Optimizing surfactant templating of yttria-stabilized zirconia aerogels for high-temperature applications: Effect of cationic surfactant
نویسندگان
چکیده
Aerogels can be used in spaceflight applications as thermal insulators due to their low density, conductivity, and tortuous path for solid conduction. However, the aerogel formulation must optimized increase stability of aerogels, a drastic densification decrease surface area often is exhibited after high-temperature exposure. This work considers yttria-stabilized zirconia (YSZ) which have conductivity are expected temperatures between 600 °C 1000 °C. It anticipated that new sol-gel chemistries will yield YSZ aerogels exhibit retained mesoporous structure, increased area, minimized shrinkage upon exposure higher use range. investigates addition surfactant 20 mol% aerogels. The cationic surfactant, cetrimonium bromide (CTAB), was templating agent, preventing collapse structure gelation drying. determined adding one-half times critical micelle concentration CTAB by 72% 41% pore volume following °C, respectively. level had greatest compared without or with twice CTAB. By optimizing CTAB, enhanced make these materials more efficient when management systems.
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ژورنال
عنوان ژورنال: Microporous and Mesoporous Materials
سال: 2022
ISSN: ['1873-3093', '1387-1811']
DOI: https://doi.org/10.1016/j.micromeso.2021.111577