Properties of carboxymethyl cellulose aqueous solutions with nanoparticle additives and the related composite films |
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Authors: | A M Bochek N M Zabivalova V E Yudin I V Gofman V K Lavrent’ev B Z Volchek E N Vlasova I V Abalov N G Brusilovskaya I I Osovskaya |
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Institution: | 1.Institute of Macromolecular Compounds,Russian Academy of Sciences,St. Petersburg,Russia;2.St. Petersburg State Technological University of Plant Polymers,St. Petersburg,Russia |
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Abstract: | The rheological properties of carboxymethyl cellulose aqueous solutions containing small amounts of purified montmorillonite
and bentonite nanoparticles are studied. The viscosity of mixed solutions decreases after addition of 1 wt % nanoparticles.
X-ray diffraction analysis shows that the films contain nanoparticles in the exfoliated state. An examination of the FTIR
spectra of composite films suggests a shift in the absorption band due to Si-O groups. This phenomenon may be explained both
by a change in the permittivity of the nanoparticle environment and by the formation of hydrogen bonds between Si-O groups
and functional groups of cellulose ether. It is shown that the content of the added nanoparticles influences the mechanical
characteristics of the films prepared from the systems of interest. |
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