25results about How to "High oxygen permeability" patented technology

The invention belongs to the technical field of hydrogel materials, and discloses a carboxylated chitosan modified silicone hydrogel contact lens material and a preparation method thereof. The preparation method comprises the following steps: mixing a siloxane monomer, a zwitterionic monomer, a first cross-linking agent, an initiator and a first organic solvent, and carrying out polymerization reaction to obtain silicone hydrogel; and mixing the silicone hydrogel, carboxylated chitosan, a second cross-linking agent and a second organic solvent, and carrying out a cross-linking reaction to obtain the carboxylated chitosan modified silicone hydrogel contact lens material. The zwitterionic monomer is introduced into the siloxane monomer polymerization process, and the carboxylated chitosan is adopted to modify the silicone hydrogel, so that the protein adsorption resistance and antibacterial property of the contact lens material are effectively improved. Meanwhile, the raw materials are wide in source, the preparation method is simple and easy to operate, and large-scale industrial production can be achieved easily.

The invention provides silicone hydrogel for contact lenses and a preparation method of the silicone hydrogel, and belongs to the technical field of silicone hydrogel. The silicon hydrogel for the contact lenses, prepared by the invention, is prepared from the following raw materials in parts by weight: 10 to 30 parts of silicon-based monomers, 20 to 40 parts of amino modified polydimethylsiloxane, 15 to 50 parts of hydroxyethyl methylacrylate, 10 to 50 parts of N, N-dimethylacrylamide, 0.1 to 5 parts of a cross-linking agent, 0.1 to 5 parts of an initiator and 20 to 30 parts of a solvent. The silicone hydrogel provided by the invention has high oxygen permeability, durability and comfort, and can effectively reduce adhesion of lipid and microorganisms, so that the problem of eye inflammation is solved, and the long-term stability and wearing comfort of contact lenses are improved.

The invention relates to a method for reducing the content of residual monomers in a polymer composition, the polymer composition, a composition capable of free radical polymerization, a polymer preparation method, a polymer and application.

The invention discloses a high-mechanical-property orthokeratology lens material copolymer and a preparation method thereof, and relates to the technical field of high polymer materials. The used raw materials comprise a fluorosilicone material, a hydrophilic monomer, an initiator and a cross-linking agent; the method comprises the following steps: mixing a monomer and an initiator according to a preset ratio, degassing, and carrying out two-stage heating polymerization reaction in a mold. After the polymerization reaction is finished, the copolymer in the mold is taken out, and the required orthokeratology lens material copolymer with the high mechanical property can be obtained through cleaning and drying treatment. The process is simple in reaction step and short in reaction time, the reaction rate can be controlled, and the production cost of the orthokeratology lens is reduced. The copolymer has high oxygen permeability and excellent optical performance, and meanwhile, compared with common like products, the copolymer shows good mechanical performance. The composition is especially suitable for preparing myopia lenses, orthokeratology lenses (OK lenses) or rigid breathable contact lenses (RGP lenses), can provide excellent visual effects and wearing comfort, and reduces irritation to eyes.

The invention provides a contact lens with a surface hydrophilic coating and a preparation method thereof, and relates to the technical field of contact lenses. The preparation method comprises the following steps: mixing an acrylate monomer, a fluorine-containing siloxane compound, an initiator I, a cross-linking agent, glycerol and water to obtain a pre-polymerized solution I; mixing an unsaturated ester compound, N-vinyl pyrrolidone, polyvinyl alcohol, phosphatidylcholine, an initiator II, alcohol and dimethyl sulfoxide to obtain a pre-polymerized solution II; coating the pre-polymerization liquid II on the surface of a contact lens mold for heating and curing; and injecting the pre-polymerized liquid I into a mold for curing to obtain the contact lens with the surface hydrophilic coating. Phosphatidylcholine is adopted as a raw material to prepare the hydrophilic coating of the silicone hydrogel contact lens, the contact lens is of a three-layer structure, the outer layer is the hydrophilic gel coating and is soft and comfortable, the inner layer is a silicone hydrogel system and is high in oxygen permeability, the contact lens is more comfortable in the wearing process, and foreign body sensation can be effectively avoided.

The invention belongs to the technical field of contact lenses. The invention relates to an anti-blue-light corneal contact lens for controlling myopia, which is prepared from the following components in parts by weight: 10-40 parts of organic silicon resin, 10-30 parts of silicon monomer, 30-80 parts of water-soluble monomer, 1.0-1.5 parts of anti-blue-light monomer, 0.5-3.0 parts of antibacterial monomer and 0.5-2.0 parts of photoinitiator, wherein the total weight part of the organic silicon resin, the silicon monomer and the water-soluble monomer is 100 parts. The anti-blue-light corneal contact lens for controlling myopia is obtained through formula optimization design and UV curing of self-made anti-blue-light monomers and antibacterial monomers. According to the anti-blue-light corneal contact lens for controlling myopia, the problem that an existing anti-blue-light corneal contact lens is serious in yellowing or poor in antibacterial property, and consequently inflammation hazards are caused is effectively solved.

The invention discloses preparation and application of a glutenin-based multi-component composite aggregate, and belongs to the field of food packaging. According to the invention, glutenin and epsilon-polylysine form a composite agglomerate for packaging tannic acid to form a multi-component composite agglomerate, and the composite agglomerate has the properties of efficient sterilization, oxidation resistance and good stability; the multi-component composite coacervate is used as an edible coating, compared with glutenin, the multi-component composite coacervate has better water vapor and oxygen barrier capacity, the antibacterial activity and antioxidant activity of a glutenin coating can be incubated, and the food preservation period is prolonged. In a word, the invention designs a novel multifunctional substance packaging strategy, and further broadens the application of glutenin.

The invention discloses a preparation method of perfluorinated sulfonic acid resin for hydrogen-oxygen fuel cells, and relates to the technical field of fuel cells. The resin product is prepared by emulsion polymerization. Compared with bulk polymerization, solution polymerization and suspension polymerization, emulsion polymerization is suitable for producing high-molecular-weight polymers, water serves as a medium, the reaction safety performance is high, the reaction speed is high, and the method is suitable for industrial production. The proton exchange membrane prepared by the method has excellent ion exchange property and oxygen permeability, and is suitable for preparation of the proton exchange membrane in a fuel cell.

The present invention solves the following problems: providing a porous carbon structure having a high micropore volume and being self-sustaining; a method for manufacturing the same; a positive electrode material using the porous carbon structure; and a battery (particularly an air battery) using the porous carbon structure. The present invention is a porous carbon structure, which is used for the positive electrode of an air battery and has voids and a skeleton formed by incorporating carbon, and which satisfies all of the following conditions (a) to (d). (a) The external specific surface area of ​​the t-curve is 300 m 2 / g to 1,600m 2 / g; (b) the total volume of micropores with diameters ranging from 1 nm to 200 nm is within 1.2 cm 3 / g to 7.0cm 3 / g; (c) the total volume of micropores with diameters ranging from 1 nm to 1000 nm is within 2.3 cm 3 / g to 10.0cm 3 / g range; and (d) the total porosity is in the range of 80% to 99%.

The invention relates to the technical field of overwintering storage of peony seeds in alpine regions, and discloses an overwintering storage method and storage device for peony seeds in alpine regions, the storage device comprises a passive heating mechanism, and the passive heating mechanism is fixedly mounted in a supporting cylinder. The overwintering storage method for the peony seeds in the alpine region comprises the steps that firstly, sand is stirred, a sand layer is laid, and the peony seeds are placed; secondly, the storage barrels and the storage plates are placed in a combined mode; thirdly, passive geothermal heating is conducted on the heat preservation barrel; 4, oxygen is introduced into the heat preservation cylinder at regular time, humidity is automatically controlled, and temperature is monitored in real time; and step 5, determining the low-temperature sand storage time of the peony seeds. The method has the beneficial effects that a temperature guarantee is provided for low-temperature sand storage stratification treatment in the alpine regions of the peony seeds, and through automatic control over ventilation, oxygen supply and humidity of the storage device, the appropriate humidity of the sand layer is kept, and the problem that the peony seeds are mildewed due to oxygen deficit in the overwintering storage process is solved.

The invention discloses a preparation method of a pair of hidden glasses and the pair of hidden glasses. The preparation method of the recessive glasses comprises the following steps: directly mixing and stirring an organic silicon monomer, an amide monomer, a cross-linking agent, a photoinitiator and a thermal initiator, dropwise adding the mixed raw materials into a lens mold, carrying out a thermocuring reaction, and then carrying out a photocuring reaction to prepare the recessive glasses. According to the preparation method, only one-step mixing is needed, the operation is simple, the advantages of photo-thermal curing are integrated, and the production efficiency is improved; the lens prepared by the method has high oxygen permeability and surface wettability.

The invention relates to a PVA-based oxygen-permeable and moisture-permeable strain sensor and a preparation method thereof, and the preparation method comprises the following steps: S1, preparing a modified PVA raw material: uniformly mixing PVA powder, modified bamboo powder, graphene oxide and a silane coupling agent, and then carrying out blending extrusion to obtain a granular raw material; s2, PVA dispersion liquid preparation: mixing and grinding bamboo charcoal powder and a dispersing agent in water, filtering, adding a modified PVA raw material into filtrate, and dissolving to obtain the PVA dispersion liquid; s3, preparing a gel thin-film resistor disc: putting the dispersion liquid into a mold, repeatedly freezing and thawing to obtain thin-layer gel, applying pressure by using a pressing block in a closed cavity, and controlling the humidity to obtain the gel thin-film resistor disc; and S4, in-situ conductivity enhancement: immersing the gel thin-film resistor disc into an ethanol solution of thiophene derivatives and iodine, taking out the gel thin-film resistor disc after the gel thin-film resistor disc is immersed, drying, and carrying out in-situ solid-state polymerization, so as to obtain the gel thin-film resistor disc. And S5, electrode fixation: fixing conductive electrodes at two ends. The strain sensor has the advantages that the obtained strain sensor has relatively high oxygen and moisture permeability and also has proper strength and relatively high conductivity.

The invention discloses a drug-loaded contact lens and a preparation method thereof, and the preparation method comprises the following steps: dissolving a drug in a mixed solution of a surfactant, a cosurfactant and deionized water to prepare a drug microemulsion; the preparation method comprises the following steps: uniformly mixing a silicon monomer, a hydrophilic monomer, a cross-linking agent and an initiator by ultrasonic waves, and carrying out compression molding, photopolymerization or thermal polymerization and demolding to obtain the contact lens, and soaking the contact lens in the drug microemulsion to obtain the drug-loaded contact lens. The maximum drug loading capacity of the contact lens is 215.17 to 217.47 [mu] g / lens. The drug microemulsion prepared by the method is uniform in particle size and stable in morphology. The contact lens can efficiently load the medicine, the bioavailability of the medicine is improved, the basic performance of the medicine-loaded contact lens is stable, and the wearing comfort is improved; the prepared drug microemulsion not only has uniform particle size and stable morphology, but also can effectively reduce the surface contact angle of contact lenses.

The invention discloses a preparation method of an activated pectin-agar composite film loaded with ginger essential oil nanoemulsion and Pickering emulsion. The preparation method comprises the following steps: (1) preparing the ginger essential oil loaded nanoemulsion; (2) preparing a Pickering emulsion loaded with ginger essential oil; and (3) adding the two emulsions into the pectin-agar mixed solution, stirring to form a film-forming solution, casting the film-forming solution into a plastic culture dish, and drying to obtain the pectin-agar composite film. According to the pectin-agar composite film disclosed by the invention, by adding the ginger essential oil, the barrier property of ultraviolet light / visible light is remarkably improved, so that the pectin-agar composite film can be used for packaging easily-oxidized food, has a filtering effect on ultraviolet light, and is beneficial to reducing oxidative deterioration of the food due to ultraviolet irradiation when the film is used for preserving the food; meanwhile, the pectin-agar composite film has excellent antioxidant activity, and in addition, the pectin-agar composite film has a relatively good antibacterial effect on staphylococcus aureus and is suitable for packaging meat, eggs, fishes and other products.

The invention belongs to the technical field of contact lenses, and particularly discloses a silicone hydrogel contact lens capable of being mechanically demoulded. The silicone hydrogel contact lens capable of being mechanically demoulded is prepared by heating and reacting 5-20 parts of dimethylaminoethyl methacrylate, 20-60 parts of hydrophilic monomer, 1.5-3 parts of polyethylene glycol monomethyl ether, 10-20 parts of siloxane monomer, 0.5-2 parts of cross-linking agent and 0.5-2 parts of polymerization initiator, and then performing mechanical demoulding. The proportion of the added siloxane monomer is moderate, so that the oxygen permeability of the lens is ensured, and the wearing comfort of the lens is not influenced; the polyethylene glycol monomethyl ether is added to form crosslinking with other components, so that the toughness of the silicone hydrogel contact lens is remarkably improved, the damage of mechanical demolding to the lens is reduced, and the success rate of mechanical demolding is increased.

This invention belongs to the field of contact lens technology, and provides a moisturizing protein-based contact lens and its preparation method. The preparation method includes the following steps: mixing a silk fibroin solution and a hyaluronic acid-binding protein solution to obtain a protein mixture solution; mixing a hydrophilic modification component, an oxygen-permeable modification component, and water to obtain a composite modifier; mixing the protein mixture solution, the composite modifier, and a crosslinking agent to obtain a pre-crosslinked mixture; molding the pre-crosslinked mixture and performing gradient crosslinking, followed by sequential soaking in buffer solution, rinsing, and sterilization to obtain the moisturizing protein-based contact lens. The contact lens of this invention uses protein as the main component, does not rely on silicon-based substances or harmful crosslinking agents, and possesses high biocompatibility, high oxygen permeability, suitable mechanical properties, and controllable degradation.

The invention provides a silicone hydrogel lens as well as a preparation method and application thereof, and belongs to the technical field of contact lenses. According to the invention, an organic silicon monomer is taken as a main body, a composite formula system of a high-oxygen-permeability silicon-based skeleton and a hydrophilic functional monomer is adopted, and a physical mixing process is adopted to realize dual-advantage fusion and accurate proportion of each core component, so that a product system with both oxygen permeability and comfort is obtained, and safe, comfortable and healthy vision correction choices are provided for consumers.

The invention discloses a polyaniline modified microporous aeration membrane and a preparation method thereof, the polyaniline modified microporous aeration membrane comprises a first layer of base membrane, a second layer of microporous membrane and a third layer of modification layer, and aims to solve the problems of membrane pore blockage, hydrophobicity reduction and the like caused by microbial pollution in use of a hydrophobic microporous membrane. According to the technical scheme, the aeration membrane is characterized in that membrane holes of a microporous membrane are modified with polyaniline, so that the microporous membrane is free of holes and capable of permeating oxygen, the microporous membrane is a high-molecular organic membrane such as a polytetrafluoroethylene membrane and a nylon membrane, micropores of 0.1-2 microns are distributed in the surface of the microporous membrane, and the prepared aeration membrane has good air permeability and biological adhesiveness.

The invention provides a nano-film silicon-based hydrogel drug-loaded contact lens and a preparation method thereof.The nano-film silicon-based hydrogel drug-loaded contact lens comprises a contact lens body and a film which is arranged on the surface of the contact lens body and contains drug molecules, the thickness of the film is 0.5-10 microns, the nano-structure monomer aperture of the film is 50-1000 nm, and the contact lens body has the oxygen permeation coefficient of 100-150; the contact lens is prepared from 0-90% of a contact lens base material, 0.1-5% of a nano-carrier, 0-20% of a cross-linking agent and 0-8% of an initiator. Wherein the nano-carrier is prepared from mesoporous silica and chitosan, the mesoporous silica has nano-pores with different pore diameters, and the nano-pores are loaded with hydrophilic or hydrophobic drug molecules. Drug molecules with different molecular weights are loaded by nano-carriers with different apertures, so that the silicone hydrogel contact lens has the functions of loading a large amount of drugs and slowly releasing the drugs, the retention time of the drugs in eyes is prolonged, the silicone hydrogel contact lens has high oxygen permeability, the drug retention rate can be obviously improved, adverse reactions are reduced, and continuous eye treatment can be carried out.

The invention provides a silicone hydrogel contact lens and a preparation method thereof, and belongs to the technical field of contact lenses. The siloxane monomer is utilized to improve the high light transmittance and oxygen permeability of the contact lens, and the hydrophilic monomer endows the hydrogel with hydrophilicity and softness, so that the comfort level of the contact lens is improved; the polyethylene glycol diacrylate is used for reducing the crosslinking density and improving the surface wettability, so that the mechanical property and the surface wettability of the organic silicon hydrogel are favorably improved; the monomethyl itaconate enables the silicone hydrogel contact lens to have good hydrophilicity and high lubrication degree. By means of the monomers, the hydrophilicity and air permeability of the organic silicon hydrogel are improved, the contact lenses have high light transmittance, oxygen permeability and comfortable wearing feeling (hydrophilicity and high lubrication degree), and the high requirements of modern contact lenses for material performance are met.

The present application relates to a kind of PHEMA hydrogel and its preparation method, belong to hydrogel technical field, including the following mass parts raw materials: 2-hydroxyethyl methacrylate, reinforcing agent, solvent, crosslinking agent, initiator and slow-release agent;Preparation method includes the following steps: crosslinking agent is dispersed in 2-hydroxyethyl methacrylate, then reinforcing agent and slow-release agent are dispersed in solvent, and ultrasonic treatment is carried out, subsequently initiator is added dropwise to system, and make the reaction reflux 3 hours at 80 DEG C, after reaction, wash with deionized water, and dry, obtain PHEMA hydrogel.The technical scheme in the present application, by incorporating [2-(methacryloyloxy) ethyl] dimethyl-(3-sulfopropyl) ammonium hydroxide, can enhance biocompatibility and antifouling performance, also can adjust the water content and pore of hydrogel, play the role of balancing optical transparency and oxygen permeability.

The invention relates to a method for preparing a silicon-containing prepolymer, the silicon-containing prepolymer and a silicon hydrogel film. The preparation method of the silicon-containing prepolymer comprises the following steps: mixing water, a cosolvent and a silicon-containing hydrophobic monomer according to a molar ratio to form a mixture; hydrochloric acid is added into the mixture, substitution and hydrolysis reactions are carried out to obtain substitution and hydrolysis products, the molar concentration of the hydrochloric acid is 0.001-0.005 times of the molar concentration of the silicon-containing hydrophobic monomer, and the pH of the mixture is smaller than or equal to 1; and adding a hydroxyl-containing hydrophilic compound into the substitution and hydrolysis product, and carrying out condensation reaction to obtain the silicon-containing prepolymer. In addition, the invention also relates to the silicon-containing prepolymer and the silicon hydrogel film prepared by the method.

The invention provides a colored soft hydrophilic corneal contact lens and a manufacturing method thereof, and belongs to the technical field of corneal contact lenses. The pigment layer is printed and dyed on the surface of the inner film layer material in a film printing and dyeing manner, so that the inner film layer can well prevent the pigment layer from being in direct contact with eyes. The inner film layer, the pigment layer and the lens layer are subjected to process treatment means of mould pressing, curing and turning, and finally the colored soft hydrophilic corneal contact lens is obtained. The stability of the contact lens is effectively improved by improving a film-covering printing and dyeing process and a multi-temperature-section heat treatment mode, so that the contact lens is not easy to dehydrate and can be kept wet for a long time. The long-chain polymer and the polymeric monomer are matched with each other, so that the inner film coating layer is softer and better fits eyes, and the use comfort of a user is improved.

The present invention relates to a preparation method for a multilayer ceramic membrane having an oxide thin layer and application. A composite material made up of a fluorite-type oxide and a perovskite-type or spinel-type oxide is pre-formed, and then high-temperature thermal treatment under contact with Al2O3 is carried out to obtain a multilayer ceramic membrane having a fluorite-type oxide thin layer. The density of the fluorite-type oxide thin layer is adjustable, the thickness is controllable and can be as thin as about 1 micron, there is good compatibility between each layer of the multilayer ceramic, and same does not peel or de-layer. In addition, a multilayer ceramic preparation process provided in the present invention is simple, has good repeatability, and is readily scaled up. When the multilayer ceramic is used as a hybrid conductive membrane, said ceramic continuously and stably works for over 1000 hours in an atmosphere containing H2, CO2, CH4, and H2S, and serves as an oxygen permeable membrane to stably and efficiently carry out industrial byproduct hydrogen-driven water decomposition and hydrogen production. In addition, a multilayer ceramic preparation technique provided in the invention is expected to be applied in fields such as solid oxide fuel cells, high-temperature electrolytic batteries, and gas sensors.