title: Synthesis of thermosensitive microgels with a tunable magnetic core.
abstract: In this work, we describe a new methodology for the preparation of monodisperse and thermosensitive microgels with magnetic core. In order to produce such a material, hydrophobic magnetic Fe(3)O(4) nanoparticles were prepared by two methods: thermal decomposition and coprecipitation. The surface of these nanoparticles was modified by addition of 3-butenoic acid, and after that these nanoparticles were dispersed in water and submitted to free radical polymerization at 70 °C in the presence of N-isopropylacrylamide (NIPAM) and bisacrylamide. The result of this reaction was monodisperse microgels with a magnetic core. By varying the amount of 3-butenoic acid, it was possible to obtain hybrid microgels with different magnetic core sizes and different architectures.
authors.affiliation: Departamento de Química-Física II, Facultad de Farmacia, Universidad Complutense de Madrid, Spain.
authors.forename: Marco
authors.initials: M
authors.lastname: Laurenti
authors.forename: Pablo
authors.initials: P
authors.lastname: Guardia
authors.forename: Rafael
authors.initials: R
authors.lastname: Contreras-Cáceres
authors.forename: Jorge
authors.initials: J
authors.lastname: Pérez-Juste
authors.forename: Antonio
authors.initials: A
authors.lastname: Fernandez-Barbero
authors.forename: Enrique
authors.initials: E
authors.lastname: Lopez-Cabarcos
authors.forename: Jorge
authors.initials: J
authors.lastname: Rubio-Retama
mesh_terms: D000178:Acrylamides / Q000737:chemistry; D002087:Butyrates / Q000737:chemistry; D005782:Gels / Q000138:chemical synthesis* / Q000737:chemistry; D008280:Magnetics; D058185:Magnetite Nanoparticles / Q000737:chemistry*; D010316:Particle Size; D013499:Surface Properties; D013696:Temperature
chemical_list: D000178:Acrylamides; D002087:Butyrates; D005782:Gels; D058185:Magnetite Nanoparticles; C479121:3-butenoic acid; C067295:N-isopropylacrylamide