The use of plants as a "green factory" to produce high strength gluten-based materials
2016 (English)In: Green Chemistry, ISSN 1463-9262, E-ISSN 1463-9270, Vol. 18, no 9, 2782-2792 p.Article in journal (Refereed) PublishedText
The aim of the present study was to develop an understanding of how wheat plants can be used as a "green factory" by the modulation of genotype (G) and environmental (E) interactions to fine-tune the structure and increase the strength of gluten based materials. Two wheat genotypes (5 + 10 and 2 + 12) were grown under four nitrogen and two temperature regimes to obtain gluten of various characteristics. Protein microstructure morphology revealed by confocal laser scanning microscopy suggested a higher polymerisation of proteins in glycerol plasticized films from the 5 + 10 compared to the 2 + 12 genotype. Also, films with the highest Young's modulus and maximum stress were obtained from the 5 + 10 genotype, which might be explained by the higher number of cysteine residues and consequently more disulphide crosslinks in this genotype compared to the 2 + 12 one. The presence of two nano-scaled morphologies, hexagonal and lamellar structures and their internal relations were found to be of relevance for formation of beta-sheets and also to be related to performance (strength) of the material. Thus, plants could be used as a "green factory", avoiding the use of chemicals, to tune the tensile properties of the materials. Structural properties such as relatively low protein aggregation, high beta-sheet content and a high hexagonal to lamellar structural ratio at the nano-scale were found to yield films with high stiffness and strength.
Place, publisher, year, edition, pages
Royal Society of Chemistry, 2016. Vol. 18, no 9, 2782-2792 p.
IdentifiersURN: urn:nbn:se:kth:diva-188752DOI: 10.1039/c5gc03111gISI: 000375291100027OAI: oai:DiVA.org:kth-188752DiVA: diva2:939648
QC 201606202016-06-202016-06-172016-06-20Bibliographically approved