Journal
LANGMUIR
Volume 36, Issue 35, Pages 10331-10340Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.langmuir.0c01104
Keywords
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Funding
- National Research Foundation of Korea Grant - Korean Government [NRF-2017R1C1B2011235]
- Korea Institute of Geoscience and Mineral Resources (KIGAM) [20-6825]
- Basic Research Project of the Korea Institute of Geoscience and Mineral Resources (KIGAM) - Ministry of Science, ICT, and Future Planning of Korea [20-3212-1]
- National Research Council of Science & Technology (NST), Republic of Korea [20-3212-1] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Herein, alumina foams were prepared from particle-stabilized foams, fabricated by direct foaming methods, that varied according to the concentration of sodium dodecyl sulfate (SDS). To confirm the formation mechanism of pore structures in alumina ceramic foams with varying SDS concentrations, the adsorption density, contact angle, ?-potential, and surface tension of the alumina particles dispersed in SDS were analyzed. Additionally, model analysis was performed to confirm the interaction between alumina and air bubbles by applying the extended DerjaguinLandauVerweyOverbeek model. The attachment of alumina particles to bubble surfaces at different SDS concentrations affected the pore structure of the ceramic foams; this confirmed that the attachment was significantly affected by the electrostatic interaction energy rather than hydrophobic interaction. Therefore, the pore size and connectivity of alumina foams could be controlled by varying the electrostatic interaction energy between alumina particles and air bubbles, which is determined by the SDS concentration.
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