Fragmentation of Chitosan by Acids
Fragmentation of chitosan in aqueous solution by hydrochloric acid was investigated. The kinetics of fragmentation, the number of chain scissions, and polydispersity of the fragments were followed by viscometry and size exclusion chromatography. The chemical structure and the degree of N-acetylation...
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| Format: | Article |
| Language: | English |
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Wiley
2013-01-01
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| Series: | The Scientific World Journal |
| Online Access: | http://dx.doi.org/10.1155/2013/508540 |
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| author | Mohammad Reza Kasaai Joseph Arul Gérard Charlet |
| author_facet | Mohammad Reza Kasaai Joseph Arul Gérard Charlet |
| author_sort | Mohammad Reza Kasaai |
| collection | DOAJ |
| description | Fragmentation of chitosan in aqueous solution by hydrochloric acid was investigated. The kinetics of fragmentation, the number of chain scissions, and polydispersity of the fragments were followed by viscometry and size exclusion chromatography. The chemical structure and the degree of N-acetylation (DA) of the original chitosan and its fragments were examined by 1H NMR spectroscopy and elemental analysis. The kinetic data indicates that the reaction was of first order. The results of polydispersity and the DA suggest that the selected experimental conditions (temperature and concentration of acid) were appropriate to obtain the fragments having the polydispersity and the DA similar to or slightly different from those of the original one. A procedure to estimate molecular weight of fragments as well as the number of chain scissions of the fragments under the experimental conditions was also proposed. |
| format | Article |
| id | doaj-art-4c6bf13548154418bc2d1086a012245b |
| institution | Kabale University |
| issn | 1537-744X |
| language | English |
| publishDate | 2013-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | The Scientific World Journal |
| spelling | doaj-art-4c6bf13548154418bc2d1086a012245b2025-02-03T06:44:51ZengWileyThe Scientific World Journal1537-744X2013-01-01201310.1155/2013/508540508540Fragmentation of Chitosan by AcidsMohammad Reza Kasaai0Joseph Arul1Gérard Charlet2Faculty of Agricultural Engineering, Sari Agricultural Sciences and Natural Resources University, Khazar Abad Road, Km. 9, P.O. Box 578, Sari, Mazandaran, IranDepartment of Food Science and Nutrition, Université Laval, Sainte-Foy, Quebec, QC, G1K 7P4, CanadaDepartment of Chemistry, Université Laval, Sainte-Foy, Quebec, QC, G1K 7P4, CanadaFragmentation of chitosan in aqueous solution by hydrochloric acid was investigated. The kinetics of fragmentation, the number of chain scissions, and polydispersity of the fragments were followed by viscometry and size exclusion chromatography. The chemical structure and the degree of N-acetylation (DA) of the original chitosan and its fragments were examined by 1H NMR spectroscopy and elemental analysis. The kinetic data indicates that the reaction was of first order. The results of polydispersity and the DA suggest that the selected experimental conditions (temperature and concentration of acid) were appropriate to obtain the fragments having the polydispersity and the DA similar to or slightly different from those of the original one. A procedure to estimate molecular weight of fragments as well as the number of chain scissions of the fragments under the experimental conditions was also proposed.http://dx.doi.org/10.1155/2013/508540 |
| spellingShingle | Mohammad Reza Kasaai Joseph Arul Gérard Charlet Fragmentation of Chitosan by Acids The Scientific World Journal |
| title | Fragmentation of Chitosan by Acids |
| title_full | Fragmentation of Chitosan by Acids |
| title_fullStr | Fragmentation of Chitosan by Acids |
| title_full_unstemmed | Fragmentation of Chitosan by Acids |
| title_short | Fragmentation of Chitosan by Acids |
| title_sort | fragmentation of chitosan by acids |
| url | http://dx.doi.org/10.1155/2013/508540 |
| work_keys_str_mv | AT mohammadrezakasaai fragmentationofchitosanbyacids AT josepharul fragmentationofchitosanbyacids AT gerardcharlet fragmentationofchitosanbyacids |