Gelation of aqueous pectin solutions: A dynamic light scattering study

Narayanan, J and Deotare, VW and Bandyopadhyay, R and Sood, AK (2002) Gelation of aqueous pectin solutions: A dynamic light scattering study. In: Journal of Colloid and Interface Science, 245 (2). pp. 267-273.

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Abstract

We report the dynamic light scattering study of the gelation of aqueous solutions of the biopolymer, pectin, induced by the addition of calcium chloride. The time correlation function data are analyzed under the framework of the coupling model. As the solution enters the semidilute regime where gelation sets in, the relaxation process shows a stretched exponential behavior. The stretching exponent decreases and the characteristic time of the stretched exponential diverges as the system evolves to a gel. Aqueous pectin solutions in the presence of 0.1 M NaCl show similar behavior. Thus, the molecular relaxation modes of pectin solutions can be well described by the coupling model.

Item Type:	Journal Article
Publication:	Journal of Colloid and Interface Science
Publisher:	Elsevier Science
Additional Information:	Copyright of this article belongs to Elsevier Science.
Keywords:	Molecular-Weight;Viscoelastic Properties;Anomalous Diffusion;Correlated Systems;Citrus Pectins;Phase-Space;Relaxation;Polymer;Gels;Percolation.
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	22 Jul 2009 12:08
Last Modified:	19 Sep 2010 04:59
URI:	http://eprints.iisc.ac.in/id/eprint/18012

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