Relevance of genipin networking on rheological, physical, and mechanical properties of starch-based formulations. (15th February 2021)

• Record Type: Journal Article
• Authors: Gonçalves, Idalina; Hernández, Diana; Cruz, Cátia; Lopes, Joana; Barra, Ana; Nunes, Cláudia; da Silva, José A. Lopes; Ferreira, Paula; Coimbra, Manuel A.
• Is Part Of: Carbohydrate polymers. Volume 254(2021)
• Publication Date: 2021-02-15
• Subjects: Food byproducts -- Polysaccharide-based films -- Crosslinking -- Hydrophobicity -- Stretchability; Polysaccharides -- Periodicals; Polysaccharides -- Periodicals; Polysaccharides -- Périodiques; Electronic journals; 547.78
• DOI: 10.1016/j.carbpol.2020.117236
• Languages: English
• ISSNs: 0144-8617

Abstract

Graphical abstract: Highlights: Starch-rich food industry byproducts are used to prepare films with genipin. Starch protein-genipin networks give rise to bluish starch films. Genipin increases the surface roughness and hydrophobicity of starch films. Genipin improves the starch films stretchability. 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 non- purified 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 °C and 95 °C in presence of 30% glycerol. Bluish colored films were obtained in all conditions, with the higher surface roughness ( Ra, 1.22 μm), stretchability (elongation, 31%), and hydrophobicity (water contact angle, 127°) for 0.10% genipin and starch gelatinized at 75 °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.