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Gluten Biopolymer and Nanoclay-Derived Structures in Wheat Gluten-Urea-Clay Composites: Relation to Barrier and Mechanical Properties

Kuktaite, Ramune; Ture, Hasan; Hedenqvist, Mikael S.; Gallstedt, Mikael and Plivelic, Tomás LU (2014) In ACS Sustainable Chemistry & Engineering 2(6). p.1439-1445
Abstract
Here, we investigated the structure of natural montmorillonite (MMT) and modified Cloisite C15A (MMT pre-intercalated with a dimethyl-dehydrogenated tallow quaternary ammonium surfactant) nanoclays in the wheat gluten-urea matrix in order to obtain a nanocomposite with improved barrier and mechanical properties. Small-angle X-ray scattering indicated that the characteristic hexagonal closed packed structure of the wheat gluten-urea matrix was not found in the CISA system and existed only in the 3 and 5 wt % MMT composites. SAXS/WAXS, TGA, and water vapor/oxygen barrier properties indicated that the dispersion of the C15A clay was somewhat better than the natural MMT clay. Confocal laser scanning microscopy showed MMT clay clusters and C15A... (More)
Here, we investigated the structure of natural montmorillonite (MMT) and modified Cloisite C15A (MMT pre-intercalated with a dimethyl-dehydrogenated tallow quaternary ammonium surfactant) nanoclays in the wheat gluten-urea matrix in order to obtain a nanocomposite with improved barrier and mechanical properties. Small-angle X-ray scattering indicated that the characteristic hexagonal closed packed structure of the wheat gluten-urea matrix was not found in the CISA system and existed only in the 3 and 5 wt % MMT composites. SAXS/WAXS, TGA, and water vapor/oxygen barrier properties indicated that the dispersion of the C15A clay was somewhat better than the natural MMT clay. Confocal laser scanning microscopy showed MMT clay clusters and C15A clay particles dispersed in the protein matrix, and these were preferentially oriented in the extrusion direction only at 5 wt % of the CIS clay. The water vapor/oxygen barrier properties were improved with the presence of clay. Independent of the clay content used, the stiffness decreased and the extensibility increased in the presence of C15A due to the surfactant induced changes on the protein. The opposite "more expected" clay effect (increasing stiffness and decreasing extensibility) was observed for the MMT composites. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Protein-based materials, Natural clay, Modified clay, Protein structure, Barrier and mechanical properties
in
ACS Sustainable Chemistry & Engineering
volume
2
issue
6
pages
1439 - 1445
publisher
The American Chemical Society
external identifiers
  • wos:000336942100011
  • scopus:84901922488
ISSN
2168-0485
DOI
10.1021/sc500017y
language
English
LU publication?
yes
id
d5e38313-eb17-454e-acbb-3b53ee28d409 (old id 4549107)
date added to LUP
2014-07-17 09:16:46
date last changed
2017-07-02 03:48:49
@article{d5e38313-eb17-454e-acbb-3b53ee28d409,
  abstract     = {Here, we investigated the structure of natural montmorillonite (MMT) and modified Cloisite C15A (MMT pre-intercalated with a dimethyl-dehydrogenated tallow quaternary ammonium surfactant) nanoclays in the wheat gluten-urea matrix in order to obtain a nanocomposite with improved barrier and mechanical properties. Small-angle X-ray scattering indicated that the characteristic hexagonal closed packed structure of the wheat gluten-urea matrix was not found in the CISA system and existed only in the 3 and 5 wt % MMT composites. SAXS/WAXS, TGA, and water vapor/oxygen barrier properties indicated that the dispersion of the C15A clay was somewhat better than the natural MMT clay. Confocal laser scanning microscopy showed MMT clay clusters and C15A clay particles dispersed in the protein matrix, and these were preferentially oriented in the extrusion direction only at 5 wt % of the CIS clay. The water vapor/oxygen barrier properties were improved with the presence of clay. Independent of the clay content used, the stiffness decreased and the extensibility increased in the presence of C15A due to the surfactant induced changes on the protein. The opposite "more expected" clay effect (increasing stiffness and decreasing extensibility) was observed for the MMT composites.},
  author       = {Kuktaite, Ramune and Ture, Hasan and Hedenqvist, Mikael S. and Gallstedt, Mikael and Plivelic, Tomás},
  issn         = {2168-0485},
  keyword      = {Protein-based materials,Natural clay,Modified clay,Protein structure,Barrier and mechanical properties},
  language     = {eng},
  number       = {6},
  pages        = {1439--1445},
  publisher    = {The American Chemical Society},
  series       = {ACS Sustainable Chemistry & Engineering},
  title        = {Gluten Biopolymer and Nanoclay-Derived Structures in Wheat Gluten-Urea-Clay Composites: Relation to Barrier and Mechanical Properties},
  url          = {http://dx.doi.org/10.1021/sc500017y},
  volume       = {2},
  year         = {2014},
}