Chen, K.; Zhu, Y.; Li, L.; Lu, Y.; Guo, X.: Recyclable Spherical Polyelectrolyte Brushes Containing Magnetic Nanoparticles in Core. Macromolecular Rapid Communications 31 (2010), p. 1440-1443
10.1002/marc.201000195
Abstract:
Spherical polyelectrolyte brushes consisting of a magnetite/polystyrene nanocomposite core and a poly(acrylic acid) brush shell were prepared by photo-emulsion polymerization. They are narrowly dispersed, superparamagnetic and redispersible after aggregating by external magnetic field, as determined by transmission electron microscopy, dynamic light scattering, thermal gravimetric analysis and a vibrating sample magnetometer. Magnetic control is thus introduced into nano-sized spherical polyelectrolyte brushes to achieve recovery and controllable delivery in applications. This approach opens up the way for cost-effective applications of spherical polyelectrolyte brushes.