| Issue |
Renew. Energy Environ. Sustain.
Volume 10, 2025
|
|
|---|---|---|
| Article Number | 3 | |
| Number of page(s) | 15 | |
| DOI | https://doi.org/10.1051/rees/2025003 | |
| Published online | 23 December 2025 | |
Supplementary Material
Supplementary Table S1. Full list of collagen-based film samples with their compositions and codes.
Supplementary Figure S1. FTIR spectra of selected collagen-based films: (a) 601BC (control), (b) 1002_coll_3H (VAC-crosslinked), (c) 1002_Karr15_3H (VAC–carrageenan formulation), (d) 1003_5K (VAC–keratin formulation), and (e) 2704_15 (keratin-rich VAC-crosslinked film). The spectra illustrate the characteristic amide bands (Amide A, I, II, and III) and the spectral modifications associated with cross-linking, keratin incorporation, and polysaccharide reinforcement. These representative curves support the interpretation of hydrogen-bonding interactions, shifts in protein secondary structure, and changes in the fingerprint region discussed in the main text.
Access here© C.C. Kahraman et al., Published by EDP Sciences, 2025
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