Reduced tensile properties of bacterial cellulose membranes after an accelerated composite temperature/humidity cyclic assay
Autor: | Horacio Vieyra, Eduardo San Martín-Martínez, Joan Manuel Molina-Romero, Andrea Guevara-Morales, Bárbara Estefanía Arteaga-Ballesteros |
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Rok vydání: | 2021 |
Předmět: |
Environmental Engineering
Materials science Polymers and Plastics Composite number Synthetic membrane Humidity 02 engineering and technology 021001 nanoscience & nanotechnology Biodegradable polymer humanities chemistry.chemical_compound Membrane 020401 chemical engineering chemistry Bacterial cellulose Ultimate tensile strength Materials Chemistry 0204 chemical engineering Composite material 0210 nano-technology Elastic modulus |
Zdroj: | Journal of Polymers and the Environment. 29:2349-2358 |
ISSN: | 1572-8919 1566-2543 |
Popis: | Bacterial cellulose (BC) membranes are an excellent ecopolymer product that has been proposed for many applications, including acoustic, biomedical, and fabrics. However, those uses require the membranes’ exposure to environmental conditions related to shelf storage, washing, or excess of humidity that are not usually evaluated when developing new materials. In this work, we investigated the effect of high and low temperature, and high humidity accelerated exposure on the physical and mechanical properties of BC membranes prepared from Kombucha fermentation. We prepared BC membranes following standard protocols and subjected them to a composite temperature/humidity accelerated cyclic assay. The mechanical and physical properties of the membranes were measured before and after the assay. We found that the ultimate tensile strength, elastic modulus, and elongation at break significantly changed after the assay. We also observed a few morphology changes, but no changes in the DSC and IR determinations. Our results suggest that environmental tests should be performed in every biodegradable polymer according to their intended use to determine their applications fully. |
Databáze: | OpenAIRE |
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