Pickering Interfacial Catalysts for solvent-free biomass transformation: Physicochemical behavior of non-aqueous emulsions

Zhaoyu Fan, Astrid Tay, Marc Pera-Titus, Wen Juan Zhou, Samy Benhabbari, Xiaoshuang Feng, Guillaume Malcouronne, Laurent Bonneviot, Floryan De Campo, Limin Wang*, Jean Marc Clacens

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

23 Scopus citations

Abstract

A key challenge in biomass conversion is how to achieve valuable molecules with optimal reactivity in the presence of immiscible reactants. This issue is usually tackled using either organic solvents or surfactants to promote emulsification, making industrial processes expensive and not environmentally friendly. As an alternative, Pickering emulsions using solid particles with tailored designed surface properties can promote phase contact within intrinsically biphasic systems. Here we show that amphiphilic silica nanoparticles bearing a proper combination of alkyl and strong acidic surface groups can generate stable Pickering emulsions of the glycerol/dodecanol system in the temperature range of 35-130. °C. We also show that such particles can perform as Pickering Interfacial Catalysts for the acid-catalyzed etherification of glycerol with dodecanol at 150. °C. Our findings shed light on some key parameters governing emulsion stability and catalytic activity of Pickering interfacial catalytic systems. This understanding is critical to pave the way toward technological solutions for biomass upgrading able to promote eco-efficient reactions between immiscible organic reagents with neither use of solvents nor surfactants.

Original languageEnglish (US)
Pages (from-to)80-90
Number of pages11
JournalJournal of Colloid And Interface Science
Volume427
DOIs
StatePublished - Aug 1 2014

Keywords

  • Amphiphilic particles
  • Biomass conversion
  • Emulsion catalysis
  • Emulsion stability
  • Pickering emulsion

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Surfaces, Coatings and Films
  • Colloid and Surface Chemistry

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