Sustainable collagen-based films cross-linked with Vitex agnus-castus for enhanced water retention and thermal stabilityCemile Ceren Kahraman, Nima Pourrasoul Sardroudi, Hande Eski and Arife Candaş Adıgüzel ZenginRenew. Energy Environ. Sustain., 10 (2025) 3DOI: https://doi.org/10.1051/rees/2025003