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Nanocelluloses Reinforced Bio-Waterborne Polyurethane
The aim of this work was to evaluate the influence of two kinds of bio- nano-reinforcements, cellulose nanocrystals (CNCs) and bacterial cellulose (BC), on the properties of castor oil-based waterborne polyurethane (WBPU) films. CNCs were obtained by the acidolysis of microcrystalline cellulose, whi...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8434354/ https://www.ncbi.nlm.nih.gov/pubmed/34502892 http://dx.doi.org/10.3390/polym13172853 |
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author | Hormaiztegui, M. E. Victoria Marin, Diana Gañán, Piedad Stefani, Pablo Marcelo Mucci, Verónica Aranguren, Mirta I. |
author_facet | Hormaiztegui, M. E. Victoria Marin, Diana Gañán, Piedad Stefani, Pablo Marcelo Mucci, Verónica Aranguren, Mirta I. |
author_sort | Hormaiztegui, M. E. Victoria |
collection | PubMed |
description | The aim of this work was to evaluate the influence of two kinds of bio- nano-reinforcements, cellulose nanocrystals (CNCs) and bacterial cellulose (BC), on the properties of castor oil-based waterborne polyurethane (WBPU) films. CNCs were obtained by the acidolysis of microcrystalline cellulose, while BC was produced from Komagataeibacter medellinensis. A WBPU/BC composite was prepared by the impregnation of a wet BC membrane and further drying, while the WBPU/CNC composite was obtained by casting. The nanoreinforcement was adequately dispersed in the polymer using any of the preparation methods, obtaining optically transparent compounds. Thermal gravimetric analysis, Fourier-transform infrared spectroscopy, field emission scanning electron microscopy, dynamical mechanical analysis, differential scanning calorimetry, contact angle, and water absorption tests were carried out to analyze the chemical, physical, and thermal properties, as well as the morphology of nanocelluloses and composites. The incorporation of nanoreinforcements into the formulation increased the storage modulus above the glass transition temperature of the polymer. The thermal stability of the BC-reinforced composites was slightly higher than that of the CNC composites. In addition, BC allowed maintaining the structural integrity of the composites films, when they were immersed in water. The results were related to the relatively high thermal stability and the particular three-dimensional interconnected reticular morphology of BC. |
format | Online Article Text |
id | pubmed-8434354 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-84343542021-09-12 Nanocelluloses Reinforced Bio-Waterborne Polyurethane Hormaiztegui, M. E. Victoria Marin, Diana Gañán, Piedad Stefani, Pablo Marcelo Mucci, Verónica Aranguren, Mirta I. Polymers (Basel) Article The aim of this work was to evaluate the influence of two kinds of bio- nano-reinforcements, cellulose nanocrystals (CNCs) and bacterial cellulose (BC), on the properties of castor oil-based waterborne polyurethane (WBPU) films. CNCs were obtained by the acidolysis of microcrystalline cellulose, while BC was produced from Komagataeibacter medellinensis. A WBPU/BC composite was prepared by the impregnation of a wet BC membrane and further drying, while the WBPU/CNC composite was obtained by casting. The nanoreinforcement was adequately dispersed in the polymer using any of the preparation methods, obtaining optically transparent compounds. Thermal gravimetric analysis, Fourier-transform infrared spectroscopy, field emission scanning electron microscopy, dynamical mechanical analysis, differential scanning calorimetry, contact angle, and water absorption tests were carried out to analyze the chemical, physical, and thermal properties, as well as the morphology of nanocelluloses and composites. The incorporation of nanoreinforcements into the formulation increased the storage modulus above the glass transition temperature of the polymer. The thermal stability of the BC-reinforced composites was slightly higher than that of the CNC composites. In addition, BC allowed maintaining the structural integrity of the composites films, when they were immersed in water. The results were related to the relatively high thermal stability and the particular three-dimensional interconnected reticular morphology of BC. MDPI 2021-08-25 /pmc/articles/PMC8434354/ /pubmed/34502892 http://dx.doi.org/10.3390/polym13172853 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Hormaiztegui, M. E. Victoria Marin, Diana Gañán, Piedad Stefani, Pablo Marcelo Mucci, Verónica Aranguren, Mirta I. Nanocelluloses Reinforced Bio-Waterborne Polyurethane |
title | Nanocelluloses Reinforced Bio-Waterborne Polyurethane |
title_full | Nanocelluloses Reinforced Bio-Waterborne Polyurethane |
title_fullStr | Nanocelluloses Reinforced Bio-Waterborne Polyurethane |
title_full_unstemmed | Nanocelluloses Reinforced Bio-Waterborne Polyurethane |
title_short | Nanocelluloses Reinforced Bio-Waterborne Polyurethane |
title_sort | nanocelluloses reinforced bio-waterborne polyurethane |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8434354/ https://www.ncbi.nlm.nih.gov/pubmed/34502892 http://dx.doi.org/10.3390/polym13172853 |
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