Hydrophobic edible films made up of tomato cutin and pectin

Autor(es)

Manrich, Anny ; Moreira, Francys K. V. ; Otoni, Caio G. ; Lorevice, Marcos V. ; Martins, Maria A. ; Mattoso, Luiz H. C.

• Tipo de documento: Artigo Científico
• Fonte: Carbohydrate Polymers; v. 164, p. 83-91, MAY 15 2017.
• Citações Web of Science: 21

Resumo

Cutin is the biopolyester that protects the extracellular layer of terrestrial plants against dehydration and environmental stresses. In this work, cutin was extracted from tomato processing waste and cast into edible films having pectin as a binding agent. The influences of cutin/pectin ratio (50/50 and 25/75), film-forming suspension pH, and casting method on phase dispersion, water resistance and affinity, and thermal and mechanical properties of films were investigated. Dynamic light scattering and scanning electron microscopy revealed that cutin phase aggregation was reduced by simply increasing pH. The 50/50 films obtained by casting neutral-pH suspensions presented uniform cutin dispersion within the pectin matrix. Consequently, these films exhibited lower water uptake and solubility than their acidic counterparts. The cutin/pectin films developed here were shown to mimic tomato peel itself with respect to mechanical strength and thermal stability. Such behavior was found to be virtually independent of pH and casting method. (C) 2017 Elsevier Ltd. All rights reserved. (AU)

• Processo FAPESP: 14/23098-9 - Estudo e otimização de biocompósitos poliméricos comestíveis formulados com resíduos do processamento de frutas e hortaliças e reforçados com fibras vegetais
• Beneficiário: Caio Gomide Otoni
• Modalidade de apoio: Bolsas no Brasil - Doutorado Direto