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Silica aerogel is one of aerogel type its has SiO2 three dimensional network structures. This material has density as low as air and very high melting point. It's characteristic of silica aerogal that support to applied for thermal insulator. Besides, the silica material is abundant nature reso...
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| Format: | Final Project |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/11617 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | Silica aerogel is one of aerogel type its has SiO2 three dimensional network structures. This material has density as low as air and very high melting point. It's characteristic of silica aerogal that support to applied for thermal insulator. Besides, the silica material is abundant nature resources, that make this material has special research concern.<p>In this research will focus on the process to produce silica aerogel by sol-gel method and drying by vacuum in the temperature range 30-40 oC. The sol-gel process take ratio (r) water/silica and pH as the main parameters. Ratio (r) held on 8, 15, and 20. pH held on 8,2 , 10,2 , and 12,3. Product of silica aerogel will define as the result of the variation.<p>XRD test shows peak with wide 2 theta region on 20 and 36 as the amorphous silica region. The two peaks after silica are intrusion peaks of NH4BF4 and NH4F. It decreases as ratio (r) water/silica and pH increases. FTIR test results shown that the absorbtion on Si-O-Si groups wavenumber present in the all r water/silica and pH variation samples. The wave number of -CH3 and -CH2 groups absorption that is ethanol compound found on the r 8 and pH 8,2 variation as results from condensation reactions and solvent. Silica aerogel has porous morfologi that showed from SEM photographs. <br />
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