WIT Press


Mechanical Characterisation Of Nanocellulose Composites After Structural Modification

Price

Free (open access)

Paper DOI

10.2495/HPSM160311

Volume

166

Pages

7

Page Range

335 - 341

Published

2017

Size

458 kb

Author(s)

H. Takagi, A. N. Nakagaito, K. Nishimura, T. Matsui

Abstract

Recently cellulose nanofiber has attracted researchers’ attention as a new bio-based reinforcing phase, because the mechanical property of the cellulose nanofiber seems to be excellent; for example, tensile strength and modulus are about 2 GPa and about 140 GPa. However, the mechanical properties of polymer composites reinforced by the cellulose nanofiber are markedly lower than expected. In this study, polyvinyl alcohol-based nanocellulose fiber-reinforced composites were fabricated as a model nanocomposite system. We tried to improve the mechanical properties of the cellulose nanofiber-reinforced composites by controlling the orientation of cellulose nanofiber through multiple mechanical extension treatments. In the present study, the alignment of cellulose nanofiber in polymeric matrix can be controlled by applying 10 times mechanical extensions at most. The effectiveness of this fiber alignment control has been successfully demonstrated; the tensile strength and Young’s modulus of the cellulose nanofiber-reinforced composites after the mechanical extension treatments reached almost the two-fold value as compared with those of the untreated composites.

Keywords

green composites, nanocomposites, cellulose nanofiber, fiber orientation, mechanical properties