Characterization and bacterial adhesion of chitosan-perfluorinatedacid films.

KARINA BIERBRAUER; ROXANA ALASINO; ADRIAN MUÑOZ; DANTE BELTRAMO; MIRIAM STRUMIA

ELSEVIER SCIENCE BV

Lugar: Amsterdam; Año: 2014 vol. 114 p. 201 - 201

We reported herein the study and characterization of films obtained by casting of chitosan solutionsin perfluorinated acids, trifluoroacetic (TFA), perfluoropropionic (PFPA), and perfluorooctanoic (PFOA).The films were characterized by FTIR, solid state13C NMR, X-ray, AFM, contact angle, thermogravimetriceffluent analysis by mass spectrometry, and rheology. The results showed a marked influence of chainlength of the perfluorinated acids on the hydrophobic/hydrophilic ratio of the modified chitosan filmswhich was evidenced by the different characteristics observed.The material that showed greater surface stability was chitosan-PFOA. Chitosan film with the additionof PFOA modifier became more hydrophobic, thus water vapor permeability diminished compared tochitosan films alone, this new material also depicted bacterial adhesion which, together with the featuresalready described, proves its potential in applications for bioreactor coating.