Poly(vinylpyridine) core/poly(N-isopropylacrylamide) shell microgel particles: their characterization and the uptake and release of an anionic surfactant.
The use of microgel particles for controlled uptake and release of active species has great potential. The compatibility of microgel particles with their environment and the functionality of the particles can be achieved by modification of the core microgel through the addition of a shell. In this work, core-shell microgel particles, with a pH-responsive core (polyvinylpyridine) and a temperature-responsive shell (poly-N-isopropylacrylamide), have been prepared and characterized. The uptake and release of an anionic surfactant from the microgels has been investigated as a function of solution pH and temperature. The results indicate that electrostatic attraction between the anionic surfactant and the cationically charged core of the microgel particles is the dominant mechanism for absorption of the surfactant into the core-shell microgel particles.
Bradley
Melanie
M
School of Chemistry, University of Bristol, Bristol, BS8 1TS, United Kingdom. melanie.bradley@bristol.ac.uk
Vincent
Brian
B
D000180:Acrylic Resins / Q000737:chemistry*; D000838:Anions / Q000737:chemistry; D005782:Gels / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D010316:Particle Size; D011145:Polyvinyls / Q000737:chemistry*; D013499:Surface Properties; D013501:Surface-Active Agents / Q000737:chemistry*; D013696:Temperature
D000180:Acrylic Resins; D000838:Anions; D005782:Gels; D011145:Polyvinyls; D013501:Surface-Active Agents; C052970:poly-N-isopropylacrylamide; C019535:poly(4-vinylpyridine)