Thermal behavior of alginic acid and its sodium salt
Article Sidebar
Main Article Content
Abstract
described using thermogravimetry (TG) and differential scanning calorimetry (DSC). TG curves in
N 2 and air, were obtained for alginic acid showed two decomposition steps attributed to loss of water
and polymer decomposition respectively. The sodium alginate decomposed in three steps. The first
attributed to water loss, followed by the formation of a carbonaceous residue and finally the Na 2 CO 3 .
DSC curves presented peaks in agreement with the TG data. In the IR alginic acid presented bands at
1730 and 1631 cm -1 , while sodium alginate presented a doublet at 1614 e 1431 cm -1 , evidencing the
presence of salified carboxyl groups.
Metrics
Article Details
This work is licensed under a Creative Commons Attribution 4.0 International License.
The corresponding author transfers the copyright of the submitted manuscript and all its versions to Eclet. Quim., after having the consent of all authors, which ceases if the manuscript is rejected or withdrawn during the review process.
When a published manuscript in EQJ is also published in other journal, it will be immediately withdrawn from EQ and the authors informed of the Editor decision.
Self-archive to institutional, thematic repositories or personal webpage is permitted just after publication. The articles published by Eclet. Quim. are licensed under the Creative Commons Attribution 4.0 International License.
References
X. Liu, L. Qian, T. Shu, Z. Tong, Polym. 44
(2003) 407.
T. A. Davis, B. Volesky, A. Mucci, Water Res.
( 2003) 4311.
C. Jeon, J. Y. Park, Y. J. Yoo, Water Res. 36
(2002) 1814.
A. Haug, B. Larsen, Acta Chem. Scand. 16
(1962) 1908.
G. O. Aspinall, The polysaccharides, Academic
Press, New York, 1983, vol. 2.
S. Oerther, E. Payan, F. Lapicque, N. Presle,
P. Hubert, S. Muller, P. Netter, Biochim. Biophys.
Acta 185 (1999) 1426.
K. Nakamura, E. Kinoshita, T. Hatakeyama,
H. Hatakeyama, Thermochim. Acta 171 (2000)
A. I. Usov, Russ. Chem. Rev. 68 (1999) 957.
A. Ikeda, A. Takemura, H. Ono, Carbohydr.
Polym. 42 (2000) 421.
T. W. Wong, L. W. Chan, S. B. Kho, P. W. S.
Heng, J. Controlled Release 84 (2002) 99.
D. F. Othmer, R. E. Kirk, Encyclopedia of
Chemical Technology, John Wiley, New York,
rd., 1980.
k. Nakamura, Y. Nishimura, H. Hatakeyama,
T. Hatakeyama, Thermochim. Acta 267 (1995)
T. Hatakeyama, H. Hatakeyama, K.
Nakamura, Thermochim. Acta 253 (1995) 137.
A. A. Said, M. M. M. Abd El-Whab, R. M.
Hassan, Thermochim. Acta 233 (1994) 13.
R. Y. M. Huang, R. Pal, G. Y. Moon, J.
Membrane Sci. 160 (1999) 101.
C. K. Yeom, K. H. Lee, J. Appl. Polym. Sci.
(1998) 209.
N. P. Chandía, B. Matsuhiro, A. E. Vásquez,
Carbohydr. Polym. 46 (2001) 81.
E. T. G. Cavalheiro, M. Ionashiro, S. T.
Brevigliere, G. Marino, G. O. Chierice, Quim.
Nova 18 (1995) 305.
W. W. Wendlandt, Thermal Methods of
Analysis, John Wiley. New York, 3rd., 1986.
A. E. Newkirk, I. Aliferis, Anal. Chem. 30
(1958) 982.