the polysiloxane as a main resin and with Si-O-Si as a framework, so that the coating is good in weather resistance, so that the cantilever has longer service life. The coating has excellent hydrophobicity, wherein the plasticizer enables the coating to have excellent hydrophobic mobility, so that maintenance period of the cantilever is prolonged. The coating has excellent comprehensive performanceand can guarantee safe and normal work of trains on the railway.

The invention discloses aromatic polyimine thermosetting resin and a preparation method thereof. The preparation method comprises the following steps: 1) uniformly dissolving an aromatic aldehyde andan aromatic amine in an aprotic solvent, and stirring for reaction at 20 to 100 DEG C for 0.05 to 5 hours to obtain a prepolymer precipitate or a prepolymer solution; 2) filtering and drying the prepolymer precipitate or drying the prepolymer solution, then placing the prepolymer solution in a mold for hot press forming at 150 to 250 DEG C under 1 to 20 MPa to obtain the thermosetting resin havinga structural formula of formula I, wherein R1 and R2 are benzene ring-containing aromatic structures. The thermosetting resin has excellent mechanical properties, heat resistance and hydrophobic properties, the preparation method has the advantages of simple process, adjustable controllable reaction process and high yield, and the obtained resin can be recycled and reused, and is suitable for expanding production.

A preparation method of graphene sponge for efficient oil-water separation comprises the following steps that (1) clean polyurethane sponge is taken; (2) graphene oxide is prepared; (3) graphene oxidedispersion is prepared; (4) 2 mg / ml of graphene oxide ethanol suspension is prepared; (5) hydrazine hydrate and the clean polyurethane sponge obtained in the step 1 are added into the graphene oxideethanol suspension obtained in the step 4, the mixture is put in a chemical microwave reactor, microwave heating reaction is executed for 30-60 minutes, then the mixture is put in an ultrasonic cleaner, ultrasonic dispersion is executed for 30-50 minutes to increase the distribution uniformity of graphene oxide, the sponge is taken out, washed with deionized water, and is dried in an oven at 80-100 DEG C; (6) a polydimethylsiloxane / n-hexane solution is prepared; (7) the graphene sponge for efficient oil-water separation is prepared. The graphene sponge has excellent adsorption properties as well as good hydrophobicity.

The invention relates to the field of glass antifogging agents, in particular to an automotive glass antifogging agent and a preparation method thereof. The automotive glass antifogging agent consists of the following raw materials in percentage by weight: 2 to 5 percent of methyl trifluoropropyl silicon oil, 2 to 5 percent of volatile perfluoro-oil, 2 to 5 percent of oleic acid, 2 to 5 percent of 1,5-pentanediol, 2 to 5 percent of tween-80, and the balance of water. The automotive glass antifogging agent is prepared by the following steps of: (1) dissolving the tween-80 in the water, and stirring the mixture; (2) mixing the volatile perfluoro-oil, the oleic acid and the methyl trifluoropropyl silicon oil together, and uniformly stirring the mixture; (3) pouring the liquid of the step (2) into the liquid of the step (1), and uniformly stirring the mixture; (4) pouring the 1,5-pentanediol into the liquid of the step (3), and uniformly stirring the mixture. The introduction of fluorine ensures that the antifogging agent has excellent hydrophobicity and an antifogging function, the antifogging time is prolonged, and the antifogging effect is improved; furthermore, the automotive glass antifogging agent has no side effect on human bodies, and has the functions of preventing rain, cleaning glass and protecting a wiper after the automotive glass antifogging agent is coated on external glass and a back view mirror of an automobile.

The invention discloses a method for producing sintered straight-through water-conveying water-permeable bricks by utilizing lithium tailings and steel slag tailings. The method comprises the following steps: performing homogenization treatment on the lithium tailings and the steel slag tailings, putting the processed lithium tailings, the processed steel slag tailings, a clay raw material and water into a ball mill according to a certain ratio, performing mixing fine grinding, performing sieving to remove iron, putting the iron-removed material in a mud pool, performing filter pressing to form a mud cake, performing mud refining to extrude mud sections, performing extrusion molding on the mud sections to obtain wet green sintered water-permeable bricks with uniformly-distributed straight-through water-conveying holes of 5-10 mm, cutting the wet green bricks, putting the cut wet green bricks on supporting plates, sending the supporting plates to a tunnel kiln, and performing drying; and performing high-temperature sintering on dry green bricks according to a certain firing system at temperature of 1100-1200 DEG C in an energy-saving double-layer tunnel kiln to prepare the water-permeable bricks. The water-permeable bricks disclosed by the invention have a plurality of functions such as very good water permeability and hydrophobicity, no pollution, high strength, strong corrosion resistance, good freeze-thaw resistance, long service life, climate adjustment, elimination of an urban heat island effect, and maintaining of surface water circulation, and meet the requirements ofenergy conservation and emission reduction, environmental protection and development of low carbon economy in China.

The invention belongs to the field of a packing material, and particularly relates to a fruit cuticle-imitated compression-resistant germproof packaging film and a preparation method thereof. The fruit cuticle-imitated compression-resistant germproof packaging film provided by the invention comprises the following components: konjac glucomannan-esterified and modified product, paraffins, chitosan, carrageenan, xanthan gum, polycaprolactone, epoxidized soybean oil, glycerol and water. According to the structure of the fruit cuticle, and in combination with the good film-forming property of the konjac glucomannan, the film which is good in biomechanical property and effective in barrier property can be prepared, so that the film not only can restrain the absorbing, breeding and infecting of the microorganism on the surface of the film, but also can play a part in press resistance like a strengthening rib. The mechanical property and antimicrobial property of the film can be enhanced due to the added polycaprolactone, chitosan, carrageenan, reducing glue, epoxidized soybean oil, glycerol, paraffins and the like. The preparation method provided by the invention is simple in technology, and the materials are convenient to take and low in price, so that the fruit shelf life can be obviously prolonged.

The invention provides a preparation method of an oil-water separation fabric and a super-hydrophobic fabric prepared by the preparation method. The method comprises the following steps of S1, hydrolyzing tetrabutyl titanate and obtaining titanium dioxide sol; S2, adding siloxane to the titanium dioxide sol for reaction and obtaining modified titanium dioxide sol; and S3, finishing a profiled fiber fabric by adopting the modified titanium dioxide sol and obtaining an oil-water separation fabric. The method provided by the invention is simple in preparation process; and the prepared fabric hasexcellent wear resistance and durability and excellent reproducibility and recyclability, and simultaneously has high oil-water separation efficiency.

The invention relates to a preparation method of hydrophobic anti-fog surfaces, and belongs to the technical field of anti-fog surface and mico-nano manufacturing. An ultraviolet lithography technology and a soft lithography technology are combined in preparation of the hydrophobic anti-fog surfaces. The preparation method comprises the steps that a micro square hole array structure is prepared bytaking SU-8 2005 photoresist as a base material and adopting the ultraviolet lithography technology, wherein the substrate can be repeatedly used; and the micro square array structure is copied by taking PDMS a structure material to obtain a micro square column array structure, and different hydrophobic anti-fog surfaces can be obtained by adjusting the size and interval of a micro square columnarray. The structure of the anti-fog surfaces prepared through the method is not prone to be destroyed, the anti-fog surfaces show the good transmittance, hydrophobicity and anti-fog performance, andthe preparation method is simple in technology, controllable in experiment parameter and very beneficial for industrialized large-area production and application.

The invention discloses an RFID label antenna preparation method based on liquid drop micro-injection. The preparation method comprises the following steps: a hydrophobic coating layer is prepared on a PET film substrate surface by utilization of a pulling method; an RFID label antenna pattern is prepared through a liquid drop micro-injection method; the substrate prepared with the RFID label antenna pattern is placed in a constant temperature drying box and is subjected to sintering, and a cured RFID label antenna is prepared. Only one step is needed for the RFID label antenna pattern preparation process, the cost is low, a special template is not needed, and RFID label antennas with any patterns can be prepared.

The invention discloses a marine low-surface-energy anti-fouling coating. Raw materials of the coating comprise modified silicone-acrylate resin, chlorosulfonated polyethylene, teflon, a vinylidene fluoride-hexafluoropropene copolymer, epoxy resin, waterborne polyamide, zinc phosphate, carbon nanotube, silicon nitride, nano-sized iron oxide, nano-zinc oxide, mica powder, cerium stearate, fiber fluff, paprika, ground pepper, 3-(3,4-dichlorophenyl)-1,1-dimethylurea, PTPB, 4,5-dichloro-2-n-octyl-3-isothiazolinone, xylene, ethyl acetate, acetone, ethylene glycol monobutyl ether, cyclohexanone and an auxiliary agent. The marine low-surface-energy anti-fouling coating brought forward in the invention has high strength and a good antifouling effect, is resistant to seawater corrosion when in use and is environmentally friendly.

The invention discloses a preparation method of hydrophobic sponge based on a graphene / CNT (carbon nano-tube) composite material. The method includes the steps: (1) clean melamine sponge preparation;(2) graphene oxide preparation; (3) graphene oxide suspension liquid preparation; (4) graphene oxide / carbon nano-tube mixed solution preparation; (5) adding hydrazine hydrate and clean melamine spongeacquired in the step (1) into graphene oxide / carbon nano-tube mixed solution acquired in the step (4), placing mixture into a microwave chemical reactor, placing the mixture into an ultrasonic cleaner to ultrasonically disperse the mixture for 30-50 minutes after the sponge is changed into black from white, taking out the sponge, washing redundant graphene on the surface of the sponge by deionized water, and placing the mixture into a drying oven with the temperature of 80-100 DEG C to dry the mixture; (6) dimethyl siloxane / normal hexane solution preparation; (7) preparation of the hydrophobic sponge based on the graphene / CNT composite material. The hydrophobic sponge has excellent absorption property and good hydrophobic property.

The invention provides a hydrophobic coating for an external wall. The coating is prepared from the following components in parts by mass: 10-20 parts of a film forming emulsion, 8-15 parts of triplesuperphosphate, 5-10 parts of titanium dioxide, 1-3 parts of a film forming aid, 2-5 parts of a defoamer, 1-5 parts of a dispersing agent, 2-10 parts of a lotus leaf hydrophobic agent, 1-3 parts of awetting agent, 3-10 parts of a preservative, 0.3-1 part of a bactericide, 1-8 parts of a thickener, 3-8 parts of a light stabilizer, 40-60 parts of deionized water, 1-4 parts of kaolin, 5-15 parts ofnano far-infrared ceramic powder and 0.2-1 part of a PH regulator. The hydrophobic coating for the external wall has the advantages that hydrophobic performance is good, the external wall of a building is convenient to clean, the coating is prevented from being damaged, labor intensity is reduced, and the hydrophobic coating is suitable for popularization and application.

The invention discloses a beneficiation method for recovering molybdenum from a tungsten tin associated sulfide ore bulk concentrate. The beneficiation method is characterized by comprising the following steps: after the heating reagent removal is performed for a sulfide ore bulk concentrate obtained from a tungsten tin associated sulfide ore; water is added for mixing pulp; quicklime is added for stirring to adjust the pulp; an inhibitor and a collecting agent are added for primary roughing to obtain a primary roughing concentrate and a primary roughing tailing; the collecting agent is added in the primary roughing tailing for secondary selection to obtain a secondary selection concentrate and a secondary selection tailing; and three times of blank selection are performed for the secondary selection concentrate to obtain a molybdenum concentrate. The method obtains the molybdenum concentrate with a molybdenum grade of 48-52% and a molybdenum recovery rate of 87-93%, reduces the molybdenum selection cost, generates no waste water and other substances harmful to the environment, and is an environment-friendly beneficiation method. The method is suitable for recovering molybdenum from the tungsten tin associated sulfide ore bulk concentrate.

The invention relates to the technical field of metal material surface modification, in particular to a preparation method of a bionic no-modification super-hydrophobic Cu-Zn-CeO2 layer and application thereof. The method comprises the following steps: 1) an electro-deposition solution is prepared, a water soluble copper salt solution and a zinc salt solution are mixed with seignette salt to obtain a solution A and a solution B for future use, then, after the solution A and the solution B are mixed, sodium hydroxide is added, and finally, nanometer CeO2 is added for uniform stirring; and 2) the electro-deposition solution obtained in the step 1) is deposited on the surface of metal to form a bionic micro-nano composite structure Cu-Zn-CeO2 layer by using an electro-deposition technology, and then, the metal is naturally placed under the room-temperature condition by set time to obtain a finished product. The method is combined with self dewatering characteristics of CeO2 and oxygen absorbability of CuO / ZnO to achieve super-hydrophobicity of the formed Cu-Zn-CeO2 layer under the condition of no low-energy modification.