Processing of porous ceramic spheres by pseudo-double-emulsion method
Source abstract
Abstract
Abstract A process for the fabrication of porous ceramic spheres for microorganism carriers is described. A new fabrication method for the process was developed using simple gelcasting and bubble-in-water-in-oil type of pseudo-double-emulsion. The globules, consisting of a foamed mullite suspension, were dispersed and consolidated in spherical shape in liquid paraffin as gelation progressed. The green spheres were pyrolysed at 600 °C and sintered at 1500 °C. The influence of surfactants, extension ratio, and impeller revolution rate on the process and characteristics of the spheres was investigated. The sphere size was in the range 1–5 mm and determined directed by impeller revolution rate. The macropore size in the case of the anionic surfactant was less than that for the cationic surfactant. The inner macropores were interconnected and extended to the external surface. The macroporosity of macropores, in the range 65–79%, increased with extension ratio.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Bone Tissue Engineering Materials · Pickering emulsions and particle stabilization · Advanced ceramic materials synthesis
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (22)
Show source-provided references
1. Open-pore sintered glass as a high-efficiency support medium in bioreactors10.2166/wst.1990.0133 ↗
2. Wastewater treatment using activated sludge entrapped in polyethylene glycol prepolymer10.1016/S0922-338X(99)89019-9 ↗
3. Large scale anaerobic-aerobic treatment of complex industrial waste water using biofilm reactors10.2166/wst.1991.0595 ↗
4. Modification of porous silica with activated carbon and its application for fixation of yeasts10.1023/A:1026522401784 ↗
5. Testing of biological aerated filter (BAF) media10.1016/0273-1223(96)00600-2 ↗
6. Characklis · 1989
7. Processing of cellular ceramics by foaming and in situ polymerisation of organic monomers10.1016/S0955-2219(99)00024-2 ↗
8. Wismer · 1973
9. Properties of porous silica glasses prepared via sol–gel process10.1016/S0022-3093(00)00126-5 ↗
10. Fabrication of graded porous ceramics using alumina–carbon powder mixtures10.1016/S0272-8842(01)00004-9 ↗
11. K. Schwartzwalder, A.V. Somers, US patent 3 090 094, 21 May 1963.
12. Gelcasting of alumina10.1111/j.1151-2916.1991.tb04068.x ↗
13. Determination of the internal morphology of poly (D, L-lactide) microspheres using stereological methods10.1016/S0168-3659(98)00118-7 ↗
14. Double emulsions — scope, limitations and new achievements10.1016/S0927-7757(96)03809-5 ↗
15. Self-preservation of the drop size distribution function and variation in the stability ratio for rapid coalescence of a polydisperse emulsion in a simple shear field10.1006/jcis.1997.5217 ↗
16. Stein · 1996
17. Observation and segmentation of gray images of surface cells in open cellular ceramic foams10.2109/jcersj.109.1271_580 ↗
18. Processing and properties of cellular silica synthesized by foaming sol–gels10.1111/j.1151-2916.1990.tb05095.x ↗
19. Prud'homme · 1996
20. Pore dimensions for accumulating biomass. I. Microbes that reproduce by fission or by budding10.1002/bit.260210105 ↗
21. Performance of anaerobic packed-bed system with different media characteristics10.1016/0273-1223(96)00678-6 ↗
22. Influence of support media on biomass growth and retention in anaerobic filters10.1016/S0043-1354(98)00352-2 ↗