دورية أكاديمية
Effects of Salt on Phase Behavior and Rheological Properties of Alginate-Chitosan Polyelectrolyte Complexes.
| العنوان: | Effects of Salt on Phase Behavior and Rheological Properties of Alginate-Chitosan Polyelectrolyte Complexes. |
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| المؤلفون: | Varadarajan A; Dave C. Swalm School of Chemical Engineering, Mississippi State University, Mississippi State, Mississippi 39762, United States., Kearney LT; Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States., Keum JK; Neutron Scattering Science Division and Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States., Naskar AK; Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States., Kundu S; Dave C. Swalm School of Chemical Engineering, Mississippi State University, Mississippi State, Mississippi 39762, United States. |
| المصدر: | Biomacromolecules [Biomacromolecules] 2023 Jun 12; Vol. 24 (6), pp. 2730-2740. Date of Electronic Publication: 2023 Jun 01. |
| نوع المنشور: | Journal Article; Research Support, U.S. Gov't, Non-P.H.S. |
| اللغة: | English |
| بيانات الدورية: | Publisher: American Chemical Society Country of Publication: United States NLM ID: 100892849 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1526-4602 (Electronic) Linking ISSN: 15257797 NLM ISO Abbreviation: Biomacromolecules Subsets: MEDLINE |
| أسماء مطبوعة: | Original Publication: Washington, DC : American Chemical Society, c2000- |
| مواضيع طبية MeSH: | Chitosan*/chemistry, Polyelectrolytes/chemistry ; Alginates/chemistry ; Sodium Chloride ; Polymers/chemistry |
| مستخلص: | Oppositely charged polyelectrolytes often form polyelectrolyte complexes (PECs) due to the association through electrostatic interactions. Obtaining PECs using natural, biocompatible polyelectrolytes is of interest in the food, pharmaceutical, and biomedical industries. In this work, PECs were prepared from two biopolymers, positively charged chitosan and negatively charged alginate. We investigate the changes in the structure and properties of PECs by adding sodium chloride (salt doping) to the system. The shear modulus of PECs can be tuned from ∼10 to 10 4 Pa by changing the salt concentration. The addition of salt led to a decrease in the water content of the complex phase with increasing shear modulus. However, at a very high salt concentration, the shear modulus of the complex phase decreased but did not lead to the liquid coacervate formation, typical of synthetic polyelectrolytes. This difference in phase behavior has likely been attributed to the hydrophobicity of chitosan and long semiflexible alginate and chitosan chains that restrict the conformational changes. Large amplitude oscillatory shear experiments captured nonlinear responses of PECs. The compositions of the PECs, determined as a function of salt concentration, signify the preferential partitioning of salt into the complex phase. Small-angle X-ray scattering of the salt-doped PECs indicates that the Kuhn length and radius of the alginate-chitosan associated structure qualitatively agree with the captured phase behavior and rheological data. This study provides insights into the structure-property as a function of salt concentration of natural polymer-based PECs necessary for developing functional materials from natural polyelectrolytes. |
| المشرفين على المادة: | 0 (Polyelectrolytes) 9012-76-4 (Chitosan) 0 (Alginates) 451W47IQ8X (Sodium Chloride) 0 (Polymers) |
| تواريخ الأحداث: | Date Created: 20230601 Date Completed: 20230613 Latest Revision: 20230613 |
| رمز التحديث: | 20231215 |
| DOI: | 10.1021/acs.biomac.3c00171 |
| PMID: | 37261758 |
| قاعدة البيانات: | MEDLINE |
Find this issue from the American Chemical Society | تدمد: | 1526-4602 |
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| DOI: | 10.1021/acs.biomac.3c00171 |