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Research Paper

Nanofiber Formation in Regenerated Cellulose by Saponification of Cellulose Acetate Film

[+] Author and Article Information
Jaehwan Kim

Department of Mechanical Engineering, Creative Research Center for Electro-Active Paper Actuator, Inha University, 253 Yonghyun-Dong Nam-Ku, Incheon 402-751, South Koreajaehwan@inha.ac.kr

Yi Chen

Department of Mechanical Engineering, Creative Research Center for Electro-Active Paper Actuator, Inha University, 253 Yonghyun-Dong Nam-Ku, Incheon 402-751, South Korea

J. Nanotechnol. Eng. Med 2(1), 011005 (Feb 04, 2011) (3 pages) doi:10.1115/1.4003218 History: Received December 04, 2010; Revised December 07, 2010; Published February 04, 2011; Online February 04, 2011

This paper reports a novel process of nanofiber formation in regenerated cellulose from cellulose acetate (CA) film by saponification and stretching. Saponification of CA film was performed using sodium methoxide in methanol solution. Regeneration of cellulose during the saponification of CA was verified by taking Fourier transformation infrared spectrum. Cross-sectional images of the saponified and stretched CA film revealed an aligned nanofiber structure. The Young’s modulus and ultimate strength were enhanced approximately 630% and 450%, respectively, which might be due to the formation of multiple hydrogen bonds after sodium methoxide treatment along with the nanofiber formation. Since the saponified CA films are transparent, biodegradable, and possess high mechanical strength, they can be used as a biomaterial.

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Copyright © 2011 by American Society of Mechanical Engineers
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Figures

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Figure 1

FTIR spectra before SAP and after 1 h, 5 h, 15 h, and 30 h SAPs. The acetate peak was reduced as the SAP time increased and disappeared after 30 h.

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Figure 2

Cross-sectional FESEM images of the (a) CA film, (b) CASA film, (c) CASAST film cut along the stretching direction, and (d) CASAST film cut along the orthogonal direction

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Figure 3

FESEM image of the magnified CASAST film: magnification ratio=90,000. The diameter of cellulose nanofibers is about 30 nm.

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Figure 4

Stress-strain curves for the CA, CASA, and CASAST films

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