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Polymers
Volume 14
Issue 17
10.3390/polym14173687
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Article

Evaluation of the Change in Density with the Diameter and Thermal Analysis of the Seven-Islands-Sedge Fiber

by
Lucas de Mendonça Neuba
*,
Raí Felipe Pereira Junio
,
Andressa Teixeira Souza
,
Matheus Pereira Ribeiro
,
Pedro Henrique Poubel Mendonça da Silveira
,
Thuane Teixeira da Silva
,
Artur Camposo Pereira
and
Sergio Neves Monteiro
Department of Materials Science, Military Institute of Engineering-IME, Praça General Tíburcio, 80, Urca 222290-270, RJ, Brazil
*
Author to whom correspondence should be addressed.
Polymers 2022, 14(17), 3687; https://doi.org/10.3390/polym14173687
Submission received: 2 August 2022 / Revised: 25 August 2022 / Accepted: 26 August 2022 / Published: 5 September 2022
(This article belongs to the Special Issue Natural Fibre Composites and Their Mechanical Behavior)
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Abstract

Basic properties of sedge fibers from the seven-islands-sedge plant (Cyperus malaccensis) were investigated with possible application in reinforcing composite materials. A dimensional distribution and the effect of fiber diameter on density were investigated using gas pycnometry. The Weibull method, used to statistically analyze the acquired data from the diameter intervals, indicated an inverse dependence, where the thinnest fibers had the highest density values. The morphology of the fibers was obtained through scanning electron microscopy (SEM), in which a lower presence of defects was revealed in the thinner fibers, corroborating the inverse density dependence. In addition, the sedge fiber was characterized by differential scanning calorimetry and thermogravimetric analysis, which indicate an initial thermal degradation at around 241 °C. These results revealed for the first time that thinner sedge fibers might be promising reinforcement for polymer composites with a limit in temperature application.
Keywords: seven-islands-sedge fiber; density; thermal analysis; morphology characterization seven-islands-sedge fiber; density; thermal analysis; morphology characterization

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MDPI and ACS Style

Neuba, L.d.M.; Junio, R.F.P.; Souza, A.T.; Ribeiro, M.P.; da Silveira, P.H.P.M.; da Silva, T.T.; Pereira, A.C.; Monteiro, S.N. Evaluation of the Change in Density with the Diameter and Thermal Analysis of the Seven-Islands-Sedge Fiber. Polymers 2022, 14, 3687. https://doi.org/10.3390/polym14173687

AMA Style

Neuba LdM, Junio RFP, Souza AT, Ribeiro MP, da Silveira PHPM, da Silva TT, Pereira AC, Monteiro SN. Evaluation of the Change in Density with the Diameter and Thermal Analysis of the Seven-Islands-Sedge Fiber. Polymers. 2022; 14(17):3687. https://doi.org/10.3390/polym14173687

Chicago/Turabian Style

Neuba, Lucas de Mendonça, Raí Felipe Pereira Junio, Andressa Teixeira Souza, Matheus Pereira Ribeiro, Pedro Henrique Poubel Mendonça da Silveira, Thuane Teixeira da Silva, Artur Camposo Pereira, and Sergio Neves Monteiro. 2022. "Evaluation of the Change in Density with the Diameter and Thermal Analysis of the Seven-Islands-Sedge Fiber" Polymers 14, no. 17: 3687. https://doi.org/10.3390/polym14173687

APA Style

Neuba, L. d. M., Junio, R. F. P., Souza, A. T., Ribeiro, M. P., da Silveira, P. H. P. M., da Silva, T. T., Pereira, A. C., & Monteiro, S. N. (2022). Evaluation of the Change in Density with the Diameter and Thermal Analysis of the Seven-Islands-Sedge Fiber. Polymers, 14(17), 3687. https://doi.org/10.3390/polym14173687

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