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A Review on Barrier Properties of Poly(Lactic Acid)/Clay Nanocomposites
Poly(lactic acid) (PLA) is considered to be among the best biopolymer substitutes for the existing petroleum-based polymers in the field of food packaging owing to its renewability, biodegradability, non-toxicity and mechanical properties. However, PLA displays only moderate barrier properties to ga...
Autores principales: | , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7285356/ https://www.ncbi.nlm.nih.gov/pubmed/32403371 http://dx.doi.org/10.3390/polym12051095 |
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author | Singha, Shuvra Hedenqvist, Mikael S. |
author_facet | Singha, Shuvra Hedenqvist, Mikael S. |
author_sort | Singha, Shuvra |
collection | PubMed |
description | Poly(lactic acid) (PLA) is considered to be among the best biopolymer substitutes for the existing petroleum-based polymers in the field of food packaging owing to its renewability, biodegradability, non-toxicity and mechanical properties. However, PLA displays only moderate barrier properties to gases, vapors and organic compounds, which can limit its application as a packaging material. Hence, it becomes essential to understand the mass transport properties of PLA and address the transport challenges. Significant improvements in the barrier properties can be achieved by incorporating two-dimensional clay nanofillers, the planes of which create tortuosity to the diffusing molecules, thereby increasing the effective length of the diffusion path. This article reviews the literature on barrier properties of PLA/clay nanocomposites. The important PLA/clay nanocomposite preparation techniques, such as solution intercalation, melt processing and in situ polymerization, are outlined followed by an extensive account of barrier performance of nanocomposites drawn from the literature. Fundamentals of mass transport phenomena and the factors affecting mass transport are also presented. Furthermore, mathematical models that have been proposed/used to predict the permeability in polymer/clay nanocomposites are reviewed and the extent to which the models are validated in PLA/clay composites is discussed. |
format | Online Article Text |
id | pubmed-7285356 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-72853562020-06-17 A Review on Barrier Properties of Poly(Lactic Acid)/Clay Nanocomposites Singha, Shuvra Hedenqvist, Mikael S. Polymers (Basel) Review Poly(lactic acid) (PLA) is considered to be among the best biopolymer substitutes for the existing petroleum-based polymers in the field of food packaging owing to its renewability, biodegradability, non-toxicity and mechanical properties. However, PLA displays only moderate barrier properties to gases, vapors and organic compounds, which can limit its application as a packaging material. Hence, it becomes essential to understand the mass transport properties of PLA and address the transport challenges. Significant improvements in the barrier properties can be achieved by incorporating two-dimensional clay nanofillers, the planes of which create tortuosity to the diffusing molecules, thereby increasing the effective length of the diffusion path. This article reviews the literature on barrier properties of PLA/clay nanocomposites. The important PLA/clay nanocomposite preparation techniques, such as solution intercalation, melt processing and in situ polymerization, are outlined followed by an extensive account of barrier performance of nanocomposites drawn from the literature. Fundamentals of mass transport phenomena and the factors affecting mass transport are also presented. Furthermore, mathematical models that have been proposed/used to predict the permeability in polymer/clay nanocomposites are reviewed and the extent to which the models are validated in PLA/clay composites is discussed. MDPI 2020-05-11 /pmc/articles/PMC7285356/ /pubmed/32403371 http://dx.doi.org/10.3390/polym12051095 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Review Singha, Shuvra Hedenqvist, Mikael S. A Review on Barrier Properties of Poly(Lactic Acid)/Clay Nanocomposites |
title | A Review on Barrier Properties of Poly(Lactic Acid)/Clay Nanocomposites |
title_full | A Review on Barrier Properties of Poly(Lactic Acid)/Clay Nanocomposites |
title_fullStr | A Review on Barrier Properties of Poly(Lactic Acid)/Clay Nanocomposites |
title_full_unstemmed | A Review on Barrier Properties of Poly(Lactic Acid)/Clay Nanocomposites |
title_short | A Review on Barrier Properties of Poly(Lactic Acid)/Clay Nanocomposites |
title_sort | review on barrier properties of poly(lactic acid)/clay nanocomposites |
topic | Review |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7285356/ https://www.ncbi.nlm.nih.gov/pubmed/32403371 http://dx.doi.org/10.3390/polym12051095 |
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