23 Jul Preparation and application of pH glucose dual sensitive hydrogel
Abstract
The invention discloses preparation and application of a pH glucose dual sensitive hydrogel. The hydrogel is formed by crosslinking of phenylboronic acid modified chitosan and an active functional group equipped crosslinking agent through imine bond and phenylboronic acid ester two dynamic covalent bonds, and has injectability and self-repairing performance. The imine bond is stable under normal physiological pH value, can hydrolyze under slightly acidic pH value, and is sensitive to the pH value change. Phenylboronic acid ester can undergo competing reaction in the presence of glucose, so that hydrogel can have network structure change so as to have glucose responsiveness. By regulating the structure, composition and functional groups of phenylboronic acid modified chitosan and the crosslinking agent, the rheological properties of the hydrogel can be adjusted, and activity release of the hydrogel to a substrate can be controlled. The system can be used as a drug carrier to convey various antitumor and diabetes drugs, also can be applied as a tissue engineering scaffold material to cell encapsulation and culture, thus realizing synergic treatment on the drug and cell level.
Year: 2015
Country: CN
Doc No: 104758939