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Porosity Assessment for Different Diameters of Coir Lignocellulosic Fibers

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Abstract

The application of natural lignocellulosic fibers (LCFs) in engineering composites has increased interest in their properties and structural characteristics. In particular, the inherent porosity of an LCF markedly affects its density and the adhesion to polymer matrices. For the first time, both open and closed porosities of a natural LCF, for different diameter ranges, were assessed. Fibers extracted from the mesocarp of the coconut fruit were investigated by nondestructive methods of density measurements and x-ray microtomography (microCT). It was found that, for all diameter ranges, the closed porosity is significantly higher than the open porosity. The total porosity increases with diameter to around 60% for coir fibers with more than 503 μm in diameter. The amount and characteristics of these open and closed porosities were revealed by t test and Weibull statistics as well as by microCT.

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Acknowledgements

The authors of the present work wish to thank the Brazilian supporting agencies CAPES, CNPq, and FAPERJ for the funding.

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Authors and Affiliations

  1. Military Institute of Engineering - IME, Praça General Tibúrcio, 80, Praia Vermelha, Rio de Janeiro, RJ, 22290-270, Brazil

    Fernanda Santos da Luz, Sergio Neves Monteiro, Luiz Carlos da Silva & Flávio James Tommasini

  2. DEQM PUC-Rio, Rua Marquês de São Vicente, 225, Gávea, Rio de Janeiro, RJ, CEP 22451-900, Brazil

    Sidnei Paciornik

  3. Federal University of Pará – UFPA, BR 316, Km 7, No 590, Ananindeua, PA, Brazil

    Verônica Scarpini Candido

Authors
  1. Fernanda Santos da Luz
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  2. Sidnei Paciornik
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  3. Sergio Neves Monteiro
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Correspondence to Sergio Neves Monteiro.

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da Luz, F.S., Paciornik, S., Monteiro, S.N. et al. Porosity Assessment for Different Diameters of Coir Lignocellulosic Fibers. JOM 69, 2045–2051 (2017). https://doi.org/10.1007/s11837-017-2528-y

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  • DOI: https://doi.org/10.1007/s11837-017-2528-y

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