Influence of Glycerol and SISAL Microfiber Contents on the Thermal and Tensile Properties of Thermoplastic Starch Composites.

Autor: de Vilhena MB; Engineering of Natural Resources of the Amazon Program, Federal University of Pará-UFPA, Belem 66075-110, Brazil., Matos RM; Faculty of Materials Engineering, Federal University of Pará-UFPA, Ananindeua 67130-660, Brazil., Ramos Junior GSDS; Materials Science and Engineering Program, Federal University of Pará-UFPA, Ananindeua 67130-660, Brazil., Viegas BM; Faculty of Biotechnology, Federal University of Pará-UFPA, Belem 66075-110, Brazil., da Silva Junior CAB; Materials Science and Engineering Program, Federal University of Pará-UFPA, Ananindeua 67130-660, Brazil., Macedo EN; Engineering of Natural Resources of the Amazon Program, Federal University of Pará-UFPA, Belem 66075-110, Brazil., Paula MVDS; Materials Science and Engineering Program, Federal University of Pará-UFPA, Ananindeua 67130-660, Brazil., da Silva Souza JA; Engineering of Natural Resources of the Amazon Program, Federal University of Pará-UFPA, Belem 66075-110, Brazil., Candido VS; Materials Science and Engineering Program, Federal University of Pará-UFPA, Ananindeua 67130-660, Brazil., de Sousa Cunha EJ; Faculty of Materials Engineering, Federal University of Pará-UFPA, Ananindeua 67130-660, Brazil.
Jazyk: angličtina
Zdroj: Polymers [Polymers (Basel)] 2023 Oct 19; Vol. 15 (20). Date of Electronic Publication: 2023 Oct 19.
DOI: 10.3390/polym15204141
Abstrakt: The increasing use of petroleum plastics has caused environmental damage due to the degradation time of these materials. An alternative to petroleum plastics could be thermoplastic starch (TPS). However, thermoplastic starch does not exhibit satisfactory tensile properties. The mechanical properties of thermoplastic starch can be improved by adding sisal microfibers. Thus, the objective of this study was to evaluate the influence of different levels of glycerol and sisal microfibers on the thermal and tensile properties of thermoplastic corn starch composites. The microfibers were obtained via mechanical treatment followed by chemical treatment (alkaline treatment and bleaching). The films were obtained by the casting method using commercial corn starch and glycerol as a plasticizing agent, reinforced with sisal microfibers. Fourier transform infrared spectroscopy (FTIR) results revealed that the addition of microfibers did not change the chemical structure of the TPS matrix. The films from the samples with 18% glycerol and 10% microfibers had the highest value for the maximum tension, equal to 4.78 MPa. The thermal decomposition profile of TPS was not altered by the addition of microfibers. Our findings demonstrated the profound influence of glycerol and microfiber contents on the tensile properties of thermoplastic starch composites.
Databáze: MEDLINE
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