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Two Types of Hydrophobic Aggregates in Aqueous Solutions of Chitosan and Its Hydrophobic Derivative
Abstract
The aggregation phenomena in aqueous solutions of hydrophobically modified (HM) chitosan, containing 4 mol % of n-dodecyl side chains, were studied by viscometry and fluorescence spectroscopy with pyrene as a probe. The results are compared with those for unmodified chitosan. Surprisingly, fluorescence data reveal the appearance of intermolecular hydrophobic aggregates both in chitosan and in HM chitosan. Nevertheless, these polymers exhibit quite different rheological properties: upon the formation of aggregates the viscosity of HM chitosan sharply increases, while that of unmodified chitosan raises only slightly. The aggregation models for both chitosan and its hydrophobic derivative were proposed. It was shown that in solutions of HM chitosan two types of hydrophobic domains exist: hydrophobic domains typical for different associating polymers with hydrophobic side chains and hydrophobic domains inherent to chitosan itself.
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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
PEG-grafted chitosan as an injectable thermosensitive hydrogel for sustained protein release
Bhattarai, N., Ramay, H. R., Gunn, J., Matsen, F. A., & Zhang, M. (2005) · Journal of Controlled Release · doi:10.1016/j.jconrel.2004.12.019 · Cited by 656
“The Good, the Bad and the Ugly” of Chitosans
Bellich, B., D’Agostino, I., Semeraro, S., Gamini, A., & Cesàro, A. (2016) · Marine Drugs · doi:10.3390/md14050099 · Cited by 375
Physical Gelation of Chitosan in the Presence of β-Glycerophosphate: The Effect of Temperature
Cho, J., Heuzey, M.-C., Bégin, A., & Carreau, P. J. (2005) · Biomacromolecules · doi:10.1021/bm050313s · Cited by 329
Exploring the factors affecting the solubility of chitosan in water
Sogias, I. A., Khutoryanskiy, V. V., & Williams, A. C. (2010) · Macromolecular Chemistry and Physics · doi:10.1002/macp.200900385 · Cited by 293
Metadata
- Authors
- Philippova, O. E., Volkov, E. V., Sitnikova, N. L., Khokhlov, A. R., Desbrieres, J., & Rinaudo, M.
- Venue
- Biomacromolecules
- Publisher
- American Chemical Society (ACS)
- Published
- 2001-05-17
- Volume
- 2
- Issue
- 2
- Pages
- 483-490
- ISSN
- 1525-7797 (ISSN-L)
- 1526-4602
- OpenAlex
- W2101790210
- Cited by
- 232
- References
- 0
- FWCI
- 5.35
- Type
- journal article
- Language
- en
- Open access
- closed
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- Philippova, O. E., Volkov, E. V., Sitnikova, N. L., Khokhlov, A. R., Desbrieres, J., & Rinaudo, M. (2001). Two Types of Hydrophobic Aggregates in Aqueous Solutions of Chitosan and Its Hydrophobic Derivative. Biomacromolecules. https://doi.org/10.1021/bm005649a
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