Determination of effective hydrodynamic diameters of biopolymer molecules in high-viscosity mixtures by photon-correlation spectroscopy

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• 作者：P. S. Popovetskiy ; A. I. Bulavchenko
• 刊名：Colloid Journal
• 出版年：2016
• 出版时间：March 2016
• 年：2016
• 卷：78
• 期：2
• 页码：196-203
• 全文大小：261 KB
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• 作者单位：P. S. Popovetskiy (1)
  A. I. Bulavchenko (1)
  
  1. Nikolaev Institute of Inorganic Chemistry, Siberian Branch, Russian Academy of Sciences, pr. Akademika Lavrent’eva 3, Novosibirsk, 630090, Russia
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Polymer Sciences
  Surfaces and Interfaces and Thin Films
  Russian Library of Science
  
• 出版者：MAIK Nauka/Interperiodica distributed exclusively by Springer Science+Business Media LLC.
• ISSN：1608-3067

文摘

Using model high-viscosity single-component and mixed systems based on biopolymers with different molecular sizes (poly(ethylene glycol), dextran, and polysucrose) as examples, it is shown by photon-correlation spectroscopy combined with monoand polymodal analysis that solvent viscosity should be used, when calculating the hydrodynamic diameter of molecules in single-component aqueous solutions and mixed solutions of dextran and polysucrose, which have close molecule sizes, by the Stokes–Einstein equation. For mixtures of dextran and polysucrose with polyethylene glycol, the viscosity of the medium, the role of which is played by the poly(ethylene glycol) solution, should be used.