Abstract

Ten chemical additives were selected from the literature for their proposed modifying activity in protein-protein interactions. These consisted of acids, bases, reducing agents, and denaturants and were added to residual deoiled meals of Crambe abyssinica (crambe) and Brassica carinata (carinata) to modify the properties of plastics produced through hot compression molding at 130 degrees C. The films produced were examined for tensile properties, protein solubility, molecular weight distribution, and water absorption. Of the additives tested, NaOH had the greatest positive effect on tensile properties, with increases of 105% in maximum stress and 200% in strain at maximum stress for crambe and a 70% increase in strain at maximum stress for carinata. Stiffness was not increased by any of the applied additives. Changes in tensile strength and elongation for crambe and elongation for carinata were related to changes in protein solubility. Increased pH was the most successful in improving the protein aggregation and mechanical properties within the complex chemistry of residual oilseed meals.

Keywords

oilseed meal; biobased plastics; Crambe abyssinica; Brassica carinata; compression molding

Published in

Journal of Agricultural and Food Chemistry
2014, Volume: 62, number: 28, pages: 6707-6715
Publisher: AMER CHEMICAL SOC

SLU Authors

• Newson, William

  • Department of Plant Breeding, Swedish University of Agricultural Sciences
    

• Kuktaite, Ramune

  • Department of Plant Breeding, Swedish University of Agricultural Sciences
    

• Johansson, Eva

  • Department of Plant Breeding, Swedish University of Agricultural Sciences
    

UKÄ Subject classification

Other Agricultural Sciences not elsewhere specified
Other Materials Engineering


Publication identifier

DOI: https://doi.org/10.1021/jf5015928

Permanent link to this page (URI)

https://res.slu.se/id/publ/64174