Abstract
The kinetics and mechanism of exchange of cross-linked Cu2+ and Co2+ by H+ ions in their alginate gel complexes have been investigated, conductimetrically. The rate of exchange was found to decrease in the order Co > Ni > Cu alginates. The factors affected the rate of exchange such as the ionic radii of metal ions, width of capillaries, strength of chelation and the orientation of the solvent molecules and the macromolecular chains toward the chelated metal ions were discussed. The thermodynamic parameters of exchange have been evaluated and interpreted in terms of gel stability.
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References
H. Thiele,Z. Naturforsch B. 3 (1948) 778.
Idem., Koll. Z. 136 (1954) 80.
M. Specker, M. Kuchtner andH. Z. Harthamp,Z. Anal. Chem. 33 (1954) 141.
T. Takahashi andE. Emura,Kōgyo kagaku Zasshi, Jpn 63 (1960) 1025.
T. Takahashi, Y. Ishiwatri andH. Shirai,ibid. 66 (1963) 1458.
R. M. Hassan, M. H. Wahdan andA. Hassan,Eur. Polym. J. 24 (1988) 281.
R. H. Hassan, S. A. El-Shatoury, M. A. Mousa andA. Hassan,ibid. 24 (1988) 1173.
R. M. Hassan, submitted for publication.
G. Dickel andA. Mayer,Z. Electrochem. 57 (1953) 901.
G. Dickel andL. V. Niecieki,ibid. 59 (1955) 13.
G. G. Hammes, “Investigation of Rates and Mechanisms of Reactions”, 3rd Edn (Wiley Interscience, London, 1974).
G. Glasstone, K. J. Laidler andH. Eyring, “The Theory of Rate Processes” (McGraw-Hill, New York, 1941).
A. Haugh andO. Smidsröd,Acta Chem. Scand. 19 (1965) 341.
R. M. Hassan, A. Awad andA. Hassan,J. Polym. Sci. (in press).
R. Schweiger,Org. Chem. 27 (1962) 1789.
R. M. Hassan, M. Th. Makhlouf, A. M. Summan andA. Awad,Eur. Polym. J. 25 (1989) 993.
H. Thiele andK. Hallich,Koll. Z. 151 (1957) 1.
R. M. Hassan andM. A. Abd-Alla,Acta Polym. (in press).
H. Thiele, K. Plohnke, E. Brandt andG. Moll,Koll. Z. 182 (1962) 24.
H. Thiele andG. Anderson,Koll. Z. 140 (1955) 76.
K. Plohnke, Diploma Arbert, Kiel (1960).
R. M. Hassan (submitted for publication).
S. Olav,Acta Chem. Scand. 19 (1965) 329.
R. Schweiger,Koll. Z. 196 (1964) 47.
R. M. Hassan, A. M. Summan, M. K. Hassan andS. A. El-Shatoury,Eur. Polym. J. 25 1209 (1989).
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Hassan, R.M. Alginate polyelectrolyte ionotropic gels. J Mater Sci 26, 5806–5810 (1991). https://doi.org/10.1007/BF01130118
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DOI: https://doi.org/10.1007/BF01130118