Silica aerogel: ฉนวนกันความร้อนที่ดีที่สุดในโลก โดย ดร.สุพรรณ ยอดยิ่งยง credit: http://www.il.mahidol.ac.th/km/images/booklet/etc/27-etc-1.pdf

1. Silica aerogel: ÞîüîÖĆîÙüćöøšĂîìĊęéĊìĊęÿčéĔîēúÖ
éø.ÿčóøøè ÷Ăé÷ĉęÜ÷Ü
Silica aerogel đðŨîüĆÿéč×ĂÜĒ×ĘÜìĊęđïćĒúąđðŨîÞîüîìĊęéĊìĊęÿčéĔîēúÖ(NASA, 2003) ÿĆÜđÙøćąĀŤ×ċĚîēé÷ÖćøĒìîìĊę
×ĂÜđĀúü (solvent) õć÷ĔîđÝú (silica gel) éšü÷ĂćÖćý óĎéÜŠć÷ė ÖĘÙČĂìĞćĔĀšđÝúĒĀšÜēé÷ìĊęēÙøÜÿøšćÜ×ĂÜđÝúĕöŠđðúĊę÷îĒðúÜ
ÝćÖđéĉööćÖîĆÖ (ðøĉöćêø×ĂÜđÝúÖŠĂîĒúąĀúĆÜÖćøìĞćĒĀšÜĕöŠĒêÖêŠćÜÖĆî) àċęÜöĊñúìĞćĔĀšõć÷ĔîēÙøÜÿøšćÜ×ĂÜ silica aerogel
ðøąÖĂïéšü÷ĂćÖćýöćÖÖüŠć 99 % ìĞćĔĀšsilica aerogel đðŨîüĆÿéčìĊęöĊÙüćöĀîćĒîŠîîšĂ÷öćÖ öĊóČĚîìĊęñĉüÿĎÜ ĒúąîĂÖÝćÖîĊĚ
silica aerogel ÷ĆÜöĊÙčèÿöïĆêĉóĉđýþĂČęîėĂĊÖđߊî öĊÙŠćéĆßîĊĀĆÖđĀêĞęć đðŨîêĆüóćÙúČęîđÿĊ÷ÜìĊęĕöŠéĊ öĊÙŠćÖćøîĞćÙüćöøšĂîêĞęć (ther-
mal conductivity ~0.017 Wm-1K-1) (Bhagat, Kim, Ahn, & Yeo, 2007; Bhagat et al., 2008; Hüsing & Schubert,
1998; Schultz, Jensen, & Kristiansen, 2005) ÝćÖÙčèÿöïĆêĉóĉđýþêŠćÜė éĆÜÖúŠćüìĞćĔĀš silica aerogel ëĎÖîĞćĕðĔßšĔî
ÜćîĀúćÖĀúć÷øĎðĒïï đߊî đðŨîÞîüîÖĆîÙüćöøšĂîĒúąÙüćöđ÷Ęî×ĂÜĂčðÖøèŤêŠćÜė đðŨîêĆüđøŠÜðäĉÖĉøĉ÷ć đðŨîêšî îĂÖÝćÖ
îĊĚ silica aerogel ÷ĆÜöĊÖćøîĞćĕðĔßšđðŨîÞîüîÖĆîÙüćöøšĂîĔîĂüÖćý ēé÷ĂÜÙŤÖćø NASA Ĕßš silica aerogel đðŨîÞîüîÿĞćĀøĆï
üĆÿéčéĆÖÝĆïĂîčõćÙòčśîĔîĂüÖćý ĔîēÙøÜÖćø Stardust ĒúąĔßšđðŨîÞîüîÖĆîÙüćöøšĂîÿĞćĀøĆï÷ćîÿĞćøüÝéćüĂĆÜÙćø sili-
ca aerogel ðøąéĉþåŤ×ċĚîÙøĆĚÜĒøÖēé÷ Steven Kistler ĔîðŘ 1931 ēé÷ÖćøìĞćĔĀš silica gel ĒĀšÜõć÷ĔêšĂčèĀõĎöĉĒúąÙüćö
éĆîüĉÖùê (supercritical drying) àċęÜöĊĂčèĀõĎöĉĒúąÙüćöéĆîÿĎÜöćÖ ×ĂÜđĀúüõć÷ĔîđÝúÝąëĎÖÖĞćÝĆéĂĂÖĕð ēé÷đÝúĕöŠđÿĊ÷
øĎðĒúą×îćé ÖćøđêøĊ÷ö silica aerogel ēé÷Ĕßš supercritical drying êšĂÜìĞćìĊęĂčèĀõĎöĉĒúąÙüćöéĆîÿĎÜĒúąĔßšÿćøêĆĚÜ
êšîìĊęöĊøćÙćĒóÜ ìĞćĔĀšêšîìčîÖćøñúĉê silica aerogel öĊøćÙćÿĎÜêćöĕðéšü÷ àċęÜđðŨîđĀêčñúìĊęìĞćĔĀšĕöŠöĊÖćøîĞć silica aero-
gel öćĔßšĔîÜćîêŠćÜė ĒóøŠĀúć÷Ă÷ŠćÜìĊęÙüø ĒêŠÝćÖÖćøìĊę silica aerogel đðŨîüĆÿéčìĊęöĊÙčèÿöïĆêĉóĉđýþêŠćÜė öćÖöć÷
(ēé÷đÞóćąĔîđøČęĂÜÖćøđðŨîÞîüî) ìĞćĔĀšĔîðŦÝÝčïĆîöĊÖćøìĞćüĉÝĆ÷đóČęĂúéêšîìčîĔîÖćøÿĆÜđÙøćąĀŤ silica aerogel ēé÷Öćø
ĔßšüĉíĊÖćøÿĆÜđÙøćąĀŤìĊęĂčèĀõĎöĉĒúąÙüćöéĆîðÖêĉ ĔßšÿćøêĆĚÜêšîìĊęöĊøćÙćëĎÖ úéøą÷ąđüúćĔîÖćøÿĆÜđÙøćąĀŤĔĀšÿĆĚîúÜ đðŨîêšî
Silica aerogel ÿĞćĀøĆïÖćøðøą÷čÖêŤĔßšđðŨîÞîüîĔîÜćîêŠćÜ ė
õćóÝćÖ
http://science24.com/paper/23256
http://www.aerogel.com/markets/images/outdoor_ųg3_full.jpg
http://spinoff.nasa.gov/spinoff2001/ch5.html
đĂÖÿćøĂšćÜĂĉÜ
NASA. (2003). Guinness Records Names JPL’s Aerogel World’s Lightest Solid. http://stardust.jpl.nasa.gov/news/news93.html.
Bhagat, S. D., Kim, Y.-H., Ahn, Y.-S., & Yeo, J.-G. (2007). Rapid synthesis of water-glass based aerogels by in situ surface modiųcation of the hydrogels. Applied Surface Science,
253(6), 3231-3236.
Bhagat, S. D., Kim, Y.-H., Yi, G., Ahn, Y.-S., Yeo, J.-G., & Choi, Y.-T. (2008). Mesoporous SiO2 powders with high speciųc surface area by microwave drying of hydrogels: A facile
synthesis. Microporous and Mesoporous Materials, 108(1–3), 333-339.
Hüsing, N., & Schubert, U. (1998). Aerogels—Airy Materials: Chemistry, Structure, and Properties. Angewandte Chemie International Edition, 37(1-2), 22-45.
Schultz, J. M., Jensen, K. I., & Kristiansen, F. H. (2005). Super insulating aerogel glazing. Solar Energy Materials and Solar Cells, 89(2–3), 275-285.
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