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A Review on Barrier Properties of Poly(Lactic Acid)/Clay Nanocomposites
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Fibre- and Polymer Technology.ORCID iD: 0000-0002-4969-2613
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Fibre- and Polymer Technology, Polymeric Materials.ORCID iD: 0000-0002-6071-6241
2020 (English)In: Polymers, E-ISSN 2073-4360, Vol. 12, no 5, article id 1095Article, review/survey (Refereed) Published
Abstract [en]

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.

Place, publisher, year, edition, pages
MDPI , 2020. Vol. 12, no 5, article id 1095
Keywords [en]
barrier properties, poly(lactic acid), clay, nanocomposite, permeability
National Category
Bio Materials
Identifiers
URN: urn:nbn:se:kth:diva-278425DOI: 10.3390/polym12051095ISI: 000541431100100PubMedID: 32403371Scopus ID: 2-s2.0-85085729594OAI: oai:DiVA.org:kth-278425DiVA, id: diva2:1453508
Note

QC 20200710

Available from: 2020-07-10 Created: 2020-07-10 Last updated: 2024-01-17Bibliographically approved

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Singha, ShuvraHedenqvist, Mikael S.

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