Loading and release of small hydrophobic molecules in multilayer films based on amphiphilic polysaccharides
We report on the loading and release behaviors of polyelectrolyte multilayers based on hydrophobically modified carboxymethylpullulan (CMP) derivatives and poly(ethyleneimine) (PEI) toward hydrophobic dye. The dye-loaded films are obtained according to two different protocols: (i) the postdiffusion...
| Veröffentlicht in: | Langmuir : the ACS journal of surfaces and colloids. - 1991. - 22(2006), 5 vom: 28. Feb., Seite 2281-7 |
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| Weitere Verfasser: | , , |
| Format: | Aufsatz |
| Sprache: | English |
| Veröffentlicht: |
2006
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| Zugriff auf das übergeordnete Werk: | Langmuir : the ACS journal of surfaces and colloids |
| Schlagworte: | Journal Article Research Support, Non-U.S. Gov't Electrolytes Fluorescent Dyes Glucans Oxazines Polysaccharides carboxymethylpullulan Polyethyleneimine 9002-98-6 mehr... |
| Zusammenfassung: | We report on the loading and release behaviors of polyelectrolyte multilayers based on hydrophobically modified carboxymethylpullulan (CMP) derivatives and poly(ethyleneimine) (PEI) toward hydrophobic dye. The dye-loaded films are obtained according to two different protocols: (i) the postdiffusion approach, which involves the diffusion of the dye within preassembled self-assemblies, and (ii) the precomplexation method, which requires the formation of a water-soluble amphiphilic CMP derivative-dye complex before the multilayer buildup. In both cases, we provide clear evidence for the entrapment of the dye in hydrophobic nanoreservoirs resulting from the aggregation of decyl pendent groups grafted on CMP chains. We show that the loading capacity of the multilayers, as well as their release behavior, can be tuned by varying the grafting degree of CMP chains. Moreover, we demonstrate the possibility to trigger the subsequent release of the loaded dye molecules by varying the composition of the surrounding solution |
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| Beschreibung: | Date Completed 16.05.2007 Date Revised 15.11.2012 published: Print Citation Status MEDLINE |
| ISSN: | 0743-7463 |