title: Influence of the acid type in the production of chitosan films reinforced with bacterial nanocellulose.
abstract: Chitosan films reinforced with bacterial cellulose (BC) nanoribbons were studied to understand the influence of acid (acetic and lactic acids) on the reinforcing effect. For both acids, the maximum concentration of the reinforcing constituent was 5wt% with respect to the dry weight of chitosan. The infrared spectra, mechanical properties, morphology and antimicrobial activity of the films were analyzed. The results showed a difference between the acids in their behavior and effect on the reinforcement, with a tensile strength of 12.3MPa for the acetic acid films and 3.3MPa for the lactic acid films. Additionally, the bacterial inhibition tests were shown to be positive for the lactic acid films and negative for the acetic acid films. Therefore, exchanging the acid used in these films may be desirable for certain applications.
authors.affiliation: Facultad de Ingeniería Química, Universidad Pontificia Bolivariana, Circular 1° N° 70-01, Medellín, Colombia.
authors.forename: J
authors.initials: J
authors.lastname: Velásquez-Cock
authors.affiliation: Facultad de Ingeniería Química, Universidad Pontificia Bolivariana, Circular 1° N° 70-01, Medellín, Colombia.
authors.forename: E
authors.initials: E
authors.lastname: Ramírez
authors.affiliation: Facultad de Ingeniería Mecánica, Universidad Pontificia Bolivariana, Circular 1° N° 70-01, Medellín, Colombia.
authors.forename: S
authors.initials: S
authors.lastname: Betancourt
authors.affiliation: Centre de Recherches sur les Macromolécules Végétales (CERMAV-CNRS), BP 53, F-38041 Grenoble cedex 9, France.
authors.forename: J-L
authors.initials: JL
authors.lastname: Putaux
authors.affiliation: Facultad de Ingeniería Química, Universidad Pontificia Bolivariana, Circular 1° N° 70-01, Medellín, Colombia.
authors.forename: M
authors.initials: M
authors.lastname: Osorio
authors.affiliation: Facultad de Ingeniería Textil, Universidad Pontificia Bolivariana, Circular 1° N° 70-01, Medellín, Colombia.
authors.forename: C
authors.initials: C
authors.lastname: Castro
authors.affiliation: Facultad de Ingeniería Química, Universidad Pontificia Bolivariana, Circular 1° N° 70-01, Medellín, Colombia.
authors.forename: P
authors.initials: P
authors.lastname: Gañán
authors.affiliation: Facultad de Ingeniería Agroindustrial, Universidad Pontificia Bolivariana, Circular 1° N° 70-01, Medellín, Colombia. Electronic address: robin.zuluaga@upb.edu.co.
authors.forename: R
authors.initials: R
authors.lastname: Zuluaga
mesh_terms: D019342:Acetic Acid / Q000737:chemistry*; D002482:Cellulose / Q000096:biosynthesis* / Q000737:chemistry*; D048271:Chitosan / Q000737:chemistry*; D018857:Food Packaging; D041821:Gluconacetobacter / Q000378:metabolism*; D019344:Lactic Acid / Q000737:chemistry*; D049329:Nanostructures / Q000737:chemistry*
chemical_list: D019344:Lactic Acid; D002482:Cellulose; D048271:Chitosan; D019342:Acetic Acid
keywords: Acetic acid; Antimicrobial films; Bacterial cellulose nanoribbons; Chitosan; Lactic acid