336 results about "Hydrophobic polymer" patented technology

The invention provides a high-modulus low-friction heterogeneous gel material as well as a preparation method and application thereof. The heterogeneous gel material is obtained through the steps that hydrophilic monomers are subjected to free radical polymerization in a hydrophobic polymer solution to obtain a heterogeneous polymer with a hydrophobic phase and a hydrophilic phase in a continuous phase separation structure, then the heterogeneous polymer is swelled, and the mass fraction of the hydrophobic phase in the heterogeneous polymer is 20-50%; the molecular weight of the hydrophobic polymer is 8000 to 50000 Da; wherein the tensile modulus of the heterogeneous gel material is 10 MPa-1 GPa, and the friction coefficient of the heterogeneous gel material under the contact pressure of 1 to 50 MPa is 0.005 to 0.03. The heterogeneous gel material has a bicontinuous phase separation structure, so that the technical problem that the mechanical property and the lubricity of a traditional hydrophilic material are mutually restricted and are difficult to balance can be effectively solved.

A sodium secondary battery positive electrode material and a preparation method therefor, a positive electrode sheet, a sodium secondary battery, and an electric device. The sodium secondary battery positive electrode material comprises a sodium-containing positive electrode material and a coating material located on at least part of the surface of the sodium-containing positive electrode material, wherein the coating material comprises a hydrophobic polymer.

The invention belongs to the technical field of fuel cells, and relates to a microporous layer with a humidity self-adjusting function and a preparation method thereof, and the microporous layer with the humidity self-adjusting function is of a hydrophilic and hydrophobic mixed structure and is arranged between a cathode catalyst layer and a cathode gas diffusion layer. Comprising a carbon material, a hydrophobic polymer and a ceramic oxide modified by a sulfonic acid group, the proton exchange membrane fuel cell adopting the microporous layer has a humidity self-adjusting function during working; the preparation method comprises the following steps: uniformly dispersing a carbon material and a ceramic oxide modified by a sulfonic acid group in ethanol and / or isopropanol to obtain a dispersion liquid, adding a water repellent agent into the dispersion liquid, uniformly mixing to obtain a microporous layer slurry, and finally coating the microporous layer slurry on the gas diffusion layer to obtain the gas diffusion layer. And drying at a constant temperature to obtain the microporous layer with the humidity self-adjusting function. With the adoption of the microporous layer, the comprehensive performance and the long-term stability of the fuel cell can be remarkably improved; the preparation method is simple.

The invention discloses a carbon-coated nickel-based super-hydrophobic catalyst as well as a preparation method and application thereof, and belongs to the technical field of catalysts and high alcohol synthesis. The preparation method comprises the following steps: dissolving nickel salt and citric acid in water, and then heating and stirring the obtained mixed solution to obtain a precursor; roasting the precursor in an inert atmosphere to obtain a carbon-coated nickel-based catalyst; and carrying out ball-milling mixing on the carbon-coated nickel-based catalyst and polytetrafluoroethylene to obtain the carbon-coated nickel-based super-hydrophobic catalyst. According to the invention, the carbon-coated nickel-based catalyst is firstly prepared, then the carbon-coated nickel-based catalyst is coupled with the hydrophobic polymer polytetrafluoroethylene to form a new super-hydrophobic catalyst, and the nickel-based catalyst and the polytetrafluoroethylene are subjected to ball-milling mixing, so that the hydrophobic property of the nickel-based catalyst is improved, the water poisoning phenomenon of the catalyst is relieved, and further coupling of low-carbon alcohol to higher alcohol is promoted; the yield of the high alcohol and the selectivity of the C6 < + > high alcohol are improved, and the method has a wide application prospect.

An implantable device for delivery of a macromolecular drug compound is provided. The device comprises a core having an outer surface and a membrane layer positioned adjacent to the outer surface of the core. The core comprises a core polymer matrix within which is dispersed a drug compound having a molecular weight of about 5 kDa or more, the polymer matrix containing a hydrophobic polymer. The membrane polymer matrix includes from about 70 wt. % to about 99 wt. % of an ethylene vinyl acetate copolymer.

The invention provides an EICP-based sandy soil curing agent, a sandy soil curing method and application thereof, and relates to the technical field of rock and soil reinforcement. The sandy soil curing agent comprises a urease solution, a cementing fluid and a hydrophobic polymer, wherein the urease solution is prepared by salting out a urease crude extract and then carrying out solid-liquid separation; the cementing liquid comprises calcium salt, magnesium salt and urea. The curing agent is convenient to use, the solidified soil body is stable in structure, and the curing agent has excellent disintegration resistance. The invention further provides a sandy soil curing method and application of the sandy soil curing agent or the sandy soil curing method.

The invention discloses a high-performance Mg < 2 + > / Li < + > separation nanofiltration membrane and a preparation method thereof, the Mg < 2 + > / Li < + > separation nanofiltration membrane is a polymer composite membrane, and is composed of a surface separation layer and a support layer; the surface separation layer is formed by self-assembling a polycation electrolyte and a polyanion electrolyte layer by layer, the supporting layer is formed by ultraviolet grafting of any one or two of sodium polystyrene sulfonate, polymethylacrylic acid 3-sulfonic acid propyl ester potassium salt and polyacrylic acid on the surface of a hydrophobic polymeric membrane, and the surface of the supporting layer is negatively charged. The negative charge amount of the supporting layer is gradually reduced from top to bottom; the whole separation membrane has the characteristics that the upper layer is hydrophilic and the lower layer is hydrophobic. By adjusting the charge density and aperture of the supporting layer, the structure of the surface separation layer is influenced, the charge repulsion effect, aperture screening effect and built-in electric field intensity of the whole membrane are enhanced, and the Mg < 2 + > / Li < + > separation factor is increased. Permeation and rapid transportation of water are promoted by virtue of a hydrophilic upper-layer and hydrophobic lower-layer structure, and the membrane flux is improved; the preparation process is simple, and the used solvent is water, so that the method is green and environment-friendly and has a good application prospect.

The invention relates to a wet response fiber and a preparation method and application thereof. The wet response fiber is a double-component parallel type composite fiber. Wherein the first component comprises a wet response factor and a polymer; the second component includes a hydrophobic polymer. The two components in the two-component wet response fiber material are controllable and adjustable, the driving effect is obvious, the spinning process is simple, continuous preparation can be achieved, various textile processes can be easily matched, and customized wet response textured fabric is achieved. The wet response fiber disclosed by the invention is expected to be used in the fields of intelligent wearing, sports health, medical assistance, high-end equipment, environmental perception, information acquisition, artificial muscles, soft robots and the like.

The invention discloses a halide solid electrolyte with a multilayer hierarchical core-shell structure, which sequentially comprises an inner core halide solid electrolyte, a first conductive polymer high-molecular coating layer and a second hydrophobic polymer high-molecular coating layer from inside to outside, the first conductive polymer high-molecular coating layer is formed by copolymerizing conductive polymer monomers with ether oxygen groups-O-or carbonyl C = O, and the second hydrophobic polymer high-molecular coating layer is prepared by ball-milling, sintering and coating a high-molecular hydrophobic material on the surface of the first conductive polymer high-molecular coating layer; and a chemical bonding interface is formed between the first conductive polymer high-molecular coating layer and the inner core halide solid electrolyte through an ether oxygen group-O-or carbonyl C = O in a molecular chain segment. The thickness of the prepared halide solid electrolyte membrane can be reduced to be less than 100 microns, the growth of lithium dendrites is inhibited by the interface self-adaptive characteristic, and the capacity retention rate is gt after 200 cycles; 80%; the sintering temperature is less than or equal to 300 DEG C, the energy consumption is reduced, and lattice distortion is avoided.

To provide a gel preparation kit, a gel preparation material, a medicinal drug, and a medical device that suppress a reaction with a medicine or a cell, and promote inclusion of a hydrophobic medicine into the gel or cell proliferation.SOLUTION: A gel preparation kit comprising a polymer (A) and a polymer (B), where the polymer (A) includes a hydrophilic polymer portion (A1) with 2 to 8 branches, a hydrophobic polymer portion (A2) that is bonded to the side chains or ends of each branch of the hydrophilic polymer portion (A1), and a click-reactive group (A3) that is bonded to at least one side chain or end of the hydrophobic polymer portion (A2), and polymer (B) includes a hydrophilic polymer portion (B1) with 2 to 8 branches, a hydrophobic polymer portion (B2) that is bonded to the side chains or ends of each branch of the hydrophilic polymer portion (B1), and a click-reactive group (B3) that is bonded to at least one side chain or end of the hydrophobic polymer portion (B2). The click-reactive groups (A3) and (B3) can be cross-linked through a click reaction.SELECTED DRAWING: None

This disclosure relates to polyethylene glycol (PEG)-functionalized nanoparticles comprising a functional agent, and preparation methods, properties and applications thereof. The nanoparticle represented by PEG-L-G / P, comprising a type of hydrophilic PEG, a hydrophobic functional agent G, which are covalently linked by L: a linker or a chemical bond, and a type of hydrophobic polymer P. The G and P form the hydrophobic core, while the PEG constitutes the hydrophilic outer layer of the nanoparticle in an aqueous medium. The functional agent comprises one or more functional compounds including a therapeutic drug, an imaging diagnostic agent, a photoelectric responsive diagnostic agent, an immune-stimulating agent, or a combination thereof. The nanoparticles comprising such functional agent can offer various applications in multiple biomedical fields.

The invention relates to the technical field of sewage treatment, and particularly discloses a high-porosity slow-release microelement anti-mineralization sulfur autotrophic denitrification filter material and a preparation method thereof. The sulfur autotrophic denitrification filter material is of a core-shell structure, a complex of sulfur, volcanic rock micro powder and a curing fungicide is used as an inner core, and a hydrophobic polymer coating layer and a porous ceramic bonding layer are sequentially coated on the surface of the inner core; the hydrophobic polymer coating layer is a hydrophobic breathable composite film formed by crosslinking a polydimethylsiloxane prepolymer and calcium alginate. The volcanic rock natural trace elements are utilized to realize waste control by waste, surface mineralization is effectively prevented through the hydrophobic middle layer, the activity of the microbial inoculum is protected in combination with a low-temperature flexible sintering process, and the whole device has the advantages of high porosity, light weight, quick start, long service life, low backwashing energy consumption and the like. Compared with the prior art, the invention has remarkable innovativeness and creativity in the aspects of structural design, material selection and process integration.

This disclosure relates to polyethylene glycol (PEG) -functionalized nanoparticles comprising a functional agent, and preparation methods, properties and applications thereof. The nanoparticle represented by PEG-L-G / P, comprising a type of hydrophilic PEG, a hydrophobic functional agent G, which are covalently linked by L: a linker or a chemical bond, and a type of hydrophobic polymer P. The G and P form the hydrophobic core, while the PEG constitutes the hydrophilic outer layer of the nanoparticle in an aqueous medium. The functional agent comprises one or more functional compounds including a therapeutic drug, an imaging diagnostic agent, a photoelectric responsive diagnostic agent, an immune-stimulating agent, or a combination thereof. The nanoparticles comprising such functional agent can offer various applications in multiple biomedical fields.

The invention discloses a medical pressure-sensitive adhesive patch based on citric acid, a preparation method and application, the medical pressure-sensitive adhesive patch is composed of an adhesion layer and an anti-adhesion layer, and the thickness ratio of the adhesion layer to the anti-adhesion layer is 1: 1-100: 1; the adhesion layer is obtained by polymerizing a citric acid unit and a polyhydroxy compound unit; the hydrophobic high-molecular polymer is selected from at least one of a polylactic acid-glycolic acid copolymer, polylactic acid, polyurethane and polyether urethane. According to the preparation method, three carboxyl groups in the citric acid not only can be used for esterification reaction with polyhydric alcohols to form a network, but also can provide excellent adhesive force for contact between the adhesive patch and the tissue surface through electrostatic interaction or hydrogen-bond interaction. The anti-sticking layer prepared from the hydrophobic high-molecular polymer can effectively resist invasion of external moisture and bacteria, so that the service time of the adhesive patch is prolonged; meanwhile, the anti-sticking layer can also play a supporting role, so that the mechanical strength of the adhesive tape is improved.

The invention relates to the technical field of preparation of hollow fiber nanofiltration membranes, in particular to a hollow fiber nanofiltration membrane structure and a preparation method thereof.A hollow fiber base membrane of the hollow fiber nanofiltration membrane structure is prepared by blending a hydrophobic polymer A and a hydrophilic polymer B, and a functional layer is formed by an amino-containing polymer C through an in-situ cross-linking reaction; according to the structure, the functional layer and the base membrane are firmly combined through chemical crosslinking, the interface bonding force is enhanced, the whole preparation process is relatively simple, complex multi-step reaction and special equipment are not needed, the cost is reduced, and large-scale continuous production is facilitated; the mass percent of each component in the spinning solution is in a specific range, and parameters such as conditions of a first coagulating bath and a second coagulating bath, spinning speed, concentration and soaking time of an amino-containing polymer C aqueous solution, concentration and reaction conditions of a cross-linking agent organic solution, drying temperature and time, a protective solution and the like are controlled; and a high-flux and high-divalent ion rejection rate can be prepared.

The invention belongs to the technical field of batteries, and provides a sodium secondary battery positive electrode material and a preparation method thereof, a positive electrode plate, a sodium secondary battery and an electric device. The sodium secondary battery positive electrode material comprises a sodium-containing positive electrode material and a coating layer located on at least part of the surface of the sodium-containing positive electrode material, and the coating layer comprises a hydrophobic polymer. The sodium secondary battery positive electrode material provided by the invention can improve the conductivity and cycling stability of the battery.

The invention discloses a preparation method of anti-tumor hyaluronic acid-naringenin self-assembled nanoparticles, and belongs to the field of medicines. According to the method, carboxyl on hyaluronic acid and hydroxyl on naringenin are combined to form an ester group, and the hyaluronic acid-naringenin polymer is obtained. Hydrophilic hyaluronic acid is combined with hydrophobic naringenin to form a hydrophilic and hydrophobic polymer, then under the action of ultrasonic waves in an aqueous solution, the hydrophobic end repels water molecules and is mutually gathered, and the hydrophilic end wraps the periphery of the hydrophobic end and is in contact with water, so that the structure that the core is hydrophobic naringenin and the core is hydrophobic naringenin is formed. The outer core is a nanoparticle of hydrophilic hyaluronic acid. The particle size of the nanoparticles is 140-200nm, the nanoparticles are stable and uniform, in-vitro release experiment results show that the nanoparticles can be slowly released, and cell experiments show that the preparation can obviously improve the toxicity of naringenin to tumor cells, which shows that the nanoparticles have good anti-tumor activity.

The invention provides a multicolor fluorescent microsphere, a tracer agent, a preparation method of the tracer agent and a detection method.The preparation method of the multicolor fluorescent microsphere comprises the steps that S1, a dispersion phase is provided, the dispersion phase comprises a hydrophilic polymer, a hydrophobic polymer, a hydrophilic fluorescent material, a hydrophobic fluorescent material and a non-polar solvent, and emission peaks of the fluorescent materials are different; providing a continuous phase, wherein the continuous phase comprises water and a surfactant; s2, respectively adding the dispersed phase and the continuous phase into an SPG film emulsifier, and extruding a film to form seed microspheres; removing the non-polar solvent to form a microsphere body; and S3, mixing the microsphere body solution, a monomer solution and an initiator, and carrying out polymerization reaction to form a shell layer coating the microsphere body, thereby obtaining the multicolor fluorescent microsphere.

A transdermal delivery composition for the delivery to skin and the penetration of the skin includes: (a) a therapeutic effective amount of a cannabinoid mixture, wherein the cannabinoid mixture comprises cannabidiol (CBD) and Δ9-tetrahydrocannabinol (THC) at a weight ratio of about 1:20 to about 20:1; (b) a hydrophilic polymer / hydrophobic polymer adduct in an amount sufficient to hold the cannabinoid composition and provide a sustain release of the cannabinoid mixture after application to skin tissue over a time period of at least 6 hours; (c) a penetrant component in an amount sufficient to assist with a transdermal penetration of the cannabinoid mixture through skin tissue once the composition has been applied to skin tissue; (d) a surfactant component in an amount sufficient to stabilize the polymer adduct and release the cannabinoid mixture from the transdermal delivery composition upon application to skin tissue; and (e) at least about 70 wt. % water. A method of application of a transdermal delivery composition to skin tissue includes applying the transdermal delivery composition to skin tissue and spreading the composition to form a film on the skin tissue. A method for formulating a transdermal delivery composition based on a desired penetration weight ratio of CBD to THC through skin tissue includes selecting a formulation weight ratio of CBD to THC for formulating the composition, wherein the weight ratio is determined by multiplying the desired penetration weight ratio of CBD to THC by a CBD / THC delivery factor, wherein the CBD / THC delivery factor.

The application discloses a kind of colloidal bodies with variable pore size and its preparation method, including nanoparticle modification, amphiphilic nanoparticle preparation and variable pore size colloidal body preparation and other steps, by specific setting to each step, so that the colloidal body prepared finally is stable and the pore size is variable, the hydrophobic polymer chain in the cavity inside colloidal body will produce corresponding collapse and stretch form under water / oil different medium environment, close or expose hole, meet the application requirement in selective medium transmission.

The present application relates to a kind of based on Pickering emulsion method preparation heat-conducting filler-polyimide core-shell microspheres method, the method includes the following steps: aromatic diamine monomer is added with aromatic dianhydride monomer and organic polar solvent into reaction vessel and is reacted;Deposition in water, crush, wash and dry, to obtain polyamide acid salt precursor powder;Then with triethylamine and water stirring reaction, to obtain aqueous phase;Heat-conducting filler and hydrophobic polymer are dispersed in solvent to obtain oil phase;Oil phase and aqueous phase are mixed and emulsified, to obtain water-in-oil Pickering emulsion;Demulsification in precipitator, dry, to obtain heat-conducting filler-polyimide core-shell structure microspheres.The present application also provides the heat-conducting filler-polyimide core-shell microspheres prepared by the method, the method for preparing polyimide-based heat-conducting composite material using the core-shell microspheres and the composite material obtained therefrom.The present application method can efficiently prepare three-dimensional heat-conducting composite material with high thermal conductivity in horizontal and vertical directions.

The present application relates to the technical field of composite biological coating. Specifically, the present application relates to a hydrophobic composite layer on a medical degradable magnesium alloy substrate and a preparation method thereof. In the preparation method, firstly, a porous ceramic oxide layer is formed on the magnesium alloy substrate through micro-arc oxidation treatment, so as to reduce the corrosion rate of the magnesium alloy; then, a strontium-doped hydroxyapatite layer is prepared on the surface of the micro-arc oxidation layer using a chemical deposition method, so as to improve the biocompatibility of the magnesium alloy; finally, the magnesium alloy subjected to the micro-arc oxidation and chemical deposition treatment is immersed and pulled once or more times in a polylactic acid solution containing nano-hydroxyapatite, so as to form a hydrophobic polymer layer. The hydrophobic composite layer prepared by the present application improves the corrosion resistance and biocompatibility of the magnesium alloy at the same time. The present application also relates to a magnesium alloy implant product comprising the hydrophobic composite layer.

Metal-coated polymer-encapsulated power semiconductor modules, methods of making / using such power modules, and vehicles having traction power inverters containing such power modules are provided. A power electronics assembly includes one or more power semiconductor modules enclosed within an assembly housing. Each power module includes a substrate, a semiconductor device mounted on the substrate, a polymer encapsulant in which the substrate and semiconductor device are encapsulated, and electrical leads connected to the semiconductor device and protruding from the polymer encapsulant. A metal or ceramic coating is applied to selected portions of the exposed outer surface of the polymer encapsulant. The metal / ceramic coating can be a single metal layer covering substantially all of the exposed surface area of the outer surface of the polymer encapsulant. An optional hydrophobic polymer layer, a passivation layer, and / or an oxide layer can cover the outer surface of the metal layer. Alternatively, another metal layer or an embedded layered microstructure can cover the metal layer.

The application belongs to the technical field of membrane materials, and particularly relates to a method for preparing a Janus membrane hydrophobic layer from modified hydrophobic polymer nanofibers. The method uses secondary deep exfoliation to obtain single-layer high-fluorinated graphene oxide nanosheets, which are used as hydrophobic polymer additives in the preparation of the hydrophobic layer in the electrospinning process to induce the formation of uniform bead structures, promote the formation of finer nanofibers, more microspheres, and larger pore diameters. The Janus membrane prepared with the hydrophobic layer can significantly improve the permeation flux and / or oil-water separation efficiency in the oil-water separation process, and has excellent cycle stability.

Provided is a novel technique with which a temperature-responsive polymer, a hydrophilic polymer, and a hydrophobic polymer can be produced separately in a simple manner. The polymerizable composition contains the following monomers (A-1) and (B-1). (A-1) is a monomer represented by formula (1-1), and (B-1) is a monomer represented by formula (2-1) (in formula (1-1), R1 represents an alkanediyl group having 1-5 carbon atoms, and n represents an integer of 1-10). ) (In formula (2-1), R2 represents a linear alkanediyl group having 1-5 carbon atoms. ).

The invention relates to a polymer annealing pretreatment perovskite film, a preparation method, application and a battery. The preparation method sequentially comprises the following steps: cleaning ITO glass, and preparing an electron transport layer on the ITO glass after ultraviolet ozone treatment; transferring the substrate into a glove box, and preparing a perovskite wet film through a two-step spin-coating method; spin-coating a polymer solution on the perovskite precursor wet film, wherein the polymer comprises a hydrophobic polymer material; and the perovskite precursor wet film spin-coated with the polymer solution is transferred to an air environment outside a glove box for annealing treatment, so that a perovskite light absorption layer is formed in the annealing process, and meanwhile, the polymer solution forms a polymer water-blocking packaging layer covering the perovskite light absorption layer. The method can effectively reduce the efficiency reduction caused by the humidity problem in the annealing process of the perovskite in the air when the perovskite is prepared by a two-step method.

The invention relates to the technical field of degradable films, and particularly discloses a long-acting antibacterial degradable film material and a preparation method thereof. The long-acting antibacterial degradable film material is prepared from the following raw materials in parts by weight: 40 to 80 parts of matrix resin, 15 to 35 parts of hydrophobic modified chitosan, 5 to 10 parts of antibacterial agent master batch and 5 to 10 parts of reinforcing agent, the hydrophobic modified chitosan is stearaldehyde grafted chitosan at polylactic acid, and the antibacterial agent master batch is siloxane modified dioctadecyl dimethyl ammonium methyl carbonate at polylactic acid. The material can be well compatible with a hydrophobic polymer matrix, migration and loss of antibacterial components can be inhibited, long-acting stable antibacterial performance is achieved, good mechanical performance and barrier performance are kept, meanwhile, environment degradability of the whole life cycle is ensured, and therefore the urgent requirement of modern green packaging for high-performance, multifunctional and sustainable materials is met.

The implantable device includes a core including a core polymer matrix within which is dispersed one or more therapeutic agents. The core polymer matrix includes a hydrophobic polymer comprising a first poly ortho ester (POE) polymer. The POE polymer has a Tg of between about -20°C and 40°C as determined in accordance with ASTM E1640-18. Methods for treating conditions in a patient in need thereof are also provided.

An implantable device for delivery of a macromolecular drug compound is provided. The device comprises a core having an outer surface and a membrane layer positioned adjacent to the outer surface of the core. The core comprises a core polymer matrix within which is dispersed a drug compound having a molecular weight of about 0.5 kDa or more, the polymer matrix containing a hydrophobic polymer. Further, the membrane layer comprises a plurality of water-soluble particles distributed within a membrane polymer matrix containing an ethylene vinyl acetate copolymer, wherein the water-soluble particles have a D50 particle size of about 150 micrometers or less and contain a non-polymeric, hydroxy-functional compound.