Influence of melt processing on biodegradable nisin‐PBAT films intended for active food packaging applications

Abstract

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 2h 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 (123-1258C), and the crystallization temperature ranged from 69 to 758C. 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. V C 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 43212.

Improvement of PBAT Processability and Mechanical Performance by Blending with Pine Resin Derivatives for Injection Moulding Rigid Packaging with Enhanced Hydrophobicity

“…The first one is between 326 and 450 • C and is attributed to the maximum decomposition of aliphatic co-polyester adipic acid and 1,4-butanediol. The second one occurs at around 490 • C, and is associated with the decomposition of aromatic co-polyester terephthalic acid [55,56].…”

Compostable composites of wheat stalk micro‐ and nanocrystalline cellulose and poly(butylene adipate‐co‐terephthalate): Surface properties and degradation behavior

“…[36][37][38][39] The microscopic results also provide important clues on the dispersion and possible segregation of any of the components in a composite material. [37][38][39][40][41] The closer look at the low-resolution SEM micrograph of the composite in Figure 1(a) towards any of the edges of the specimen shows primarily the surface coverage by the PBAT phase as there is no clear sign of MCC particles (shown by white arrows) present at the surface.…”

“…These results are in consistence with the conclusions drawn in similar works reported in the literature including blends and composites with chitosan, 22 starch, 34 clay, 35 and other systems comprising polylactides and other degradable systems. [36][37][38][39] The microscopic results also provide important clues on the dispersion and possible segregation of any of the components in a composite material. [37][38][39][40][41] The closer look at the low-resolution SEM micrograph of the composite in Figure 1(a) towards any of the edges of the specimen shows primarily the surface coverage by the PBAT phase as there is no clear sign of MCC particles (shown by white arrows) present at the surface.…”

The Effect of Calcium Carbonate on the Photo‐Oxidative Behavior of Poly(butylene adipate‐co‐terephthalate)

“…In spite that PBAT was introduced into the market about one decade ago, the use of neat PBAT in packaging and agricultural films remains yet very limited because of inferior physical properties compared with many of the nonbiodegradable polymers traditionally used in these applications. [ 5–8 ]…”