Abstract
Chitosan was dissolved in water using carbonic acid gas (CO2) via preparation of the gel. The suspension of the gel became transparent and the viscosity increased by the bubbling of CO2 gas, showing that chitosan was dissolved by CO2. Cellulosic materials were easily coated with chitosan using this solution (chitosan-CO2 solution), because it is unnecessary to remove the acid usually required in the case of the coating using chitosan-acid solutions. Cotton fibers were dipped into chitosan-CO2 solution, and then dried. The degree of the chitosan coating was examined by adsorbing acidic fluorescent probe on the chitosan-coated cotton and observing it by fluorescence microscope. Chitosan-coating was also performed on paper and the degree of the coating was examined by Fourier transform infrared-attenuated total reflection (FT-IR-ATR) spectroscopy. Antimicrobiabil activity of the chitosan coated on cotton gauze to Staphylococcus aureus was examined, and effective activity was ascertained. These results showed that the chitosan-coating using chitosan-CO2 solution was hopeful to coat cellulosic materials with chitosan and render pharmacological activities to them.
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Sakai, Y., Hayano, K., Yoshioka, H. et al. Chitosan-Coating of Cellulosic Materials Using an Aqueous Chitosan-CO2 Solution. Polym J 34, 144–148 (2002). https://doi.org/10.1295/polymj.34.144
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DOI: https://doi.org/10.1295/polymj.34.144