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Changes in the hierarchical protein polymer structure: Urea and temperature effects on wheat gluten films
SLU Swedish University of Agricultural Sciences, Sweden.
Lund University, Sweden.
KTH Royal Institute of Technology, Sweden.
KTH Royal Institute of Technology, Sweden.
Show others and affiliations
2012 (English)In: RSC Advances, E-ISSN 2046-2069, Vol. 2, no 31, p. 11908-11914Article in journal (Refereed) Published
Abstract [en]

Understanding bio-based protein polymer structures is important when designing new materials with desirable properties. Here the effect of urea on the wheat gluten (WG) protein structure in WG-urea films was investigated. Small-angle X-ray scattering indicated the formation of a hexagonal close-packed (HCP) hierarchical structure in the WG-urea materials. The HCP structure was influenced significantly by the urea concentration and processing conditions. The interdomain distance d I between the HCP scattering objects increased with increasing content of urea and the objects seemed to be oriented in the extrusion direction. Additionally, the effect of temperature on the HCP structure was studied and it was shown that at ≥55°C the HCP structure disappeared. Transmission electron microscopy revealed a rather denatured pattern of both HMW-glutenins and gliadins in the WG-urea films. The molecular packing of the WG protein polymer can be highly affected by an additive and the processing method used.

Place, publisher, year, edition, pages
2012. Vol. 2, no 31, p. 11908-11914
Keywords [en]
Effect of temperature, Hcp structure, Hexagonal close-packed, Hierarchical structures, Inter-domain, Molecular packings, Processing condition, Processing method, Protein polymers, Protein structures, Scattering objects, Small angle X-ray scattering, Wheat gluten, Wheat gluten films
National Category
Polymer Technologies
Identifiers
URN: urn:nbn:se:ri:diva-9716DOI: 10.1039/c2ra21812gScopus ID: 2-s2.0-84868353679OAI: oai:DiVA.org:ri-9716DiVA, id: diva2:968492
Available from: 2016-09-12 Created: 2016-09-12 Last updated: 2022-09-15Bibliographically approved

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