pH-Responsive Aggregation of Amphiphilic Glyco-Homopolymer
| Autor: | Suhrit Ghosh, Krishna Dan |
|---|---|
| Rok vydání: | 2011 |
| Předmět: |
chemistry.chemical_classification
Aqueous solution Polymers and Plastics Tertiary amine Organic Chemistry Protonation Polymer Hydrogen-Ion Concentration Ion chemistry.chemical_compound chemistry Polysaccharides Amphiphile Polymer chemistry Materials Chemistry Ammonium Hydrophobic and Hydrophilic Interactions Micelles Alkyl |
| Zdroj: | Macromolecular Rapid Communications. 33:127-132 |
| ISSN: | 1022-1336 |
| DOI: | 10.1002/marc.201100645 |
| Popis: | The first example of amphiphilic glyco-homopolymers is reported and their aggregation properties as a function of solution pH are studied. Two structurally similar polymers with different hydrophobicity (C8 and C6 alkyl chains) are examined. Both polymers form micelle-type aggregates in aqueous solution. The size and micro-environment of the aggregates are found to be strongly dependent on solution pH because of the state of protonation of the tertiary amine group. At acidic pH, swollen multi-micellar aggregates are formed, presumably because of the electrostatic repulsion among the ammonium ions. At basic pH more compact particles are found, which further co-assemble to generate either garland type (C8) or fractal-aggregates (C6). |
| Databáze: | OpenAIRE |
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