STUDY OF BINDING POLYVALENT METAL IONS BY POLYMERIC LIGANDS
UDC: 678.8
DOI: -
Authors:
Mityuk Dmitry Y.
1,
Muravlev Dmitry A.1,
Shibaev Andrey V.2,
Philippova Olga E.2
1 Gubkin Russian State University of Oil and Gas2 Lomonosov Moscow State University
Keywords: polysaccharide, xanthan, viscosity, complexation, polymeric ligand
Annotation:
Investigation of the process of gel formation in dilute and semidilute solutions of xanthan was performed by rheological methods as well as by NMR spectro-scopy, scanning electron microscopy and small-angle X-ray scattering (SAXS). We estimated the average molecular weight of the polymer by the Mark-Hou-wink-Kuhn relationship and the radius of gyration of solvated macromolecules. From the concentration dependence of the dynamic viscosity of the aqueous polymer solutions the overlap concentration of polymer chains of xanthan was determined. The pH values allowing the formation of gels with optimum viscosity by cross-linking of macromolecules by chromium ions were found. The SAXS and electron microscopy results allowed estimating the structural parameters of the system before and after the binding of polyvalent ions to polymer chains.
Bibliography:
1. Мищенко И.Т. Скважинная добыча нефти. — М.: Нефть и газ, 2003. — 816 с.
2. Исследование ксантановых загустителей, применяемых в технологиях кислотного гидравлического разрыва пласта/М.А. Силин, Л.А. Магадова, В.В. Пономарева, Л.Ф. Давлетшина, М.М. Мухин//Технологии нефти и газа. — 2010. — № 2 (67). — С. 25-28.
3. Milas M., Rinaudo M., Tinland B. The Viscosity Dependence on Concentration, Molecular Weight and Shear Rate of Xanthan Solutions//Polymer Bulletin. — 1985. — № 14. — P. 157-164.
4. Корчагина Е.В. Агрегация хитозана и его производных в разбавленных водных растворах: Дис. канд. физико-математических наук. — М., 2011. — 74 с.
5. Rinaudo M., Milas M., Dung L.P. Characterization of Chitosan. Influence of Ionic Strength and Degree of Acetylation on Chain Expansion//Int. J. Biol. Macromol. — 1993. — № 15. — P. 281-285.
6. Camesano T.A, Wikinson K.J. Single molecule study of xanthan conformation using atomic force microscopy//Biomacromolecules. — 2001. — № 2. — P. 1184-1191.
7. Grosberg A.Yu., Khokhlov A.R. Statistical Physics of Macromolecules. New York, 1994. — 350 p.
8. Shibaev A.V., Tamm M.V., Molchanov V.S., Rogachev A.V., Kuklin A.I., Dormidontova E.E., Philippova O.E. How a viscoelastic solution of wormlike micelles transforms into a microemulsion upon absorbtion of hydrocarbon: new insight//Langmuir. — 2014. — V. 30(13). — P. 3705-3714.
9. Barabanova A.I., Shibaev A.V., Molchanov V.S., Philippova O.E., Khokhlov A.R. Preparation of magnetic fluids based on associated polymers. Adv. Mater. Res. — 2013. — V. 650. — P. 314-319.
Back to issue