Thermal extrusion of starch film with alcohol

Gilfillan, William Neil, Moghaddam, Lalehvash, Bartley, John, & Doherty, William O.S. (2015) Thermal extrusion of starch film with alcohol. Journal of Food Engineering, 170, pp. 92-99.

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A one-step thermal extrusion process has been investigated for the modification of starch with alcohol in order to improve the film properties. Unmodified starch/glycerol mixtures containing Methanol (MetOH), ethanol (EtOH) and their combinations (5, 10 and 15 wt%) were thermally extruded to produce thermoplastic. The final hot-pressed film showed increased stiffness and crystallinity, while having decreased moisture uptake due to oxidation and alcohol complexing molecular interactions. The Young’s Modulus, tensile strength and elongation at break increased by 60%, 15% and 32% respectively, for 5 wt% MetOH derived film, compared to the control. The film moisture content was reduced by up to 15 wt% for 5 wt% EtOH-derived film. Generally the crystallinity increased in the alcohol-derived films due to an increased complexing of alcohol with starch forming the VH polymorph. Fourier transform infra-red (FTIR) and proton nuclear magnetic resonance (1HNMR) spectroscopic analysis were used to discuss the molecular interactions between the starch and alcohol molecules.

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ID Code: 91733
Item Type: Journal Article
Refereed: Yes
Keywords: Alcohol, Methanol, Ethanol, Extrusion, Starch, Thermoplastic Film
DOI: 10.1016/j.jfoodeng.2015.09.023
ISSN: 0260-8774
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > Research Centres > Centre for Tropical Crops and Biocommodities
Current > Institutes > Institute for Future Environments
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Facilities: Science and Engineering Centre
Copyright Owner: Copyright 2016 Elsevier
Copyright Statement: Licensed under the Creative Commons Attribution; Non-Commercial; No-Derivatives 4.0 International. DOI: 10.1016/j.jfoodeng.2015.09.023
Deposited On: 13 Jan 2016 00:38
Last Modified: 17 Jan 2016 06:02

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