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Aerogels

Aerogels. Recipe Features Additional Information . Recipe. Ingredients Precondensed silica (Silbond H-5, TEOS, or equivalent) Catalyst (ethanol, water, aqueous ammonia or protic acid) Process Place material into autoclave filled with ethanol

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Aerogels

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  1. Aerogels • Recipe • Features • Additional Information

  2. Recipe • Ingredients • Precondensed silica (Silbond H-5, TEOS, or equivalent) • Catalyst (ethanol, water, aqueous ammonia or protic acid) • Process • Place material into autoclave filled with ethanol • Pressurize at 750-850 psi with CO2 & Temperature at 5-10 (C) • Use liquid CO2 to remove the ethanol • Adjust pressure and temperature to critical points of CO2 • Using drying process, finished product takes 12 hours to 6 days

  3. Features • Large internal surface area • 400-1000 m3/g • Mechanically strong • Support over 1500x own weight • Transparent / Optical clarity • Good heat/sound insulator • Extremely low density • 0.003 g/cm3

  4. Additional Information • Cost • Disadvantage • Types of Aerogels

  5. Reference • eande.lbl.gov/ECS/aerogels/satoc.htm • www.mkt-intl.com/aerogels/ • www.mrw.interscience.wiley.com/ueic/articles/

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