Search

Your search keyword '"Coles, Stuart R."' showing total 32 results
Start Over Author "Coles, Stuart R." Publication Year Range Last 10 years
32 results on '"Coles, Stuart R."'

30. Biodegradation as natural fibre pre-treatment in composite manufacturing

Author

Sotenko, Maria, Coles, Stuart R., McEwen, Iain, DeCampos, Rejane, Barker, Guy, and Kirwan, Kerry

Abstract

Bacterial and fungal degradation of wheat straw has become intensively scrutinised in recent years because of the growing interest in procuring useful feedstocks and chemicals from lignocellulosic sources. Typically, after the extraction of valuable sugars and phenolics, significant quantities of solid biomass remain as waste. In this work, it has been shown that the leftover fermented wheat straw can be successfully used to reinforce epoxy resins, providing better strength properties compared to non-degraded straw. A 12% and a 22% increase in Young’s modulus and ultimate tensile strength respectively were observed for degraded wheat straw/epoxy composites compared to composites containing non-degraded straw. The improvement in mechanical strength is explained in terms of the structural and morphological transformations that occurred in the fibres during the fermentation process. The opportunity to use degraded natural fibres in the manufacturing of composites, in addition to the production of chemicals from lignocellulosic feedstocks, looks promising for improving biorefinery economics further.

Published
2017
Full Text
View/download PDF

31. Interlayer Hybridization of Virgin Carbon, Recycled Carbon and Natural Fiber Laminates.

Author

Wilson, Peter R., Ratner, Alon, Stocker, Gary, Syred, Frank, Kirwan, Kerry, and Coles, Stuart R.

Subjects
CARBON fibers, LAMINATED materials, HYBRID materials, IMPACT (Mechanics), LAMINATED glass, TRANSPORTATION industry, NATURAL fibers, PLANT hybridization
Abstract

To meet sustainability objectives in the transport sector, natural fiber (NF) and recycled carbon fiber (RCF) have been developed, although they have been typically limited to low to medium performance components. This work has considered the effect of interlayer hybridization of woven NF and non-woven RCF with woven virgin carbon fibers (VCF) on the mechanical and damping performance of hybrid laminates, produced using double bag vacuum infusion (DBVI). The mean damping ratio of the pure laminates showed a trend of NF>RCF>VCF, which was inversely proportional to their modulus. The tensile, flexural and damping properties of hybrid laminates were dominated by the outermost ply. The VCF-RCF and VCF-NF hybrid laminates showed a comparatively greater mean damping ratio. The results of this work demonstrate a method for the uptake of alternative materials with a minimal impact on the mechanical properties and improved damping performance. [ABSTRACT FROM AUTHOR]

Published
2020
Full Text
View/download PDF

32. Depositing Catalyst Layers in Polymer Electrolyte Membrane Fuel Cells: A Review

Author

Strong, Austin, Thornberry, Courtney, Beattie, Shane, Chen, Rongrong, and Coles, Stuart R.

Abstract

Fuel cell technology continues to advance and offers to be a potentially promising solution to many energy needs. Of particular interest are manufacturing techniques to improve performance and decrease overall cost. For catalyst deposition on the membrane electrode assembly (MEA), there are a number of techniques that have been used in the past decades. This paper aims to review many of these main techniques that have been published to show the wide variety of catalyst deposition methods.

Published
2015
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results