Calcium alginate gels: formation and stability in the presence of an inert electrolyte
| Autor: | Xingwu Wang, H. Garth Spencer |
|---|---|
| Rok vydání: | 1998 |
| Předmět: |
chemistry.chemical_classification
Aqueous solution Chromatography Calcium alginate Polymers and Plastics Organic Chemistry Salt (chemistry) chemistry.chemical_element Electrolyte Calcium Polyelectrolyte chemistry.chemical_compound chemistry Ionic strength Materials Chemistry medicine Swelling medicine.symptom Nuclear chemistry |
| Zdroj: | Polymer. 39:2759-2764 |
| ISSN: | 0032-3861 |
| DOI: | 10.1016/s0032-3861(97)00597-1 |
| Popis: | The effects of a simple salt (1:1 electrolyte, KCl) on the calcium alginate gel formation and the gel stability of alginates varying in molecular weight and mannuronate/guluronate (MG) ratio were investigated by an equilibrium dialysis technique. There was no significant dependence of the calcium binding capacity among the alginates. However, the G residues exhibited a stronger affinity for Ca2+ than M residues. The addition of a simple salt to the dialysis solution resulted in displacement of bound Ca2+ and swelling of the calcium alginate gel that increased with concentration of the simple salt. Even the Ca2+ bound with the G block was displaced by monovalent cations at high salt concentration. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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