Abstract
Silica aerogel can be produced by using ambient pressure drying (APD) or supercritical drying depending on the required properties and kind of application. Processing time for ambient pressure dried silica aerogels are longer due to the time consuming steps such as hydrolysis and solvent exchange. Considerable decrease in time has been reported by a few research groups by employing shaking during the solvent exchange. We are reporting further reduction in processing time of tetraethoxysilane (TEOS)-based silica aerogel by carrying out the hydrolysis process at elevated temperature. The aerogel obtained in least processing time showed low density (0.066 kg/m3), low thermal conductivity (0.043 W/mK), high specific surface area, and porosity. This shows that elevated temperature hydrolysis does not hamper the desired properties of the product.
Highlights
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Rapid synthesis of hydrophobic silica aerogels is discussed in detail.
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Ambient pressure drying method used to produce silica aerogels in 16 h 50 min.
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Elevated temperature hydrolysis reduced the processing time without altering properties of aerogel.
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The aerogel obtained in least processing time showed low density, low thermal conductivity, high specific surface area and porosity.
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The aerogel is hydrophobic with water contact angle 140°.
References
Brinker CJ, Scherer GW (1990) Sol–gel science, 1st ed. Academic Press Inc, London, p 108–130. Chapter 3
Leventis N, Koebel MM (2011) In: Aegerter MA (ed.) Aerogels handbook. Springer Science & Business Media, Springer-Verlag, New York
Torres RB, Vareda JP, Lamy-Mendes A, Durães L (2019) J Supercrit Fluid 147:81
Yang Z, Zhu D, Li H (2020) Microporous Mesoporous Mater 293:109781. https://doi.org/10.1016/j.micromeso.2019.109781
Kwon YG, Choi SY, Yang ES, Baek SS (2000) J Mater Sci 35:6075
Gurav JL, Rao AV, Nadargi DY (2010) J Mater Sci 45:503
Mahadik DB, Rao AV, Kumar R, Ingale SV, Wagh PB, Gupta SC (2012) J Porous Mater 19:87
He S, Li Z, Shi X, Yang H, Gong L, Cheng X (2015) Adv Powder Technol 26:537
Clark J (2000) Calculations in AS/A level chemistry, Pearson Education Limited, Haloaw United Kingdom (Paperback)
Rao AV, Ganbavle VV, Bangi UKH, Dhere SL (2011) J Porous Mater 18:751. https://doi.org/10.1007/s10934-010-9444-7
Askwar H, Jong-Kil K, Sarawade P, Taik KH (2009) J Alloy Compd 487:744
Nassor ECO, Ávila LR, Pereira PFS, Ciuffi KJ, Calefi PS, Nassar EJ (2011) Mater Res 14:1
Omranpour H, Motahari S (2013) J Non-Cryst Solids 379:7
Pouretedal HR, Kazemi M (2012) Int J Ind Chem 3:20
Stroud RM, Long JW, Pietron JJ, Rolison DR (2004) A practical guide to transmission electron microscopy of aerogels. J Non-cryst Solids 350:277
Bikerman JJ (1958) 2nd edn. Surface chemistry: theory and applications. Academic, New York, p 343
Shin H, Cui J, Shen H, Wu H (2014) Adv Mater Sci Eng. ID 850420. https://doi.org/10.1155/2014/850420
Bangi UKH, Dhere SL, Rao AV (2010) J Mater Sci 45:2944
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Ganbavle, V.V., Kalekar, A.S., Harale, N.S. et al. Rapid synthesis of ambient pressure dried tetraethoxysilane based silica aerogels. J Sol-Gel Sci Technol 97, 5–10 (2021). https://doi.org/10.1007/s10971-020-05437-2
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DOI: https://doi.org/10.1007/s10971-020-05437-2