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metadata.artigo.dc.title: Impact of bleaching pine fibre on the fibre/cement interface
metadata.artigo.dc.creator: Tonoli, G. H. D.
Belgacem, M. N.
Bras, J.
Silva, M. A. Pereira da
Lahr, F. A. Rocco
Savastano Júnior, H.
metadata.artigo.dc.subject: Lignin
Cellulose fibre
Fibre surface
Cement composite
Mercury intrusion porosimetry
metadata.artigo.dc.publisher: Springer May-2012
metadata.artigo.dc.identifier.citation: TONOLI, G. H. D. et al. Impact of bleaching pine fibre on the fibre/cement interface. Journal of Materials Science, [S.l.], v. 47, n. 9, p. 4167-4177, May 2012.
metadata.artigo.dc.description.abstract: The goal of this article was to evaluate the surface characteristics of the pine fibres and its impact on the performance of fibre–cement composites. Lower polar contribution of the surface energy indicates that unbleached fibres have less hydrophilic nature than the bleached fibres. Bleaching the pulp makes the fibres less stronger, more fibrillated and permeable to liquids due to removal the amorphous lignin and its extraction from the fibre surface. Atomic force microscopy reveals these changes occurring on the fibre surface and contributes to understanding the mechanism of adhesion of the resulting fibre to cement interface. Scanning electron microscopy shows that pulp bleaching increased fibre/cement interfacial bonding, whilst unbleached fibres were less susceptible to cement precipitation into the fibre cavities (lumens) in the prepared composites. Consequently, bleached fibre-reinforced composites had lower ductility due to the high interfacial adhesion between the fibre and the cement and elevated rates of fibre mineralization.
metadata.artigo.dc.language: en_US
Appears in Collections:DCF - Artigos publicados em periódicos

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