Paper Title:
Crystallinity and Thermal Decomposition of Dialdehyde Celluloses from Bacterial Cellulose
  Abstract

A series of dialdehyde cellulose samples with varied aldehyde content were prepared by oxidation of bacterial cellulose with sodium periodate. The X-ray diffractometry profile showed that the crystallinity degree of bacterial cellulose was 66%, but that of the dialdehyde cellulose (containing 12% aldehyde ) was 56%. Thermal decomposition of these dialdehyde cellulose samples and bacterial cellulose were studied by thermogravimetry. The decomposition of bacterial cellulose in nitrogen started at 230 and rapid weight loss occurred between 300-400. The introduction of dialdehyde group to bacterial cellulose resulted in significant shifts of decomposition to lower temperature range. The decomposition of dialdehyde cellulose (12% aldehyde ) started at 180 and rapid weight loss between 200-350. The temperature of rapidest weight loss shifted from 340 of bacterial cellulose to 290 of the dialdehyde cellulose(12% aldehyde).

  Info
Periodical
Key Engineering Materials (Volumes 330-332)
Main Theme
Edited by
Xingdong Zhang, Xudong Li, Hongsong Fan, Xuanyong Liu
Pages
1289-1292
DOI
10.4028/www.scientific.net/KEM.330-332.1289
Citation
Y. H. Feng, J. C. Li, Q. Lin, X. B. Wang, Z. X. Wu, S. J. Pang, Z. L. Sun, "Crystallinity and Thermal Decomposition of Dialdehyde Celluloses from Bacterial Cellulose", Key Engineering Materials, Vols. 330-332, pp. 1289-1292, 2007
Online since
February 2007
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$32.00
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