Monitoring Nanostructure Dynamics and Polymerization in Glycerol Plasticized Wheat Gliadin and Glutenin Films: Relation to Mechanical Properties

Ramune Kuktaite, William R. Newson, Faiza Rasheed, Tomás S. Plivelic, Mikael S. Hedenqvist, Mikael Gällstedt, Eva Johansson

Research output: Contribution to journalArticlepeer-review

20 Citations (SciVal)

Abstract

Gliadin and glutenin proteins with 10, 20, 30 and 40% of glycerol were compression molded into films (130 °C) and evaluated for protein polymerization, β-sheet structure and nano-structural morphology. Here, for the first time we show how different amounts of glycerol impact the nano-structure and functional properties of the gliadin and glutenin films. Most polymerized protein was found in the gliadin films with 20 and 30% glycerol, and in all the glutenin films (except 10%), by RP-HPLC. A β-sheet-rich protein structure was found to be high in the 10 and 20% glycerol gliadin films, and in the 20 and 30% glycerol glutenin films by FT-IR. Glycerol content of 20, 30 and 40% impacted the nano-structural morphology of the gliadin glycerol films observed by SAXS, and to a limited extent for 10 and 20% glycerol gliadin films revealed by WAXS. No ordered nano-structure was found for the glutenin glycerol films. The 20%, 30% and 40% glycerol films were the most tunable for specific mechanical properties. For the highest stiffness and strength, the 10% glycerol protein films were the best choice.

Original languageEnglish
Pages (from-to)2998-3007
Number of pages10
JournalACS Sustainable Chemistry and Engineering
Volume4
Issue number6
DOIs
Publication statusPublished - 2016 Jun 6

Subject classification (UKÄ)

  • Polymer Chemistry
  • Chemical Engineering

Keywords

  • Glycerol content
  • Polymerization
  • Protein film
  • Protein morphology
  • SAXS
  • WAXS

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