A novel polymeric approach based on hybrid organic-inorganic materials for the preparation of multicomponent oxides
(2005)
Files
Rullens.pdf
Restricted Access - Adobe PDF
- 6.83 MB
Details
- Authors
- Supervisors
- Abstract
- Much interest is devoted to the study of inorganic and hybrid organic-inorganic materials, because they are used in the context of many high-tech applications. In that context, multicomponent oxide materials are currently prepared from solid compounds by conventional methods like the ceramic or the so-called precursor routes. However, new highly efficient preparation routes are searched for, in order to improve the properties of the target compounds. This work deals with the development of a new preparation pathway to bulk and dispersed multicomponent oxides as well as thin films, based on the thermal treatment of hybrid inorganic-organic blends made from inorganic salts and polyzwitterionic matrices. Polymers whose structure makes them able to interact with both cationic and anionic inorganic species were first designed. For practical reasons, a system based on the radical copolymerization of diallylamine or diallylammonium monomers together with maleic acid or maleamic acids was chosen. Amphiphilic poly(ampholyte)s bearing long alkyl side chains, as well as a poly(ampholyte-electrolyte) bearing a side group efficient for cation complexation, were obtained. Then, the preparation of inorganic oxides from hybrid materials obtained by combining these polymers with inorganic compounds was undertaken. This approach was applied to transition metal molybdates and bismuth vanadates prepared by thermal treatment of suited precursors involving some of the prepared polymeric matrices. This new method is particularly adapted to prepare such phases, in the form of bulk oxides, dispersed phases and thin films. Sometimes, it exhibits advantages compared to other more conventional routes, in terms of phases stabilization for example. In particular, the gamma-Bi4V2O11 phase was stabilized under mild conditions. Because of the versatility of the method developed and implemented, this work opens wide perspectives in the context of the preparation of oxide as well as non-oxide materials.
- Affiliations
Citations
Rullens, F. (2005). A novel polymeric approach based on hybrid organic-inorganic materials for the preparation of multicomponent oxides. https://hdl.handle.net/2078.5/98451