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Influence of melt processing on biodegradable nisin‐ PBAT films intended for active food packaging applications
Author(s) -
Zehetmeyer Gislene,
Meira Stela Maris Meister,
Scheibel Jóice Maria,
de Oliveira Ricardo Vinicius Bof,
Brandelli Adriano,
Soares Rosane Michele Duarte
Publication year - 2016
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.43212
Subject(s) - nisin , antimicrobial , materials science , adipate , ultimate tensile strength , listeria monocytogenes , food packaging , crystallization , scanning electron microscope , chemical engineering , food science , chemistry , composite material , bacteria , organic chemistry , genetics , biology , engineering
Biodegradable poly(butylene adipate‐ co ‐terephthalate) (PBAT) films incorporated with different levels of the antimicrobial peptide nisin were developed by melt processing. Structural, morphological, thermal, mechanical, and antimicrobial properties of the films were determined. The X‐ray diffraction patterns exhibited decreasing levels of intensity at 2θ values as the concentration of nisin increased. Scanning electron microscopy showed a heterogeneous morphology when higher amounts of nisin were incorporated. The antimicrobial films tested presented no significant differences in the melting temperature (123–125°C), and the crystallization temperature ranged from 69 to 75°C. The addition of nisin caused no significant modification in tensile strength values. However, results of Young's modulus and deformation at break differed significantly among samples. Active films demonstrated inhibition against the Gram‐positive bacterium Listeria monocytogenes . These results demonstrated that PBAT/nisin films produced by melt processing present a great potential for use as active food packaging materials aiming enhanced food safety. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016 , 133 , 43212.