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A novel method for the preparation of starch films and coatings

Author:
Pareta, R., Edirisinghe, M.J.
Source:
Carbohydrate polymers 2006 v.63 no.3 pp. 425-431
ISSN:
0144-8617
Subject:
starch, films (materials), coatings, corn starch, thickness, physical properties, atomization, new methods, scanning electron microscopy
Abstract:
In this work, maize starch was used to demonstrate a novel method which enables the preparation of starch films and coatings with good thickness control. 5% starch in de-ionized water (w/v) was gelatinized at 120 °C for 30 min, subsequently small quantities of dispersant and ethanol were added and subjected to ultrasonic disruption to make a stable modified starch solution. Electrohydrodynamic behavior of this solution was studied and optimum conditions for film preparation were determined. The solution was then electrosprayed in the cone-jet mode and films were collected on a rotating plate. Film thickness was investigated by electron microscopy. Films of varying thickness were prepared by varying the electrospraying time and their characteristics are compared with solvent-cast films.
Agid:
691842