Various corona treated biopolymer substrates for the deposition of polyelectrolyte multilayers

In the present paper the effect of the substrate type and the corona polarity were investigated. Various biopolymer substrates (poly lactic acid (PLA), PLA with chitosan and lyophilized PLA) were prepared. These substrates were charged in a positive and in a negative corona and time dependences of t...

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Bibliographic Details
Main Authors: Yovcheva, T. A., Marudova, M. G., Viraneva, A. P., Sotirov, S. I., Rusev, S. H., Bodurov, I. P., Pilicheva, B. A., Uzunova, Y. I., Exner, G. K., Grancharova, Ts. Ts, Vlaeva, I. Y.
Format: Conference Proceeding
Language:English
Subjects:
Biopolymers
Chitosan
Morphology
Multilayers
Polarity
Polyelectrolytes
Polylactic acid
Substrates
Xanthan
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Summary:In the present paper the effect of the substrate type and the corona polarity were investigated. Various biopolymer substrates (poly lactic acid (PLA), PLA with chitosan and lyophilized PLA) were prepared. These substrates were charged in a positive and in a negative corona and time dependences of the normalized surface potential were studied. After that multilayer films were formed by alternative dipping the substrates into chitosan and xanthan polyelectrolyte solutions. For this purpose 0.1% chitosan solution and 0.05% xanthan solution in acetate buffers with pH 4.5 and ionic strength 0.1 mol/l were used. The films’ morphology was investigated by FTIR and SEM methods. А comparative analysis of the experimental results was presented and the most appropriate substrate type for the irreversible binding of the chitosan/ xanthan polyelectrolytes was determined.
ISSN:0094-243X
1551-7616
DOI:10.1063/1.4944258