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191results about How to "High film stability" patented technology

Method for preparing graphene oxide film for sustained release of and graphene oxide film product

The invention discloses a method for preparing a graphene oxide film and a graphene oxide film product. The method comprises the following steps: mixing graphene oxide dispersion liquid and amino terminal-hyperbranched or dendritic polymer, carrying out suction filtering to prepare the graphene oxide film. The invention further discloses a method for preparing the graphene oxide film for sustained release of drug and a graphene oxide film product, and the method comprises the steps of mixing the graphene oxide dispersion liquid and the amino terminal-hyperbranched or dendritic polymer, adding a medicine with an aromatic nucleus into the mixed solution, and finally carrying out suction filtering. According to the method, the graphene oxide is crosslinked by means of the amino terminal-hyperbranched or dendritic polymer to form a flat lamellar film, so that the film has a relatively high film stability in an aqueous environment, the sustained-release controlled-release performance of drug can be improved, and the drug loading capacity of the film can be improved; and the graphene oxide film for sustained-release of drug is slowly released in a damp or aqueous environment and has the advantages of long maintaining duration and remarkable antibacterial effect.
Owner:ZHEJIANG UNIV

Aromatic amine compound and organic light-emitting device (OLED) containing compound

The invention relates to an aromatic amine compound and an organic light-emitting device (OLED) containing the compound. The structural formula of the aromatic amine compound is as shown in the following description. The aromatic amine compound involved in the invention has relatively high refractive index, and can improve the light extraction efficiency of a top-emitting organic photoelectronic device when used as the capping layer of an organic light-emitting display device. The aromatic amine compound involved in the invention has relatively small extinction coefficient, and barely absorbs blue light, thereby facilitating the improvement of the luminous efficiency; meanwhile, the aromatic amine compound can effectively block water and oxygen in an external environment, and protects an OLED display panel from being eroded by the water and the oxygen, and the OLED can achieve high efficiency and long life. Compared with a known OLED, the OLED involved in the invention can greatly improve the light extraction efficiency because a material for an organic EL element with high refractive index, and excellent film stability and durabilityis used as a material for the covering layer. The organic light-emitting device involved in the invention can achieve high efficiency and long life.
Owner:JILIN OPTICAL & ELECTRONICS MATERIALS

Method for preparing super-hydrophobic surface with ultra-critical CO2 rapid expansion method

The invention discloses a method for preparing a super-hydrophobic surface with an ultra-critical CO2 rapid expansion method. The method comprises the following steps of: activating nano-silica with hydrochloric acid, filtering, drying, adding absolute ethanol, adding distilled water, adding two kinds of coupling agents containing fluorine and double bonds, washing a product, filtering and dryingto obtain nano-silica particles containing double bonds; adding the nano-silica particles containing double bonds into an ultra-critical CO2 reaction kettle, stirring, and spraying onto a water-basedpolyurethane paint surface which is end-capped with double bonds and is added with an initiator; and drying, grafting the nano-silica particles onto a polyurethane coating surface to form a stable structure to obtain a super-hydrophobic surface. A process used in the method is environmentally-friendly, the ultra-critical CO2 is a nontoxic, non-flammable and environmentally-friendly solvent, the solvent which quickly expands in a fluid and solute particles are easy to separate rapidly and completely, and no solvent is left in the particles; and the preparation efficiency is high, the method issuitable for large-area preparation, and high film coating stability and high scratch resistance are achieved.
Owner:SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
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