43results about How to "Achieve hydrophobicity" patented technology

A manufacturing method for a copper-based super-hydrophobic surface structure mainly includes that step 1, a metal copper base is pre-processed; step 2, a layer of photoresist is coated on the surface of the processed copper base in a rotation mode, and the photoresist layer attached to the surface of the copper base forms a well-aligned porous array template through photoetching processing; step 3, the copper base with the well-aligned porous array template obtained in the step 2 is used as an anode and soaked in a CuSO4 solution to form a primary battery to conduct a reaction for 4-8 min; step 4, the copper base of the primary battery obtained in the step 3 after reaction is finished is soaked into an AgNO3 solution to conduct in-situ reduction for 30-70s; step 5, the copper base subjected to the reaction in the step 4 is subjected to silanization processing, and the copper-based super-hydrophobic surface structure is manufactured. By means of the method, two simple redox processes are utilized to obtain a layer of micro-nano dual-scale structure similar to the lotus leaf surface on the surface of copper metal, hydrophobe is achieved, the performance of the manufactured super-hydrophobic surface is stable, a contact angle between the super-hydrophobic surface and a water solution with a pH value ranging from 1 to 14 can be larger than 155 degrees, and the minimum rolling angle can be smaller than 1.5 degrees.

The invention discloses a preparation process of modified heavy calcium carbonate. The preparation process comprises the following steps: simultaneously adding a modified grafting agent and an ethanolsolution into a stirring reaction cylinder of a dispersive feeding type stirring device, simultaneously dividing heavy calcium carbonate into three equal parts, respectively adding the three equal parts into three dispersive feeding mechanisms, stopping stirring after the reaction is completed, discharging, filtering the obtained material, and drying to obtain the modified heavy calcium carbonate. In the process for improving heavy calcium carbonate, the dispersive feeding type stirring device is used, a first material guide cylinder, a second material guide cylinder and a third material guide cylinder in the device go deep into the three positions of the center edge side and the middle of the stirring reaction cylinder, materials are evenly added into the different positions of the stirring reaction cylinder, meanwhile, due to the fact that the whole dispersed feeding mechanism conducts feeding in the rotating process, stirring is conducted while feeding is conducted, and then sufficient mixing of the materials is achieved.

The invention discloses a nanometer self-cleaning coating and a preparation method thereof. The preparation method comprises the following steps of: firstly synthesizing SiO2 by a hydrolyzation method, adding a nanometer photocatalyst in the synthetic process, preparing SiO2/photocatalyst hydrophobic composite nanoparticles with a photocatalytic property, then polymerizing fluorine-containing function monomers and soft-hard monomers under the action of an inhibitor to form fluorine-modified acrylic resin, and finally adding the SiO2/photocatalyst hydrophobic composite nanoparticles into the fluorine-modified acrylic resin, plating membranes by adopting a dipping-pulling method to prepare the nanometer self-cleaning coating. The nanometer self-cleaning coating and the preparation method disclosed by the invention have the advantages that the hydrophobic function and the photocatalytic function are achieved, organic dirt adhered on the surface of a basic material can be effectively decomposed into inorganic substances, and by combination of the hydrophobic function, the self-cleaning effect for the surface can be realized.

The invention belongs to the technical field of preparation of a novel anti-photoaging stone cultural relic coating, and provides a preparation method of a durable hydrophobic anti-photoaging stone cultural relic sealing coating in order to overcome the defects that an existing anti-photoaging stone cultural relic sealing coating is poor in durability, prone to pollution, poor in anti-photoaging performance, low in strength and the like. According to the invention, fluorosilane and nano TiO2 are added into an isopropanol solution, and ultrasonic dispersion is carried out; a mixed solution of PDMS and a curing agent are prepared; and the fluorosilane grafted nano TiO2 is dried, the dried fluorosilane grafted nano TiO2 is added into a PDMS mixed solution, ultrasonic dispersion is carried out, the surface of the stone cultural relic is coated with the obtained product, vacuumizing is carried out, and curing is performed to obtain the durable hydrophobic anti-photoaging stone cultural relic sealing and protecting coating. Due to the fact that the nano TiO2 with the light shielding performance is enriched on the surface, the light aging resistance is improved. The fluorosilane-modifiednano TiO2 migrated to the surface reduces the surface energy of the coating, thereby enhancing the hydrophobicity. The preparation method is simple and easy to implement, short in period, suitable forlarge-scale production and applied to stone cultural relic protection.

The invention discloses a pressure-resistant and weather-resistant light material containing loofah sponge and used for vehicle covering and a preparation method. The light material comprises raw materials in parts by weight as follows: 100-200 parts of nano loofah sponge fiber, 40-80 parts of nano lotus leaf fiber, 30-50 parts of polypropylene staple fiber, 20-40 parts of sodium hydroxide, 3-7 parts of ultraviolet ray absorption polyester, 1-5 parts of a brominated flame retardant, 4-6 parts of nano hollow glass beads, 60-80 parts of epoxy resin, 5-7 parts of a coupling agent, 4-8 parts of phenyl silicone oil, 2-4 parts of carboxymethyl cellulose sodium, 70-80 parts of polystyrene, 15-25 parts of hydrochloric acid, 12-20 parts of ethanol and an appropriate amount of deionized water. An epoxy resin material is prepared from the low-density and light loofah sponge fiber with high toughness, high pressure resistance and high fracture resistance in cooperation with weather-proof materials such as ultraviolet ray absorption polyester, the brominated flame retardant, the nano hollow glass beads and the like; the pressure-resistant and weather-resistant light material has the advantages of lightweight, pressure resistance, weather resistance, convenience in carrying and use and the like; the hydrophobic lotus leaf fiber is adopted for graft modification of the loofah sponge fiber, and hydrophobicity is realized; the polypropylene staple fiber is adopted for graft modification of the loofah sponge fiber, and the fracture resistance of the material is realized.

The invention discloses a super-hydrophobic heat-resistant coating for an aluminum alloy and a preparation method of the super-hydrophobic heat-resistant coating, and relates to the technical field of coatings. The heat-resistant coating is formed on the surface of the aluminum alloy through the spraying pretreatment process and the second-time spraying treatment in sequence, the heat-resistant coating and the aluminum alloy form a firm cross-linked interpenetrating network structure, the heat resistance of the coating is improved, and the phenomenon that the service life of the aluminum alloy is shortened in a high-temperature environment is reduced; and then third spraying treatment is conducted, a corrosion inhibitor serves as an inner core solution, stearic acid serves as a shell solution, a super-hydrophobic coating is formed through coaxial electrostatic spraying, the corrosion inhibitor is prepared from isoquinocarboxylic acid, dipropylene triamine and p-methoxyphenyl thiourea, the surface of the aluminum alloy is isolated from an environment medium, and corrosion of an acid medium and chloride ions is inhibited. The prepared super-hydrophobic heat-resistant coating for the aluminum alloy has the heat-resistant, super-hydrophobic and corrosion-resistant effects.

The invention discloses a coating liquid with high barrier property and application thereof, the coating liquid comprises, by weight, 40-60 parts of a water-based polyester emulsion, 2-10 parts of a nucleating agent, 5-15 parts of a nanoparticle dispersion liquid, 0.5-1 part of a dispersant, 0.1-1 part of a stabilizer, 2-10 parts of a curing agent and 30-40 parts of deionized water, and the water-based polyester emulsion comprises water-based crystalline resin. According to the coating liquid disclosed by the invention, through matching of the water-based crystalline resin and other raw materials, uniform coating and qualified adhesive force of the coating liquid on different base materials are met, so that high-efficiency application of the coating liquid to packaging of products with high barrier requirements is realized.

The invention discloses a treatment technology for preventing mildew and corrosion of fresh bamboo. The treatment technology comprises the following steps A to C of: firstly, weighing heat conductionoil, heating to certain temperature, and maintaining for a period of time; adding the fresh bamboo into the heat conduction oil, and continuing to heat; specifically heating and warming by sections, performing heat treatment on the fresh bamboo by utilizing the self characteristics of the heat conduction oil, naturally cooling the heat conduction oil and the fresh bamboo, fetching out the fresh bamboo at certain temperature, draining water, and naturally cooling the fresh bamboo, so as to complete the heat treatment on the fresh bamboo. The treatment technology has the advantages that the nutritional matters in the fresh bamboo material are thoroughly modified; by performing the impregnating and heat treatment by the high-temperature heat oil, the hydrophilic groups of the structure in thebamboo fibers are destroyed and decomposed, so that the hydrophobicity of the material is reached, the water content is reduced, and the influence by outside humidity is avoided; the internal microorganisms are killed, so that the effect of preventing mildew and corrosion is reached, and the stability of the fresh bamboo material is improved.

The invention discloses a rainproof ceramifiable polyolefin material. The rainproof ceramifiable polyolefin material is prepared from 50-80 parts of polyolefin, 20-50 parts of rubber mixings of silicone rubber, 80-120 parts of high-temperature-resistant packings, 10-30 parts of a halogen-free flame retardant, 20-40 parts of a ceramic formation sintering aid, 0.01-1 part of a platinum complex or aplatinum compound (in terms of platinum), 1-5 parts of a compatilizer and 0.5-1 part of a cross-linking agent. The invention further discloses a preparation method of the material. The preparation method comprises following steps: polyolefin and silica gel are blended, and the various packings are mixed, aged and vulcanized. The rainproof ceramifiable polyolefin material has excellent mechanical strength and fireproof performance, the surface of formed ceramic is hydrophobic, water can be effectively prevented from permeating into the ceramic, reduction of insulating property due to water absorption after firing ceramic formation of the material can be prevented effectively, the cost of the material is lower than that of ceramifiable silicone rubber, the fireproof performance of the material is higher than that of a common ceramifiable polyolefin material, and the rainproof ceramifiable polyolefin material has great significance when applied to the field of fireproof cables.

The invention relates to a device and method for preparing a silicon dioxide aerogel felt and the silicon dioxide aerogel felt. The device comprises a gum dipping tank, and the gum dipping tank is provided with a compression roller; the liquid collecting tank is arranged on one side of the gum dipping tank, and the winding roller group is arranged above the liquid collecting tank; the drainage drying box is arranged above the liquid collecting tank, a felt inlet and a felt outlet are formed in the drainage drying box, and a tensioning mechanism and a drying assembly are arranged in the drainage drying box; the tensioning mechanism comprises a tensioning roller set, and the tensioning roller set is used for tensioning the gel felt located between the felt inlet and the felt outlet; the drying assembly comprises an air injection assembly communicated with the air inlet pipe, the air injection assembly comprises an air distribution row and a plurality of hot air knives communicated with the air distribution row, air outlets of the hot air knives are aligned with the tensioning gel felt, and the air injection assembly is used for injecting preheated nitrogen and a gas-phase hydrophobization reagent to the fiber felt body; an exhaust hole for exhausting gas is reserved in the hydrophobic drying box; therefore, hydrophobic and drying treatment of the silicon dioxide wet gel felt is achieved, and it is guaranteed that the formed hydrophobic silicon dioxide aerogel felt has high quality.

According to the method for preparing the hydrophobic silicon dioxide aerogel felt under the normal pressure, a liquid-phase hydrophobization reagent is promoted to be converted into a gas-phase hydrophobization reagent through preheated nitrogen, and the circulated preheated nitrogen and the gas-phase hydrophobization reagent can bring out an organic solvent in wet gel during hydrophobization treatment; and dewatering and drying treatment on the wet gel felt is realized. According to the preparation method, the preparation period of conventional hydrophobic aerogel can be obviously shortened, the production cost can be reduced, meanwhile, replacement of a large amount of solvent after a traditional hydrophobization reaction is completed can be avoided, the whole preparation process is simple in technology, the aerogel drying process and aerogel hydrophobization treatment are carried out at the same time, operation is easy, and economical and environment-friendly effects are achieved.

The invention discloses a hydrophobic high-nickel ternary material and a preparation method thereof. The preparation method comprises the following steps: S1, preparing a fluorosilane solution; S2, preparing the hydrophobic high-nickel ternary positive electrode material; and S3, performing sintering heat treatment to obtain the high-nickel ternary positive electrode material with the hydrophobiclayer with the stable surface structure. Fluorosilane is hydrolyzed in an acidic environment, a hydrophobic layer is formed on the surface of the high-nickel ternary positive electrode material, and the surface structure of the high-nickel ternary positive electrode material is more stable through sintering heat treatment, so that the hydrophobicity of the high-nickel ternary material is realized,the homogenate and coating processability of the high-nickel ternary positive electrode material is improved, a pole piece is prevented from storing and absorbing water, the side reaction of moistureand electrolyte is reduced, the electrical property of the lithium ion battery is obviously improved, meanwhile, the preparation process is simple, the cost is low, and industrialization is easy to realize.

The invention discloses a preparation process of a decorative plate containing a polyurethane thermal insulation layer. The preparation process comprises the following specific steps that a support isolation layer is soaked in an ethylenediamine solution, then the support isolation layer is fished out to wipe off redundant ethylenediamine on the surface, then the wiped support isolation layer is fixed below a mold, and a polyurethane material to be foamed is injected into the mold to obtain a thermal insulation support plate; and the thermal insulation support plate is soaked in 3-(2, 3-epoxypropoxy) propyltrimethoxysilane and then fished out to be dried, the bottom face of the decorative layer is coated with a layer of epoxy resin adhesive, then the decorative layer is bonded to the surface of the support isolation layer of the hydrophobic thermal insulation support plate through the epoxy resin adhesive, and the decorative plate is obtained. According to the preparation process, thehigh-strength support isolation layer is arranged between the thermal insulation layer and the soft porcelain decoration layer, the strength of the decorative plate can be improved, the decoration layer can be directly torn down after being used for a period of time, a new decoration layer is pasted again, no decoration layer remains on the surface of the torn-down supporting isolation layer, andsecondary pasting is not affected.