208 results about "Hydrophobic polymer" patented technology

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 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.

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.

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.

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.

The application discloses a one-way wet guiding Janus fiber membrane and a preparation method thereof. The one-way wet guiding Janus fiber membrane is a double-layer composite two-side heterogeneous membrane material, comprising a laminated hydrophilic cotton fiber membrane and a hydrophobic polymer nanofiber membrane. The one-way wet guiding Janus fiber membrane is formed by treating the laminated hydrophilic cotton fiber membrane and the hydrophobic polymer nanofiber membrane with an ionic liquid and then performing hot press welding. The preparation method comprises the following steps: preparing a polylactic acid spinning solution; using the cotton fiber membrane as a receiving substrate, and performing electrostatic spinning on the polylactic acid spinning solution to prepare a two-side heterogeneous double-layer membrane; coating the ionic liquid on the surface of the two-side heterogeneous double-layer membrane, and then performing hot press welding to obtain the one-way wet guiding Janus fiber membrane. The one-way wet guiding Janus fiber membrane has the liquid one-way transport performance and good moisture absorption and air permeation effects. The preparation process is simple, controllable and has a good application prospect.

The preparation method mainly comprises the following steps: spinning a polyurethane hot melt adhesive film and a nano-film on a pretreated base cloth by using an electrostatic spinning technology, and then carrying out hot pressing treatment to obtain the waterproof and breathable fabric. The pretreated base cloth is prepared by soaking a PET polyester fabric in a hydrophobic finishing agent prepared by cationic emulsion polymerization and then carrying out high-temperature baking treatment. The molecular chain of the hydrophobic treatment agent contains long-chain alkane and fluorocarbon bonds, so that the hydrophobic capacity of molecules can be enhanced, and the waterproof capacity of the pretreated base cloth is further improved. The nano film can be prepared through electrostatic spinning of the spinning precursor solution, the weight part ratio of a hydrophobic polymer to thermoplastic polyurethane to modified silicon dioxide in the spinning precursor solution is (60-80): (8-10): (20-30), and the nano film has nanoscale pores, can prevent permeation of water or easily polluted liquid, allows water vapor and air to pass through and has waterproof and breathable performance.

The invention belongs to the technical field of preparation of nano composite materials, and particularly relates to a melt-blending nano-dispersed cellulose nanocrystal modified polylactic acid composite film material and a preparation method of the melt-blending nano-dispersed cellulose nanocrystal modified polylactic acid composite film material. Comprising polylactic acid and hexadecane modified cellulose nanocrystals, and the addition amount of the hexadecane modified cellulose nanocrystals is 1%-5% of the mass of the polylactic acid. The preparation method comprises the following steps: activating cellulose nanocrystals by adopting sodium hydroxide, and then adding halogenated hexadecane for reaction to obtain the hexadecane modified cellulose nanocrystals. Through surface hydrophobization green modification, agglomeration caused by drying is avoided, the interfacial compatibility with PLA and other hydrophobic polymers is enhanced, and nano dispersion of cellulose nanocrystal powder in a polylactic acid matrix is achieved through shear force in melt processing and melt fluidity of cetane macromolecules. Therefore, crystallization and heat resistance of polylactic acid are improved.

The invention relates to the technical field of electrolysis electrodes, in particular to a gas diffusion layer and a preparation method and application thereof. The gas diffusion layer comprises a latticed current collector and a porous gas-permeable layer embedded in the latticed current collector, and the porous gas-permeable layer is composed of a hydrophobic polymer. According to the gas diffusion layer, a latticed current collector is adopted as a conductive framework, a three-dimensional continuous electron transmission channel is formed, the electron conduction efficiency is improved, and meanwhile energy consumption and heating caused by ohmic impedance are reduced; meanwhile, the hydrophobic polymer porous layer is embedded into grid pores of the current collector, a reinforcing steel bar-concrete type composite structure with a porous structure is constructed, and the porous structure can serve as a gas channel and is beneficial to gas diffusion; moreover, based on the hydrophobic effect of the hydrophobic polymer, the liquid gathered in the catalyst layer can be quickly led out, and the problem of water flooding of the gas diffusion electrode can be effectively avoided under the condition that the reaction system has more liquid.

The present invention relates to a two- or three-layer film composition for periodontal use, comprising a hydrophobic polymer outer layer and one or two inner layers in the form of electrospun micro / nanofibers based on marine sulfated polysaccharides and calcium.

The present application relates to a kind of chemical makeup-removing soft wipes and preparation method thereof, belong to the technical field of cosmetic products.The present application is with negative charge polyelectrolyte gel solution modification nano metal oxide, with positive charge polyelectrolyte gel solution modification mesoporous nano silicon oxide, two kinds of modified nanometer materials are mixed with core layer hydrophilic polymer and shell layer hydrophobic polymer respectively in spinning process, by coaxial spinning, three-stage traction stretching and cutting, functional short fiber is prepared, again by non-woven fabric processing technology and ultrasonic activation treatment is made into chemical makeup-removing soft wipes;When the soft wipes meet water, the built-in potential and nano channel between fiber core and shell, which are constructed by the two kinds of modified nanometer materials, can break the water molecule aggregation state and convert it into small molecule water, and small molecule water can quickly penetrate cosmetic oil film, so as to realize the "self-dissolution" makeup-removing effect without chemical solvent dependence.

The object of the present invention is to provide an antistatic agent that imparts excellent antistatic properties to thermoplastic resins. [Solution] An antistatic agent (Z) comprising a block polymer (A) having a block of hydrophobic polymer (a) and a block of hydrophilic polymer (b) as constituent units, wherein the hydrophobic polymer (a) consists of polyolefin (a2) and polyamide (a1), and the polyamide (a1) consists of at least two constituent monomers selected from the group consisting of lactam (a101) having 4 to 20 carbon atoms and aminocarboxylic acid (a102) having 2 to 12 carbon atoms.

This disclosure relates to systems and methods for creating and using separators, containing boron species, that are used in electrolyzers. A disclosed separator for an electrolyzer cell includes a porous substrate having pores which provide a fluid path through the porous substrate from a first side of the porous substrate to an opposite side of the porous substrate, which is formed of one or more hydrophobic polymers or copolymers, and a coating that coats the pores of the porous substrate while maintaining the fluid path, where the coating is formed of an alcohol-containing polymer reacted with a boron-containing species.

A method of forming a synthetic brochosome is provided, the method comprising combining (i) a polymer solution comprising a solvent and an amphiphilic polymer having a hydrophobic polymer component and a hydrophilic polymer component, with (ii) an external fluid immiscible with the solvent, thereby forming droplets of the polymer solution in the external fluid; removing the external fluid and the solvent from the droplets, thereby providing a synthetic brochosome. Also provided is a synthetic brochosome and a composition comprising the synthetic brochosome.

The invention discloses a multilayer nanofiber oral paste loaded with an allergen-immunologic adjuvant composition as well as a preparation method and application of the multilayer nanofiber oral paste. The multilayer nanofiber oral paste has an adhesion function. The multilayer nanofiber oral paste is prepared by adopting a continuous electrostatic spinning technology, the adhesion layer is prepared from a polymer material, and the backing layer is prepared from a hydrophobic polymer material. The invention relates to an allergen-immunologic adjuvant composition, and the allergen-immunologic adjuvant composition or a composition nanoparticle is loaded by an adhesive layer. The multi-layer nanofiber oral paste is applied to an oral mucosa area of a patient within a treatment course, so that long-acting release of allergens is realized. After the multi-layer nanofiber oral paste is repeatedly used by a patient, the prevention or treatment of allergic diseases (allergic diseases) can be realized.

The invention discloses a dendritic functionalized magnetic bead with an adjustable particle size and a controllable preparation method of the dendritic functionalized magnetic bead. The magnetic bead comprises a hydrophobic polymer core, magnetic nanoparticles dispersed in a middle layer and a hydrophilic surface with a dendritic structure. A surface dendritic structure with abundant functional groups can be constructed through electrostatic interaction among hydrophilic layer reaction monomers, the specific surface area is large, and the surface group density is improved. An emulsion interfacial polymerization method is adopted for synthesis, and size regulation and control are achieved by controlling reaction conditions such as the size of a hydrophobic polymer and the concentration of a monomer. The synthesized functional magnetic beads are uniform in particle size distribution, the size is controlled in a range of 0.1-105 microns, and the functional magnetic beads have good magnetic properties. The preparation method is simple, large-scale production is easy, a series of functional magnetic beads with different sizes can be obtained by regulating and controlling the preparation method, and different requirements are met. The method is expected to show wide application potential in the biological separation fields of drug delivery, nucleic acid extraction, protein purification, cell sorting and the like.