Please use this identifier to cite or link to this item: http://hdl.handle.net/10773/19261
Title: Cellular ceramics by gelatin gelcasting of emulsified suspensions with sunflower oil
Author: Sanches, M. F.
Vitorino, N.
Freitas, C.
Abrantes, J. C. C.
Frade, J. R.
Rodrigues Neto, J. B.
Hotza, D.
Keywords: IN-WATER EMULSIONS
POROUS CERAMICS
ALUMINA
RHEOLOGY
AGAROSE
CONSOLIDATION
BEHAVIOR
FOAMS
MODEL
Issue Date: 2015
Publisher: ELSEVIER SCI LTD
Abstract: Highly porous cellular ceramics were prepared by a versatile method combining emulsification of sunflower oil in alumina suspension, using collagen as surfactant, stabilizer and gelcasting additive. Emulsified suspensions show shear thinning behavior at emulsification temperatures, and their rheology was related to the volume fraction of dispersed oil droplets, collagen contents and stirring rate, based on a suitable Taguchi plan. This provides guidelines for the dependence of microstructural features on these processing parameters. The robustness of the method was demonstrated by the ability to perform early stages of burnout at relatively high heating rates, without risks of collapse or onset of factures in the resulting cellular ceramics. Combined DTG/DTA/FTIR studies were used to analyse the burnout stages, and provide guidelines to minimize emissions of gases with safety or environmental risks. (C) 2015 Elsevier Ltd. All rights reserved.
Peer review: yes
URI: http://hdl.handle.net/10773/19261
DOI: 10.1016/j.jeurceramsoc.2015.03.008
ISSN: 0955-2219
Publisher Version: 10.1016/j.jeurceramsoc.2015.03.008
Appears in Collections:CICECO - Artigos



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