NDLI: Macroporous poly(ionic liquid) and poly(acrylamide) monoliths from CO<sub>2</sub>-in-water emulsion templates stabilized by sugar-based surfactants

Content Provider	Royal Society of Chemistry (RSC)
Author	Jérôme, Christine Boury, Frank Boyère, Cédric Favrelle, Audrey Debuigne, Antoine Léonard, Alexandre F.
Copyright Year	2013
Abstract	Highly interconnected poly(acrylamide) (PAM) and poly(vinylimidazolium) (PVIm) porous monoliths were templated by carbon dioxide-in-water (CO2/W) high internal phase emulsions (HIPEs), a toxic-solvent free process. A range of sugar-based fluorinated surfactants prepared by chemoenzymatic synthesis were used as emulsifiers. Both the concentration and the structure of the surfactants, especially the length of their CO2-philic part and of their spacer between the sugar head and the tail, were found to strongly affect the cellular structure and morphology of the PAM polyHIPEs, i.e. the size of pores and cells. A mannose derivative bearing a chain ranging from 6 to 10 perfluorinated carbons and a long spacer emerged as the best stabilizer, leading to a porous monolith with average pores and cell sizes (about 2.6 μm and 5–10 μm, respectively) among the lowest reported for polyHIPEs produced from CO2/W emulsions. The same template then served for the preparation of the first macroporous poly(ionic liquid) (PIL) polyHIPE by using 1-vinyl-3-ethylimidazolium bromide as the monomer. Shrinkage of the final material was prevented by adjusting the divinylimidazolium crosslinker content. The resulting low density polyHIPE exhibits small spherical cells (∼5 μm) connected by numerous small pores (∼2 μm), confirming that the CO2/W HIPE templating methodology based on fluorinated glycosurfactants is a technique of choice for the preparation of macroporous PILs.
Starting Page	8479
Ending Page	8487
Page Count	9
File Format	HTM / HTML PDF
ISSN	20507488
Volume Number	1
Issue Number	29
Journal	Journal of Materials Chemistry A
DOI	10.1039/c3ta11073g
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Acrylamide Carbon Sucrose Mannose Monolith Micrometre Ionic liquid Bromide Monomer
Content Type	Text
Resource Type	Article
Subject	Chemistry Renewable Energy, Sustainability and the Environment Materials Science

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