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Promising Mechanical, Thermal, and Ballistic Properties of Novel Epoxy Composites Reinforced with Cyperus malaccensis Sedge Fiber

Composites reinforced with natural lignocellulosic fibers (NLFs) are gaining relevance as the worldwide demand for renewable and sustainable materials increases. To develop novel natural composites with satisfactory properties, less common NLFs should also be investigated. Among these, the Cyperus m...

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Autores principales: de Mendonça Neuba, Lucas, Pereira Junio, Raí Felipe, Ribeiro, Matheus Pereira, Souza, Andressa Teixeira, de Sousa Lima, Eduardo, Garcia Filho, Fábio da Costa, Figueiredo, André Ben-Hur da Silva, Braga, Fábio de Oliveira, de Azevedo, Afonso Rangel Garcez, Monteiro, Sergio Neves
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7464109/
https://www.ncbi.nlm.nih.gov/pubmed/32784467
http://dx.doi.org/10.3390/polym12081776
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author de Mendonça Neuba, Lucas
Pereira Junio, Raí Felipe
Ribeiro, Matheus Pereira
Souza, Andressa Teixeira
de Sousa Lima, Eduardo
Garcia Filho, Fábio da Costa
Figueiredo, André Ben-Hur da Silva
Braga, Fábio de Oliveira
de Azevedo, Afonso Rangel Garcez
Monteiro, Sergio Neves
author_facet de Mendonça Neuba, Lucas
Pereira Junio, Raí Felipe
Ribeiro, Matheus Pereira
Souza, Andressa Teixeira
de Sousa Lima, Eduardo
Garcia Filho, Fábio da Costa
Figueiredo, André Ben-Hur da Silva
Braga, Fábio de Oliveira
de Azevedo, Afonso Rangel Garcez
Monteiro, Sergio Neves
author_sort de Mendonça Neuba, Lucas
collection PubMed
description Composites reinforced with natural lignocellulosic fibers (NLFs) are gaining relevance as the worldwide demand for renewable and sustainable materials increases. To develop novel natural composites with satisfactory properties, less common NLFs should also be investigated. Among these, the Cyperus malaccensis (CM), a type of sedge fiber, is already used in simple items like ropes, furniture, and paper, but has not yet been investigated as composite reinforcement for possible engineering applications. Therefore, the present work evaluated for the first time the properties of novel epoxy composites incorporated with 10, 20, and 30 vol.% of CM sedge fibers. Tensile, Izod-impact, and ballistic impact tests were performed, as well as Fourier transform infrared (FT-IR) spectroscopy and thermal analysis of the composites. Results disclosed a decrease (−55%) in tensile strengths as compared to the neat epoxy. However, the elastic modulus of the 30 vol.% sedge fiber composite increased (+127%). The total strain and absorbed ballistic energy did not show significant variation. The Izod impact energy of the 30 vol.% composite was found to be 181% higher than the values obtained for the neat epoxy as a control sample. An increase in both stiffness and toughness characterized a reinforcement effect of the sedge fiber. The thermal analysis revealed a slight decrease (−15%) in the degradation temperature of the CM sedge fiber composites compared to the neat epoxy. The glass-transition temperatures were determined to be in the range of 67 to 81 °C.
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spelling pubmed-74641092020-09-04 Promising Mechanical, Thermal, and Ballistic Properties of Novel Epoxy Composites Reinforced with Cyperus malaccensis Sedge Fiber de Mendonça Neuba, Lucas Pereira Junio, Raí Felipe Ribeiro, Matheus Pereira Souza, Andressa Teixeira de Sousa Lima, Eduardo Garcia Filho, Fábio da Costa Figueiredo, André Ben-Hur da Silva Braga, Fábio de Oliveira de Azevedo, Afonso Rangel Garcez Monteiro, Sergio Neves Polymers (Basel) Article Composites reinforced with natural lignocellulosic fibers (NLFs) are gaining relevance as the worldwide demand for renewable and sustainable materials increases. To develop novel natural composites with satisfactory properties, less common NLFs should also be investigated. Among these, the Cyperus malaccensis (CM), a type of sedge fiber, is already used in simple items like ropes, furniture, and paper, but has not yet been investigated as composite reinforcement for possible engineering applications. Therefore, the present work evaluated for the first time the properties of novel epoxy composites incorporated with 10, 20, and 30 vol.% of CM sedge fibers. Tensile, Izod-impact, and ballistic impact tests were performed, as well as Fourier transform infrared (FT-IR) spectroscopy and thermal analysis of the composites. Results disclosed a decrease (−55%) in tensile strengths as compared to the neat epoxy. However, the elastic modulus of the 30 vol.% sedge fiber composite increased (+127%). The total strain and absorbed ballistic energy did not show significant variation. The Izod impact energy of the 30 vol.% composite was found to be 181% higher than the values obtained for the neat epoxy as a control sample. An increase in both stiffness and toughness characterized a reinforcement effect of the sedge fiber. The thermal analysis revealed a slight decrease (−15%) in the degradation temperature of the CM sedge fiber composites compared to the neat epoxy. The glass-transition temperatures were determined to be in the range of 67 to 81 °C. MDPI 2020-08-08 /pmc/articles/PMC7464109/ /pubmed/32784467 http://dx.doi.org/10.3390/polym12081776 Text en © 2020 by the authors. 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 (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
de Mendonça Neuba, Lucas
Pereira Junio, Raí Felipe
Ribeiro, Matheus Pereira
Souza, Andressa Teixeira
de Sousa Lima, Eduardo
Garcia Filho, Fábio da Costa
Figueiredo, André Ben-Hur da Silva
Braga, Fábio de Oliveira
de Azevedo, Afonso Rangel Garcez
Monteiro, Sergio Neves
Promising Mechanical, Thermal, and Ballistic Properties of Novel Epoxy Composites Reinforced with Cyperus malaccensis Sedge Fiber
title Promising Mechanical, Thermal, and Ballistic Properties of Novel Epoxy Composites Reinforced with Cyperus malaccensis Sedge Fiber
title_full Promising Mechanical, Thermal, and Ballistic Properties of Novel Epoxy Composites Reinforced with Cyperus malaccensis Sedge Fiber
title_fullStr Promising Mechanical, Thermal, and Ballistic Properties of Novel Epoxy Composites Reinforced with Cyperus malaccensis Sedge Fiber
title_full_unstemmed Promising Mechanical, Thermal, and Ballistic Properties of Novel Epoxy Composites Reinforced with Cyperus malaccensis Sedge Fiber
title_short Promising Mechanical, Thermal, and Ballistic Properties of Novel Epoxy Composites Reinforced with Cyperus malaccensis Sedge Fiber
title_sort promising mechanical, thermal, and ballistic properties of novel epoxy composites reinforced with cyperus malaccensis sedge fiber
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7464109/
https://www.ncbi.nlm.nih.gov/pubmed/32784467
http://dx.doi.org/10.3390/polym12081776
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