abstract
The small amount of proteins in starch-rich food industry byproducts can be an advantage to crosslink with genipin and tailor the performance of biobased films. In this work, genipin was combined with nonpurified starch recovered from industrial potato washing slurries and used for films production. Starch recovered from potato washing slurries contained 0.75% protein, 2 times higher than starch directly obtained from potato and 6 times higher than the commercial one. Starch protein-genipin networks were formed with 0.05% and 0.10% genipin, gelatinized at 75 degrees C and 95 degrees C in presence of 30% glycerol. Bluish colored films were obtained in all conditions, with the higher surface roughness (Ra, 1.22 mu m), stretchability (elongation, 31%), and hydrophobicity (water contact angle, 127 degrees) for 0.10% genipin and starch gelatinized at 75 degrees C. Therefore, starch-rich byproducts, when combined with genipin, are promising for surpassing the starch-based films hydrophilicity and mechanical fragilities while providing light barrier properties.
keywords
RING-OPENING POLYMERIZATION; POTATO-TUBER; CHITOSAN; FILMS
subject category
Chemistry, Applied; Chemistry, Organic; Polymer Science
authors
Goncalves, I; Hernandez, D; Cruz, C; Lopes, J; Barra, A; Nunes, C; da Silva, JAL; Ferreira, P; Coimbra, MA
our authors
Ana Barra
Junior Researcher
Cláudia Nunes
Assistant Researcher
Idalina José Monteiro Gonçalves
Junior Researcher
Joana Filipa Martinho Lopes
PhD Student
Paula Celeste da Silva Ferreira
Coordinating ResearcherGroups
G2 - Photonic, Electronic and Magnetic Materials
G4 - Renewable Materials and Circular Economy
Projects
CICECO - Aveiro Institute of Materials (UIDB/50011/2020)
CICECO - Aveiro Institute of Materials (UIDP/50011/2020)
Projeto de Investigação Exploratória: Paula Ferreira (IF_Paula Ferreira)
acknowledgements
Thanks are due to the University of Aveiro and FCT/MCTES for the financial support of QOPNA research Unit (FCT Ref. UIDB/50006/2020) and of CICECO-Aveiro Institute of Materials (FCT Ref. UIDB/50011/2020 & UIDP/50011/2020). The authors acknowledge to POTATOPLASTIC project (POCI-01-0247-FEDER-017938), financed by Fundo Europeu de Desenvolvimento Regional (FEDER) through Programa Operacional Tem ' atico Competitividade e Internacionalizac ~ao (POCI), Isolago -Industria de Pl ' asticos, S.A., the project leader, and to A Saloinha, Lda. for providing potato byproducts. The costs resulting from the FCT hiring is funded by national funds (OE), through FCT -Fundac ~ao para a Ci <^>encia e a Tecnologia, I.P., in the scope of the framework contract foreseen in the numbers 4, 5 and 6 of the article 23, of the DecreeLaw 57/2016, of August 29, changed by Law 57/2017, of July 19. FCT is also thanked for the Investigator FCT program (PF, IF/00300/2015), Individual Call to Scientific Employment Stimulus (IG, CEECIND/00430/2017), and the grants ref. SFRH/BPD/104712/2014 (IG) and SFRH/BPD/100627/2014 (CN).