title: Chitosan-graft-polyaniline-based hydrogels: elaboration and properties.
abstract: Intrinsically conducting polymers are of great interest for a large number of applications. But among the major drawbacks are their low solubility in common solvents and their poor mechanical properties. Elaboration of composites associating a matrix, bringing its mechanical properties, and polyaniline, as the conducting polymer, is a way of overcoming these disadvantages. Chitosan-graft-polyaniline copolymers were synthesized by simple oxidative method. The grafting reaction was quite complete, and it was found that the copolymers cross-linked to yield a composite hydrogel in which the polyaniline was homogeneously embedded. The conductivity of precursor (block copolymer) and gels was found to be larger than 10(-2) S x cm(-1). The composite gels were characterized in terms of swelling and rheological properties. They can be classified as "superabsorbent" hydrogels, and the swelling is reversible. The composite gels were then successfully used as actuators.
authors.affiliation: Universite de Pau et des Pays de l'Adour, IPREM/EPCP, UMR 5254 CNRS/UPPA, Helioparc Pau Pyrenees, 2 Avenue P. Angot, 64053 PAU cedex 09, France.
authors.forename: P
authors.initials: P
authors.lastname: Marcasuzaa
authors.forename: S
authors.initials: S
authors.lastname: Reynaud
authors.forename: F
authors.initials: F
authors.lastname: Ehrenfeld
authors.forename: A
authors.initials: A
authors.lastname: Khoukh
authors.forename: J
authors.initials: J
authors.lastname: Desbrieres
mesh_terms: D000814:Aniline Compounds / Q000138:chemical synthesis* / Q000737:chemistry*; D048271:Chitosan / Q000031:analogs & derivatives* / Q000138:chemical synthesis / Q000737:chemistry*; D004553:Electric Conductivity; D020100:Hydrogels / Q000138:chemical synthesis* / Q000737:chemistry; D006860:Hydrogen Bonding; D009682:Magnetic Resonance Spectroscopy; D055595:Mechanical Phenomena; D015394:Molecular Structure; D010084:Oxidation-Reduction; D011108:Polymers / Q000138:chemical synthesis* / Q000737:chemistry; D012212:Rheology; D012995:Solubility
chemical_list: D000814:Aniline Compounds; D020100:Hydrogels; D011108:Polymers; C553275:chitosan-graft-polyaniline; C416807:polyaniline; D048271:Chitosan