Environmentally Responsive Particles: From Superhydrophobic Particle Films to Water-Dispersible Microspheres - Archive ouverte HAL
Article Dans Une Revue Langmuir Année : 2010

Environmentally Responsive Particles: From Superhydrophobic Particle Films to Water-Dispersible Microspheres

Résumé

We describe the preparation, by precipitation copolymerization, of multifunctional divinylbenzene-co-pentafluorostyrene microspheres able to produce superhydrophobic surfaces or disperse in aqueous media upon annealing either in air or water, respectively. For that purpose, an amphiphilic block copolymer, polystyrene-b-poly(acrylic acid), was introduced in the initial feed composed of divinylbenzene and 2,3,4,5,6-pentafluorostyrene. As a result, fluorinated particles were obtained in which the diblock copolymer was encapsulated during the polymerization step. Upon annealing in dry air, the particles are completely hydrophobic and form superhydrophobic surfaces. On the contrary, annealing in water induces the reorientation of the PAA groups toward the particle interface, thus the particles can be dispersed in aqueous media. In addition, the presence of carboxylic acid groups at the particle interface permits us to switch the surface charge between negative and neutral depending on the environmental pH.
Fichier non déposé

Dates et versions

hal-02170298 , version 1 (01-07-2019)

Identifiants

Citer

Juan Rodriguez-Hernandez, Alexandra Muñoz-Bonilla, Antoine Bousquet, Emmanuel Ibarboure, Eric Papon. Environmentally Responsive Particles: From Superhydrophobic Particle Films to Water-Dispersible Microspheres. Langmuir, 2010, 26 (24), pp.18617-18620. ⟨10.1021/la103963z⟩. ⟨hal-02170298⟩
62 Consultations
0 Téléchargements

Altmetric

Partager

More