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International Journal of Polymer Science
Volume 2017, Article ID 6361245, 10 pages
Research Article

Valorization of Agricultural Residues for Cellulose Nanofibrils Production and Their Use in Nanocomposite Manufacturing

1Higher Institute of Technological Studies of Ksar Hellal, Department of Textile, Ksar Hellal, Tunisia
2University of Monastir, Faculty of Sciences, UR13ES63-Research Unity of Applied Chemistry & Environment, 5000 Monastir, Tunisia
3Université Grenoble Alpes, CNRS, Grenoble INP, LGP2, 38000 Grenoble, France

Correspondence should be addressed to Ramzi Khiari; rf.oohay@0002izmar_iraihk

Received 9 March 2017; Revised 3 April 2017; Accepted 6 April 2017; Published 23 April 2017

Academic Editor: Qinglin Wu

Copyright © 2017 Ramzi Khiari. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


This paper reports the isolation of cellulose nanofibrils (CNFs) from almond stems, available as agricultural residues. The CNF suspensions were prepared by the combination of chemical and mechanical treatment: the microscopic fibres were firstly isolated by the delignification-bleaching process, followed by TEMPO-mediated oxidation to facilitate the further nanofibrillation using high-pressure homogenization process at 600 bar for 10 passes as a mechanical treatment. The ensuing CNFs were characterized by several methods, such as transmission electron microscopy (TEM), degree of fibrillation, and carboxyl content. Different nanocomposites were prepared by casting-evaporation method from the mixture of CNF suspension in the commercial acrylic latex as a matrix. The effect of CNF loading on mechanical and thermal properties of the composites was then studied. The considerable enhancement of both Young’s modulus and tensile strength was observed, which clearly indicates that the nanocomposites reinforced with the nanofibrils from Prunus amygdalus have promising mechanical properties.