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Optimum sol viscosity for stable electrospinning of silica nanofibres

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Abstract
Silica nanofibres have, due to their excellent properties, promising characteristics for multiple applications such as filtration, composites, catalysis, etc. Silica nanofibres can be obtained by combining electrospinning and the sol–gel process. To produce silica nanofibres most of the time organic solutions are applied containing a carrying polymer, which is afterwards removed by a thermal treatment to form pure ceramic nanofibres. Although electrospinning of the pure silica precursors without carrying polymer is preferred, the parameters influencing the stability of the electrospinning process are however largely unknown. In addition, this knowledge is essential for potential upscaling of the process. In this study, the optimum viscosity to electrospin in a stable manner is determined and the way to obtain this viscosity is evaluated. Sols with a viscosity between 120 and 200 mPa.s could be electrospun in a stable way, resulting in uniform and beadless nanofibres. Furthermore, this viscosity region corresponded with nanofibres having the lowest mean nanofibre diameters. Electrospinning with diluted sols was possible as well, but electrospinning of the fresh sols was more stable. These results illustrate the importance of the viscosity and degree of crosslinking of the sol for the stable electrospinning of silica nanofibres and demonstrate that upscaling of the electrospinning process of silica nanofibres is feasible
Keywords
FIBERS, COMPOSITE, GEL PROCESS, GLASS NANOFIBERS, Tetraethyl orthosilicate, Silica, Stability, Electrospinning, Sol-gel, MORPHOLOGY, DIAMETER, RESINS

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MLA
Geltmeyer, Jozefien, et al. “Optimum Sol Viscosity for Stable Electrospinning of Silica Nanofibres.” JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY, vol. 67, no. 1, 2013, pp. 188–95, doi:10.1007/s10971-013-3066-x.
APA
Geltmeyer, J., Van der Schueren, L., Goethals, F., De Buysser, K., & De Clerck, K. (2013). Optimum sol viscosity for stable electrospinning of silica nanofibres. JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY, 67(1), 188–195. https://doi.org/10.1007/s10971-013-3066-x
Chicago author-date
Geltmeyer, Jozefien, Lien Van der Schueren, Frederik Goethals, Klaartje De Buysser, and Karen De Clerck. 2013. “Optimum Sol Viscosity for Stable Electrospinning of Silica Nanofibres.” JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY 67 (1): 188–95. https://doi.org/10.1007/s10971-013-3066-x.
Chicago author-date (all authors)
Geltmeyer, Jozefien, Lien Van der Schueren, Frederik Goethals, Klaartje De Buysser, and Karen De Clerck. 2013. “Optimum Sol Viscosity for Stable Electrospinning of Silica Nanofibres.” JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY 67 (1): 188–195. doi:10.1007/s10971-013-3066-x.
Vancouver
1.
Geltmeyer J, Van der Schueren L, Goethals F, De Buysser K, De Clerck K. Optimum sol viscosity for stable electrospinning of silica nanofibres. JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY. 2013;67(1):188–95.
IEEE
[1]
J. Geltmeyer, L. Van der Schueren, F. Goethals, K. De Buysser, and K. De Clerck, “Optimum sol viscosity for stable electrospinning of silica nanofibres,” JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY, vol. 67, no. 1, pp. 188–195, 2013.
@article{3223956,
  abstract     = {{Silica nanofibres have, due to their excellent properties, promising characteristics for multiple applications such as filtration, composites, catalysis, etc. Silica nanofibres can be obtained by combining electrospinning and the sol–gel process. To produce silica nanofibres most of the time organic solutions are applied containing a carrying polymer, which is afterwards removed by a thermal treatment to form pure ceramic nanofibres. Although electrospinning of the pure silica precursors without carrying polymer is preferred, the parameters influencing the stability of the electrospinning process are however largely unknown. In addition, this knowledge is essential for potential upscaling of the process. In this study, the optimum viscosity to electrospin in a stable manner is determined and the way to obtain this viscosity is evaluated. Sols with a viscosity between 120 and 200 mPa.s could be electrospun in a stable way, resulting in uniform and beadless nanofibres. Furthermore, this viscosity region corresponded with nanofibres having the lowest mean nanofibre diameters. Electrospinning with diluted sols was possible as well, but electrospinning of the fresh sols was more stable. These results illustrate the importance of the viscosity and degree of crosslinking of the sol for the stable electrospinning of silica nanofibres and demonstrate that upscaling of the electrospinning process of silica nanofibres is feasible}},
  author       = {{Geltmeyer, Jozefien and Van der Schueren, Lien and Goethals, Frederik and De Buysser, Klaartje and De Clerck, Karen}},
  issn         = {{0928-0707}},
  journal      = {{JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY}},
  keywords     = {{FIBERS,COMPOSITE,GEL PROCESS,GLASS NANOFIBERS,Tetraethyl orthosilicate,Silica,Stability,Electrospinning,Sol-gel,MORPHOLOGY,DIAMETER,RESINS}},
  language     = {{eng}},
  number       = {{1}},
  pages        = {{188--195}},
  title        = {{Optimum sol viscosity for stable electrospinning of silica nanofibres}},
  url          = {{http://dx.doi.org/10.1007/s10971-013-3066-x}},
  volume       = {{67}},
  year         = {{2013}},
}

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