In situ self-assembly chitosan/ε-polylysine bionanocomposite film with enhanced antimicrobial properties for food packaging.
Int J Biol Macromol
; 132: 385-392, 2019 Jul 01.
Article
in En
| MEDLINE
| ID: mdl-30904525
ABSTRACT
A set of chitosan/ε-polylysine (ε-PL) bionanocomposite films were prepared by a simple in situ self-assembly technique using sodium tripolyphosphate (TPP) as cross-linking agent. The physical, mechanical, structural, and antimicrobial properties of these films were investigated. Fourier infrared spectroscopy and X-ray diffraction showed that the introduction of TPP promoted the formation of hydrogen bonds and electrostatic interactions among functional groups of chitosan or ε-PL, which improved the tensile strength and decreased the water solubility, water vapor permeability and surface wettability of films. On the other hand, the incorporation of ε-PL weakened the bionanocomposite film' structure and integrity, resulting in a decrease trend of films' mechanical and barrier properties. More importantly, the bionanocomposite films exhibited excellent antimicrobial efficacy against E. coli and S. aureus by the increasing ratio of ε-PL. And ε-PL presented a sustained release from the films, which was closely related to TPP concentration. Results of this study suggested that chitosan/ε-PL films could be used as antimicrobial bio-material and have great potential in food industry.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Polylysine
/
Food Packaging
/
Chitosan
/
Nanocomposites
/
Anti-Bacterial Agents
Language:
En
Journal:
Int J Biol Macromol
Year:
2019
Document type:
Article