HYBRIDMAT · Novel Ordered Micro and Mesoporous Organic-Inorganic Hybrid Materials with Crystalline Structure
FP6 — Marie Curie Actions (Human Resources and Mobility)
- Duration
- 2005-06-01 → 2006-05-31
- EU contribution
- €40,000
- Participants
- 1
- Scheme
- ERG
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Results in brief
Final Activity Report Summary - HYBRIDMAT (Novel Ordered Micro and Mesoporous Organic-Inorganic Hybrid Materials with Crystalline Structure)
The main scientific objective achieved developing the present project was the preparation of ordered porous materials whose polymeric framework is composed of both inorganic and organic fragments. With this objective, bridged organosiloxane precursors were used as a silica source in the synthesis of hybrid materials to incorporate organic groups directly into the framework of the pore walls instead of grafting these organic species onto the pore wall surface. It was possible to obtain hybrid organic-inorganic zeolitic materials using different templates as structural direct agents (SDA), instead of surfactants, to synthesise microporous solids with the characteristic advantages of zeolites. Different types of microporous hybrid organic-inorganic materials with ITQ-21, MFI and BEA structures were synthesized from bridged organosiloxane precursors as silica sources. The organozeolites prepared contain the highest number of methylene and ethylene groups known up to now (9per cent wt of carbon), into their typical inorganic frameworks, while maintaining high porosity and free porous volume. This effect is very marked in the organozeolites with Beta topology. Characterisation techniques show that the type of structure finally crystallised and the crystallinity achieved are key parameters to introduce high carbon content into the zeolitic frameworks. The hybrid organic-inorganic materials synthesised, with incipient structuration level, present the conventional morphology and textural properties of zeolitic materials. The hybrid materials obtained could be highly innovative, because their ability to incorporate a large variety of bridging organic species making possible to generate new materials with interesting mechanical, electronic, optical and magnetic properties, as well as in the area related with the storage (H2) or separation (CO2) of gas, catalysis, and as hosts for nanoclusters synthesis. Definitively, these novel materials combine the structural characteristics of ordered porous silica with the chemical functionality of organic polymers.
Data: CORDIS, © European Union
Project objective
The research area is focused on the synthesis of periodic mesoporous materials whose polymeric framework is composed of both inorganic and organic fragments. The materials have a highly ordered structure with well-defined external morphologies reflecting t he symmetries of the pore arrangement structure, whose ordering is higher than that of the conventional mesoporous materials. These characteristics give to these materials a higher thermal and hydrothermal stability than that of conventional mesoporus mate rials, whose structure was formed by amorphous silica. Moreover, these novel hybrid organic-inorganic materials will show very interesting properties of hydrophobicity-hydrophilicity, which are unknown in materials with similar porous characteristics. The synthesis procedures- e.g. to polymerisation of organosilanes, containing two or more alkoxysilyl groups, in the presence of surfactant- can be applied to the synthesis of a variety of organic-inorganic hybrid mesoporous materials with a highly ordered str ucture. This ability to incorporate a variety of bridging organic and organometallic species makes possible to generate new materials with interesting chemical, catalytic, mechanical, electronic, optical and magnetic properties. On the other hand, a parall el study will be made but following a traditional methodology of hydrothermal synthesis of zeotypes, to the preparation of new hybrid organic-inorganic materials, but within the microporous range. In conclusion, the development of this type of materials is a major breakthrough in the field of porous materials, opening new opportunities for fine-tuning porous structures, surface and framework properties by judicious choices of the organic groups incorporated and the synthesis conditions employed. These prope rties may open remarkable new possibilities in catalysis, separations, and advanced materials design, as well as in fundamental studies in nanotechnology.
Original text from CORDIS.
Participants
- CONSEJO SUPERIOR DE INVESTIGACIONES CIENTIFICAS · MADRIDCoordinatorSpain
Links
Data: CORDIS, © European Union