Skip to Main content Skip to Navigation
Journal articles

Electrostatic vs. covalent bond in modified Jeffamine: effect on the phase behaviour and on the templating of mesoporous silica

Abstract : Ionic and covalent combinations of oleic acid and Jeffamine ED900, a homoditopic polyetheramine, lead to novel porogens, either ``cataniomeric'' or nonionic surfactants, bearing respectively ammonium/carboxylate ionic pairs and/or amidic bonds. The effect of the electrostatic interaction vs. the covalent bond at the molecular level is clearly evidenced by the differences in the self-assembling behaviour, in either micellar or liquid crystal domains. Organized mesoporous materials were prepared through the cooperative templating mechanism from micelles and a silica source. The optimal reaction conditions were different for the nonionic (A) and di-ionic (B) surfactants, and the resulting materials had various morphologies (rod-like vs. spheres) and pore sizes (4 vs. 14 nm). Interestingly, the hybrid surfactant exhibits a versatile behaviour regarding the silica formation, acting as either a nonionic or a di-ionic surfactant in its respectively optimal conditions, A or B. This behaviour highlights the uniqueness of dynamic micelles as a novel supramolecular tool for the design of tailored mesoporous materials and could represent a novel platform for the design of pH responsive controlled drug delivery systems.
Document type :
Journal articles
Complete list of metadata

https://hal.univ-lorraine.fr/hal-01493923
Contributor : Srsmc Ul <>
Submitted on : Wednesday, March 22, 2017 - 1:52:46 PM
Last modification on : Friday, February 26, 2021 - 3:24:02 PM

Identifiers

Collections

Citation

Nadia Canilho, Andreea Pasc, Melanie Emo, Marie-José Stebe, Jean-Luc Blin. Electrostatic vs. covalent bond in modified Jeffamine: effect on the phase behaviour and on the templating of mesoporous silica. Soft Matter, Royal Society of Chemistry, 2013, 9 (45), pp.10832-10840. ⟨10.1039/c3sm52018h⟩. ⟨hal-01493923⟩

Share

Metrics

Record views

140