Cellulose Acetate Sulfate as a Lyotropic Liquid Crystalline Polyelectrolyte: Synthesis, Properties, and ApplicationReportar como inadecuado




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International Journal of Polymer ScienceVolume 2010 2010, Article ID 831658, 17 pages

Research Article

Research Institute of Physical and Chemical Problems, Belarusian State University, Leningradskaya Street, 14, 220030 Minsk, Belarus

Science Chemistry Department, Belarusian State University, Leningradskaya Street, 14, 220030 Minsk, Belarus

The Built Environment Research Institute, School of the Built Environment, University of Ulster, Newtownabbey, BT37 0QB, UK

Received 13 July 2010; Accepted 14 November 2010

Academic Editor: Robert Shanks

Copyright © 2010 D. D. Grinshpan et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The optimal conditions of cellulose acetate sulfate CAS homogeneous synthesis with the yield of 94–98 wt.% have been determined. CAS was confirmed to have an even distribution of functional groups along the polymer chain. The polymer was characterized by an exceptionally high water solubility up to 70 wt.%. The isothermal diagrams of its solubility in water-alcohol media have been obtained. CAS aqueous solutions stability, electrolytic, thermal, and viscous properties have been defined. The main hydrodynamic characteristics such as intrinsic viscosity, Huggins constant, and crossover concentration have been evaluated. The parameters of polymer chain thermodynamic rigidity have been calculated. The formation of liquid crystalline structures in concentrated CAS solutions has been confirmed. CAS was recommended to be used as a binder for the medicinal forms of activated carbon and carbon sorbent for water treatment, hydrophilic ointment foundation.





Autor: D. D. Grinshpan, T. A. Savitskaya, N. G. Tsygankova, S. E. Makarevich, S. M. Tretsiakova, and T. N. Nevar

Fuente: https://www.hindawi.com/



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