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Temperature-responsive multilayered micelles formed from the complexation of PNIPAM-b-P4VP block-copolymer and PS-b-PAA core–shell micelles
- Source :
-
Polymer . May2008, Vol. 49 Issue 10, p2548-2552. 5p. - Publication Year :
- 2008
-
Abstract
- Abstract: Multilayered micelles with a polystyrene (PS) core, a swollen poly(acrylic acid) (PAA)/poly(4-vinyl pyridine) (P4VP) complex shell and a poly(4-vinyl pyridine)-block-poly(isopropyl acryl amide) (P4VP-b-PNIPAM) block-copolymer corona was synthesized by complexation between PNIPAM53-b-P4VP109 block-copolymers and the PS120-b-PAA47 diblock-copolymer core–shell micelles in ethanol due to the hydrogen bonding between the AA units and 4VP units. The surface of the micelle has been modified and a temperature sensitive block PNIPAM was introduced into the corona of the micelles. After being dialyzed against acidic water, PNIPAM corona would collapse onto the PAA/P4VP shell and the excessive P4VP shell would extend into the acidic solution to form the corona reversed micelles when the micelle aqueous solution was heated to 45°C. The whole process was performed using dynamic light scattering (DLS), static light scattering (SLS), atom force microscope (AFM) and nuclear magnetic resonance (NMR). [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 00323861
- Volume :
- 49
- Issue :
- 10
- Database :
- Academic Search Index
- Journal :
- Polymer
- Publication Type :
- Academic Journal
- Accession number :
- 31916940
- Full Text :
- https://doi.org/10.1016/j.polymer.2008.03.052