title: Effects of UV irradiation on the wettability of chitosan films containing dansyl derivatives.
abstract: The morphological and wetting properties of chitosan films containing dansyl derivatives have been investigated. By means of dynamic contact angle measurements, we study the modification of surface properties of chitosan-based films due to UV irradiation. The results were analyzed in the light of the molecular-kinetic theory which describes the wetting phenomena in terms of the statistical dynamics for the displacement of liquid molecules in a solid substrate. Our results show that the immobilization of dansyl groups in the chitosan backbone leads to a pronounced enhancement of the UV sensitivity of polymeric films.
authors.affiliation: Instituto de Fı´sica, Universidade Federal de Alagoas, 57072-970 Maceió-AL, Brazil.
authors.forename: A P P
authors.initials: AP
authors.lastname: Praxedes
authors.forename: A J C
authors.initials: AJ
authors.lastname: da Silva
authors.forename: R C
authors.initials: RC
authors.lastname: da Silva
authors.forename: R P A
authors.initials: RP
authors.lastname: Lima
authors.forename: J
authors.initials: J
authors.lastname: Tonholo
authors.forename: A S
authors.initials: AS
authors.lastname: Ribeiro
authors.forename: I N
authors.initials: IN
authors.lastname: de Oliveira
mesh_terms: D048271:Chitosan / Q000737:chemistry*; D010713:Phosphatidylcholines / Q000737:chemistry*; D014466:Ultraviolet Rays; D017155:Wettability / Q000528:radiation effects*
chemical_list: C496906:1-myristoyl-2-(12-((5-dimethylamino-1-naphthalenesulfonyl)amino)dodecanoyl)-sn-glycero-3-phosphocholine; D010713:Phosphatidylcholines; D048271:Chitosan