Extraction and application of tannin in the medical,food and chemical industries

摘要

Tannins are kinds of polyphenols found in plants,which can be divided into hydrolyzed tannins and condensed tannins according to the structure.They are extracted using solid/liquid,supercritical,pressurized water,and microwave-assisted extraction approaches.Because of the excellent antioxidant and antibacterial properties,tannins are widely used in medicine and food process.Considering the above advantages,the present review focused on various techniques to extract tannins and their application in the medical,food and chemical industries.