Temperature-sensitive hybrid microgels with magnetic properties.
In the present paper, we report the preparation of hybrid temperature-sensitive microgels which include magnetite nanoparticles in their structure. Polymeric microgels have been prepared by surfactant-free emulsion copolymerization of acetoacetoxyethyl methacrylate (AAEM) and N-vinylcaprolactam (VCL) in water with a water-soluble azo-initiator. The obtained microgels possess a low critical solution temperature (LCST) in water solutions, with a rapid decrease of the particle size being observed at elevated temperatures. Magnetite was deposited directly into microgels, leading to the formation of composite particles which combine both temperature-sensitive and magnetic properties. The influence of magnetite load on microgel size, morphology, swelling-deswelling behavior, and stability is discussed.
Pich
Andrij
A
Institute of Macromolecular Chemistry and Textile Chemistry, Dresden University of Technology, D-01062 Dresden, Germany. andrij.pich@chemie.tu-dresden.de
Bhattacharya
Sanchita
S
Lu
Yan
Y
Boyko
Volodymyr
V
Adler
Hans-Juergen P
HJ
D052203:Ferrosoferric Oxide / Q000737:chemistry; D005782:Gels / Q000138:chemical synthesis / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D008280:Magnetics; D015394:Molecular Structure; D010316:Particle Size; D013696:Temperature
D005782:Gels; D052203:Ferrosoferric Oxide