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Hybrid organic−inorganic mesostructured membranes: interfaces and organization at different length scales

Alonso, Bruno and Fayon, Franck and Massiot, Dominique and Amenitsch, Heinz and Malfatti, Luca and Kidchob, Tongjit and Costacurta, Stefano and Innocenzi, Plinio (2010) Hybrid organic−inorganic mesostructured membranes: interfaces and organization at different length scales. The Journal of Physical Chemistry. C, Vol. 114 (27), p. 11730-11740. eISSN 1932-7455. Article.

Full text not available from this repository.

DOI: 10.1021/jp101652a

Abstract

The characterization of the organization of matter at different length scales is one of the main features in the field of mesostructured materials. Here, SAXS, solid-state multinuclear (29Si, 1H) MAS NMR spectra and one-dimensional 1H spin diffusion MAS NMR experiments have been used to characterize the structure and the copolymer−siloxane interfaces of monolithic hybrid organic−inorganic membranes. The membranes were prepared by cohydrolysis of organically modified alkoxysilanes (methyltriethoxysilane (MTES) and dimethyldimethoxysilane (DMDES)) with tetraethylorthosilicate (TEOS) and using a triblock copolymer PEO-PPO-PEO as templating agent. After careful drying, a cubic Im3m mesostructure is obtained. Variations in the composition of the hybrid membrane have been found to affect the adsorption of water at the copolymer−siloxane interface as well as the spatial distribution of propylene oxide (PO), ethylene oxide (EO), and siloxane domains in the final mesostructures. In that sense, the modulation of the polarity of the interfaces by simply adjusting the nature and quantity of organically modified alkoxides seems to be a promising way for the control of the final mesostructures.

Item Type:Article
ID Code:5793
Status:Published
Refereed:Yes
Uncontrolled Keywords:Hybrid organic, mesostructured materials, hybrid membrane
Subjects:Area 09 - Ingegneria industriale e dell'informazione > ING-IND/22 Scienza e tecnologia dei materiali
Divisions:001 Università di Sassari > 01 Dipartimenti > Architettura e pianificazione > LMNT-Laboratorio di Scienza dei Materiali e NanoTecnologie
Publisher:American Chemical Society
eISSN:1932-7455
Deposited On:11 May 2011 09:16

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