32results about How to "Maintain biocompatibility" patented technology

The invention discloses a modified polyactic acid and a preparation method thereof. The modified polyactic acid provided by the invention consists of a linear poly-L-lactic acid (PLLA) and a poly-dextro-lactic acid (PDLA) with a branched structure, wherein the PDLA with the branched structure is at least one of a stellate branched PDLA, a pectinate branched PDLA, a block copolymer of the stellate branched PDLA and a racemic polyactic acid and a block copolymer of the pectinate branched PDLA and the racemic polyactic acid. The modified polyactic acid is prepared by mixing the linear PLLA and the branched PDLA. In the preparation method, the PDLAs with different branched structures are added into the linear PLLA in a certain ratio; and the PDLA and the PLLA form a stereo composite. The PLLA and the branched PDLA are connected with each other by stereo composite structures, so that a net-like structure taking branched points and the stereo composite as crosslinking points is formed in the modified polyactic acid, and an excellent mechanical property is provided for the modified polyactic acid.

The invention relates to an electroactivity anti-corrosion coating based on gamma- polyglutamic acid and a preparation method thereof. The electroactivity anti-corrosion coating not only has good anti-corrosion performance, but also can keep the original cell compatibility of base materials. The preparation method comprises the following steps of putting electro-active small molecular aniline tetramer through amidation reaction into natural poly-polypeptide gamma-polyglutamic acid, then carrying out self-assembly in selective solvent, and finally preparing the electro-active anti-corrosion coating on the surface of magnesium alloy through electrophoretic deposition technology. The electroactivity anti-corrosion coating can well adjust and control the degradation behaviors of the magnesiumalloy, and also has lower cytotoxicity and good cell compatibility. In addition, the whole preparation process is simple to operate, low in energy consumption, and wide in application range, and easily realizes industrialization.

The invention is named as a cathode mixture for use in a biocompatible battery. Methods and apparatus to form biocompatible energization elements (e.g. electroactive contact lenses) are described. In some examples, the methods and apparatus to form the biocompatible energization elements involve forming cavities comprising active cathode chemistry. The active elements of the cathode and anode are sealed with a biocompatible material. In some examples, use fields of the method and the apparatus can comprise any biocompatible devie or product of the energization elements.

The invention discloses a preparation method of a sensor electrode surface anti-biological-pollution coating. The method is characterized by comprising two major steps of synthesizing photosensitive hyaluronic acid and preparing an anti-biological-pollution coating. The prepared photosensitive hyaluronic acid has high hydrophilcity, optical crosslinking performance and good biocompatibility. The synthesis of the photosensitive hyaluronic acid is simple; the raw materials can be easily obtained; the industrial production can be easily realized; through the introduction of photosensitive monomers, on the basis that the coating achieves the self excellent characteristics of the hyaluronic acid, the coating structure can be fixed through ultraviolet light crosslinking. When the photosensitivehyaluronic acid is applied to raw liquid sample detection, a sensor electrode based on modification by the photosensitive hyaluronic acid coating has long-term and efficient anti-biological-pollutioncapability. The light crosslinking technology, the functional coating technology and the biosensing technology are combined; the preparation method can be widely applied to the fields of food safety,biological medicine, environment protection monitoring, life safety and the like.

The invention belongs to the field of medical dressings, and particularly relates to a long-effective bacteriostatic gel dressing used for operative wounds and a production method thereof. The gel dressing comprises raw material components of bacterial cellulose, alginate, a phenytoin medicine, nano-silver particles, polyvinyl alcohol, hydroxypropyl cellulose, glycerin, sorbitol, deionized water and the like. By using the antibacterial active components of the phenytoin medicine, the nano-silver particles and the like in combination with the active components, for promoting wound healing, of the bacterial cellulose, the alginate and the like, the long-effective bacteriostatic gel dressing used for the operative wounds has a synergistic effect in the aspects of antisepsis, anti-inflammation, promotion of healing of the operative wounds and the like, and has the characters of being good in air permeability, high in water-retention rate, high in tenacity and the like, and through high energy ray irradiation sterilization, a gel product is clean and safe, and does not cause wound infection.

The invention discloses a plant protection agent, which is prepared by coordination and complexation of Xanthomonas exopolysaccharide and copper inorganic salt, or by coordination and complexation of Xanthomonas exopolysaccharide and zinc inorganic salt. Or the Xanthomonas exopolysaccharide is coordinated and complexed with copper inorganic salt and zinc inorganic salt; specifically, the composition is composed of the following weight percentages: Xanthomonas exopolysaccharide 0.5-1.0%, copper sulfate 0.5% ~1.0%, zinc sulfate 0.5~1.0%, polyethylene glycol-4000 1%, polyvinyl alcohol 2%, polyvinylpyrrolidone 1%, distilled water 93.0~95.0%. The present invention overcomes the problem of poor mixing properties of inorganic copper preparations, so it is sprayed on the surface of crops to form a dense protective drug film, which can slowly release copper and zinc ions as plant nutrition, thereby ensuring that the "copper content" in the preparation is low, and overcomes the problem of The problem of copper damage caused by improper use of inorganic copper preparations or the aggravation of mite infestation has been solved.