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Thermal stability of Al-modified silica aerogels through epoxide-assisted sol–gel route followed by ambient pressure drying

  • Original Paper: Fundamentals of sol–gel and hybrid materials processing
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Abstract

A novel method for preparing Al-modified silica aerogels with pretreated kaolin as the raw material is developed. Sols comprising silica and Al are prepared by an in situ reaction method from pretreated kaolin. The pretreatment step simplifies the process, saves preparation time, and reduces costs. A method for adjusting the Al content in the aerogel by changing the washing time of the sol during the ion impurity removal process is also presented. The volume stabilities and thermal properties of the Al-modified silica aerogels after high-temperature treatment are investigated. The results indicate that a small amount of modified Al improves the volumetric stability of an aerogel owing to viscous sintering of the Si–O–AlIV–(O–AlVI)y units, which increases the disorder of the SiO2 structure, building a barrier to viscous flow and hindering mass transfer.

Highlights

  • A novel method for preparing Al-modified silica aerogel through epoxide-assisted sol–gel route followed by ambient pressure drying with pretreated kaolin.

  • The Al content in the aerogel can be controlled by the washing times. Besides, most of AlVI and a small amount of AlIV in the aerogel has been clarified by 27Al NMR in the modified aerogel.

  • The Al-modified aerogel improves the thermal stability of the aerogel especially in the pore structure.

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References

  1. Gurav JL, Jung I-K, Park H-H, Kang ES, Nadargi DY (2010) Silica aerogel: synthesis and applications. J Nanomater 2010:1–11

    Article  Google Scholar 

  2. Lee K-H, Kim S-Y, Yoo K-P (1995) Low-density, hydrophobic aerogels. J Non Cryst Solids 186:18–22

    Article  Google Scholar 

  3. Omranpour H, Motahari S (2013) Effects of processing conditions on silica aerogel during aging: role of solvent, time and temperature. J Non Cryst Solids 379:7–11

    Article  Google Scholar 

  4. Liang X (2014) The study on the preparation and performance of high performance aerogel insulation materials. University of Guangzhou, Guangzhou

    Google Scholar 

  5. He Y-L, Xie T (2015) Advances of thermal conductivity models of nanoscale silica aerogel insulation material. Appl Therm Eng 81:28–50

    Article  Google Scholar 

  6. Amlouk A, El Mir L, Kraiem S, Alaya S (2006) Elaboration and characterization of TiO2 nanoparticles incorporated in SiO2 host matrix. J Phys Chem Solids 67(7):1464–1468

    Article  Google Scholar 

  7. Aravind PR, Mukundan P, Krishna Pillai P, Warrier KGK (2006) Mesoporous silica–alumina aerogels with high thermal pore stability through hybrid sol–gel route followed by subcritical drying. Microporous Mesoporous Mater 96(1–3):14–20

    Article  Google Scholar 

  8. Aegerter MA (2011) Advances in sol-gel derived materials and technologies. Springer, Berlin

    Google Scholar 

  9. Nadargi DY, Rao AV (2009) Methyltriethoxysilane: new precursor for synthesizing silica aerogels. J Alloy Compd 467(1–2):397–404

    Article  Google Scholar 

  10. Nadargi DY, Latthe SS, Hirashima H, Rao AV (2009) Studies on rheological properties of methyltriethoxysilane (MTES) based flexible superhydrophobic silica aerogels. Microporous Mesoporous Mater 117:617–626

    Article  Google Scholar 

  11. Nadargi DY, Latthe SS, Rao AV (2009) Effect of post-treatment (gel aging) on the properties of methyltrimethoxysilane based silica aerogels prepared by two-step sol–gel process. J Sol Gel Sci Technol 49(1):53–59

    Article  Google Scholar 

  12. Rao AV, Kalesh RR (2004) Organic surface modification of TEOS based silica aerogels synthesized by co-precursor and derivatization methods. J Sol Gel Sci Technol 30(3):141–147

    Article  Google Scholar 

  13. Sinkó K, Hüsing N, Goerigk G, Peterlik H (2008) Nanostructure of gel-derived aluminosilicate materials. Langmuir 24(3):949–956

    Article  Google Scholar 

  14. Dunphy DR, Singer S, Cook AW, Smarsly B, Doshi DA, Brinker CJ (2003) Aqueous stability of mesoporous silica films doped or grafted with aluminum oxide. Langmuir 19:10403–10408

    Article  Google Scholar 

  15. Zhang ZH, Zhu HJ, Zhou CH, Wang H (2016) Geopolymer from kaolin in China: An overview. Appl Clay Sci 119(Part 1):31–41

    Article  Google Scholar 

  16. Ptáček P, Šoukal F, Opravil T, Nosková M, Havlica J, Brandštetr J (2010) The kinetics of Al–Si spinel phase crystallization from calcined kaolin. J Solid State Chem 183(11):2565–2569

    Article  Google Scholar 

  17. Hu W, Li M, Chen W, Zhang N, Li B, Wang M, Zhao Z (2016) Preparation of hydrophobic silica aerogel with kaolin dried at ambient pressure. Colloids Surf A Physicochem Eng Asp 501:83–91

    Article  Google Scholar 

  18. Komameni S, Roy R, Selvaraj U, Malla PB, Breval E (1993) Nanocomposite aerogels: the SiO2-Al2O3 system. Mater Res Soc 8(12):3163–3167

    Article  Google Scholar 

  19. Padmajaa P, Warriera KGK, Padmanabhanb M, Wunderlichc W, Berryd FJ, Mortimerd M, Creamer NJ (2006) Structural aspects and porosity features of nano-size high surface area alumina–silica mixed oxide catalyst generated through hybrid sol–gel route. Mat Chem Phys 95:56–61

    Article  Google Scholar 

  20. Sinkó K (2010) Influence of chemical conditions on the nanoporous structure of silicate aerogels. Materials 3(1):704–740

    Article  Google Scholar 

  21. Hernandez C, Pierre AC (2001) Evolution of the texture and structure of SiO2–Al2O3 xerogels and aerogels as a function of the Si to Al molar ratio. J Sol Gel Sci Technol 20(3):227–243

    Article  Google Scholar 

  22. Wu X, Shao G, Cui S, Wang L, Shen X (2016) Synthesis of a novel Al2O3–SiO2 composite aerogel with high specific surface area at elevated temperatures using inexpensive inorganic salt of aluminum. Ceram Int 42(1, Part A):874–882

    Article  Google Scholar 

  23. Brahmi D, Merabet D, Belkacemi H, Mostefaoui TA, Ouakli NA (2014) Preparation of amorphous silica gel from Algerian siliceous by-product of kaolin and its physico chemical properties. Ceram Int 40(7, Part B):10499–10503

    Article  Google Scholar 

  24. Koebel MM, Nadargi DY, Jimenez-Cadena G et al. (2012) Transparent, conducting ATO thin films by epoxide-initiated sol-gel chemistry: a highly versatile route to mixed-metal oxide films. ACS Appl Mater Interfaces 4(5):2464

    Article  Google Scholar 

  25. Nadargi D, Kelly C, Wehrs J et al. (2014) Epoxide assisted metal oxide replication (EAMOR): a new technique for metal oxide patterning. RSC Adv 4(69):36494–36497

    Article  Google Scholar 

  26. Alexander EG, Thomas MT, Joe HS et al. (2001) Use of epoxides in the sol−gel synthesis of porous iron(III) oxide monoliths from Fe(III) salts. Chem Mater 13(3):999–1007

    Article  Google Scholar 

  27. P BE, G JL, P HP (1951) The determination of pore volume and area distributions in porous substances. I. Computations from nitrogen isotherms. J Am Chem Soc 73:373–380

    Article  Google Scholar 

  28. Shi F, Liu J-X, Song K, Wang Z-Y (2010) Cost-effective synthesis of silica aerogels from fly ash via ambient pressure drying. J Non Cryst Solids 356:2241–2246

    Article  Google Scholar 

  29. Wang L (2006) The experimental research of silica aerogel was prepared using high alumina coal ash. Ph.D. thesis, China University of Geosciences, Beijing

  30. Linsha V, Peer Mohamed A, Ananthakumar S (2015) Nanoassembling of thixotropically reversible alumino-siloxane hybrid gels to hierarchically porous aerogel framework. Chem Eng J 259:313–322

    Article  Google Scholar 

Download references

Acknowledgements

This research has been financially supported by the Nature Science Foundation of Hubei province (Project 2015CFA121) and Fundamental Research Funds for the Central Universities (WUT: 2017-YB-008 and 2017II010XZ).

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Authors and Affiliations

  1. State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, 430070, Wuhan, China

    Xuan Ling, Bo Li, Mengmeng Li, Wenbin Hu & Wei Chen

  2. School of Material Science and Engineering, Wuhan University of Technology, 430070, Wuhan, China

    Bo Li & Wei Chen

  3. National Engineering Laboratory for Fiber Optic Sensing Technology, Wuhan University of Technology, 430070, Wuhan, China

    Wenbin Hu

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  1. Xuan Ling
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  2. Bo Li
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  3. Mengmeng Li
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  4. Wenbin Hu
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  5. Wei Chen
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Correspondence to Wei Chen.

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Ling, X., Li, B., Li, M. et al. Thermal stability of Al-modified silica aerogels through epoxide-assisted sol–gel route followed by ambient pressure drying. J Sol-Gel Sci Technol 87, 83–94 (2018). https://doi.org/10.1007/s10971-018-4707-x

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  • DOI: https://doi.org/10.1007/s10971-018-4707-x

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