title: Effect of active packaging incorporated with triclosan on bacteria adhesion.
abstract: Antimicrobial polyethylene and cellulose based films incorporated with triclosan were studied. The antimicrobial efficacy, the hydrophobicity, microscopic and the mechanical characteristics of the films, as well free energy of adhesion between bacteria and antimicrobial films were evaluated. It was observed that both polyethylene and cellulose based films incorporated with the antimicrobial were homogeneous. Furthermore, the addition of triclosan did not affect mechanical characteristics of the films (P > 0.05). However, triclosan incorporated into polyethylene films reduced its hydrophobicity while antimicrobial cellulose based films became more hydrophobic. The adhesion was thermodynamically favorable between tested bacteria and polyethylene films. On the other hand, the adhesion to triclosan cellulose based film was thermodynamically unfavorable to Staphylococcus aureus and Escherichia coli and favorable to Listeria innocua and Pseudomonas aeruginosa. Polyethylene and cellulose based films showed inhibitory effect against S. aureus and E. coli, being the inhibition halo higher for polyethylene films. This study improves the knowledge about antimicrobial films.
authors.affiliation: Food Technology Dept., Federal Univ. of Viçosa, Av. PH Rolfs s/n, Campus Universitário, 36571-000, Viçosa, MG, Brazil.
authors.forename: Geany P
authors.initials: GP
authors.lastname: Camilloto
authors.forename: Ana Clarissa S
authors.initials: AC
authors.lastname: Pires
authors.forename: Nilda de Fátima F
authors.initials: Nde F
authors.lastname: Soares
authors.forename: Emiliane A
authors.initials: EA
authors.lastname: Araújo
authors.forename: Nélio J
authors.initials: NJ
authors.lastname: Andrade
authors.forename: Sukarno O
authors.initials: SO
authors.lastname: Ferreira
mesh_terms: D000890:Anti-Infective Agents / Q000737:chemistry / Q000494:pharmacology*; D001422:Bacterial Adhesion / Q000187:drug effects*; D002482:Cellulose / Q000737:chemistry*; D055598:Chemical Phenomena; D052978:Disk Diffusion Antimicrobial Tests; D055119:Elastic Modulus; D004926:Escherichia coli / Q000187:drug effects; D018857:Food Packaging; D057927:Hydrophobic and Hydrophilic Interactions; D008087:Listeria / Q000187:drug effects; D055595:Mechanical Phenomena; D018625:Microscopy, Atomic Force; D008855:Microscopy, Electron, Scanning; D020959:Polyethylene / Q000737:chemistry*; D011550:Pseudomonas aeruginosa / Q000187:drug effects; D013211:Staphylococcus aureus / Q000187:drug effects; D013499:Surface Properties; D013718:Tensile Strength; D013816:Thermodynamics; D014260:Triclosan / Q000737:chemistry / Q000494:pharmacology*
chemical_list: D000890:Anti-Infective Agents; D014260:Triclosan; D020959:Polyethylene; D002482:Cellulose