Fractionation and Characterization of Commercial Low Acyl Gellan Gum
Tatykhanova G.S. Hirvonen S.-P. Bardadym Y.V. Gizatullina N.N. Saulimbay M.A.
August 2024John Wiley and Sons Inc
Macromolecular Symposia
2024#413Issue 4
Commercial low acyl gellan (LAG) is purified by the fractional dissolution method. An aqueous solution of purified commercial LAG exhibits polyelectrolyte character due to its high molar mass and carboxylic groups in glucuronic acid fragments. The empirical Fuoss equation determines the intrinsic viscosity of purified LAG in salt-less water. Fractionation of commercial LAG is carried out by ultrasound treatment. LAG fractions are characterized by 1H NMR and FTIR spectroscopy. The intrinsic viscosities of ultrasonically treated LAG samples are measured in 0.025 m of tetramethylammonium chloride (TMACl). The molecular weights of LAG fractions are determined by the Mark–Kuhn–Houwink equation.
commercial low acyl gellan gum , Fuoss equation , intrinsic viscosity , Mark–Kuhn–Houwink equation , purification , reduced viscosity , ultrasound treatment , viscosity average molecular weights
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Satbayev University, Almaty, 050012, Kazakhstan
Institute of Polymer Materials and Technology, Almaty, 050019, Kazakhstan
Department of Chemistry, University of Helsinki, P.O. Box 55, Helsinki, FIN-00014 HY, Finland
Satbayev University
Institute of Polymer Materials and Technology
Department of Chemistry
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