Abstract
In this work, gelatin extracted from chromed leather waste (CLW) was used with cornstarch and glycerol to produce polymeric films. These films were compared with commercial gelatin ones. Gelatin from CLW presented a more pronounced plasticizer behavior than commercial gelatin. It may have occurred due to its lower molar mass, due to the presence of free amino acids from the partial degradation of the protein polypeptide chain during CLW gelatin extraction, and/or due to the presence of high salts content. The high drying temperature (40 °C) made the drying process faster than the starch retrogradation process. It resulted in the reduction of films crystallinity and tensile strength, and in the increase of elongation at break. It also increased equilibrium moisture content, as indicated by water sorption isotherms. FTIR spectra indicated that the absorption bands of cornstarch and CLW gelatin films are the same ones found for films of these materials when not combined, which indicates the presence of a system with phase separation.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.