DOI: 10.17586/2226-1494-2018-18-5-787-793


E. N. Glazacheva, D. O. Evtyukhova, M. V. Uspenskaya

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Glazacheva E.N., Evtyukhova D.O., Uspenskaya M.V. Structure research of film compositions based on chitosan/polyhydroxybutyrate blend by infrared and X-ray fluorescence spectroscopy. Scientific and Technical Journal of Information Technologies, Mechanics and Optics, 2018, vol. 18, no. 5, pp. 787–793 (in Russian). doi: 10.17586/2226-1494-2018-18-5-787-793

The paper considers the preparation of film materials based on the chitosan/polyhydroxybutyrate blend by the casting method. The combination of polysaccharide chitosan and polyester polyhydroxybutyrate gives the possibility to decrease the degradation rate and improve biomaterial mechanical characteristics. Acetic acid was used to dissolve biopolymer components. The paper presents compatibility study results for polymers in the blend composition. It was demonstrated that crystallization of polyhydroxybutyrate is suppressed by mixing with chitosan. In order to reduce the film coating solubility, we have studied the application possibility of ionic cross-linking  with the help of calcium chloride. The effect of the calcium chloride content on the structure and morphology of the surface of the film compositions was studied by infrared spectroscopy and optical microscopy. Infrared spectroscopy showed that chemical cross-linking with calcium chloride occurs with the participation of carbonyl groups of polyhydroxybutyrate and hydroxyl groups of chitosan. It has been found that addition of more than 9% calcium chloride provides optically homogeneous surface of the film composition based on the chitosan/polyhydroxybutyrate blend. The obtained polymeric compositions of chitosan/polyhydroxybutyrate/CaCl2 have high perspectives for their further application in the development of medical materials.

Keywords: chitosan, biopolymer film, polyhydroxybutyrate, calcium chloride, cross-linking agent, infrared spectroscopy, X-ray fluorescence spectroscopy

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