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Preparation and thermal properties of chemically prepared nanoporous silica aerogels

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Abstract

This work focuses on the dependence preparation conditions—structure—physical properties of hydrophobic silica aerogels, all of them prepared under subcritical drying conditions (70 °C and 0.4 atm.), thus aiming at potential application as case insulation filling in heat pumps. The so prepared, millimeter scaled nano-porous hydrophobic silica aerogel granules were analyzed with standard electron microscope and atomic force microscopy, IR spectroscopy, UV/Vis spectroscopy, differential scanning calorimetry and thermal conductivity measurements. The physical properties of the aerogels were compared with commercial aerogel granules. A method for contact angle measurement of micro-droplets situated on the silica granules was proposed to quantify the level of their hydrophobicity.

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References

  1. Aravind PR, Shajesh P, Soraru GD, Warrier KGK (2010) J Sol–Gel Sci Technol. doi:10.1007/s1097101021642

    Google Scholar 

  2. Pierre AC, Pajonk GM (2002) Chem Rev 102:4243–4265

    Article  Google Scholar 

  3. Smitha S, Shajesh P, Rajesh Kumar S, Krishna Pillai P, Warrier KGK (2007) J Porous Mater. Doi:10.1007/s1093400690007

  4. Smitha S, Shajesh P, Aravind PR, Rajesh Kumar S, Krishna Pillai P, Warrier KGK (2006) Microporous Mesoporous Mater 91:286–292

    Article  Google Scholar 

  5. Sarawade PB, Kim J-K, Park J-K, Kim H-K (2006) Aerosol Air Qual Res 6:93–105

    Google Scholar 

  6. Kim C-Y, Jang A-R, Kim B-I, Suh D-H (2008) J Sol–Gel Sci Technol. doi:10.1007/s1097100818140

    Google Scholar 

  7. Hilongaa A, Kimb J-K, Sarawadea PB, Kima HT (2009) J Alloys Compd 487:744–750

    Article  Google Scholar 

  8. Aegerter MA, Leventis M, Koebel M (eds) (2011) Aerogel handbook. Springer, Berlin

  9. Deshpande R, Smith DM, Brinker JJ (1996) Preparation of high porosity xerogels by chemical surface modification. United States Patent:5 565 145

  10. Gutzov S, Danchova N, Ulbikas J, Boženko J (2013) Report on materials used for increment of Striling engine efficiency. Development of high efficiency stirling heat pump. www.effiheat.eu

  11. Gutzov S, Danchova N, Ulbikas J, Boženko J (2013) Preparation and thermal properties of chemically prepared nanoporous silica aerogels. EuroNanoForum Conference, Dublin, June 2013

  12. Rao AP, Pajonk GM, Rao AV (2005) J Mater Sci 40(13):3481–3489

    Article  Google Scholar 

  13. Rao AP, Rao AV, Pajonk GM (2005) J Sol–Gel Sci Technol 36(3):285–292

    Article  Google Scholar 

  14. www.cabot.com

  15. Papadopoulos AM (2005) Energy Build 37:77

    Article  Google Scholar 

  16. Couqard R, Quenard D (2007) Modeling of heat transfer in nanoporous silica. In: Proceedings of 8th international vacuum insulation Symposium 1:11

  17. Fricke J, Hümmer E, Morper HJ, Scheuerpflug P (1989) Revue de Physique Appliquée 4:87–97

    Google Scholar 

  18. Soleimani Dorcheh A, Abbasi MH (2008) J Mater Process Technol 199:10–26

    Article  Google Scholar 

  19. Kirbir F, Murata H, Meyers D, Chaudhuri R (1998) J Sol–Gel Sci Technol 13:311–316

    Article  Google Scholar 

  20. Xie Tao, He Y-L, Hu Z-J (2013) Int J Heat Mass Transf 58:540–552

    Article  Google Scholar 

  21. Danchova N, Gutzov S (2013) J Sol–Gel Sci Technol. doi:10.1007/s1097101330011

    Google Scholar 

  22. Koleva B, Ahmed G, Gutzov S, Petkov I (2008) Spectrochim Acta A Mol Biomol Spectrosc 69:587

    Article  Google Scholar 

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Acknowledgments

The authors acknowledge the financial support from Project FP7 EFFiHEAT. Thanks are due to K. Balashev and M. Spassova for experimental help.

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Authors and Affiliations

  1. Department of Physical Chemistry, Faculty of Chemistry and Pharmacy, University of Sofia, J. Bourchier Blvd. 1, 1164, Sofia, Bulgaria

    S. Gutzov, N. Danchova & S. I. Karakashev

  2. Institute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, 1113, Sofia, Bulgaria

    M. Khristov

  3. Industrial Applications Laboratory of Sol–Gel Technology, UAB “Modernios E-Technologijos”, Taikos av. 7, 31107, Visaginas, Lithuania

    J. Ivanova & J. Ulbikas

Authors
  1. S. Gutzov
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  2. N. Danchova
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  3. S. I. Karakashev
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  4. M. Khristov
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  5. J. Ivanova
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  6. J. Ulbikas
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Correspondence to S. Gutzov.

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Gutzov, S., Danchova, N., Karakashev, S.I. et al. Preparation and thermal properties of chemically prepared nanoporous silica aerogels. J Sol-Gel Sci Technol 70, 511–516 (2014). https://doi.org/10.1007/s10971-014-3315-7

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  • DOI: https://doi.org/10.1007/s10971-014-3315-7

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