Performance of Poly(lactic acid) Surface Modified Films for Food Packaging Application

Abstract

Five Poly(lactic acid) (PLA) film samples were analyzed to study the gas barrier behavior, thermal stability and mechanical performance for food packaging application. O2, CO2, N2, N2O, and C2H4 pure gases; Air; and Modified Atmosphere (MA, 79% N2O/21% O2) were used to analyze the influence of the chemical structure, storage temperature and crystalline phase on the gas barrier behavior. The kinetic of the permeation process was investigated at different temperatures, ranging from 5 °C to 40 °C. Annealing thermal treatment on the samples led to the crystalline percentage, influencing especially the gas solubility process. Thermal properties such as Tg and χc, and mechanical properties such as tensile strength and modulus were remarkably improved with surface PLA modification. A more pronounced reinforcing effect was noted in the case of metallization, as well as improved gas barrier performance. Tensile testing and tensile cycling tests confirmed the rigidity of the films, with about a 20% loss of elasticity after 25 cycles loading.

Use of biodegradable materials as alternative packaging of typical Calabrian Provola cheese

“…The CO 2 TR of A film was one and two order of magnitude lower than B and C respectively, confirming that the presence of EVOH gives a good CO 2 barrier (Maes et al, 2017). Despite the molecular diameter of carbon dioxide is bigger than the molecule of oxygen, the CO 2 TR through the PLA polymer was very higher than the OTR, as also observed by Siracusa, Dalla Rosa, & Iordanskii (2017). This is due to the different behaviour of CO 2 in terms of solubility and diffusion through the polymeric chain.…”

Characterization and Evaluation of Controlled Antimicrobial Release from Petrochemical (PU) and Biodegradable (PHB) Packaging

“…For the development of active packaging materials, three classes of sustained polymers based on renewable sources are primarily used, namely polysaccharides (chitosan, cellulose, its derivatives and the like) [68], poly-α-hydroxyacides (polylactides, polyglycolides, and their copolymers) [65,69,70,71,72,73], and poly-β-hydroxyacides (polyalkanoates) with their basic representative-poly(3-hydroxybutyrate) [PHB] [24,74,75,76] that have attracted special attention in the framework of this paper. The combination of degradation ability and remedy absorption capacity was an inherent stimulus for this presentation.…”

Synthesis and characterizations of bis(phenoxy)‐amine tin(II) complexes for ring‐opening polymerization of lactide

“…Biodegradable polyesters are widely used in both academic and industrial applications as attractive alternatives to petroleum‐based polymers . Polylactide (PLA) is one of the most well‐known biodegradable polyesters due to its biodegradable and biocompatible properties and has been extensively employed in biomedical, agricultural, and food packaging areas . The modification of polymer architecture provides a crucial development in synthetic polymers that has broadened their range of applications as a result of altered thermal and physical properties.…”