The effect of pectin surface density (ρs) on the engineering properties of high methoxyl (HM) pectin-based edible films was determined in order to explore the role of ρs on structure and functional properties. Films at different ρs values (2.5, 3.2, 3.8, 4.5, 5.1, 5.8 mg cm-2) were analysed by means of microscopy, thermal, mechanical and barrier (water vapour permeability WVP, oxygen permeability kPO2, carbon dioxide permeability kPCO2) properties. Microscopy, thermal and mechanical results showed that by increasing ρs from 2.5 to 5.8 mg cm-2 the film structure does not change. HM pectin-based film has a tensile strength (TS) of 20±7 MPa, and an elastic modulus (E) equal to 2400±200 MPa. However, it is quite brittle as the elongation to break (e) is close to 1%. Although the film structure was unaffected by ρs, WVP increased with the rise in ρs while kPO2 and kPCO2 decreased. On the whole, HM pectin-based film showed barrier properties comparable to biodegradable commercial film and low selectivity.
Effect of surface density on the engineering properties of high-Methoxyl Pectin-based edible Films / Giancone, T.; Torrieri, Elena; DI PIERRO, Prospero; Cavella, Silvana; Giosafatto, CONCETTA VALERIA LUCIA; Masi, Paolo. - In: FOOD AND BIOPROCESS TECHNOLOGY. - ISSN 1935-5130. - 4:7(2011), pp. 1228-1236. [10.1007/s11947-009-0208-9]
Effect of surface density on the engineering properties of high-Methoxyl Pectin-based edible Films
TORRIERI, ELENA;DI PIERRO, PROSPERO;CAVELLA, SILVANA;GIOSAFATTO, CONCETTA VALERIA LUCIA;MASI, PAOLO
2011
Abstract
The effect of pectin surface density (ρs) on the engineering properties of high methoxyl (HM) pectin-based edible films was determined in order to explore the role of ρs on structure and functional properties. Films at different ρs values (2.5, 3.2, 3.8, 4.5, 5.1, 5.8 mg cm-2) were analysed by means of microscopy, thermal, mechanical and barrier (water vapour permeability WVP, oxygen permeability kPO2, carbon dioxide permeability kPCO2) properties. Microscopy, thermal and mechanical results showed that by increasing ρs from 2.5 to 5.8 mg cm-2 the film structure does not change. HM pectin-based film has a tensile strength (TS) of 20±7 MPa, and an elastic modulus (E) equal to 2400±200 MPa. However, it is quite brittle as the elongation to break (e) is close to 1%. Although the film structure was unaffected by ρs, WVP increased with the rise in ρs while kPO2 and kPCO2 decreased. On the whole, HM pectin-based film showed barrier properties comparable to biodegradable commercial film and low selectivity.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
