Method for entrapment of active materials in chitosan

摘要

Encapsulation of active materials in chitosan beads of uniform size and improved mechanical and chemical stability. The active material is suspended in an acidic aqueous solution of a chitosan having a molecular weight of less than 250,000, the suspension is added dropwise to a crosslinking solution of diphosphate and glyoxal hydrate and the resulting beads are cured. It is possible to coat the active material with oil prior to suspension.