Extended Search

- in all fields
- in the title
- in key words
- in the abstract
- in the bibliography
Study of binding polyvalent metal ions by polymeric ligands
Chemical sciences

Authors: Dmitry Y. MITYUK graduated from Lomonosov Moscow State University in 1978 as „Colloid Chemistry”. In 1985 he defended his thesis. He is Candidate of Chemical Sciences, docentof Department of Physical and Colloid Chemistry at Gubkin State University of Oil and Gas. Author of more than 40 scientific and educational works.E-mail: mityuk.d@gubkin.ru
Dmitry A. MURAVLEV graduated from GubkinRussian State University of Oil and Gas in 2012 as „Chemical technology of organic substances”. He is currently doing a postgraduate course of studies at Gubkin Russian State University of Oil and Gas of the Department of Physical and Colloid Chemistry of the named university Participant of more than 5 Russian and international conferences. E-mail: mit_mur@yahoo.com
Andrey V. SHIBAEV graduated from the Faculty of Physics of the Lomonosov Moscow State University in the field of physics of condensed matter in 2010. Currently he works at the chair of polymer and crystal physics of the Faculty of Physics. His scientific research is focused on surfactants and polymer gels used in the oil fracturing technology. During many years he is the member of the organizing committee of the Moscow and Russian Science Festival. E-mail: shibaev@polly.phys.msu.ru
Olga E. PHILIPPOVA graduated from Lomonosov Moscow State University in 1981 as „High molecular weight compounds”. In 1985 she defended PhD thesis, in 1999 Doctor of sciences thesis. She is Doctor of Physics and Mathematics Sciences, professor of the Chair of Polymer and Crystal Physics at Physics Department of Lomonosov Moscow State University. Author of more than 100 scientific and educational works. E-mail: phil@polly.phys.msu.ru

Abstract: 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

Index UDK: УДК 678.8

Keywords: polysaccharide, xanthan, viscosity, complexation, polymeric ligand

1. Mishchenko I.T. Skvazhinnaya dobycha nefti. M.: Neft’ i gaz, 2003, 816 p.
2. Silin M.A., Magadova L.A., Ponomareva V.V., Davletshina L.F., Mukhin M.M. Issledovanie ksantanovykh zagustiteley, primenyaemykh v tekhnologiyakh kislotnogo gidravlicheskogo razryva plasta. Tekhnologii nefti i gaza, 2010, no. 2 (67), p. 25-28 (in Russian).
3. Milas M., Rinaudo M., Tinland B. The Viscosity Dependence on Concentration, Molecular Weight and Shear Rate of Xanthan Solutions//Polymer Bulletin, 1985, no. 14, p. 157-164.
4. Korchagina E.V. Agregatsiyakhitozana i egoproizvodnykh v razbavlennykh vodnykh rastvorakh. Cand. Diss. [Aggregation of chitosan and its derivatives in dilute aqueous solutions. Cand. Diss.]. Moscow, 2011, 74 p.
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, no. 15, p. 281-285.
6. Camesano T.A., Wikinson K.J. Single molecule study of xanthan conformation using atomic force microscopy. Biomacromolecules, 2001, no. 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., Dormidonto- va E.E., Philippova O.E. How a viscoelastic solution of wormlike micelles transforms into a micro-emulsion 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.