Skip to Main content Skip to Navigation
Journal articles

Silica-Supported Styrene-Co-Divinylbenzene Pickering Emulsion Polymerization: Tuning Surface Charge and Hydrophobicity by pH and Co-Aid Adsorption

Abstract : In this work, polymerizations of styrene (St) in the presence of divinylbenzene (DVB) as a crosslinking agent and sodium 4-vinylbenzenesulfonate (VBS) have been performed in Pickering emulsions, using silica nanoparticles (SNps) as stabilizing agents and ammonium persulfate as a hydrophilic initiator. In oil-in-water Pickering emulsions with alkaline continuous phase (pH = 9) at 1, 2, and 3 wt% DVB (relative to St), polydisperse spheroid copolymer submicronic nanoparticles were obtained. Comparatively, polymerizations performed in Pickering emulsions with acidic continuous phase (pH = 5) allowed preparing St-co-DVB microspheres with core–shell structures at 1 wt% DVB and St-co-DVB hybrid monoliths with bi-continuous morphologies at 2 and 3 wt% DVB. It is noteworthy that this work reports Pickering emulsion polymerization as a new strategy for preparing hybrid percolated scaffolds with bi-continuous porosity. The proposed mechanisms originated by pH, DVB, and VBS and the drastic impact caused on the final morphology obtained, either hybrid particles or monoliths, are discussed herein.
Complete list of metadata

https://hal-univ-pau.archives-ouvertes.fr/hal-03418825
Contributor : Sylvie Blanc Connect in order to contact the contributor
Submitted on : Monday, November 8, 2021 - 10:26:18 AM
Last modification on : Tuesday, December 7, 2021 - 12:48:05 PM

File

processes-09-01820.pdf
Publisher files allowed on an open archive

Identifiers

Collections

Citation

Benoit Fouconnier, M Aboudzadeh, Francisco López-Serrano. Silica-Supported Styrene-Co-Divinylbenzene Pickering Emulsion Polymerization: Tuning Surface Charge and Hydrophobicity by pH and Co-Aid Adsorption. Processes, MDPI, 2021, 9 (10), pp.1820. ⟨10.3390/pr9101820⟩. ⟨hal-03418825⟩

Share

Metrics

Record views

12

Files downloads

12