Polyamines as new cationic plasticizers for pectin-based edible films. (20th November 2016)

• Record Type: Journal Article
• Authors: Esposito, Marilena; Di Pierro, Prospero; Regalado-Gonzales, Carlos; Mariniello, Loredana; Giosafatto, C. Valeria L.; Porta, Raffaele
• Is Part Of: Carbohydrate polymers. Volume 153(2016)
• Page Start: 222
• Page End: 228
• Publication Date: 2016-11-20
• Subjects: Pectin -- Polyamines -- Edible film -- Plasticizer; Polysaccharides -- Periodicals; Polysaccharides -- Periodicals; Polysaccharides -- Périodiques; Electronic journals; 547.78
• DOI: 10.1016/j.carbpol.2016.07.087
• Languages: English
• ISSNs: 0144-8617

Abstract

Highlights: Ca 2+ and polyamines differently influence the properties of pectin films. Ca 2+ increases tensile strength and elongation at break of glycerol containing films. Polyamines reduce film tensile strength and enhance its elongation at break. Polyamines increase film permeability to water vapor and CO2 . Polyamines are proposed as new plasticizers of pectin-based films. Abstract: Zeta potential and particle size were determined on pectin aqueous solutions as a function of pH and the effects of calcium ions, putrescine and spermidine on pectin film forming solutions and derived films were studied. Ca 2+ and polyamines were found to differently influence pectin zeta potential as well as thickness and mechanical and barrier properties of pectin films prepared at pH 7.5 either in the presence or absence of the plasticizer glycerol. In particular, Ca 2+ was found to increase film tensile strength and elongation at break only in the presence of glycerol and did not affect film thickness and permeability to both water vapor and CO2 . Conversely, increasing polyamine concentrations progressively reduced film tensile strength and markedly enhanced film thickness, elongation at break and permeability to water vapor and CO2, both in the presence and absence of glycerol. Our findings indicate that polyamines give rise to a structural organization of the heteropolysaccharide different from that determined by calcium ions, previously described as " egg box " model, and suggest their possible application as plasticizers to produce pectin-based "bioplastics" with different features.