Skip to Main content Skip to Navigation
Journal articles

Surface Modification of colloidal Silica Particles

Abstract : Colloidal silica particles in organic solvents were grafted, using several reagents, in order to make them hydrophobic. The hydrophobicity of the beads could be easily varied. Quasielastic light scattering and transmission electron microscopy experiments showed that no aggregation occurs during the reaction when monofunctional agents are used. Elemental analysis and solid-state NMR measurements gave us the rate of surface modification of the silanol groups. We also studied the rheological behaviour of the grafted particles as a function of the volume fraction in solvents of various hydrophobicity. Hexamethyldisilazane-grafted particles display hard-sphere behaviour in polar solvents such as 2-propanol, but not in alkanes, whereas dimethyldodecylchlorosilane-grafted particles flocculated in polar solvents but could easily be dispersed in apolar solvents.
Document type :
Journal articles
Complete list of metadata

https://hal.inrae.fr/hal-02678300
Contributor : Migration Prodinra <>
Submitted on : Sunday, May 31, 2020 - 8:18:16 PM
Last modification on : Saturday, April 24, 2021 - 6:40:07 PM

Links full text

Identifiers

Citation

Celine Poncet-Legrand, Bertrand Bordes, Françoise Lafuma. Surface Modification of colloidal Silica Particles. Colloid and Polymer Science, Springer Verlag, 2001, 279, pp.114-121. ⟨10.1007/s003960000391⟩. ⟨hal-02678300⟩

Share

Metrics

Record views

40