7688 results about "Hydrophobe" patented technology

The invention discloses a core-shell structure flame retardant with a thermo-oxidative aging resistance function and application of the core-shell structure flame retardant in preparation of a flame-retardant material, and belongs to the technical field of flame retardance. The core-shell structure flame retardant with the thermo-oxidative aging resistant function is composed of the core and the shell structure, the core is the flame retardant, the shell structure is a polymer containing hindered phenol and low-valence phosphorus, on one hand, hydrophobicity of the flame retardant can be improved, on the other hand, compatibility and dispersity of the flame retardant in a polymeric material can be improved, and the flame retardant performance is improved. Further, the flame retardant property and the mechanical property of the polymer material are improved. Besides, hindered phenol and low-valence phosphorus in the shell polymer not only can capture RO.and ROO.free radicals and inhibit the thermo-oxidative aging process of the polymer, but also can play a role in capturing the free radicals in the combustion process, so that the flame retardant property of the polymer material is further improved. The flame retardant disclosed by the invention has excellent flame retardance and thermal aging resistance, and can be applied to the fields of buildings, traffic, chemical engineering, machinery, communication, energy sources and the like.

The invention relates to the technical field of polyurethane production, in particular to a polyurethane super-hydrophobic foam composite material for packaging and a preparation method thereof. The polyurethane super-hydrophobic foam composite material for packaging is prepared by reacting a component A and a component B according to a mass ratio of 100: (31.7-46.5), wherein the component A comprises polyether polyol X with high molecular weight and high activity, polymer polyol, a chain extender, a cross-linking agent, an organic metal catalyst, a tertiary amine catalyst, a foam stabilizer, a foaming agent, a flame retardant, inorganic filler and the like, and the component B is isocyanate modified by polyether polyol Y with high functionality. An ester bond, a rigid benzene ring group and a Si-O-Si chain segment are introduced into a polyether polyol molecular chain segment to improve the internal soft segment structure and chemical crosslinking density of the polyurethane foam, and the prepared super-hydrophobic polyurethane foam not only has excellent hydrophobicity and high temperature resistance, but also is low in density and good in mechanical property.

The invention discloses a bio-based foam adsorption material as well as a preparation method and adsorption application thereof. The bio-based polymer is used as a foam skeleton, the adsorbent with a large specific surface area is added to further improve the foam adsorption capacity, the cross-linking agent and the reinforcing filler improve the overall strength of the foam, and the bio-based foam adsorption material with the high adsorption capacity is obtained. The bio-based foam disclosed by the invention is light in weight, controllable in hydrophilicity and hydrophobicity, and capable of separating and removing pollutants such as oil and organic dye. The foam has high adsorption capacity and good cyclic adsorption capacity, can be repeatedly used, is biodegradable, does not pollute the environment, can effectively adsorb dangerous chemicals existing in a water body, does not cause secondary pollution, and can be used for decontamination treatment of organic pollutants in industrial wastewater.

The invention provides a bismuth oxide-based epoxy resin composite material with a radiation shielding function as well as a preparation method and application of the bismuth oxide-based epoxy resin composite material. According to the preparation method disclosed by the invention, the bismuth oxide is subjected to surface modification, and after surface grafting modification by the coupling agent, the surface of the bismuth oxide is changed from strong hydrophilicity to strong hydrophobicity, so that the dispersity and interfacial compatibility of the bismuth oxide in an organic medium are remarkably improved. Secondly, preparing the composite material from the modified bismuth oxide, epoxy resin and a curing agent through a mechanical blending-vacuum defoaming combined process. On one hand, bismuth oxide, epoxy resin and a curing agent are uniformly mixed through mechanical blending; on the other hand, bubbles generated in the blending process are removed through vacuum negative pressure. The bismuth oxide in the composite material is uniformly distributed, no bubble exists in the body, and the surface is smooth and complete, so that the composite material has excellent gamma-ray shielding performance and good mechanical property. The process is simple, the yield is high, the product property is stable, and good economic benefits and environmental benefits are achieved.

The invention provides hydrophobic silica wet gel, hydrophobic silica aerogel, and methods that can be used to form an enhanced hydrophobic silica aerogel sheet having an advantageous combination of properties. Some embodiments of the invention provide a hydrophobic silica aerogel having advantageous properties, such as desirable performance on visible transmission, haze, or both.

The invention discloses a preparation method of injectable nano composite hydrogel for relieving osteoarthritis, which comprises the following steps: firstly, synthesizing nano rod-like hydroxyapatite with the length of 150-300 nm and the diameter of 10-15 nm, and the hydroxyapatite is hydrophilic hydroxyapatite doped with strontium and europium ions; the preparation method comprises the following steps: by taking Ca (NO3) 2, Sr (NO3) 2, Eu (NO3) 3 and soluble phosphate as main raw materials, carrying out hydrothermal reaction to prepare strontium and europium ion co-doped hydrophobic hydroxyapatite, dispersing the strontium and europium ion co-doped hydrophobic hydroxyapatite in a Tris-HCl buffer solution, adding tannic acid, stirring, centrifugally collecting precipitate, and drying to obtain strontium and europium ion doped hydrophilic hydroxyapatite; the preparation method comprises the following steps: taking chondroitin sulfate and adipic dihydrazide as main raw materials, stirring, dialyzing, freeze-drying, and dissolving in a buffer solution to obtain the chondroitin sulfate solution grafted with the hydrazide group; the preparation method comprises the following steps: taking hyaluronic acid, 3-aminophenylboronic acid and sodium periodate as main raw materials, stirring, dialyzing, freeze-drying, and dissolving in a buffer solution to obtain the phenylboronic acid group grafted oxidized hyaluronic acid solution; the preparation method comprises the following steps: blending hydrophilic hydroxyapatite doped with strontium and europium ions, a chondroitin sulfate solution grafted with a hydrazide group, an oxidized hyaluronic acid solution grafted with a phenylboronic acid group and a recombinant collagen solution, and stirring to obtain the injectable nano composite hydrogel. The injectable nano composite hydrogel obtained by the invention has good biocompatibility, and a favorable local immune microenvironment can be created to immunomodulate macrophages so as to relieve osteoarthritis and promote subchondral bone repair.

The invention relates to the technical field of coating materials, and discloses a preparation method of a nano silicon dioxide / fluorocarbon resin durable super-hydrophobic composite coating and application of the nano silicon dioxide / fluorocarbon resin durable super-hydrophobic composite coating on a wind turbine blade. The adhesive force of the coating on the base material is enhanced; in the second step, an inorganic particle-organic resin hybrid state is formed by spraying a super-hydrophobic modified SiO2 dispersion liquid and combining a nano-particle self-settling assembly technology, required roughness and low surface energy are given to the coating, and conversion from hydrophobicity to super hydrophobicity is achieved.

The invention provides hydrophobic silica wet gel, hydrophobic silica aerogel, and methods that can be used to form an enhanced hydrophobic silica aerogel sheet having an advantageous combination of properties. Some embodiments of the invention provide a hydrophobic silica aerogel having advantageous properties, such as desirable performance on visible transmission, haze, or both.

The invention belongs to the technical field of polyurethane pouring sealants, and particularly relates to a two-component hydrophobic heat-resistant polyurethane pouring sealant and a preparation method thereof. The pouring sealant is prepared by reacting a component A and a component B, the component A is prepared from the following raw materials in parts by weight: 17 to 33 parts of modified polyether polyol I; 15 to 27 parts of modified polyether polyol II; 18 to 30 parts of diisocyanate; 20 to 34 parts of a plasticizer; the component B is prepared from the following raw materials in parts by weight: 47 to 64 parts of polyether polyol III; 36 to 53 parts of filler; and 0.15 to 0.35 part of a catalyst. Introducing a silicon-oxygen-silicon chain segment into a polyether polyol structure through acrylic acid bridging to prepare siloxane modified polyether polyol; more side ethyl, phenyl and neopentyl structures are introduced into the polyether polyol, so that the intrinsic hydrophobicity and temperature resistance of the raw materials are further improved, and the polyurethane pouring sealant shows relatively high hydrophobicity and heat resistance.

The invention discloses a high-biocompatibility pH response type Pickering emulsion and a preparation method thereof, and relates to the technical field of food and materials. An interfacial film with high mechanical strength is constructed by adopting electrostatic interaction and hydrophilic-hydrophobic complementary characteristics between the hydrophobic shellac nanoparticles carrying negative charges and the hydrophilic cationic colloidal particles carrying positive charges, and the prepared emulsion has good viscoelasticity and stability. In addition, due to the unique solubility of the shellac nanoparticles, the Pickering emulsion prepared by the preparation method disclosed by the invention has excellent pH responsiveness. The preparation method of the Pickering emulsion is convenient and simple, the stabilizer is wide in source and low in price, the biocompatibility of the emulsion is high, and the Pickering emulsion has wide application prospects in the aspects of food, medicine, materials and the like.

The invention relates to the technical field of wood corrosion prevention and corrosion resistance treatment, in particular to a preparation process of a coating for improving the antibacterial and corrosion-resistant performance of wood. In order to improve the antibacterial and corrosion-resistant capabilities of the prepared coating, a corrosion-resistant antibacterial agent is prepared and added into the raw materials of the coating, and quaternary ammonium salt, guanidyl and other group structures are introduced into the corrosion-resistant antibacterial agent, so that the antibacterial performance on microorganisms such as fungi is realized; the introduction of fluorine can effectively improve the hydrophobicity of a coating of the paint and reduce the influence of water vapor on antibacterial components in the coating, and the introduction of allyl can enable the corrosion-resistant antibacterial agent to react with butyl acrylate and other raw materials under the action of an initiator to achieve the cross-linking ability, so that the loss of the corrosion-resistant antibacterial agent is effectively avoided, and the service life of the coating is prolonged. The antibacterial activity is kept for a long time.

A blood pump with a stator and rotor wherein the rotor is assembled by bonding the stator components with epoxy. The bonding surfaces of the rotor components are primed with a silane-based primer to improve adhesion between the primer and the rotor components by rendering such surfaces hydrophobic. A bonding surface of one of the stator yoke or the stator sleeve, or both, is treated with a primer that improves wettability of the bonding surface and improves bonding of the epoxy to the binding surface. The device has a bonding surface adhered to epoxy in which a primer was applied on such bonding surface prior to introducing epoxy onto the bonding surface. In addition to improved bond strength, hydrophobic surface would control moister ingress.

The invention discloses a method for preparing a high-stability W / O / W type multiple Pickering emulsion based on Janus particles, and belongs to the technical field of colloid and interface chemistry. According to the preparation method, the Janus particles with different hydrophilic and hydrophobic properties are prepared by using alkylsilane modified SiO2 with different chain lengths, the multiple emulsion is stabilized together, different types of Janus particles are adsorbed on different oil-water interfaces, and the interface activity and amphipathicity of the Janus particles are fully exerted to prepare the high-stability multiple emulsion. The multi-emulsion provided by the invention has excellent stability, keeps stable under the conditions of long-term storage, strong acid, strong alkali, high-concentration electrolyte and the like, and can effectively expand the practical application of the multi-emulsion.

The invention discloses an amphiphilic carbon dot, a clean fracturing fluid and application of the clean fracturing fluid. The amphiphilic carbon dot is prepared by performing solvothermal reaction on organic acid and a hydrophobic aliphatic compound. According to the amphiphilic carbon dots provided by the invention, simple preparation of the amphiphilic carbon dots with different structures and properties can be realized by changing the types of the hydrophobic aliphatic compounds, and the clean fracturing fluid prepared by utilizing the amphiphilic carbon dots not only has high temperature resistance and is suitable for reservoirs with relatively high temperature, but also has high salt resistance, so that the clean fracturing fluid can be used for preparing the clean fracturing fluid. And the fracturing fluid has a good fracturing effect in hydrofracture operation of low-permeability and high-salinity oil reservoirs.

The invention discloses a hydrophobic and oleophobic modified epoxy resin, which is prepared from the following components in parts by mass: 2 to 5 parts of thiolactone terminated fluorinated prepolymer, 15 to 16 parts of 4, 4 '-diaminodiphenylmethane, 0.13 to 0.14 part of base catalyst, 25 to 26.5 parts of epoxy resin and the balance of tetrahydrofuran solvent, wherein the thiolactone-terminated fluorinated prepolymer is prepared from thiolactone acrylamide, fluorinated acrylate and a photoinitiator in a mass ratio of (2-3): 1: (0.07-0.09) through a free radical polymerization copolymerization chemical reaction under the induction of ultraviolet light, and the thiolactone-terminated fluorinated prepolymer is obtained; wherein thiolactone acrylamide is prepared from DL-homocysteine thiolactone hydrochloride, a NaHCO3 solution and acryloyl chloride according to the mass ratio of 1: (1.3-1.5): (1.1-1.3), the oleophobic and hydrophobic modified epoxy resin provided by the invention effectively solves the problem that an epoxy resin coating in the prior art is poor in oleophobic performance and hydrophobic performance, and the oleophobic and hydrophobic modified epoxy resin has the advantages that the oleophobic and hydrophobic properties of the epoxy resin coating are improved; therefore, the oleophobic and hydrophobic properties of the epoxy resin coating are improved.

The invention provides hydrophobic silica wet gel, hydrophobic silica aerogel, and methods that can be used to form an enhanced hydrophobic silica aerogel sheet having an advantageous combination of properties. Some embodiments of the invention provide a hydrophobic silica aerogel having advantageous properties, such as desirable performance on visible transmission, haze, or both.

The invention belongs to the technical field of polyurethane soft foam, and particularly relates to hydrophobic high-strength polyurethane soft foam as well as a preparation method and application thereof. The hydrophobic high-strength polyurethane soft foam is composed of a component A and a component B according to the mass ratio of 100: (58-60), and the component A comprises the following raw materials: vegetable oil modified polyester polyol, silane modified polyether polyol, silicone oil, a catalyst, a chain extender and a foaming agent; and the component B comprises the following raw materials and polymerization inhibitors: polyether polyol 1, hydroxyl fluorosilicone oil, pure MDI and liquefied MDI. The hydrophobic high-strength soft polyurethane foam has excellent mechanical property, hydrophobic property and anti-aging property, and also has good elasticity and wear resistance, and when the hydrophobic high-strength soft polyurethane foam is applied to a mouse pad, foam holes are fine, the hydrophobic property is good, and the market demand is met; the invention also provides a preparation method thereof.

The invention discloses a super-wear-resistant super-hydrophobic coating in the technical field of coatings, the super-wear-resistant super-hydrophobic coating comprises a primer and a finishing coat, the primer comprises solvent-free aliphatic polyether polyol resin, micro-powder particles, di-tetratoluene diisocynate, fumed silica nanoparticles and a primer magnetic attraction material; the finishing paint comprises hydrophobic nanoparticles, a diluent, a finishing paint magnetic attraction material and a hydrophobic treatment agent, the primer magnetic attraction material is ferrite powder, and the finishing paint magnetic attraction material is nickel powder. The preparation method comprises the following steps: 1, preparing the primer; secondly, primer is sprayed; step 3, roughening the primer; 4, finish paint is manufactured; step 5, spraying finish paint; and step 6, detecting the performance of the coating. The preparation method is scientific and reasonable, the uniformity and stability of the coating in the preparation and coating process are ensured by optimizing the composition of the coating material, improving the preparation process and introducing a magnetic suction device, and therefore the wear resistance, hydrophobicity and adhesive force of the coating are improved.

The invention discloses a multifunctional composite hydrophobic membrane and a preparation method thereof, in the hydrophobic membrane, nano silicon dioxide, hydroxyl multi-walled carbon nanotubes and perfluorooctyl ethyl acrylate are polymerized to obtain a modified composite material, the modified composite material is added into a polyvinylidene fluoride-hexafluoropropylene copolymer, fibers are formed through an electrostatic spinning method, the fibers are deposited on a polyester net base lining, and the multifunctional composite hydrophobic membrane is prepared. Nano-silica and hydroxyl multi-walled carbon nanotubes are modified, agglomeration is effectively avoided, the hydrophobic membrane has good mechanical strength and toughness, and microcosmic multi-dimensional roughness of the surface of the membrane can be achieved by introducing an inorganic-organic nano hybrid material. Fluorine atoms in a perfluorooctyl ethyl acrylate structure have relatively low surface energy, so that the surface energy of the film can be remarkably reduced, the surface of the film has low surface energy and a rough structure, and the film is high in hydrophobicity and good in chemical stability.

The invention relates to the technical field of CO2 capture and separation, and particularly discloses an anhydrous absorbent with a self-extraction function as well as application and a recovery method. The anhydrous absorbent is synergistically composed of a mixed amine absorption enhancer with specific composition and a hydrophobic organic solvent, wherein the mixed amine absorption enhancer comprises primary amine, secondary amine and tertiary amine. The mixed amine absorption accelerant combines the advantages of high reaction activity of primary amine, low regeneration heat of secondary amine and high absorption capacity and strong hydrophobicity of tertiary amine, so that the anhydrous absorbent shows excellent self-extraction capacity in the adsorption and desorption processes of acid gas, particularly, the anhydrous absorbent after absorbing the acid gas forms a less-water CO2 rich phase, and the CO2 rich phase has excellent self-extraction capacity. And due to the characteristic of less water, sensible heat and latent heat of vaporization required by a rich phase in a CO2 desorption stage are remarkably reduced, so that the problem that the energy consumption is too high in the regeneration process of the existing water-based absorbent is effectively solved.

The present invention provides a formulation method for encapsulating a negatively charged or hydrophobic target agent by lipid nanoparticles (LNPs). The formulation method comprises impinging an organic phase solution having an ionizable or cationic lipid and an aqueous phase solution. The target agent may be in the organic or aqueous phase solution. The formulation method further comprises self-assembling LNPs, each of which comprises a lipid membrane formed having the ionizable or cationic lipid, whereby the target agent is entrapped by the ionizable or cationic lipid and encapsulated by the LNPs. Also provided is an LNP comprising two or more negatively charged or hydrophobic target agents entrapped by an ionizable or cationic lipid and encapsulated by the LNP. Further provided are the uses of LNPs for intracellular delivery and for stimulating an immune response.

The invention discloses a super-hydrophobic anti-icing coating for a power transmission line and a preparation method, and belongs to the technical field of preparation of anti-icing coatings. The super-hydrophobic anti-icing coating for the power transmission line is composed of a coating wrapping the surface of the power transmission line, and the coating is composed of the following components in parts by weight: 34-45 parts of composite resin, 8-14 parts of a composite ice melting agent, 10-18 parts of deionized water, 1-3 parts of hexadecyl trimethoxy silane and 50-58 parts of tetrahydrofuran, the composite resin is prepared from carboxyl multi-walled carbon nanotubes, isopropanol, tetraethoxysilane, a silane coupling agent KH-550, perfluorodecyl trimethoxysilane, butyl acrylate, methyl methacrylate and dodecafluoroheptyl methacrylate, and the composite ice melting agent is prepared from pyridine-2, 6-dicarboxylic acid, thionyl chloride and nicotinic acid hydrazide. The coating prepared by the method has excellent hydrophobicity, wear resistance and anti-icing effect.

The invention belongs to the technical field of paint coatings, and particularly relates to a hydrophobic heat-conducting self-repairing coating and a preparation method thereof. The preparation method of the hydrophobic heat-conducting self-repairing coating comprises the following steps: ultrasonically dispersing a heat-conducting filler and polyethylene glycol in an organic solvent, dropwise adding into a water-borne epoxy resin solution, and stirring to obtain a heat-conducting coating solution; the method comprises the following steps: dropwise adding a liquid A containing polysiloxane and a fluorine-containing monomer into a liquid B containing polyethylene glycol, stirring, carrying out centrifugal suction filtration, and drying to obtain the self-repairing microcapsule. Then adding the self-repairing microcapsules and silicon dioxide into the fluorine-containing polymer solution and / or the hydrophobic resin solution, and carrying out ultrasonic dispersion to prepare a self-repairing hydrophobic coating solution; the heat-conducting coating liquid and the self-repairing hydrophobic coating liquid are uniformly sprayed or spin-coated on the surface of a metal base material in sequence and then are subjected to UV curing, and the hydrophobic heat-conducting self-repairing coating is prepared. According to the method, the process and raw materials are simple, and the prepared coating has heat conduction and self-repairing performance and is excellent in anti-aging performance.

The invention discloses a flame-retardant PMMA (polymethyl methacrylate) plate and a preparation method thereof, and belongs to the technical field of acrylic plates. Comprising the following raw materials in parts by weight: 70-80 parts of methyl methacrylate, 8-12 parts of methyl acrylate, 5-15 parts of a synergistic flame retardant, 10-18 parts of modified nano silicon dioxide, 0.2-0.4 part of an initiator and 3-5 parts of a release agent. Wherein the modified nano silicon dioxide is high in surface hydrophobicity and better in compatibility with a PMMA matrix, so that the wear resistance and the mechanical property of the PMMA plate are greatly enhanced; wherein the synergistic flame retardant can enhance the mechanical property of the PMMA plate, in addition, molecules contain three elements of silicon, nitrogen and phosphorus, and the three elements can achieve a synergistic effect, so that the flame retardance of the plate is remarkably improved, and the stability is good; therefore, the PMMA plate prepared by the invention is good in wear resistance and excellent in mechanical property, also has stable and efficient flame retardance, and has important application value in the technical field of acrylic plates.

The invention provides a PDMS-based double-layer hydrophobic anti-reflection self-cleaning coating and a preparation method thereof, and relates to the technical field of hydrophobic materials, the preparation method comprises the following steps: adding polydimethylsiloxane (PDMS) and a PDMS curing agent into n-hexane, uniformly mixing to obtain PDMS sol, and dip-coating the PDMS sol on a hydroxylated substrate as a connecting layer; pDMS, a PDMS curing agent and dibutyltin dilaurate (DBTDL) are added into n-hexane, uniform mixing is performed, then tetraethoxysilane (TEOS) / methyltrimethoxysilane (MTMS) / triethoxymethylsilane (MTES) is added, PDMS-SiO2 sol is obtained, then the PDMS connection layer on the substrate is coated with the PDMS-SiO2 sol in a dip mode, and a PDMS-SiO2 hydrophobic layer is obtained; a carbonization template is introduced into a PDMS (Polydimethylsiloxane)-SiO2 hydrophobic layer by using external flame, and then annealing treatment is performed to obtain the PDMS-based double-layer hydrophobic anti-reflection self-cleaning coating, and the coating realizes coexistence of high hydrophobicity, high durability and high light transmittance.

The application relates to the technical field of thermal insulation materials, and discloses an aerogel thermal insulation material and a preparation method thereof. A polysiloxane derivative containing nitrogen and phosphorus flame-retardant elements in a structure is prepared as a polymer crosslinking monomer, chemical crosslinking is carried out with corn starch, a crosslinked gel liquid is formed, and the corn starch-based aerogel thermal insulation material can be prepared through a freezing and drying process. The corn starch-based aerogel thermal insulation material prepared through the chemical crosslinking method has a uniform pore structure, has the characteristics of aerogel, and has the characteristics of good thermal insulation effect, high mechanical strength, strong hydrophobicity, excellent flame-retardant performance and the like by introducing the flame-retardant elements such as nitrogen, phosphorus and silicon and the hydrophobic Si-O bond into the aerogel structure, so that the further application of the aerogel thermal insulation material in building thermal insulation materials is facilitated.

The invention discloses a conductive and heat-conducting hydrophobic polymer composite membrane as well as a preparation method and application thereof. The method comprises the following steps: preparing a PU nanofiber membrane through an electrostatic spinning technology; then AgNPs is adsorbed on the surface of the PU nanofiber through an interface hydrogen bond, contact thermal resistance and resistance are effectively reduced, MWCNTs are attached to the upper surface and the lower surface of the composite film through suction filtration and hot pressing, a sandwich structure is formed, and hydrophobicity is guaranteed while the resistance and the thermal resistance are further reduced. The resistance and the heat conductivity of the polymer composite film respectively reach 14.8 m omega / sq and 7.9 W (m K) <-1 >, and the water contact angle is 132.8 degrees. The excellent durability of the composite film is guaranteed through strong interface interaction, and the composite film has potential application prospects in multifunctional electric conduction and heat conduction composite materials.

To provide a coated seed capable of contributing to dispersion of work periods by advancing a sowing period to autumn or winter from a conventional cultivation system of sowing in spring.SOLUTION: There is provided a coated seed that makes it possible to suppress germination until an appropriate time while maintaining seed viability by coating the seed with a coating material that can inhibit water absorption, which triggers seed germination, until a temperature is suitable for germination and can be peeled off from the seed at a temperature that allows for growth (for example, a hydrophobic coating material containing a vinyl ether copolymer consisting of repeating units of the following formula (1), where R1 represents an alkyl group having 3 to 10 carbon atoms, and R2 represents a cyclic hydrocarbon group whose basic skeleton is an alicyclic group having 10 to 15 carbon atoms).SELECTED DRAWING: None

The invention relates to a water-soluble carbon chain substance for adjusting transmembrane transport and fluidity of a cell membrane, and preparation and application thereof. The water-soluble carbon chain substance comprises a carbon chain originally having certain water solubility, and the structure of the water-soluble carbon chain substance comprises at least one or more hydrophobic carbon chain parts and one or more hydrophilic groups or residues; the hydrophobic carbon chain part is coupled with water-soluble molecules to form a high-hydrophilicity compound; the water-soluble carbon chain can be used for preventing and treating infections including viruses, bacteria and fungi; anti-aging; the occurrence of neurodegenerative diseases such as Alzheimer's disease is prevented and reduced; by reducing the non-specific phagocytosis of the nano-drug by cells, the effect of the nano-drug on a target focus is enhanced.

The invention discloses a preparation method and application of a hydrophobic core-shell structure catalyst, and the method comprises the following steps: adding a metal oxide and a surfactant into a first solvent to obtain a first dispersion liquid; adding an alkaline solution and a silicon source into the first dispersion liquid to obtain a first turbid liquid; calcining the first turbid liquid to obtain a porous core-shell material of silicon dioxide coated metal oxide; adding the porous core-shell material into a third solvent to obtain a second suspension; and adding an alkaline solution and a silane agent into the second turbid liquid to obtain the hydrophobic core-shell structure catalyst of the hydrophobic silicon dioxide coated metal oxide. The oxidation reaction of the inner core of the silicon dioxide layer does not destroy hydrophobic groups on the outer layer, so that the hydrophobic performance is maintained for a long time, organosilane is grafted on the surface of the silicon dioxide shell layer, inhibition of water vapor on the activity of the catalyst is reduced, and competitive adsorption of water vapor and reaction gas is prevented; the activity and the service life of the catalyst under high-temperature and high-humidity conditions are effectively improved.