Preparation and swelling of hydrophilic magnetic microgels

Christine Ménager (1) , Olivier Sandre (2) , Jêrome Mangili (3) , Valérie Cabuil (3)

1 PHENIX - PHysicochimie des Electrolytes et Nanosystèmes InterfaciauX
2 Team 3 LCPO : Polymer Self-Assembly & Life Sciences
3 LI2C - Liquides Ioniques et Interfaces Chargées

Hydrophilic magnetic microgels were synthesized by a free-radical polymerization in inverse emulsion. Two sizes of magnetic microgels were obtained depending on the initial droplet size of the emulsion. As the polymer matrix is a hydrogel, the novelty of this paper is that the magnetic particles are incorporated from an aqueous magnetic fluid instead of an organic one. In this paper, we underline the physicochemical aspects necessary to control the proper dispersion of the magnetic particles in the polymer matrix. The size, the magnetic content and the swelling degree of micron-sized and sub-micron sized magnetic microgels are characterized.

Mots clés: microgel; magnetic fluid; hybrid particles

Domaines: Polymères

Christine Ménager, Olivier Sandre, Jêrome Mangili, Valérie Cabuil. Preparation and swelling of hydrophilic magnetic microgels. Polymer, 2004, 45 (8), pp.2475-2481. ⟨10.1016/j.polymer.2004.02.018⟩. ⟨hal-01935102⟩