Acetylation, crystalline and morphological properties of structural polysaccharide from shrimp exoskeleton
| dc.contributor.author | Gbenebor, O.P. | |
| dc.contributor.author | Adeosun, S.O. | |
| dc.contributor.author | Lawal, G.I. | |
| dc.contributor.author | Olaleye, S.A. | |
| dc.date.accessioned | 2019-11-22T14:45:21Z | |
| dc.date.available | 2019-11-22T14:45:21Z | |
| dc.date.issued | 2017 | |
| dc.description | Staff publications | en_US |
| dc.description.abstract | The extraction of a structural polysaccharide, a-chitin, from shrimp exoskeleton via chemical means using hydrochloric acid (HCl) and sodium hydroxide (NaOH) has been done. Concentrations of 0.4, 0.8 and 1.2 M for both HCl and NaOH were chosen to evaluate the acetylation degree (DA), crystalline structure and morphology of the chitin. The N-acetyl groups’ content in the structural polysaccharide ranged between 65.6 and 99.4% in decreasing order of both acid and alkali concentrations combination used. The magnitude of chitin average hydrogen bond energy EH was majorly influenced by OH(6). . .OC intra and CO. . .HN intermolecular hydrogen bonds as they showed more predominance than OH(3). . .O(5) and OH. . .OC intra and intermolecular hydrogen bonds. Chitin diffraction planes, crystalline index (Crl) and crystallite size (Dhkl) were investigated by X-ray diffraction (XRD) with reflections observed on (021), (110), (130) and (013) planes. The Crl occurred between 79.4 and 87.4%, while crystallite sizes were between 0.544 and 3.64 Å for the samples. Morphological study using scanning electron microscopy with energy dispersive spectroscopy SEM/EDS showed strong calcium and oxygen peaks. This established the shrimp shell surface to be composed of calcite and trace elements such as nitrogen and silicon. The observed a-chitin rough surfaces were attributed to the low degree deacetylation recorded during alkali treatment. | en_US |
| dc.identifier.citation | Gbenebor, O.P., Adeosun, S.O., Lawal, G.I., Olaleye, S.A., (2017). Acetylation, crystalline and morphological properties of structural polysaccharide from shrimp exoskeleton. Engineering Science and Technology, an International Journal, 20:1155–1165 | en_US |
| dc.identifier.uri | https://ir.unilag.edu.ng/handle/123456789/6963 | |
| dc.language.iso | en | en_US |
| dc.publisher | Engineering Science and Technology, an International Journal | en_US |
| dc.relation.ispartofseries | Engineering Science and Technology, an International Journal;Vol.20 | |
| dc.subject | a-Chitin Acetyation | en_US |
| dc.subject | Crystalline | en_US |
| dc.subject | Index hydrogen | en_US |
| dc.subject | Research Subject Categories::TECHNOLOGY | en_US |
| dc.title | Acetylation, crystalline and morphological properties of structural polysaccharide from shrimp exoskeleton | en_US |
| dc.type | Article | en_US |