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All-cellulose composites from unbleached hardwood kraft pulp reinforced with nanofibrillated cellulose

In the present work, nanofibrillated cellulose (NFC) from bleached eucalyptus pulp was prepared, characterized and used as reinforcement in an unbleached eucalyptus fiber matrix. First, the NFC was fabricated through TEMPO-mediated oxidation and characterized for the degree of polymerization, water retention value, cationic demand and carboxyl content. Intrinsic mechanical properties were also calculated by applying the rule of mixtures, which determines the coupling (f c) and efficiency factor (η e) of cellulose nanofibrils within the matrix. The results showed that the average intrinsic tensile strength and Young’s modulus of NFC are estimated to be 6,919 MPa and 161 GPa, respectively. After characterization, the NFC was used as reinforcement in the preparation of biocomposites in the form of paper handsheets, which were physically and mechanically analyzed. The presence of NFC induced an increase in the density of biocomposites and significant enhancement of the mechanical properties as well as an important reduction in porosity. Finally, f c and η e were determined from the mean intrinsic properties

The authors are thankful to the Spanish Ministry of Science and Innovation for the financial support given by the projects CTQ2010-21660-C03-03 and CTM2011-28506-C02-01 to develop this study

Springer Verlag

Manager: Ministerio de Ciencia e Innovación (Espanya)
Author: Alcalà Vilavella, Manel
González Tovar, Israel
Boufi, Sami
Vilaseca Morera, Fabiola
Mutjé Pujol, Pere
Date: 2013
Abstract: In the present work, nanofibrillated cellulose (NFC) from bleached eucalyptus pulp was prepared, characterized and used as reinforcement in an unbleached eucalyptus fiber matrix. First, the NFC was fabricated through TEMPO-mediated oxidation and characterized for the degree of polymerization, water retention value, cationic demand and carboxyl content. Intrinsic mechanical properties were also calculated by applying the rule of mixtures, which determines the coupling (f c) and efficiency factor (η e) of cellulose nanofibrils within the matrix. The results showed that the average intrinsic tensile strength and Young’s modulus of NFC are estimated to be 6,919 MPa and 161 GPa, respectively. After characterization, the NFC was used as reinforcement in the preparation of biocomposites in the form of paper handsheets, which were physically and mechanically analyzed. The presence of NFC induced an increase in the density of biocomposites and significant enhancement of the mechanical properties as well as an important reduction in porosity. Finally, f c and η e were determined from the mean intrinsic properties
The authors are thankful to the Spanish Ministry of Science and Innovation for the financial support given by the projects CTQ2010-21660-C03-03 and CTM2011-28506-C02-01 to develop this study
Format: application/pdf
Document access: http://hdl.handle.net/10256/11381
Language: eng
Publisher: Springer Verlag
Collection: info:eu-repo/semantics/altIdentifier/doi/10.1007/s10570-013-0085-2
info:eu-repo/semantics/altIdentifier/issn/0969-0239
info:eu-repo/semantics/altIdentifier/eissn/1572-882X
info:eu-repo/grantAgreement/MICINN//CTM2011-28506-C02-01/ES/NUEVOS BIO-MATERIALES A PARTIR DE CELULOSA MICROFIBRILADA Y CELULOSA BACTERIANA/
info:eu-repo/grantAgreement/MICINN//CTQ2010-21660-C03-03/ES/PROCESO SOSTENIBLE DE OBTENCION DE PASTAS CELULOSICAS A PARTIR DE RESIDUOS AGRICOLAS PROCEDENTES DE LA PODA DE CITRICOS Y DE TALLOS DE COLZA/
Rights: Tots els drets reservats
Subject: Fibres de cel·lulosa
Cellulose fibers
Materials nanoestructurats -- Propietats mecàniques
Nanostructured materials -- Mechanical properties
Pasta de paper
Wood-pulp
Title: All-cellulose composites from unbleached hardwood kraft pulp reinforced with nanofibrillated cellulose
Type: info:eu-repo/semantics/article
Repository: DUGiDocs

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