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Reaggregation of Sodium Alginate Microgel Structures After Shear-Induced Deaggregation at Filtering

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Summary

The time dependence of reaggregation of sodium alginate (SA) after following the shear-induced deaggregation of the aggregates (‘egg-box’ like microgel structures) at filtering through neutral 0.20 μm filters has been found. The aggregation of SA in solution prior to filtering was induced by addition 0.1 mM Ca2+ ions. For SA at concentration of 1mg/ml and room temperature, the reaggregation process is finished after four minutes from the end of the filtration of 3.5 cm3 of the solution with rate of filtration of 1 cm3/min. The reaggregation phenomenon is simply explained by diffusional driven processes of calcium ion – SA electrostatic interactions.

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Authors and Affiliations

  1. Institute of Physics, Faculty of Natural Sciences and Mathematics, University “Ss. Cyril and Methodius” Skopje, P.O. Box 162, 1000, Skopje, Republic of Macedonia

    Stojan J. Rendevski & Aleksandar N. Andonovski

Authors
  1. Stojan J. Rendevski
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  2. Aleksandar N. Andonovski
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Correspondence to Stojan J. Rendevski.

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Rendevski, S., Andonovski, A. Reaggregation of Sodium Alginate Microgel Structures After Shear-Induced Deaggregation at Filtering. Polym. Bull. 54, 93–100 (2005). https://doi.org/10.1007/s00289-005-0356-7

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  • DOI: https://doi.org/10.1007/s00289-005-0356-7

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