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Volume 15
Issue 20
10.3390/polym15204141
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Article

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

by
Mailson Batista de Vilhena
1,
Rochelle Moraes Matos
2,
Gilberto Sérgio da Silva Ramos Junior
3,
Bruno Marques Viegas
4,
Carlos Alberto Brito da Silva Junior
3,
Emanuel Negrão Macedo
1,
Marcos Vinícius da Silva Paula
3,
José Antônio da Silva Souza
1,
Verônica Scarpini Candido
3,* and
Edinaldo José de Sousa Cunha
2
1
Engineering of Natural Resources of the Amazon Program, Federal University of Pará—UFPA, Belem 66075-110, Brazil
2
Faculty of Materials Engineering, Federal University of Pará-UFPA, Ananindeua 67130-660, Brazil
3
Materials Science and Engineering Program, Federal University of Pará—UFPA, Ananindeua 67130-660, Brazil
4
Faculty of Biotechnology, Federal University of Pará—UFPA, Belem 66075-110, Brazil
*
Author to whom correspondence should be addressed.
Polymers 2023, 15(20), 4141; https://doi.org/10.3390/polym15204141
Submission received: 30 August 2023 / Revised: 22 September 2023 / Accepted: 26 September 2023 / Published: 19 October 2023
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Abstract

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.
Keywords: glycerol; microfibers; composites; corn starch glycerol; microfibers; composites; corn starch

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MDPI and ACS Style

de Vilhena, M.B.; Matos, R.M.; Ramos Junior, G.S.d.S.; Viegas, B.M.; da Silva Junior, C.A.B.; Macedo, E.N.; Paula, M.V.d.S.; da Silva Souza, J.A.; Candido, V.S.; de Sousa Cunha, E.J. Influence of Glycerol and SISAL Microfiber Contents on the Thermal and Tensile Properties of Thermoplastic Starch Composites. Polymers 2023, 15, 4141. https://doi.org/10.3390/polym15204141

AMA Style

de Vilhena MB, Matos RM, Ramos Junior GSdS, Viegas BM, da Silva Junior CAB, Macedo EN, Paula MVdS, da Silva Souza JA, Candido VS, de Sousa Cunha EJ. Influence of Glycerol and SISAL Microfiber Contents on the Thermal and Tensile Properties of Thermoplastic Starch Composites. Polymers. 2023; 15(20):4141. https://doi.org/10.3390/polym15204141

Chicago/Turabian Style

de Vilhena, Mailson Batista, Rochelle Moraes Matos, Gilberto Sérgio da Silva Ramos Junior, Bruno Marques Viegas, Carlos Alberto Brito da Silva Junior, Emanuel Negrão Macedo, Marcos Vinícius da Silva Paula, José Antônio da Silva Souza, Verônica Scarpini Candido, and Edinaldo José de Sousa Cunha. 2023. "Influence of Glycerol and SISAL Microfiber Contents on the Thermal and Tensile Properties of Thermoplastic Starch Composites" Polymers 15, no. 20: 4141. https://doi.org/10.3390/polym15204141

APA Style

de Vilhena, M. B., Matos, R. M., Ramos Junior, G. S. d. S., Viegas, B. M., da Silva Junior, C. A. B., Macedo, E. N., Paula, M. V. d. S., da Silva Souza, J. A., Candido, V. S., & de Sousa Cunha, E. J. (2023). Influence of Glycerol and SISAL Microfiber Contents on the Thermal and Tensile Properties of Thermoplastic Starch Composites. Polymers, 15(20), 4141. https://doi.org/10.3390/polym15204141

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