Abstract
Conditions for obtaining water-insoluble silk fibroin in the form of films have been worked out. Using optical microscopy, a change in the surface morphology of the films was demonstrated due to a structural transition to a coarsely fragmented state as a result of the treatment of the films with methyl alcohol. The conformational transition of silk fibroin from the disordered structure of the untreated film to the β-folded structure was confirmed by the FTIR spectroscopy method. The glass-transition temperature of the native film equal to 216°C was determined by the method of differential scanning calorimetry. A study of the mechanical properties of silk fibroin films in a liquid medium showed that their strength decreases and elasticity increases by almost 15 times compared with tests of the same films in a dry state.
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This work was supported by the Russian Foundation for Basic Research, project no. 20-03-00400_a.
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Translated by V. Selikhanovich
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Nashchekina, Y.A., Konygina, V.S., Popova, E.N. et al. Preparation of Water-Insoluble Silk Fibroin Films. Study of Their Structure and Properties. Tech. Phys. 67, 297–303 (2022). https://doi.org/10.1134/S1063784222050073
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DOI: https://doi.org/10.1134/S1063784222050073