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Highly deacetylated chitosan and its properties
Abstract
A preparative method has been established for obtaining chitosan products which have a desired degree of deacetylation of up to virtually 100%. Effective deacetylation was attained by intermitently washing the intermediate product in water two or more times during the alkali treatment. The weight average molecular weight (M̄w) of the product, which was measured by gel permeation liquid chromatography, was about 5 × 10 5 at the highest deacetylation of nearly 100%, and the degradation of the molecular chain was not so significant. Tensile strength of the wet film increased markedly with increasing degree of deacetylation, while the dry film did not show a corresponding significant increase of the tensile strength. In the infrared spectra of chitosan film new sharp bands appeared especially at the high degree of deacetylation. This was attributed to increased “crystallization” brought about by high deacetylation.
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Cited by
Chitin and chitosan polymers: Chemistry, solubility and fiber formation
Pillai, C. K. S., Paul, W., & Sharma, C. P. (2009) · Progress in Polymer Science · doi:10.1016/j.progpolymsci.2009.04.001 · Cited by 2,745
Preparation and Characterization of Chitin and Chitosan—A Review
No, H. K., & Meyers, S. P. (1995) · Journal of Aquatic Food Product Technology · doi:10.1300/j030v04n02_03 · Cited by 462
Shigemasa, Y., Matsuura, H., Sashiwa, H., & Saimoto, H. (1996) · International Journal of Biological Macromolecules · doi:10.1016/0141-8130(95)01079-3 · Cited by 438
Chitin and chitosan: origin, properties, and applications
Kumari, S., & Kishor, R. (2020) · Handbook of Chitin and Chitosan · doi:10.1016/b978-0-12-817970-3.00001-8 · Cited by 136
Synthesis and applications of chitosan mercaptanes as heavy metal retention agent
Cárdenas, G., Orlando, P., & Edelio, T. (2001) · International Journal of Biological Macromolecules · doi:10.1016/s0141-8130(00)00156-2 · Cited by 114
Metadata
- Authors
- Mima, S., Miya, M., Iwamoto, R., & Yoshikawa, S.
- Venue
- Journal of Applied Polymer Science
- Publisher
- Wiley
- Published
- 1983-06
- Volume
- 28
- Issue
- 6
- Pages
- 1909-1917
- ISSN
- 0021-8995 (ISSN-L)
- 1097-4628
- OpenAlex
- W2011760406
- Cited by
- 433
- References
- 0
- FWCI
- 2.92
- Type
- journal article
- Language
- en
- Open access
- closed
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