Design of Novel PLA/OMMT Films with Improved Gas Barrier and Mechanical Properties by Intercalating OMMT Interlayer with High Gas Barrier Polymers

Polymer/clay composites are an innovative class of materials. In this study, we present a facile method for the preparation of biodegradable and robust PLA/organomodified montmorillonite (OMMT) composite films with excellent gas barrier performance. When the design of PLA/OMMT composite films, in ad...

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Autores principales:	Abdul Shakoor Shar, Caili Zhang, Xieqing Song, Yunxuan Weng, Qiuyue Du
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	poly(lactic acid) OMMT gas barrier films nanocomposites Organic chemistry QD241-441
Acceso en línea:	https://doaj.org/article/c42c5f17e57243369bccf1d71e6a2e92
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spelling	oai:doaj.org-article:c42c5f17e57243369bccf1d71e6a2e922021-11-25T18:48:47ZDesign of Novel PLA/OMMT Films with Improved Gas Barrier and Mechanical Properties by Intercalating OMMT Interlayer with High Gas Barrier Polymers10.3390/polym132239622073-4360https://doaj.org/article/c42c5f17e57243369bccf1d71e6a2e922021-11-01T00:00:00Zhttps://www.mdpi.com/2073-4360/13/22/3962https://doaj.org/toc/2073-4360Polymer/clay composites are an innovative class of materials. In this study, we present a facile method for the preparation of biodegradable and robust PLA/organomodified montmorillonite (OMMT) composite films with excellent gas barrier performance. When the design of PLA/OMMT composite films, in addition to making OMMT have good intercalation effect in the matrix, the compatibility of intercalating polymer and matrix should also be considered. In this work, two polymers with high gas barrier properties, namely poly(vinyl alcohol) (PVA) and ethylene vinyl alcohol copolymer (EVOH), were selected to intercalate OMMT. The morphology and microstructures of the prepared PLA/PVA/OMMT and PLA/EVOH/OMMT composites were characterized by the X-ray diffraction measurement, scanning electron microscopy, and differential scanning calorimetry. It was shown that the good dispersibility of PVA in the PLA matrix, rather than the intercalation effect, was responsible for the improved gas barrier and mechanical properties of PLA/PVA/OMMT composite. The elongation at break increases from 4.5% to 22.7% when 1 wt % PVA is added to PLA/OMMT. Moreover, gas barrier of PLA/PVA1/OMMT measured as O<sub>2</sub> permeability is 52.8% higher than that of neat PLA. This work provides a route to intercalate OMMT interlayer with high gas barrier polymers and thus can be a useful reference to fabricate PLA/OMMT composites with improved gas barrier and mechanical properties. A comparison of oxygen permeabilities with existing commercial packaging films indicates that the biodegradable PLA/PVA/OMMT may serve as a viable substitute for packaging film applications.Abdul Shakoor SharCaili ZhangXieqing SongYunxuan WengQiuyue DuMDPI AGarticlepoly(lactic acid)OMMTgas barrier filmsnanocompositesOrganic chemistryQD241-441ENPolymers, Vol 13, Iss 3962, p 3962 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	poly(lactic acid) OMMT gas barrier films nanocomposites Organic chemistry QD241-441
spellingShingle	poly(lactic acid) OMMT gas barrier films nanocomposites Organic chemistry QD241-441 Abdul Shakoor Shar Caili Zhang Xieqing Song Yunxuan Weng Qiuyue Du Design of Novel PLA/OMMT Films with Improved Gas Barrier and Mechanical Properties by Intercalating OMMT Interlayer with High Gas Barrier Polymers
description	Polymer/clay composites are an innovative class of materials. In this study, we present a facile method for the preparation of biodegradable and robust PLA/organomodified montmorillonite (OMMT) composite films with excellent gas barrier performance. When the design of PLA/OMMT composite films, in addition to making OMMT have good intercalation effect in the matrix, the compatibility of intercalating polymer and matrix should also be considered. In this work, two polymers with high gas barrier properties, namely poly(vinyl alcohol) (PVA) and ethylene vinyl alcohol copolymer (EVOH), were selected to intercalate OMMT. The morphology and microstructures of the prepared PLA/PVA/OMMT and PLA/EVOH/OMMT composites were characterized by the X-ray diffraction measurement, scanning electron microscopy, and differential scanning calorimetry. It was shown that the good dispersibility of PVA in the PLA matrix, rather than the intercalation effect, was responsible for the improved gas barrier and mechanical properties of PLA/PVA/OMMT composite. The elongation at break increases from 4.5% to 22.7% when 1 wt % PVA is added to PLA/OMMT. Moreover, gas barrier of PLA/PVA1/OMMT measured as O<sub>2</sub> permeability is 52.8% higher than that of neat PLA. This work provides a route to intercalate OMMT interlayer with high gas barrier polymers and thus can be a useful reference to fabricate PLA/OMMT composites with improved gas barrier and mechanical properties. A comparison of oxygen permeabilities with existing commercial packaging films indicates that the biodegradable PLA/PVA/OMMT may serve as a viable substitute for packaging film applications.
format	article
author	Abdul Shakoor Shar Caili Zhang Xieqing Song Yunxuan Weng Qiuyue Du
author_facet	Abdul Shakoor Shar Caili Zhang Xieqing Song Yunxuan Weng Qiuyue Du
author_sort	Abdul Shakoor Shar
title	Design of Novel PLA/OMMT Films with Improved Gas Barrier and Mechanical Properties by Intercalating OMMT Interlayer with High Gas Barrier Polymers
title_short	Design of Novel PLA/OMMT Films with Improved Gas Barrier and Mechanical Properties by Intercalating OMMT Interlayer with High Gas Barrier Polymers
title_full	Design of Novel PLA/OMMT Films with Improved Gas Barrier and Mechanical Properties by Intercalating OMMT Interlayer with High Gas Barrier Polymers
title_fullStr	Design of Novel PLA/OMMT Films with Improved Gas Barrier and Mechanical Properties by Intercalating OMMT Interlayer with High Gas Barrier Polymers
title_full_unstemmed	Design of Novel PLA/OMMT Films with Improved Gas Barrier and Mechanical Properties by Intercalating OMMT Interlayer with High Gas Barrier Polymers
title_sort	design of novel pla/ommt films with improved gas barrier and mechanical properties by intercalating ommt interlayer with high gas barrier polymers
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/c42c5f17e57243369bccf1d71e6a2e92
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Design of Novel PLA/OMMT Films with Improved Gas Barrier and Mechanical Properties by Intercalating OMMT Interlayer with High Gas Barrier Polymers

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