Macroporous titania monoliths from emulsion templated composites
- 44 Downloads
High internal phase emulsion (HIPE) templating approach, well known for the preparation of macroporous polymeric monoliths (polyHIPEs), was utilized for the synthesis of macroporous cellular interconnected titania ceramic monoliths. In order to derive the ceramic monolithic material from the precursor polymer, titania particles were introduced into the monomer containing emulsion phase. The morphology of the final ceramic monolith closely resembled the precursor polymer composite, featuring a 3D interconnected cellular structure with the first level of pores with an average diameter of 70–100 μm and channels connecting the first level of pores. Multifunctional acrylate monomer was used in a combination with photopolymerization for the preparation of composite polyacrylate/titania monolith. The ratio of particles to monomer and the temperature profile of sintering were the most important factors affecting the morphology of the final material. A significant increase in the modulus of the sintered material compared to the porous composite precursors was found.
KeywordsPorous ceramics polyHIPE Porous composite Titania
The authors are grateful to Dr. Thomas Koch from Vienna University of Technology for nanoindentation measurements.
Slovenian Research Agency funded this research through grant P2-006 and provided scholarship to A.K.
Compliance with ethical standards
Conflict of interest
The authors declare that they have no conflict of interest.
- 3.Brown DD, Green DJ (1994) Investigation of strut crack formation in open cell alumina ceramics. J Am Ceram Soc 77:1467–1472. https://doi.org/10.1111/j.1151-2916.1994.tb09744.x CrossRefGoogle Scholar
- 5.Santa Cruz H, Spino J, Grathwohl G (2008) Nanocrystalline ZrO2 ceramics with idealized macropores. J Eur Ceram Soc 28:1783–1791. https://doi.org/10.1016/j.jeurceramsoc.2007.12.028 CrossRefGoogle Scholar
- 18.Pulko I, Krajnc P (2017) Porous polymer monoliths by emulsion templating. Encycl Polym Sci Technol:1–28. https://doi.org/10.1002/0471440264.pst653
- 20.Silverstein MS, Tai H, Sergienko A, Lumelsky Y, Pavlovsky S (2005) PolyHIPE: IPNs, hybrids, nanoscale porosity, silica monoliths and ICP-based sensors. Polymer, vol 46, pp 6682–6694Google Scholar
- 31.Turnšek M, Krajnc P, Liska R, Koch T (2016) Macroporous alumina with cellular interconnected morphology from emulsion templated polymer composite precursors. J Eur Ceram Soc 36:1045–1051. https://doi.org/10.1016/j.jeurceramsoc.2015.11.036 CrossRefGoogle Scholar
- 40.Kovačič S, Ferk G, Drofenik M, Krajnc P (2012) Nanocomposite polyHIPEs with magnetic nanoparticles: preparation and heating effect. React Funct Polym 72:955–961. https://doi.org/10.1016/j.reactfunctpolym.2012.05.001 CrossRefGoogle Scholar