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...
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-05-01
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| Series: | Polymers |
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| Online Access: | https://www.mdpi.com/2073-4360/12/5/1095 |
| _version_ | 1797568282281115648 |
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| author | Shuvra Singha Mikael S. Hedenqvist |
| author_facet | Shuvra Singha Mikael S. Hedenqvist |
| author_sort | Shuvra Singha |
| collection | DOAJ |
| 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. |
| first_indexed | 2024-03-10T19:54:16Z |
| format | Article |
| id | doaj.art-29a92183f8c14f2f921137b9ce6330c7 |
| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-03-10T19:54:16Z |
| publishDate | 2020-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Polymers |
| spelling | doaj.art-29a92183f8c14f2f921137b9ce6330c72023-11-20T00:05:04ZengMDPI AGPolymers2073-43602020-05-01125109510.3390/polym12051095A Review on Barrier Properties of Poly(Lactic Acid)/Clay NanocompositesShuvra Singha0Mikael S. Hedenqvist1KTH Royal Institute of Technology, School of Engineering Sciences in Chemistry, Biotechnology and Health, Department of Fibre and Polymer Technology, SE-100 44 Stockholm, SwedenKTH Royal Institute of Technology, School of Engineering Sciences in Chemistry, Biotechnology and Health, Department of Fibre and Polymer Technology, SE-100 44 Stockholm, SwedenPoly(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.https://www.mdpi.com/2073-4360/12/5/1095barrier propertiespoly(lactic acid)claynanocompositepermeability |
| spellingShingle | Shuvra Singha Mikael S. Hedenqvist A Review on Barrier Properties of Poly(Lactic Acid)/Clay Nanocomposites Polymers barrier properties poly(lactic acid) clay nanocomposite permeability |
| 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 | barrier properties poly(lactic acid) clay nanocomposite permeability |
| url | https://www.mdpi.com/2073-4360/12/5/1095 |
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