Universität zu Köln

Quester, S., Dahesh, M. and Strey, R. (2014). Microcellular foams made from gliadin. Colloid Polym. Sci., 292 (9). S. 2385 - 2390. NEW YORK: SPRINGER. ISSN 1435-1536

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Abstract

We have generated closed-cell microcellular foams from gliadin, an abundantly available wheat storage protein. The extraction procedure of gliadin from wheat gluten, which involves only the natural solvents water and ethanol, respectively, is described with emphasis on the precipitation step of gliadin which results in a fine dispersion of mostly spherical, submicron gliadin particles composed of myriad of protein molecules. A dense packing of these particles was hydrated and subjected to an atmosphere of carbon dioxide or nitrogen in a high-pressure cell at 250 bar. Subsequent heating to temperatures close to but still below 100 A degrees C followed by sudden expansion and simultaneous cooling resulted in closed-cell microcellular foam. The spherical gliadin templates along with the resulting foam have been analyzed by scanning electron microscope (SEM) pictures. The size distribution of the primary particles shows diameters peaked around 0.54 mu m, and the final foam cell size peaks around 1.2 mu m, at a porosity of about 80 %. These are the smallest foam cell sizes ever reported for gliadin. Interestingly, the cell walls of these microcellular foams are remarkably thin with thicknesses in the lower nanometer range, thus nourishing the hope to be able to reach gliadin nanofoam.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Quester, S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Dahesh, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Strey, R. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-430099
DOI:	10.1007/s00396-014-3317-6
Journal or Publication Title:	Colloid Polym. Sci.
Volume:	292
Number:	9
Page Range:	S. 2385 - 2390
Date:	2014
Publisher:	SPRINGER
Place of Publication:	NEW YORK
ISSN:	1435-1536
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language WHEAT-PROTEIN FOAMS; GLUTEN PROTEINS; TEMPERATURE; FRACTIONS; BEHAVIOR; ACID Multiple languages Chemistry, Physical; Polymer Science Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/43009