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Proceedings Paper

Observation of creep behavior of cellulose electro-active paper (EAPap) actuator
Author(s): Joo-Hyung Kim; Sang-Woo Lee; Gyu-Young Yun; Chulho Yang; Heung Soo Kim; Jaehwan Kim
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Paper Abstract

Understanding of creep effects on actuating mechanisms is important to precisely figure out the behavior of material. Creep behaviors of cellulose based Electro-Active Paper (EAPap) were studied under different constant loading conditions. We found the structural modification of microfibrils in EAPap after creep test. Structural differences of as-prepared and after creep tested samples were compared by SEM measurements. From the measured creep behaviors by different loading conditions, two different regions of induced strain and current were clearly observed as the measurement time increased. It is consider that local defects may occur and becomes micro-dimple or micro-crack formations in lower load cases as localized deformation proceeds, while the shrinkage of diameter of elongated fibers was observed only at the high level of loading. Therefore, cellulose nanofibers may play a role to be against the creep load and prevent the localized structural deformations. The results provide useful creep behavior and mechanism to understand the mechanical behavior of thin visco-elastic EAPap actuator.

Paper Details

Date Published: 31 March 2009
PDF: 7 pages
Proc. SPIE 7289, Behavior and Mechanics of Multifunctional Materials and Composites 2009, 72891I (31 March 2009); doi: 10.1117/12.815565
Show Author Affiliations
Joo-Hyung Kim, Inha Univ. (Korea, Republic of)
Sang-Woo Lee, Inha Univ. (Korea, Republic of)
Gyu-Young Yun, Inha Univ. (Korea, Republic of)
Chulho Yang, Andong National Univ. (Korea, Republic of)
Heung Soo Kim, Catholic Univ. of Daegu (Korea, Republic of)
Jaehwan Kim, Inha Univ. (Korea, Republic of)

Published in SPIE Proceedings Vol. 7289:
Behavior and Mechanics of Multifunctional Materials and Composites 2009
Zoubeida Ounaies; Jiangyu Li, Editor(s)

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