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Open AccessArticle

Hydrodynamic Parameters of Strelitzia Gum

Laboratorio de Investigación y Servicios de Química Física (LISeQF-UNSL), Instituto de Física Aplicada CONICET y FQByF-Universidad Nacional de San Luis, Ejercito de los Andes 950, ZC: 5700 San Luis, Argentina
Colloids Interfaces 2018, 2(4), 45; https://doi.org/10.3390/colloids2040045
Received: 29 August 2018 / Revised: 20 September 2018 / Accepted: 21 September 2018 / Published: 10 October 2018
The flower of Strelitzia reginae generates abundant and viscous mucilage as exudate, which is purified in periods of heating–cooling, and finally precipitated with ethanol, obtaining strelitzia gum (StrG). By means of intrinsic viscosity measurement, the viscometric molecular weight (MWv) is determined, with a value of 200,000 g/mol, as well as a hydrodynamic radius of 20 ± 1 nm and a hydration value of 445 ± 34 g/g. The size of StrG was compared against dynamic light scattering data with a value of 16 ± 2 nm and a MWDLS of 230,000 g/mol. StrG is a biopolyelectrolyte with an “a” value of 0.85, which corresponds to a flexible behavior with a great effect of volume exclusion. This statement is based on the difficulty of gum dissolution, that should be performed at 80 °C. This macromolecule is very promising and can potentially be used in several industrial applications, such as in film forming, and as a gel, thickener, and coemulsifier. View Full-Text
Keywords: strelitzia gum; intrinsic viscosity; molecular weight; hydrodynamic parameters strelitzia gum; intrinsic viscosity; molecular weight; hydrodynamic parameters
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Masuelli, M.A. Hydrodynamic Parameters of Strelitzia Gum. Colloids Interfaces 2018, 2, 45.

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