Skip to main content
SpringerLink
Log in

Synthesis and thermal insulation performance of silica aerogel from recycled coal gangue by means of ambient pressure drying

  • Published:
Journal of Wuhan University of Technology-Mater. Sci. Ed. Aims and scope Submit manuscript

Abstract

Silica aerogel materials are well recognized for their superinsulation performance and are regarded as one of the hot candidates to revolutionize building insulation. To date, high production cost related to exorbitant precursors as well as cumbrous multi-step hydrophobization process has often narrowed the field of applications. In this work, granular silica aerogel materials were synthesized by extracting SiO2 from recycled rich silicon coal gangue, followed by one-step hydrophobization and ambient pressure drying. Lightweight (about 0.16 g/cm3) and nanostructural aerogels were obtained through this route. They exhibit a 3D open porous microstructure with around 600 cm2/g surface area and 20 nm of the average pore diameter, thermal conductivity of 4-5 mm packed granules is 20-25 mW/(m·K), which was proved by both guarded hot plate and hot-wire transient methods. This study offers a new facile route for the synthesis of silica aerogel from recycled solid waste coal gangue and suggests a method, which may lead to a cost reduction in terms of industrial production.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  1. Pierre A, Rigacci A. SiO2 Aerogels, in Aerogels Handbook [M]. M A Aegerter, N Leventis, and M M Koebel, Editors. New York: Springer, 2011

  2. Baetens R, Jelle BP, Gustavsen A. Aerogel Insulation for Building Applications: A State-of-the-art Review [J]. Energ. Buildings, 2011, 43(4): 761–769

    Article  Google Scholar 

  3. Soleimani Dorcheh A, Abbasi MH. Silica Aerogel; Synthesis, Properties and Characterization [J]. J. Mater. Process. Technol., 2008, 199(1-3): 10–26

    Article  Google Scholar 

  4. Wang L, Zhao S. Synthesis and Characteristics of Mesoporous Silica Aerogels with One-step Solvent Exchange/Surface Modification [J]. J. Wuhan Univ. Technol. -Mater. Sci. Ed., 2009, 24(4): 613–618

    Article  Google Scholar 

  5. Bhagat S D, Kim Y H, Ahn Y S, et al. Rapid Synthesis of Water-glass Based Aerogels by In-situ Surface Modification of the Hydrogels [J]. Appl. Surf. Sci., 2007, 253(6): 3231–3236

    Article  Google Scholar 

  6. Venkateswara R A, Nilsen E, Einarsrud M A. Effect of Precursors, Methylation Agents and Solvents on the Physicochemical Properties of Silica Aerogels Prepared by Atmospheric Pressure Drying Method [J]. J. Non-Cryst. Solids, 2001, 296(3): 165–171

    Article  Google Scholar 

  7. Venkateswara R A, Bhagat S D. Synthesis and Physical Properties of TEOS-based Silica Aerogels Prepared by Two Step (acid-base) Sol-gel Process [J]. Solid State Sci., 2004, 6(9): 945–952

    Article  Google Scholar 

  8. Dong L, Li Y, Yan J, et al. Efficient Extraction of SiO2 and Al2O3 from Coal Gangue by Means of Acidic Leaching [J]. Adv. Mater. Res., 2014, 878(2): 149–156

    Article  Google Scholar 

  9. Hou C, Wang S, Xie X. Study on Melting Available Silicone from Coal Gangue [J]. J. Coal Sci. Eng. China, 2009, 15(4): 426–429

    Article  Google Scholar 

  10. Zhu J, Cai H, Dang N. Study of Synthesis of SiO2 Aerogel from Coal Gangue at an Ambient Pressure [J]. Adv. Mater. Res., 2014, 997(3): 614–617

    Article  Google Scholar 

  11. Xu G, Li S, Pan X, et al. Study on Preparation of Amorphous Nanosilica from Coal Gangue [C]. in Materials for Renewable Energy & Environment (ICMREE), 2011 International Conference, 2011

    Google Scholar 

  12. Chen FQ, Li F, Chen RM, et al. Method for Preparing Silica through Coal Gangue Aluminum Extraction Waste Slag [P]. China Patents CN103420386A, 2013

    Google Scholar 

  13. Jia R, Zhao X. Waterglass Fabricated from Coal Gangue [P]. Chinese Patents CN102583417 A, 2012

    Google Scholar 

  14. Shi F, Wang L J. Rapid Synthesis of Silica Aerogels via a New Ambient Pressure Drying Process [J]. J.Dalian Uni. Technol., 2006, 46(2): 241–245

    Google Scholar 

  15. Stahl T, Brunner S, Zimmermann M, et al. Thermo-hygric Properties of a Newly Developed Aerogel Based Insulation Rendering for both Exterior and Interior Applications [J]. Energ. Buildings, 2012, 44(0): 114–117

    Article  Google Scholar 

  16. Karaipekli A, Sari A, Kaygusuz K. Thermal Conductivity Improvement of Stearic Acid using Expanded Graphite and Carbon Fiber for Energy Storage Applications [J]. Renewable Energy, 2007, 32(13): 2 201–2 210

    Article  Google Scholar 

  17. Frusteri F, Leonardi V, Vasta S, et al. Thermal Conductivity Measurement of a PCM Based Storage System Containing Carbon Fibers [J]. Appl. Therm. Eng., 2005, 25(11-12): 1623–1633

    Article  Google Scholar 

  18. Neugebauer A, Chen K, Tang A, et al. Thermal Conductivity and Characterization of Compacted, Granular Silica Aerogel [J]. Energ. Buildings, 2014, 79(0): 47–57

    Article  Google Scholar 

  19. Wagh P B, Begag R, Pajonk G M, et al. Comparison of Some Physical Properties of Silica Aerogel Monoliths Synthesized by Different Precursors [J]. Mater. Chem. Phy., 1999, 57(3): 214–218

    Article  Google Scholar 

Download references

Author information

Authors and Affiliations

  1. School of Environmental and Safety Engineering, Changzhou University, Changzhou, 213164, China

    Pinghua Zhu  (朱平华), Meng Zheng, Shanyu Zhao  (赵善宇), Junyong Wu & Haixun Xu  (徐海珣)

  2. Swiss Federal Institute for Materials Science, Bern, CH-8600, Switzerland

    Shanyu Zhao  (赵善宇)

Authors
  1. Pinghua Zhu  (朱平华)
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. Meng Zheng
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. Shanyu Zhao  (赵善宇)
    View author publications

    You can also search for this author in PubMed Google Scholar

  4. Junyong Wu
    View author publications

    You can also search for this author in PubMed Google Scholar

  5. Haixun Xu  (徐海珣)
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding authors

Correspondence to Shanyu Zhao  (赵善宇) or Haixun Xu  (徐海珣).

Additional information

Funded by the National Natural Science Foundation of China (Nos. 51308079, 51408073 and 51278073)

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Zhu, P., Zheng, M., Zhao, S. et al. Synthesis and thermal insulation performance of silica aerogel from recycled coal gangue by means of ambient pressure drying. J. Wuhan Univ. Technol.-Mat. Sci. Edit. 30, 908–913 (2015). https://doi.org/10.1007/s11595-015-1248-9

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s11595-015-1248-9

Keywords

Search

Navigation