Abstract
Effect of polyacrylic acid concentration on the stability of alumina suspension is studied here and interpreted on the basis of the conformation of the adsorbed polyacrylic species. The conformation of polyacrylic acid species was monitored using fluorescence technique with pyrene as probe. By allowing polyacrylic acid first to adsorb on alumina in coiled form at low pH and then raising the pH, a drastic increase in flocculation was seen at low polyacrylic concentrations, while dispersion of the slurry was observed at higher concentrations. Analysis of the slurry showed that the adsorbed polyacrylic acid underwent concentration-dependent conformational changes which affected the stability of the slurry. At low concentrations conformation of the adsorbed polyacrylic acid transformed from coiled to stretched, resulted in better bridging of the extended polymer chain between the particles, and enhanced flocculation. At higher polymer concentrations such conformational transition was absent because of crowding of the polymer chains on the particles; as a result, the suspension remained dispersed. This study shows for the first time how correlation of adsorbed polymer configuration, determined by fluorescence, with stabilization can be utilized to obtain better dispersion or flocculation of colloidal suspensions.
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References
D.H. Napper, Polymeric Stabilization of Colloidal Dispersion, Academic Press, New York (1983).
J.Th.G. Overbeek in: Surfaces and Coatings Related to Paper and Wood, Syracuse University Press, New York, (1967).
B.A. Stewart, Soil Condition, Soil Condition Sci. Soc. Of America, Madison, (1973).
E. Luck, et al. in: Ullmann’s Encyclopedia of Industrial Chemistry, All, Gerhartz Wolfgang ed., VCH Publishers, New York, (1988).
B.M. Moudgiland P. Somasundaran, Flocculation, Sedimentation and Consolidation, Proceeding of Engineering Foundation Conference, Sea Island, Georgia, USA, (1985).
J. Gregory in: Scientific Basis of Flocculation, K.J. Ives, ed., Sijthoft & Noorghoff, Rockville, MD, USA, (1978).
W.F. Linke and R.B. Booth, Trans. AIME, 217, 364–367 (1958).
Joseph 3rd Cesarano, I.A. Aksay and A. Bleier, Journal of American Ceramic Society, 71, p250 (1988).
P. Somasundaran, Y.H.C. Wang and S. Acar in: Future Trends in Polymer Science and Techlinology, ITPR, CNR, Naples, (1984).
P. Somasundaran in: 13t Int. Mineral Proc. Congress, Part A, J. Laskowski ed., Elsevier, Amsterdam, (1981).
A.F. Hollander, P. Somasundaran and C.C. Gryte in: Adsorption from Aqueous Solutions, P.H. Tewari ed, Plenum, New York, (1981).
T.W. Healy and V.K. La Mer, Journal of Physical Chem., 66, 1935, (1962).
T. Sato, and R. Ruch in: Stabilization of Colloidal Dispersions by Polymer Adsorption, Marcel Dekker. Inc. New York, (1980).
P.A. Williams et al., in: The effect of Polymer on Dispersion Properties, Th.F. Tadros ed., Academic Press, (1983).
Th.F. Tadros in: The effect of Polymer on Dispersion Properties, Th.F. Tadros ed., Academic Press, (1981).
Kuiri F. Tjipangandjara, P. Somasundaran, Y-B. Huang and N.J. Turro, accepted for publications in Colloids and Surfaces, (1989)
P. Chandar, P. Somasundaran, N.J. Turro, and K.C. Waterman, Langmuir, 3, p298, (1987).
N.J. Turro, and K.S. Arora, Polymer, 27, p783, (1986).; (b) N.J. Turro and O. Tusuneo, J. Phys. Chem., 86, p277, (1982)
Total Organic Carbon System Manual, by Rosemont Analytical, Santa Clara, California, (1988).
J.E. Gebhardt and D.W. Fuerstenau, Colloids and Surf., 7, p231, (1983).
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© 1990 Elsevier Science Publishing Co., Inc.
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Tjipangandjara, K.F., Somasundaran, P. (1990). Effects of Polyacrylic Acid Concentration on Its Conformation and on the Stability of Alumina Suspensions. In: Hanna, J., Attia, Y.A. (eds) Advances in Fine Particles Processing. Springer, Boston, MA. https://doi.org/10.1007/978-1-4684-7959-1_21
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DOI: https://doi.org/10.1007/978-1-4684-7959-1_21
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