Polysaccharide structures and interactions in a lithium chloride/urea/water solvent
The molten salt hydrate, lithium chloride (LiCl)/urea/water has previously been shown to swell cellulose, but there has so far been no work done to explore its effect on other polysaccharides. In this paper we have investigated the solvent effects of LiCl/urea/water on four natural polysaccharides....
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Elsevier
2016
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| Online Access: | https://eprints.nottingham.ac.uk/34295/ |
| _version_ | 1848794818702999552 |
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| author | Winkworth-Smith, Charles G. Macnaughtan, William Foster, Tim |
| author_facet | Winkworth-Smith, Charles G. Macnaughtan, William Foster, Tim |
| author_sort | Winkworth-Smith, Charles G. |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | The molten salt hydrate, lithium chloride (LiCl)/urea/water has previously been shown to swell cellulose, but there has so far been no work done to explore its effect on other polysaccharides. In this paper we have investigated the solvent effects of LiCl/urea/water on four natural polysaccharides. Fenugreek gum and xyloglucan, which are both highly branched, were found to increase in viscosity in LiCl/urea/water relative to water, possibly due to the breakage of all intra-molecular associations whereas the viscosity of konjac glucomannan which is predominantly unbranched did not change. Locust bean gum (LBG) had a lower viscosity in LiCl/urea/water compared to water due to the disruption of aggregates. Confocal microscopy showed that fenugreek gum and LBG are able to bind to cellulose in water, however, the conformational change of fenugreek gum in these solvent conditions inhibited it from binding to cellulose in LiCl/urea/water whereas conformational change allowed xyloglucan to bind to cellulose in LiCl/urea/water whilst it was unable to bind in water. Konjac glucomannan did not bind to cellulose in either solvent system. These results provide new insights into the impact of polysaccharide fine structure on conformational change in different solvent environments. |
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| format | Article |
| id | nottingham-34295 |
| institution | University of Nottingham Malaysia Campus |
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| last_indexed | 2025-11-14T19:22:14Z |
| publishDate | 2016 |
| publisher | Elsevier |
| recordtype | eprints |
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| spelling | nottingham-342952020-05-04T17:52:24Z https://eprints.nottingham.ac.uk/34295/ Polysaccharide structures and interactions in a lithium chloride/urea/water solvent Winkworth-Smith, Charles G. Macnaughtan, William Foster, Tim The molten salt hydrate, lithium chloride (LiCl)/urea/water has previously been shown to swell cellulose, but there has so far been no work done to explore its effect on other polysaccharides. In this paper we have investigated the solvent effects of LiCl/urea/water on four natural polysaccharides. Fenugreek gum and xyloglucan, which are both highly branched, were found to increase in viscosity in LiCl/urea/water relative to water, possibly due to the breakage of all intra-molecular associations whereas the viscosity of konjac glucomannan which is predominantly unbranched did not change. Locust bean gum (LBG) had a lower viscosity in LiCl/urea/water compared to water due to the disruption of aggregates. Confocal microscopy showed that fenugreek gum and LBG are able to bind to cellulose in water, however, the conformational change of fenugreek gum in these solvent conditions inhibited it from binding to cellulose in LiCl/urea/water whereas conformational change allowed xyloglucan to bind to cellulose in LiCl/urea/water whilst it was unable to bind in water. Konjac glucomannan did not bind to cellulose in either solvent system. These results provide new insights into the impact of polysaccharide fine structure on conformational change in different solvent environments. Elsevier 2016-05-11 Article PeerReviewed Winkworth-Smith, Charles G., Macnaughtan, William and Foster, Tim (2016) Polysaccharide structures and interactions in a lithium chloride/urea/water solvent. Carbohydrate Polymers, 149 . pp. 231-241. ISSN 1879-1344 Galactomannan; konjac glucomannan; xyloglucan; cellulose; lithium chloride; urea http://www.sciencedirect.com/science/article/pii/S0144861716304799 doi:10.1016/j.carbpol.2016.04.102 doi:10.1016/j.carbpol.2016.04.102 |
| spellingShingle | Galactomannan; konjac glucomannan; xyloglucan; cellulose; lithium chloride; urea Winkworth-Smith, Charles G. Macnaughtan, William Foster, Tim Polysaccharide structures and interactions in a lithium chloride/urea/water solvent |
| title | Polysaccharide structures and interactions in a lithium chloride/urea/water solvent |
| title_full | Polysaccharide structures and interactions in a lithium chloride/urea/water solvent |
| title_fullStr | Polysaccharide structures and interactions in a lithium chloride/urea/water solvent |
| title_full_unstemmed | Polysaccharide structures and interactions in a lithium chloride/urea/water solvent |
| title_short | Polysaccharide structures and interactions in a lithium chloride/urea/water solvent |
| title_sort | polysaccharide structures and interactions in a lithium chloride/urea/water solvent |
| topic | Galactomannan; konjac glucomannan; xyloglucan; cellulose; lithium chloride; urea |
| url | https://eprints.nottingham.ac.uk/34295/ https://eprints.nottingham.ac.uk/34295/ https://eprints.nottingham.ac.uk/34295/ |