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Isolation and Characterization of Corncob Cellulose Fibers using Microwave-Assisted Chemical Treatments

  • Meng Li , Yan-Ling Cheng , Nan Fu , Dong Li EMAIL logo , Benu Adhikari and Xiao Dong Chen
Published/Copyright: June 14, 2014

Abstract

Cellulose fibers were obtained from corncob by using microwave-assisted chemical treatments (microwave-assisted alkaline pretreatment and microwave-assisted bleaching). These treatments efficiently removed the hemicellulose and lignin from the original corncob and increased the cellulose fiber content. The morphology, chemical structure, degree of crystallinity and thermal degradation characteristics of the resultant cellulose fibers were studied by using field emission scanning electron microscopy, Fourier transform infrared spectroscopy, X-ray diffraction and thermogravimetric analysis. These microwave-assisted chemical treatments decreased the diameter of the cellulose fibers from 25–125 µm to 10–20 µm. The crystallinity of the corncob cellulose fibers increased from 32.7% to 73% due to the chemical treatments. The degradation temperature of the cellulose fibers was >260°C. The cellulose fibers obtained from these treatments can be used as biocomposites in reinforced polymer manufacturing.

Acknowledgments

This research was supported by Beijing Municipal Science and Technology Commission Project (Z121100001312010), High Technology Research and Development Program of China (2011AA100802), Science and Technology Support Project of China (2013BAD10B03), and Commonwealth Guild Agricultural Scientific Research Program of China (201003077).

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Published Online: 2014-6-14
Published in Print: 2014-9-1

©2014 by De Gruyter

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