Functional ceramic and nanocomposite fibers, cellular articles and microspheres via radiation curable colloidal dispersions

Autor:	Judit Heinecke, Christos G. Aneziris, Yoram de Hazan, Veronika Märkl, Thomas Graule
Rok vydání:	2011
Předmět:	Materials science Nanocomposite Polymer nanocomposite Nanoparticle chemistry.chemical_compound Colloid Monomer chemistry visual_art Materials Chemistry Ceramics and Composites visual_art.visual_art_medium UV curing Ceramic Fiber Composite material
Zdroj:	Journal of the European Ceramic Society. 31:2601-2611
ISSN:	0955-2219
DOI:	10.1016/j.jeurceramsoc.2010.12.006
Popis:	We present here new cellular ceramics, fibers and microspheres produced by novel and general microshaping techniques employing colloidal dispersions in solvent free radiation curable monomer mixtures. High loading, low viscosity dispersions of functional nanoparticles such as TiO2 and α-Fe2O3 and colloidal Fe(C2O4)·2H2O metal salt are achieved with comb-polyelectrolyte surfactants and/or mildly polar resins. TiO2 dispersions are spun and solidified “on the fly” by UV radiation into continuous ceramic/polymer nanocomposite fibers with dimensions below 10 μm. Fe(C2O4)·2H2O dispersions provide a UV curable alternative to α-Fe2O3 dispersions which can only be thermally cured. The Fe(C2O4)·2H2O nanocomposites transform to α-Fe2O3 below 550 °C. Novel cellular Al2O3, TiO2 and α-Fe2O3 articles with porosity >80% and precise replication of the pore-forming agents have also been produced from such dispersions. Al2O3 nanocomposite microspheres are produced by emulsification of the dispersions in an appropriate medium and UV curing.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::802ada43d00663c5eb3f8b17aba9725c https://doi.org/10.1016/j.jeurceramsoc.2010.12.006 Zobrazit plný text záznamu Full Text from ScienceDirect