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Preparation and Physico‐Chemical Characteristics of N‐Maleoyl Chitosan Films
Author(s) -
Vanichvattanadecha Chutima,
Supaphol Pitt,
Rujiravanit Ratana
Publication year - 2008
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.200850419
Subject(s) - swelling , chitosan , maleic anhydride , solvent , materials science , polymer chemistry , nuclear chemistry , casting , ionic strength , chemical engineering , chemistry , composite material , organic chemistry , aqueous solution , polymer , copolymer , engineering
N ‐Maleoyl chitosan ( N ‐MC), a water‐soluble derivative of chitosan, was synthesized by N ‐carboxyacylation of chitosan and maleic anhydride. N ‐MC films were prepared by solvent casting and kept in a desiccator for different time intervals in order to obtain N ‐MC films with different degrees of cross‐linking. The swelling characteristic of N ‐MC films was investigated. When the ageing time increased from 5 to 30 d, the swelling of the N ‐MC films decreased from ∼475 to ∼160% and the weight loss decreased from ∼25 to ∼8%, corresponding to the increase in the cross‐linking density from 0.86 × 10 −6 to 8.97 × 10 −6 mol · cm −3 . Additionally, the swelling behavior of the N ‐MC films was influenced by changes in either the pH or the ionic strength of the media.