Physical-Mechanical Behavior and Water-Barrier Properties of Biopolymers-Clay Nanocomposites
The preparation and characterization of biodegradable films based on starch-PVA-nanoclay by solvent casting are reported in this study. The films were prepared with a relation of 3:2 of starch:PVA and nanoclay (0.5, 1.0, and 1.5% <i>w</i>/<i>v</i>), and glycerol as plasticize...
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| Format: | Article |
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MDPI AG
2021-11-01
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| Series: | Molecules |
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| Online Access: | https://www.mdpi.com/1420-3049/26/21/6734 |
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| author | Heidy Lorena Calambas Abril Fonseca Dayana Adames Yaneli Aguirre-Loredo Carolina Caicedo |
| author_facet | Heidy Lorena Calambas Abril Fonseca Dayana Adames Yaneli Aguirre-Loredo Carolina Caicedo |
| author_sort | Heidy Lorena Calambas |
| collection | DOAJ |
| description | The preparation and characterization of biodegradable films based on starch-PVA-nanoclay by solvent casting are reported in this study. The films were prepared with a relation of 3:2 of starch:PVA and nanoclay (0.5, 1.0, and 1.5% <i>w</i>/<i>v</i>), and glycerol as plasticizer. The nanoclays before being incorporated in the filmogenic solution of starch-PVA were dispersed in two ways: by magnetic stirring and by sonication. The SEM results suggest that the sonication of nanoclay is necessary to reach a good dispersion along the polymeric matrix. FTIR results of films with 1.0 and 1.5% <i>w</i>/<i>v</i> of sonicated nanoclay suggest a strong interaction of hydrogen bond with the polymeric matrix of starch-PVA. However, the properties of WVP, tensile strength, percentage of elongation at break, and Young’s modulus improved to the film with sonicated nanoclay at 0.5% <i>w</i>/<i>v</i>, while in films with 1.0 and 1.5% <i>w</i>/<i>w</i> these properties were even worse than in film without nanoclay. Nanoclay concentrations higher than 1.0 <i>w</i>/<i>v</i> saturate the polymer matrix, affecting the physicochemical properties. Accordingly, the successful incorporation of nanoclays at 0.5% <i>w</i>/<i>v</i> into the matrix starch-PVA suggests that this film is a good candidate for use as biodegradable packaging. |
| first_indexed | 2024-03-10T05:54:59Z |
| format | Article |
| id | doaj.art-9008fded60f74bce9e9d55b00607ae16 |
| institution | Directory Open Access Journal |
| issn | 1420-3049 |
| language | English |
| last_indexed | 2024-03-10T05:54:59Z |
| publishDate | 2021-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Molecules |
| spelling | doaj.art-9008fded60f74bce9e9d55b00607ae162023-11-22T21:25:46ZengMDPI AGMolecules1420-30492021-11-012621673410.3390/molecules26216734Physical-Mechanical Behavior and Water-Barrier Properties of Biopolymers-Clay NanocompositesHeidy Lorena Calambas0Abril Fonseca1Dayana Adames2Yaneli Aguirre-Loredo3Carolina Caicedo4Grupo de Investigación en Desarrollo de Materiales y Productos, Centro Nacional de Asistencia Técnica a la Industria (ASTIN), SENA, Cali 760003, ColombiaCentro de Investigación en Química Aplicada (CIQA), Blvd. Enrique Reyna Hermosillo 140, Saltillo 25294, Coahuila, MexicoSemillero de Investigación en Química Aplicada (SEQUIA), Facultad de Ciencias Básicas, Universidad Santiago de Cali, Pampa linda, Santiago de Cali 760035, ColombiaCentro de Investigación en Química Aplicada (CIQA), Blvd. Enrique Reyna Hermosillo 140, Saltillo 25294, Coahuila, MexicoGrupo de Investigación en Química y Biotecnología (QUIBIO), Facultad de Ciencias Básicas, Universidad Santiago de Cali, Pampalinda, Santiago de Cali 760035, ColombiaThe preparation and characterization of biodegradable films based on starch-PVA-nanoclay by solvent casting are reported in this study. The films were prepared with a relation of 3:2 of starch:PVA and nanoclay (0.5, 1.0, and 1.5% <i>w</i>/<i>v</i>), and glycerol as plasticizer. The nanoclays before being incorporated in the filmogenic solution of starch-PVA were dispersed in two ways: by magnetic stirring and by sonication. The SEM results suggest that the sonication of nanoclay is necessary to reach a good dispersion along the polymeric matrix. FTIR results of films with 1.0 and 1.5% <i>w</i>/<i>v</i> of sonicated nanoclay suggest a strong interaction of hydrogen bond with the polymeric matrix of starch-PVA. However, the properties of WVP, tensile strength, percentage of elongation at break, and Young’s modulus improved to the film with sonicated nanoclay at 0.5% <i>w</i>/<i>v</i>, while in films with 1.0 and 1.5% <i>w</i>/<i>w</i> these properties were even worse than in film without nanoclay. Nanoclay concentrations higher than 1.0 <i>w</i>/<i>v</i> saturate the polymer matrix, affecting the physicochemical properties. Accordingly, the successful incorporation of nanoclays at 0.5% <i>w</i>/<i>v</i> into the matrix starch-PVA suggests that this film is a good candidate for use as biodegradable packaging.https://www.mdpi.com/1420-3049/26/21/6734biodegradable polymersnanocompositeultrasound-assistedmechanical propertiesmontmorillonite |
| spellingShingle | Heidy Lorena Calambas Abril Fonseca Dayana Adames Yaneli Aguirre-Loredo Carolina Caicedo Physical-Mechanical Behavior and Water-Barrier Properties of Biopolymers-Clay Nanocomposites Molecules biodegradable polymers nanocomposite ultrasound-assisted mechanical properties montmorillonite |
| title | Physical-Mechanical Behavior and Water-Barrier Properties of Biopolymers-Clay Nanocomposites |
| title_full | Physical-Mechanical Behavior and Water-Barrier Properties of Biopolymers-Clay Nanocomposites |
| title_fullStr | Physical-Mechanical Behavior and Water-Barrier Properties of Biopolymers-Clay Nanocomposites |
| title_full_unstemmed | Physical-Mechanical Behavior and Water-Barrier Properties of Biopolymers-Clay Nanocomposites |
| title_short | Physical-Mechanical Behavior and Water-Barrier Properties of Biopolymers-Clay Nanocomposites |
| title_sort | physical mechanical behavior and water barrier properties of biopolymers clay nanocomposites |
| topic | biodegradable polymers nanocomposite ultrasound-assisted mechanical properties montmorillonite |
| url | https://www.mdpi.com/1420-3049/26/21/6734 |
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