Reaggregation of sodium alginate microgel structures after shear-induced deaggregation at filtering

SummaryThe 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...

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Bibliographic Details
Published inPolymer bulletin (Berlin, Germany) Vol. 54; no. 1-2; pp. 93 - 100
Main Authors RENDEVSKI, Stojan J, ANDONOVSKI, Aleksandar N
Format Journal Article
LanguageEnglish
Published Heidelberg Springer 01.05.2005
Berlin Springer Nature B.V
New York, NY
Subjects
Applied sciences
Calcium ions
Exact sciences and technology
Filtration
Microgels
Natural polymers
Physicochemistry of polymers
Room temperature
Sodium alginate
Starch and polysaccharides
Filtration
Light scattering
Gelation
Electrostatic interaction
Uronide polymer
Alginates
Experimental study
Mechanism
Polyelectrolyte
Electric birefringence
Calcium ion
Investigation method
Optical properties
Concentration effect
Microgel
Oside polymer
Kinetics
Aqueous solution
Saline solution
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Summary:SummaryThe 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.
ISSN:0170-0839
1436-2449
DOI:10.1007/s00289-005-0356-7