Theoretical and experimental investigation of selective gas permeability in polystyrene/polyolefin elastomer/nanoclay nanocomposite films
Nanoclay (NC) has gas barrier properties that, when used in food packaging, protects food against spoilage. Moreover, food packaging frequently makes use of rigid and foamed polystyrene (PS). In this work, reactive blending in a co-rotating twin-screw extruder was used to process PS, polyolefin elas...
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| Format: | Article |
| Language: | English |
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Elsevier
2023-03-01
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| Series: | Polymer Testing |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0142941823000405 |
| _version_ | 1797884513050689536 |
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| author | Saba Nemati Mahand Amirhosein Yazdanbakhsh Mohammad Iman Tayouri Aliakbar Zarei Sasan Nouranian Holger Ruckdäschel Hossein Ali Khonakdar |
| author_facet | Saba Nemati Mahand Amirhosein Yazdanbakhsh Mohammad Iman Tayouri Aliakbar Zarei Sasan Nouranian Holger Ruckdäschel Hossein Ali Khonakdar |
| author_sort | Saba Nemati Mahand |
| collection | DOAJ |
| description | Nanoclay (NC) has gas barrier properties that, when used in food packaging, protects food against spoilage. Moreover, food packaging frequently makes use of rigid and foamed polystyrene (PS). In this work, reactive blending in a co-rotating twin-screw extruder was used to process PS, polyolefin elastomer (POE), and NC blends, leading to microphase-separated PS/POE/NC nanocomposite films. The structural and CO2 and N2 barrier properties of the resulting films were determined. The distribution of the NC platelets in the blends was theoretically predicted using the wetting coefficients. Nearly all NC platelets were found in the PS phase, in agreement with the theoretical predictions. Moreover, the NC platelets were found to be concentrated at the interfacial zones between the polymer phases when a compatibilizer was added to the blend. Scanning electron microscopy, wide-angle X-ray scattering, and transmission electron microscopy were used to examine the microstructure of the PS/POE/NC nanocomposites. Adding NCs as a gas barrier component to the PS/POE blend resulted in a decrease in CO2 and N2 permeability. For a better understanding of the gas diffusion in the pure PS and POE, as well as PS/POE blend, molecular dynamics simulations were performed to enable the calculation of gas diffusion coefficients in the different systems. The simulation results confirmed the experimental trends observed in this work. |
| first_indexed | 2024-04-10T04:08:50Z |
| format | Article |
| id | doaj.art-e24d9bda59a44758b7d128c55dc0c733 |
| institution | Directory Open Access Journal |
| issn | 0142-9418 |
| language | English |
| last_indexed | 2024-04-10T04:08:50Z |
| publishDate | 2023-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Polymer Testing |
| spelling | doaj.art-e24d9bda59a44758b7d128c55dc0c7332023-03-13T04:15:01ZengElsevierPolymer Testing0142-94182023-03-01120107960Theoretical and experimental investigation of selective gas permeability in polystyrene/polyolefin elastomer/nanoclay nanocomposite filmsSaba Nemati Mahand0Amirhosein Yazdanbakhsh1Mohammad Iman Tayouri2Aliakbar Zarei3Sasan Nouranian4Holger Ruckdäschel5Hossein Ali Khonakdar6Department of Polymer Engineering, Amirkabir University of Technology, Tehran, IranDepartment of Polymer Processing, Iran Polymer and Petrochemical Institute, Tehran, IranDepartment of Polymer Processing, Iran Polymer and Petrochemical Institute, Tehran, IranDepartment of Polymer Engineering, Amirkabir University of Technology, Tehran, IranDepartment of Chemical Engineering, University of Mississippi, University, MS, 38677, United States; Center for Graphene Research and Innovation, University of Mississippi, University, MS, 38677, United StatesDepartment of Polymer Engineering, University of Bayreuth, 95447, Bayreuth, GermanyDepartment of Polymer Processing, Iran Polymer and Petrochemical Institute, Tehran, Iran; Corresponding author.Nanoclay (NC) has gas barrier properties that, when used in food packaging, protects food against spoilage. Moreover, food packaging frequently makes use of rigid and foamed polystyrene (PS). In this work, reactive blending in a co-rotating twin-screw extruder was used to process PS, polyolefin elastomer (POE), and NC blends, leading to microphase-separated PS/POE/NC nanocomposite films. The structural and CO2 and N2 barrier properties of the resulting films were determined. The distribution of the NC platelets in the blends was theoretically predicted using the wetting coefficients. Nearly all NC platelets were found in the PS phase, in agreement with the theoretical predictions. Moreover, the NC platelets were found to be concentrated at the interfacial zones between the polymer phases when a compatibilizer was added to the blend. Scanning electron microscopy, wide-angle X-ray scattering, and transmission electron microscopy were used to examine the microstructure of the PS/POE/NC nanocomposites. Adding NCs as a gas barrier component to the PS/POE blend resulted in a decrease in CO2 and N2 permeability. For a better understanding of the gas diffusion in the pure PS and POE, as well as PS/POE blend, molecular dynamics simulations were performed to enable the calculation of gas diffusion coefficients in the different systems. The simulation results confirmed the experimental trends observed in this work.http://www.sciencedirect.com/science/article/pii/S0142941823000405Polystyrene/polyolefin elastomer blendsGas permeabilityMolecular dynamics simulationNanocomposite filmFood packaging |
| spellingShingle | Saba Nemati Mahand Amirhosein Yazdanbakhsh Mohammad Iman Tayouri Aliakbar Zarei Sasan Nouranian Holger Ruckdäschel Hossein Ali Khonakdar Theoretical and experimental investigation of selective gas permeability in polystyrene/polyolefin elastomer/nanoclay nanocomposite films Polymer Testing Polystyrene/polyolefin elastomer blends Gas permeability Molecular dynamics simulation Nanocomposite film Food packaging |
| title | Theoretical and experimental investigation of selective gas permeability in polystyrene/polyolefin elastomer/nanoclay nanocomposite films |
| title_full | Theoretical and experimental investigation of selective gas permeability in polystyrene/polyolefin elastomer/nanoclay nanocomposite films |
| title_fullStr | Theoretical and experimental investigation of selective gas permeability in polystyrene/polyolefin elastomer/nanoclay nanocomposite films |
| title_full_unstemmed | Theoretical and experimental investigation of selective gas permeability in polystyrene/polyolefin elastomer/nanoclay nanocomposite films |
| title_short | Theoretical and experimental investigation of selective gas permeability in polystyrene/polyolefin elastomer/nanoclay nanocomposite films |
| title_sort | theoretical and experimental investigation of selective gas permeability in polystyrene polyolefin elastomer nanoclay nanocomposite films |
| topic | Polystyrene/polyolefin elastomer blends Gas permeability Molecular dynamics simulation Nanocomposite film Food packaging |
| url | http://www.sciencedirect.com/science/article/pii/S0142941823000405 |
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