5results about How to "High oxygen permeability" patented technology

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 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.

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 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.