116results about How to "Improve superhydrophilicity" patented technology

The invention provides a superhydrophilic coating with the function of catalyzing NO long-period stable release and a preparation method thereof. The preparation method comprises the following steps of performing pretreatment on the substrate material surface; putting the treated substrate material in partial acid buffer liquid; then, adding polyphenol compounds, multi-amine compounds, NO catalysts and oxidants for reaction; soaking a product obtained through reaction in deionized water; performing ultrasonic cleaning; then, performing drying under the nitrogen gas condition; preparing the superhydrophilic coating. The method has the advantages that the operation is simple; the reaction conditions are mild; the prepared coating material contains polyphenol compounds, a large number of functional groups such as carboxyl, phenolic hydroxyl groups, benzoquinonyls and amido groups and metal ions or chemicals capable of catalyzing an NO donor to release NO; the metal ions and the chemicalsmutually act with phenolic hydroxy functional groups or act with a system Pi-Pi accumulation for realizing the long-period existence of NO catalysts; further, the long-period sustained release function of NO is realized; the superhydrophilic coating can be used for preparation of materials for resisting blood coagulation, resisting hyperplasia, promoting endothelium growth, resisting tumor and thelike.