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The influence of tetraethoxysilane sol preparation on the electrospinning of silica nanofibers

Jozefien Geltmeyer (UGent) , Jonathan De Roo (UGent) , Freya Van den Broeck (UGent) , José Martins (UGent) , Klaartje De Buysser (UGent) and Karen De Clerck (UGent)
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Abstract
The critical parameters determining the electrospinning of silica nanofibers starting from tetraethoxysilane sols are reported. By controlling the reaction conditions, the rheological properties of the sol allowed for electrospinning without needing the addition of an organic polymer. This allows the polymer removal step, which is deleterious to the fibers and an economic and ecological inconvenience, to be skipped. The effects on the electrospinning process of the viscosity of the sol, the concentration of ethanol, the degree of crosslinking and the size of the colloidal species were studied in depth with ATR-FTIR, Si-29 NMR, H-1 NMR and DLS. Moreover, to separate the contributions of the different parameters three different set-ups for sol preparation were used. An optimum amount of 9 mol L-1 ethanol for electrospinning was determined. In addition, the optimum degree of crosslinking and size of colloidal particles, approximately 3.5-7 nm, were obtained for stable electrospinning and for producing uniform, beadless nanofibers that were stable in time. The optimum viscosity range is in between 100 and 200 mPa s, which is in line with previous work. Using these optimum conditions, continuous electrospinning was carried out for 3 h, resulting in large flexible silica nanofibrous membranes.
Keywords
NMR, Sol-gel, TEOS, Nanofibers, GEL PROCESS, FIBERS, FABRICATION, COMPOSITE, SPECTROSCOPY, SPECTRA, SOLVENT, Electrospinning

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MLA
Geltmeyer, Jozefien et al. “The Influence of Tetraethoxysilane Sol Preparation on the Electrospinning of Silica Nanofibers.” JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY 77.2 (2016): 453–462. Print.
APA
Geltmeyer, J., De Roo, J., Van den Broeck, F., Martins, J., De Buysser, K., & De Clerck, K. (2016). The influence of tetraethoxysilane sol preparation on the electrospinning of silica nanofibers. JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY, 77(2), 453–462.
Chicago author-date
Geltmeyer, Jozefien, Jonathan De Roo, Freya Van den Broeck, José Martins, Klaartje De Buysser, and Karen De Clerck. 2016. “The Influence of Tetraethoxysilane Sol Preparation on the Electrospinning of Silica Nanofibers.” Journal of Sol-gel Science and Technology 77 (2): 453–462.
Chicago author-date (all authors)
Geltmeyer, Jozefien, Jonathan De Roo, Freya Van den Broeck, José Martins, Klaartje De Buysser, and Karen De Clerck. 2016. “The Influence of Tetraethoxysilane Sol Preparation on the Electrospinning of Silica Nanofibers.” Journal of Sol-gel Science and Technology 77 (2): 453–462.
Vancouver
1.
Geltmeyer J, De Roo J, Van den Broeck F, Martins J, De Buysser K, De Clerck K. The influence of tetraethoxysilane sol preparation on the electrospinning of silica nanofibers. JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY. 2016;77(2):453–62.
IEEE
[1]
J. Geltmeyer, J. De Roo, F. Van den Broeck, J. Martins, K. De Buysser, and K. De Clerck, “The influence of tetraethoxysilane sol preparation on the electrospinning of silica nanofibers,” JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY, vol. 77, no. 2, pp. 453–462, 2016.
@article{6959183,
  abstract     = {The critical parameters determining the electrospinning of silica nanofibers starting from tetraethoxysilane sols are reported. By controlling the reaction conditions, the rheological properties of the sol allowed for electrospinning without needing the addition of an organic polymer. This allows the polymer removal step, which is deleterious to the fibers and an economic and ecological inconvenience, to be skipped. The effects on the electrospinning process of the viscosity of the sol, the concentration of ethanol, the degree of crosslinking and the size of the colloidal species were studied in depth with ATR-FTIR, Si-29 NMR, H-1 NMR and DLS. Moreover, to separate the contributions of the different parameters three different set-ups for sol preparation were used. An optimum amount of 9 mol L-1 ethanol for electrospinning was determined. In addition, the optimum degree of crosslinking and size of colloidal particles, approximately 3.5-7 nm, were obtained for stable electrospinning and for producing uniform, beadless nanofibers that were stable in time. The optimum viscosity range is in between 100 and 200 mPa s, which is in line with previous work. Using these optimum conditions, continuous electrospinning was carried out for 3 h, resulting in large flexible silica nanofibrous membranes.},
  author       = {Geltmeyer, Jozefien and De Roo, Jonathan and Van den Broeck, Freya and Martins, José and De Buysser, Klaartje and De Clerck, Karen},
  issn         = {0928-0707},
  journal      = {JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY},
  keywords     = {NMR,Sol-gel,TEOS,Nanofibers,GEL PROCESS,FIBERS,FABRICATION,COMPOSITE,SPECTROSCOPY,SPECTRA,SOLVENT,Electrospinning},
  language     = {eng},
  number       = {2},
  pages        = {453--462},
  title        = {The influence of tetraethoxysilane sol preparation on the electrospinning of silica nanofibers},
  url          = {http://dx.doi.org/10.1007/s10971-015-3875-1},
  volume       = {77},
  year         = {2016},
}

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