2261 results about "Hydrophobe" patented technology

The invention discloses silencing and mildew-proof organic silica gel as well as a preparation method and application thereof, and belongs to the technical field of organic silicon binding material polymers. Comprising the following components in parts by weight: 35-45 parts of nano calcium carbonate, 32-40 parts of hydroxyl-terminated polysiloxane, 5-9 parts of silencing powder, 0.5-2.5 parts of glass fiber powder, 5-9 parts of a hyperbranched polymer, 2-5 parts of a hydrophobic surface modifier, 1.5-3 parts of color paste, 1-2 parts of a water-based coupling agent, 1-2 parts of a cross-linking agent, 0.5-2.5 parts of a mildew preventive, 0.4-2 parts of a composite titanide and 0.4-0.7 part of nano silver powder. According to the invention, the nano silver powder and the mildew preventive are compounded, and an inorganic sterilization system is combined, so that broad-spectrum environment-friendly bacteriostasis is realized, and high-humidity long-acting protection is met; the powder is subjected to hydrophobic treatment, moisture is blocked, and high adhesion is kept; silencing powder serves as a core, a sound absorption network is cooperatively formed, the noise reduction capacity is improved, and the device is suitable for multiple scenes.

The invention relates to the technical field of coatings, in particular to a corrosion-resistant coating material and a preparation method thereof. The corrosion-resistant coating material comprises the following components in parts by mass: 80-100 parts of epoxy resin, 5-20 parts of a modified phenolic aldehyde amine curing agent, 2-5 parts of a waterproof agent, 5-10 parts of a corrosion inhibitor and 40-55 parts of a lubricant. The modified phenolic aldehyde amine curing agent is obtained by carrying out Mannich reaction on phenol, thymol, aliphatic polyamine and formaldehyde. The phenol provides a rigid benzene ring structure, and endows a cured product with good heat resistance and chemical resistance. Thymol improves the flexibility and adhesive force of the cured product and enhances the hydrophobicity of the cured product at the same time. The epoxy resin and the modified phenolic aldehyde amine curing agent are polymerized, the waterproof agent, the corrosion inhibitor and the lubricant are wrapped, and the obtained coating material has good adhesive force and corrosion resistance.

The present invention discloses coated hydrophobic polyphenol nanoparticles, preparation method therefor and application thereof. The preparation method for coated hydrophobic polyphenol nanoparticles includes: (1) obtaining a hydrophobic polyphenol nanoparticles suspension; (2) injecting a catechin aqueous solution and a metal salt aqueous solution into the hydrophobic polyphenol nanoparticles suspension to obtain a composite nanoparticles suspension; (3) removing excess catechin and metal ions from the composite nanoparticles suspension to obtain a coated hydrophobic polyphenol nanoparticles suspension. The present invention provides an application of the coated hydrophobic polyphenol nanoparticles in the preparation of pectin gel. The coated hydrophobic polyphenol nanoparticles exhibit significantly enhanced biological activity and long-term stability, developing a pectin gel with long-term stability.

The invention discloses a graphene nano long-acting anticorrosive paint and a preparation method thereof, and relates to the technical field of anticorrosive paints.The graphene nano long-acting anticorrosive paint is prepared from 100 parts of epoxy resin and 1.0 part of a functionalized graphene mixture; the functionalized graphene mixture comprises a component 1, namely flexible interface-aminosilane functionalized graphene, and a component 2, namely long-chain alkyl grafted hydrophobic graphene; wherein the relative weight ratio of the component 2 in the functionalized graphene mixture, defined as the weight of the component 2 / (the weight of the component 1 + the weight of the component 2), is in the range of 0.1 to 0.4. According to the invention, the dual functionalized graphene is cooperated, and gradient curing and thickness-ratio self-adaptive adjustment are combined. The obtained coating has excellent internal stress buffering capability, stable surface hydrophobicity and wide adaptability to different construction thicknesses, and is excellent in corrosion-resistant comprehensive performance.

The invention relates to a recyclable easily-degradable macromolecular surfactant for cleaning oily sludge and application of the recyclable easily-degradable macromolecular surfactant. The macromolecular surfactant is prepared by taking acrylamide, methacrylic acid long-chain alkyl ester and tertiary amino substituted methacrylate as raw materials through free radical polymerization. The macromolecular surfactant is dissolved in water to prepare a cleaning solution, and oily sludge can be efficiently eluted. CO2 and N2 are sequentially introduced into the oil-containing emulsion after the oil-containing sludge is cleaned, or diluted hydrochloric acid and a diluted alkali aqueous solution are sequentially added, the hydrophilic-hydrophobic property of the macromolecular surfactant is changed through pH regulation and control, separation of the macromolecular surfactant and an oil phase is achieved, petroleum resources are recycled, and recycling of the cleaning solution containing the macromolecular surfactant is achieved. The residual macromolecular surfactant in the cleaned deoiled sludge can be degraded under the action of environmental microorganisms.

The invention discloses a highly inert Gd-DOTA-based contrast agent with a hydrophobic side chain as well as a preparation method and application of the highly inert Gd-DOTA-based contrast agent, and two novel Gd-DOTA-based contrast agents Gd-L1 and Gd-L2 are successfully developed by respectively connecting hydrophobic 3-phenyl propylamine and 3, 3-diphenyl propylamine to Gd-DOTABA. The two novel Gd-DOTA-based contrast agents remarkably improve the chemical inertness of the complex, the dissociation half-life period of the complex in a 1 M HCl solution at 37 DEG C is about 5 times that of Gd-DOTA, and a powerful guarantee is provided for clinical safety; the MRI (Magnetic Resonance Imaging) performance of the liver in a mouse shows that Gd-L1 is equivalent to commercially available Gd-BOPTA and is suitable for imaging of a liver and gall system; after the Gd-L2 is combined with the human serum albumin, the longitudinal relaxation rate is obviously increased (r1 = 14.8 mM <-1 > s <-1 >, 1.4 T, 37 DEG C), the blood elimination half-life period in a rabbit model is about 18 minutes, and the Gd-L2 is suitable for vascular MRI (Magnetic Resonance Imaging). The two contrast agents avoid the spleen residual problem, the organ accumulation possibility is reduced, and a safer and more efficient MRI diagnostic tool is provided for clinic.

The invention relates to the technical field of chemical coatings, and discloses a paint formula containing an epoxy modified organic silicon resin liquid, which comprises the following raw materials by weight: 50-70 parts of an epoxy modified organic silicon resin liquid, 15-30 parts of a pigment filler, 5-15 parts of a functional auxiliary agent, 10-25 parts of a solvent, and 8-20 parts of a curing agent. Through graft copolymerization of an organosilicon prepolymer and epoxy resin, an organosilicon chain segment and an epoxy chain segment form stable chemical bonding on a molecular level, the organosilicon chain segment endows a paint film with excellent flexibility, heat resistance and hydrophobicity, and the epoxy chain segment provides strong adhesive force and chemical stability. The two components cooperate with each other to construct a composite three-dimensional network structure with rigid supporting and elastic buffering functions, so that the adhesion fastness of a paint film to a base material is enhanced, and the deformation recovery capability of the paint film under the action of thermal stress or mechanical stress is also improved, thereby realizing cooperative reinforcement of physical and mechanical properties of the paint film.

The invention belongs to the technical field of membrane separation, and particularly relates to a preparation method and application of a high-permeability polyamide reverse osmosis membrane. According to the invention, the problems of high energy consumption and poor water production quality caused by non-ideal flux and rejection rate of the current reverse osmosis membrane product are solved, tetrabutylammonium bromide and acyl chloride form ion pairs to reduce hydrophobicity, a hydrogen bond network of urea destroys a hydrophobic barrier of an organic phase, and migration of acyl chloride to a water phase interface is promoted; the eutectic solvent is adsorbed on a water phase interface to form a'catalytic microenvironment ', amido of an amine monomer is attracted to be close to the interface, and the concentration of a reaction area is increased. During reaction, tetrabutylammonium bromide enables an amine monomer to stably attack a transition state of acyl chloride through electrostatic interaction, and reaction activation energy is reduced; urea and sodium hydroxide in a water phase can be jointly used as an acid-binding agent to neutralize generated hydrochloric acid so as to prevent amido protonation inactivation. The method is simple to operate and suitable for large-scale production.

The invention belongs to the technical field of metal anticorrosive coating materials, and particularly relates to a super-hydrophobic composite coating and a preparation method thereof. According to the invention, MoS2 is used as a skeleton, CeO2 nanoparticles are uniformly loaded on the surface of a MoS2 two-dimensional layered structure, polydopamine is used as a connecting agent to form a stable Ce-MoS2 composite filler, and an active and passive protective layer with the Ce-MoS2 composite filler is constructed on the surface of a matrix and is used as a bottom layer. And then, forming a hydrophobic coating containing modified SiO2 on the bottom layer to serve as a surface layer, so as to obtain the super-hydrophobic composite coating with double protection mechanisms. According to the coating, the active corrosion inhibition function of CeO2 and the physical shielding effect of MoS2 are combined, meanwhile, hydrophobic SiO2 nano-particles are introduced into the surface layer, the hydrophobic performance of the surface is further enhanced, and therefore the technical problems that a traditional coating is prone to corrosion at the defect position and a corrosive medium is prone to permeation, and consequently the protection effect is remarkably reduced are effectively solved.

The invention provides an epoxidized soybean oil-binary acid bio-based dynamic polymer, a preparation method thereof and a paper-based strain sensor packaged by the epoxidized soybean oil-binary acid bio-based dynamic polymer. The preparation method of the dynamic polymer comprises the following steps: (1) taking epoxidized soybean oil as an epoxy monomer, aliphatic dibasic acid as a flexible monomer and aromatic dibasic acid as a rigid monomer, and carrying out polymerization reaction in the presence of a transesterification catalyst to obtain a dynamic polymer prepolymer; the aliphatic binary acid comprises succinic acid, adipic acid and sebacic acid; (2) removing bubbles from the dynamic polymer prepolymer; and (3) carrying out thermal curing on the dynamic polymer prepolymer to obtain the epoxidized soybean oil-binary acid bio-based dynamic polymer. The epoxidized soybean oil-binary acid bio-based dynamic polymer has good mechanical properties and hydrophobicity, a paper-based strain sensor based on the epoxidized soybean oil-binary acid bio-based dynamic polymer also has good mechanical properties and hydrophobicity, and the sensor has certain application potential in the field of human motion monitoring.

The invention discloses a biodegradable flexible conductive high-hydrophobicity sensor substrate and a preparation method and application thereof.The preparation method comprises the steps that a polylactic acid electrostatic spinning solution and a chitosan / polyethylene oxide mixed electrostatic spinning solution are prepared on the basis of a safe and non-toxic food-grade material; the preparation method comprises the following steps: sequentially spinning by adopting an electrostatic spinning technology to form a sandwich structure flexible substrate, transferring a carbon nano tube conductive film, and tightly attaching the carbon nano tube conductive film to the surface of a polylactic acid layer of the sandwich structure substrate, thereby finally obtaining the flexible conductive high-hydrophobicity composite substrate. According to the invention, a hydrophobic-hydrophilic-hydrophobic sandwich structure is constructed through multi-layer electrostatic spinning, and a surface carbon nanotube conductive layer is cooperated, so that the substrate has high hydrophobicity, excellent conductivity and flexible tensile property. The preparation method has the characteristics of controllable process, low cost and environmental friendliness, and the obtained substrate is expected to have wide application prospects in the fields of food packaging, sensor substrates, intelligent wearing, health monitoring and the like.

The invention discloses a preparation method of high-temperature-resistant hydrophobic aerogel. The preparation method comprises the following preparation steps: (1) adding acid into a mixed solution of organic estersil or organic silicon and alcohol, controlling the pH value to 2-5.5, then adding silica sol, and stirring to obtain hydrolysate A; wherein the silica sol is a mixture of first silica sol with the D50 particle size of 8-20 nm and second silica sol with the D50 particle size of 50-100 nm; (2) adding a basic catalyst into the hydrolysate to obtain a sol substance B; (3) adding an opacifying agent and a flame retardant into the sol substance B to obtain a sol substance C; and (4) carrying out gelation, aging, hydrophobic modification and drying on the sol C to prepare the aerogel. The aerogel provided by the invention has excellent hydrophobic performance and extremely low water absorption rate at high temperature.

The invention discloses high-hydrophobicity bamboo powder, a modification method and a composite material, and belongs to the technical field of bamboo processing and composite materials. According to the method, a phenyl silane coupling agent is hydrolyzed under the conditions of the specific pH value and the alcohol-water volume ratio, bamboo powder is subjected to coating treatment at the room temperature, a gel layer is formed on the surface of the bamboo powder, the bamboo powder is changed from hydrophilicity to hydrophobicity, the water contact angle is larger than or equal to 90 degrees, and meanwhile the initial thermal decomposition temperature is remarkably increased. The method is simple in process and environmentally friendly, and the obtained modified bamboo powder is suitable for the fields of plastics, rubber and other composite materials.

The invention belongs to the field of RAFT (reversible addition-fragmentation chain transfer) polymerization reaction, and particularly discloses a macromolecular RAFT polymer, a preparation method and application of the macromolecular RAFT polymer in RAFT reaction. The macromolecular RAFT polymer at least comprises a block Z-[A] x-b-[B] y; wherein Z is a small molecule RAFT group; the block [A] x is formed by double-bond addition polymerization of hydrophilic monomers, and the hydrophilic monomers are C7-C20 quaternary ammonium salt monomers and / or sulfonate monomers; the block [B] y is formed by double-bond addition polymerization of a hydrophobic monomer, and the hydrophobic monomer is a C10-C22 methacrylate or acrylate monomer. The hydrophilic monomer with the quaternary ammonium salt monomer and / or the sulfonate monomer is selected to construct the hydrophilic chain segment, and meanwhile, the C10-C22 acrylate monomer / methacrylate monomer with strong hydrophobicity is introduced, so that the emulsifying property of the macromolecular RAFT reagent is improved.

The invention relates to the technical field of packaging materials, in particular to a manufacturing method of an industrial byproduct semi-hydrated gypsum hollow plastic plate. The plastic plate is prepared from the following components in parts by weight: 60 to 70 parts of superfine modified semi-hydrated phosphogypsum powder, 28 to 35 parts of polypropylene resin, 0.5 to 1.5 parts of slipping agent, 0.5 to 1.5 parts of dispersing agent, 0.5 to 1.5 parts of antistatic agent, 0.3 to 0.8 part of antioxidant, 5 to 10 parts of calcium oxide and 3 to 6 parts of polyolefin elastomer. The gypsum powder subjected to purification, calcination and quaternary ammonium / stearic acid surface treatment has oleophylic and hydrophobic properties, and 65% high-proportion filling can be realized; the light moisture-proof plate with the density of 0.75-0.95 g / cm < 3 > and the thickness of 3-6 mm is obtained by matching with a double-screw granulation process and a single-screw hollow plate extrusion process, the use amount of resin is reduced, the mechanical property and the heat resistance are obviously superior to those of a single surface modifier, and high-value utilization of ardealite resources is realized.

The present disclosure generally relates to compositions and methods of simultaneously making two unique biointermediates from a single lignocellulosic biomass feedstock, including a hydrophobic biohydrocarbon and a water insoluble hydrophilic cellulosic biopolymer for use in the production of renewable fuels, chemicals, and other carbon neutral materials commonly derived from petroleum and other fossil resources.

The precise molecular sieving architectures with Janus-like characteristics via an interpenetrating polymer network combining the hydrophilic cPI polymer and hydrophobic microporous covalent organic framework (COF) exhibit super-high permeances for both polar and nonpolar solvents. A unidirectional diffusion and convection process significantly speeds up chemically stable COFs with uniform and tailorable channels growing on polymeric hollow fibre that can efficiently separate organic solvents under ultrafiltration conditions.

The invention provides a hydrophilic modified porous graphite-based phase change heat storage material and a preparation method thereof, and relates to the technical field of phase change heat storage materials. The hydrophilic oxide layer is constructed on the pore surface of the porous graphite, so that the porous graphite is changed from hydrophobicity to hydrophilicity, and the application limitation caused by original strong hydrophobicity is effectively overcome. The oxide layer is stable in property in a high-temperature environment, the applicable temperature range of the material is remarkably widened, erosion of oxygen to a carbon skeleton can be blocked, the structural integrity of the porous graphite is protected, and the service life of the material is prolonged. The high-enthalpy polar phase change material can be efficiently compounded with the hydrophilic modified porous graphite in a solution spontaneous impregnation manner by virtue of good flowability and permeability of an aqueous solution of the high-enthalpy polar phase change material, so that the preparation process is greatly simplified. The finally prepared hydrophilic modified porous graphite-based phase change heat storage material has high thermal conductivity and high heat storage density, shows excellent comprehensive performance, and solves the problem that a polar phase change substance with a high enthalpy value is difficult to be effectively compounded with porous graphite.

The invention discloses a core-shell structure P (MMA-MBA) copolymer heat-storage phase-change microcapsule, the microstructure is of a spherical structure, the core-shell structure is adopted, the core structure is hexadecane, the shell structure is a methyl methacrylate (MMA) and N, N-methylene bisacrylamide (MBA) copolymer, the emulsifier is lauryl sodium sulfate (SDS), the initiator is potassium persulfate, and the pH value of the core-shell structure P (MMA-MBA) copolymer heat-storage phase-change microcapsule is 7-8. And the coating efficiency is 70-75%. The preparation method comprises the following steps: 1, preparing an oil phase and a water phase; and 2, polymerization reaction of the microcapsule. A phase change cement material based on a core-shell structure P (MMA-MBA) copolymer heat storage phase change microcapsule is prepared by compounding the P (MMA-MBA) copolymer heat storage phase change microcapsule and a cement matrix, and has hydrophobicity; obvious weightlessness exists in two times.

The present invention provides a modified silica aerogel powder having a higher water repellency and a larger contact angle, and a method for producing the same. At the same time, the present invention provides an aerogel slurry having a lower thermal conductivity and a method for producing the same. The present invention also provides a method for producing an aerogel insulating felt having low thermal conductivity, high mechanical strength, and capable of relatively well resolving the problem of powder shedding. The method for producing the modified silica aerogel powder includes the steps of (1) modifying halloysite nanotubes with dodecyl methacrylate and pentafluorophenyl methacrylate, (2) preparing a silica sol, (3) adding the modified halloysite nanotubes to the silica sol to prepare a wet gel, and (5) preparing the wet gel into the modified silica aerogel powder. The present application also provides a method for producing an aerogel slurry from the modified silica aerogel powder, and a method for producing an aerogel insulating felt from the aerogel slurry.

To provide a defoaming agent capable of exhibiting excellent defoaming properties (foam breaking and foam suppressing effects) and excellent surface finishing properties (cissing and foam breaking marks).SOLUTION: And at least one hydrophobic substance (C) selected from the group consisting of hydrophobic silica, fatty acid metal salts, fatty acid amides, and waxes, wherein the content of the liquid glycerin fatty acid ester (A) is 4 to 49% by weight, the content of the liquid alkylene oxide adduct (B) is 51 to 96% by weight, and the content of the hydrophobic substance (C) is 0.1 to 15% by weight, based on the weight of the liquid glycerin fatty acid ester (A) and the liquid alkylene oxide adduct (B).SELECTED DRAWING: None

The present invention relates to the technical field of polyurethane coatings, and in particular to a polyurethane coating with sufficient tack-free dryness and a preparation method therefor. In the present invention, ethylene glycol, potassium methoxide, and glycidol are used to prepare a branched polyglycidyl ether and silicon dioxide is modified using the branched polyglycidyl ether. The addition of the branched polyglycidyl ether improves the compatibility of the modified silicon dioxide in a modified polyurethane emulsion, thereby enhancing the hydrophobicity and corrosion resistance of the coating. The backbone of the branched polyglycidyl ether has a high molecular weight, providing a large number of crosslinking sites, and by adding the branched polyglycidyl ether-modified silicon dioxide to the polyurethane coating, the water resistance of the polyurethane coating is enhanced. In the present invention, benzotriazole is also loaded on the silicon dioxide as a corrosion inhibitor, thereby imparting a corrosion-resistant effect to the coating.

The building block is prepared from the following raw materials in parts by weight: 30 to 60 parts of ardealite, 0.5 to 2 parts of lime, 10 to 30 parts of slag, 0 to 2.5 parts of silica fume, 0 to 2.5 parts of fly ash, 1 to 5 parts of cement, a water reducing agent with the mass ratio of 0.5 to 1.5 percent of ardealite, 8 to 12 parts of water, 10 to 20 parts of an acrylic acid metal salt mixed solution, 0.5 to 2.5 parts of a water repellent agent and 15 to 50 parts of aggregate, the acrylic acid metal salt mixed solution contains calcium ions or / and magnesium ions; through the in-situ polymerization synergistic effect among the cement, the lime, the inorganic active material and the acrylic acid metal salt solution, the inorganic-organic hybrid gel efficiently and stably solidifies the phosphogypsum, harmful ions are converted into insoluble and thermodynamically stable forms, and efficient and stable phosphorus, fluorine and heavy metal immobilization is achieved. The mixing amount of the phosphogypsum is as high as 30-60%, the building block has good mechanical properties, the 28-day compressive strength of the building block is greater than or equal to 30 MPa, and the breaking strength is greater than or equal to 3.5 MPa; and through surface modification treatment of the hydrophobic agent, a hydrophobic film is formed on the surface of the ardealite, the hydrophobic performance of the surface of the ardealite is enhanced, the water resistance of the ardealite is improved, and the water absorption rate of the building block is less than or equal to 5.0%. And the preparation process has the advantages of low cost, simplicity and convenience in operation, environment friendliness and the like.

The invention discloses high-wear-resistance HFBMA (hexafluorobutyl methacrylate) acrylic resin and a preparation method thereof. The high-wear-resistance HFBMA acrylic resin is prepared from the following components in percentage by mass: 30 to 40 percent of styrene, 8 to 15 percent of hydroxypropyl ester, 8 to 15 percent of propyl butyl ester, 0.3 to 1.5 percent of methacrylic acid, 0.5 to 2 percent of initiator, 3 to 10 percent of hexafluorobutyl methacrylate (HFBMA), 2 to 8 percent of organic silicon monomer or POSS (polyhedral oligomeric silsesquioxane) and 25 to 35 percent of xylene. According to the experiment, the optimal raw material composition and proportion are obtained through screening of a large number of experiments, the optimal synthesis process is obtained through optimization of a large number of experiments, and the conversion rate reaches 98.8% or above. The acrylic resin disclosed by the invention has excellent wear resistance, weather resistance, chemical resistance, high hardness, high adhesive force and excellent hydrophobicity and anti-fouling performance, and the comprehensive performance is remarkably and technically improved.

The invention relates to preparation of hydrolyzed keratin capable of maintaining hair and application of the hydrolyzed keratin in shampoo. The shampoo capable of maintaining the hair and the keratin is prepared by compounding a surfactant, a modified silicone oil graft polymer, the hydrolyzed keratin and polydimethylsiloxane. According to the modified silicone oil graft polymer, hydrophilic sodium acrylate and hydrophobic N-vinyl pyrrolidone and acrylic ester are introduced into vinyl silicone oil, and N-vinyl pyrrolidone and acrylic ester can be adsorbed on the inner side of the hair surface; sodium acrylate with hydrophilicity is located on the outer side of the surface of the hair due to electrostatic repulsion between the negatively-charged hair and generates hydration with water molecules on the surface of the hair to form a water shell protection layer, so that the sodium acrylate can be more uniformly distributed on the hair to form an effective protection film, and during washing, the water washing property is greatly enhanced by the hydrophilic part of the sodium acrylate; non-specific deposition and residues in a scalp area are remarkably reduced, and the washed hair can be moisturized and lubricated.

The invention relates to a melamine sponge with a chitosan-wheat straw biochar coating as well as a preparation method and application of the melamine sponge. The preparation method comprises the following steps: crushing wheat straws, and pyrolyzing under an anaerobic condition to obtain biochar; the biochar is soaked in a Prussian blue dispersion liquid for modification, and Prussian blue modified biochar is obtained; dispersing the material in a chitosan acetic acid solution for reaction to form a chitosan-charcoal composite system; adding PDMS (Polydimethylsiloxane) to carry out siloxane reaction to form stable composite sol; and finally, spraying the composite sol on the surface of the pretreated melamine sponge to form the super-hydrophobic coating. Through the synergistic effect of Prussian blue, chitosan and PDMS, the hydrophobicity and oil adsorption capacity of the material are remarkably improved, the water contact angle of the obtained sponge material can reach 168 degrees, the adsorption capacities to normal hexane and chloroform respectively reach 34 g / g and 80 g / g, and the sponge material has good cycle stability and wide application prospects in the fields of oil-water separation and environmental pollution treatment.

The invention discloses a hydrophobic gas diffusion electrode loaded with silver nanoparticles and application of the hydrophobic gas diffusion electrode in electrocatalytic carbon dioxide reduction, and belongs to the technical field of electrocatalysis. The hydrophobic gas diffusion electrode comprises a gas diffusion layer and a catalyst layer sprayed on the gas diffusion layer; the catalyst layer comprises a silver nanoparticle catalytic material, a first ionomer and a second ionomer; wherein the first ionomer is a fluororesin ionomer, and the second ionomer is a quaternized polysulfone ionomer. A system for preparing CO by reducing CO2 through electro-catalysis is constructed, the system comprises an MEA electrolytic cell, a cathode, an anode and an anion exchange membrane, and the cathode adopts the hydrophobic gas diffusion electrode loaded with the silver nanoparticles. The preparation method is mild in preparation condition and environmentally friendly, the modified hydrophobic gas diffusion electrode has high hydrophobicity, efficient conversion of CO2 can be achieved under the high current density, FECO can reach 96.5% under the high current density, and excellent catalytic performance is shown.

The invention relates to the technical field of functional coatings, and discloses a preparation method of a composite aerogel thermal insulation coating, which comprises the following steps: controlling the solubility parameter difference between film-forming resin and a first solvent, and curling and shrinking a resin molecular chain to form a swelling gel group in a non-dissolved state; performing dry powder grading on the hydrophobic silicon dioxide aerogel powder and the high-strength hollow glass beads; under the conditions of low temperature and high viscosity, shearing and kneading the swelled gel group, a silane coupling agent and the mixed powder, and carrying mechanical stress and completing interface chemical anchoring by using glass beads; and finally, dropwise adding a good solvent in a gradient manner to induce controlled unwrapping of the resin. According to the invention, the size exclusion effect is utilized to prevent the resin from immersing into aerogel nanopores, and the aerogel skeleton is prevented from being broken through the mechanical support of the microbeads, so that the problems of pore filling and skeleton collapse in the coating preparation process are solved, and the obtained coating has excellent heat insulation performance and mechanical strength.

The invention discloses a coated sulfide solid electrolyte as well as a preparation method and application thereof. The coated sulfide solid electrolyte comprises sulfide solid electrolyte particles and a surface hydrophobic layer coating the sulfide solid electrolyte particles. Thus, the hydrophobic solvent and the sulfide solid electrolyte are tightly combined through intermolecular interaction force (O-S, S-S and I-S), the surface of the sulfide solid electrolyte is wrapped with the hydrophobic solvent, a surface hydrophobic layer of the sulfide solid electrolyte is formed, high ionic conductivity and good processability of the sulfide solid electrolyte are kept, and meanwhile, the surface hydrophobic layer of the sulfide solid electrolyte is formed. The reactivity of the sulfide solid electrolyte and air is effectively inhibited, and the core bottleneck that the sulfide solid electrolyte is sensitive to air and is easier to lose efficacy after being refined is systematically solved. The synergistic improvement of stability, interface performance and process feasibility is realized, and a key material support is provided for commercialization of sulfide all-solid-state batteries.

Provided in the present disclosure are a solid electrolyte, a preparation method therefor and a secondary battery. The solid electrolyte comprises an oxide solid electrolyte and a shell layer coating the surface of the oxide solid electrolyte, wherein the shell layer comprises a monomer polymer and an ionic liquid. The monomer polymer is obtained by copolymerizing a first polymeric monomer and a second polymeric monomer, wherein the first polymeric monomer comprises one or more of ethylene glycol monomethyl ether acrylic acid, ethylene glycol monomethyl ether methacrylate, ethylene glycol monoethyl ether methacrylate and ethylene glycol monopropyl ether methacrylate; and the second polymeric monomer comprises a fluoroacrylate. F doping is firstly selected to modify LATP in the present disclosure, thereby significantly improving the ionic conductivity of the LATP, and widening the electrochemical window thereof, which is beneficial to improving the hydrophobicity thereof. The inner structure selected in the present disclosure is an LATP material doped with F, which can form better attraction to a C-containing group in the coating layer and cations of the ionic liquid, thereby improving the coating effect of the outer layer.