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Controllable preparation of methyltriethoxysilane xerogel nanofibers

  • Yulong Xu
  • Ningxiao Gao
  • Yueying Gong
  • Shaosen Huo
  • Mohamedazeem M. Mohideen
  • Song Hong
  • Yong LiuEmail author
Ceramics
  • 10 Downloads

Abstract

In recent years, the controllable preparation of silicone xerogel nanofiber without the addition of a carrier polymer is becoming more and more attractive. The methyltriethoxysilane (MTES) sol prepared using MTES/H2O/ethanol in a molar ratio of 1:5:6 under acidic catalysis conditions has excellent spinnability in a long span of spinning time. Further, pure silicone nanofibers with different gelation times were prepared by electrospinning. The influence of gelation time on the colloidal particle morphology and size, cross-linking degree, and viscosity of as-synthesized silicone sols was studied in depth with SEM, DLS, and ATR-FTIR, and the effects on the morphology, hydrophobicity, and thermal stability of as-prepared xerogel nanofibers were also determined. As the gel time increased, there was a higher increase in the colloidal particle size, cross-linking degree, and viscosity of sol. The xerogel nanofibers with long gelation time exhibited higher hydrophobicity and thermal stability due to sufficient hydrolysis and condensation. The optimum gelation time was approximately 200 h, and the optimum viscosity range was in between 300 and 1000 cp, which were obtained for stable fiber jet and for preparing uniform and continuous xerogel nanofibers with excellent physical and chemical properties.

Notes

Acknowledgements

This study was funded by the National Natural Science Foundation of China (Grant Number 21374008).

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Supplementary material

10853_2019_3629_MOESM1_ESM.docx (1.5 mb)
Supplementary material 1 (DOCX 1574 kb)

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.College of Mechanical and Electric EngineeringBeijing University of Chemical TechnologyBeijingChina
  2. 2.College of Materials Science and EngineeringBeijing University of Chemical TechnologyBeijingChina

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