Heaton, T, Fisher, J and Forth, JP (2012) Waste rapeseed oil used as a binder for masonry units: NMR spectroscopic analysis. Journal of the American Oil Chemists' Society, 89 (6). pp. 1101-1111. ISSN 0003-021X
Abstract
The chemistry of unsaturated oils used as binders for masonry units is under investigation, as it is likely to be relevant to their long term properties and may be used to improve the manufacturing requirements. The mixing process is followed by heat curing for 24 h, during which time the unit gains strength. The chemistry of this process has been assumed to be a complex series of oxidative and thermal reactions due to the double bonds present in the triacylglycerol (TAG) hydrocarbon chains, producing a heterogeneous, cross-linked solid matrix which encapsulates solid aggregates. A number of model samples and binder obtained from cured blocks were analysed via several NMR techniques. The reactions are characterised by consumption of polyunsatu-rated fatty acids (PUFA) and monounsaturated fatty acids (MUFA) and formation of oxygenated compounds, chain-shortened TAG, free fatty acids (FFA), di- and monoacylglycerols (DAG and MAG) and cross-linked material. The analysis facilitates identification of specific products and mechanisms of formation as the curing progresses, and evidence for instability of particular species in the matrix from samples retrieved after 6 months of storage.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Keywords: | NMR; Non-food; Oxidation; Thermal; Waste |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Civil Engineering (Leeds) > Institute for Resilient Infrastructure (Leeds) The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Chemistry (Leeds) > Physical Chemistry (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 08 Sep 2017 09:38 |
Last Modified: | 08 Sep 2017 09:38 |
Status: | Published |
Publisher: | Springer |
Identification Number: | 10.1007/s11746-011-1984-8 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:88959 |