Publications Repository - Gdańsk University of Technology

Films based on fish gelatin, chitosan and blend of fish gelatin and chitosan before and after cross-linking with EDC have been characterized by FT-IR spectroscopy. The FT-IR spectrum of fish gelatin film showed the characteristic amide I, amide II and amide III bands, and the FT-IR spectrum of chitosan film confirmed that the polymer was only a partially deacetylated product, and included CH3-C=O and NH2 groups, the latter both in their free –NH2 and protonated –NH3+ form. Analysis of FT-IR spectra of twocomponent, fish gelatin–chitosan film revealed the formation not only of hydrogen bonds within and between chains of polymers, but also of electrostatic interactions between –COO- of gelatin and –NH3+ of chitosan. Modification with EDC provided cross-linking of composites of the film. New iso-peptide bonds formed between activated carboxylic acid groups of glutamic or aspartic acid residue of gelatin and amine groups of gelatin or/and chitosan.

Authors

• dr hab. inż. Hanna Staroszczyk link open in new tab ,
• Katarzyna Sztuka link open in new tab ,
• Julia Wolska,
• Anna Wojtasz-Pająk,
• prof. dr hab. inż. Ilona Kołodziejska link open in new tab