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Mechanical and Physical Properties of Pea Starch Edible Films in the Presence of Glycerol
Author(s) -
Saberi Bahareh,
Vuong Quan V.,
Chockchaisawasdee Suwimol,
Golding John B.,
Scarlett Christopher J.,
Stathopoulos Costas E.
Publication year - 2016
Publication title -
journal of food processing and preservation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.511
H-Index - 48
eISSN - 1745-4549
pISSN - 0145-8892
DOI - 10.1111/jfpp.12719
Subject(s) - plasticizer , starch , ultimate tensile strength , glycerol , materials science , elongation , solubility , relative humidity , food science , amylose , water content , composite material , chemical engineering , chemistry , organic chemistry , engineering , physics , geotechnical engineering , thermodynamics
The mechanical properties and moisture sorption at relative humidity (RH) range of 11–94%, water vapor permeability (WVP), solubility in water and color of the pea starch films as a function of glycerol were examined. The results showed that increasing the concentration of plasticizer resulted in improvement of the tensile strength of the films at RH <43%, the percent elongation as well as the deformation at break at RH <84%. Increasing plasticizer content and RH also resulted in films with lower Young's modulus, lower puncture force, but higher puncture deformation. Furthermore, increasing plasticizer content led to the films with more opaque appearance. Films prepared with 15 and 25% glycerol had lower WVP in comparison with unplasticized film. This study provides information regarding the advantageous or disadvantageous of possible application of pea starch films in food packaging industry. Practical Application Starch edible films have been utilized for packaging technologies and edible coatings. Pea starch has been found to produce the films with improved physical and mechanical properties in comparison with films prepared from other starches due to high amount of amylose. The development of pea starch film with improved functions affects its application. Pea starch edible films may find practical applications in the poultry, meat, seafood, fruit, vegetable, grains and candies industries.