Mesoporous silica templated by polyion complex micelles: A versatile approach for controlling the mesostructure

The possibility to structure silica materials using polyion complex (PIC) micelles of poly-L-lysine (PLL) and poly(ethylene oxide)-b-poly(acrylic acid) (PEO-b-PAA) as novel structure directing agents was evidenced. More importantly the potential of such polyion complexes to act as versatile systems...

Full description

Saved in:
Bibliographic Details
Published in:Microporous and mesoporous materials 2017-02, Vol.239, p.244-252
Main Authors: Houssein, Dania, Warnant, Jérôme, Molina, Emilie, Cacciaguerra, Thomas, Gérardin, Corine, Marcotte, Nathalie
Format: Article
Language:English
Subjects:
Chemical Sciences
Double-hydrophilic block copolymer
Hybrid organic-inorganic interface
Mesoporous materials
or physical chemistry
Poly-L-lyzine
Polyion complex micelles
Polyion electrostatic complexation
Theoretical and
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The possibility to structure silica materials using polyion complex (PIC) micelles of poly-L-lysine (PLL) and poly(ethylene oxide)-b-poly(acrylic acid) (PEO-b-PAA) as novel structure directing agents was evidenced. More importantly the potential of such polyion complexes to act as versatile systems allowing an easy control of the silica mesostructure was revealed, thus providing materials with adjustable physico-chemical properties. Different mesostructures (lamellar, wormlike) and morphologies (bulk, nanoparticles) were obtained by simply varying the initial composition of the reaction medium, namely the ratio between the two polymers, the amount of silica relative to the polymers and the overall mass concentration, which in turn governed the chemical composition of the obtained hybrid organic/inorganic materials. All the processing parameters-induced mesostructural variations were rationalized with respect to the chemical compositions of the resulting hybrid materials, which were discussed based on competing chemical equilibria between species responsible for the mesostructuring; the results were interpreted in terms of interfacial curvature changes. [Display omitted] •Formation of silica ordered mesophases by poly-L-lyzine based complex micelles.•Control of the material mesostructure by the synthesis medium composition.•Understanding of competitive interactions in the modulation of the mesostructure.
ISSN:1387-1811
1873-3093
DOI:10.1016/j.micromeso.2016.10.013