eduzhai > Physical Sciences > Materials Sciences >

Synthesis and characterization of fiber reinforced silicone aerogel insulation blanket

  • sky
  • (0) Download
  • 20211114
  • Save

... pages left unread,continue reading

Document pages: 8 pages

Abstract: Fiber reinforced silica aerogels were synthesized from four ethoxylsilane (TEOS) as silica source using methanol (MeOH), three methyl siloxane (TMCS), ammonium fluoride (NH4F) and hexane. The molar ratio of TEOS MeOH (COOH) 2 NH4F is maintained at 1  :   38  :   3.73 × 10 to 5.: 0.023, allowing the gel to form in the highly porous aramid fiber wadding. The surface of wet gel is chemically modified by silane process with different concentrations of TMC in hexane, and its volume ranges from 1 to 20 . Then the fiber reinforced silica aerogel blanket was obtained by atmospheric drying. The aerogel blanket samples were characterized by density, thermal conductivity, hydrophobicity (contact angle) and scanning electron microscope (SEM).roscopy. The radiant heat resistance of the aerogel blankets was examined and compared with nonaerogel blankets. It has been observed that, compared to the ordinary nonaerogel blankets, the aerogel blankets showed a 58 increase in the estimated burn injury time and thus ensure a much better protection from heat and fire hazards. The effect of varying the concentration of TMCS on the estimated protection time has been examined. The improved thermal stability and the superior thermal insulation of the flexible aerogel blankets lead to applications being used for occupations that involve exposure to hazards of thermal radiation.

Please select stars to rate!

         

0 comments Sign in to leave a comment.

    Data loading, please wait...
×