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Synthesis of high temperature resistant ZrO2-SiO2 composite aerogels via “thiol-ene” click reaction

  • Original Paper: Sol-gel, hybrids and solution chemistries
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Abstract

We reported the preparation of a series of ZrO2-SiO2 composite aerogels via the sol-gel reaction between the zirconium source (ZrOCl2·8H2O) and the gel initiator (mercaptosuccinic acid-triethoxyvinylsilane). Such novel gel gelator was prepared by the thiol-ene click reaction using triethoxyvinylsilane (VTES) and mercaptosuccinic acid (MSA). The unique molecule structure of the gel initiator allows the in-situ modification of ZrO2 with SiO2 in the sol-gel reaction, which was achieved by the hydrolysis and polycondensation of siloxane with the change of the pH spontaneously. SiO2 with the controllable content can be in-situ introduced into ZrO2 backbone. As a result, the composite aerogel showed better thermal stability compared with pristine ZrO2 aerogel, proved by the following facts: (i) the aerogels remained amorphous after calcination in air at 600 °C; (ii) the specific surface area maintained at 53.4 m2/g when the temperature rising to 1000 °C.

ZrO2-SiO2 composite aerogels with improved thermal stability have been prepared via the “thiol-ene” click section

Highlights

  • ZrO2-SiO2 composite aerogels have been prepared via the “thiol-ene” click reaction from the zirconium source (ZrOCl2·8H2O) and the gel initiator (mercaptosuccinic acid-triethoxyvinylsilane).

  • The introduction of SiO2 into ZrO2 aerogel with the controllable content can be achieved by the in-situ hydrolysis of the gel initiator.

  • The ZrO2-SiO2 composite aerogel showed better thermal stability compared with pristine ZrO2 aerogel.

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Acknowledgements

This work is supported by National key research and development program (grant no. 2016YFB0901600) and NSCF (grant no. 21303162 and grant no. 11604295).

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Authors and Affiliations

  1. State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, 310027, Hangzhou, China

    Xiaoqing Wang, Zongxiao Wu, Mingjia Zhi & Zhanglian Hong

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  1. Xiaoqing Wang
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  2. Zongxiao Wu
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  3. Mingjia Zhi
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  4. Zhanglian Hong
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Correspondence to Mingjia Zhi or Zhanglian Hong.

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Wang, X., Wu, Z., Zhi, M. et al. Synthesis of high temperature resistant ZrO2-SiO2 composite aerogels via “thiol-ene” click reaction. J Sol-Gel Sci Technol 87, 734–742 (2018). https://doi.org/10.1007/s10971-018-4766-z

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  • DOI: https://doi.org/10.1007/s10971-018-4766-z

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