Electrospun poly(vinyl alcohol) as a template of silica hollow and solid micro-fibrous mats

Yuki SHIROSAKI; Hiroki YOSHIHARA; Song CHEN; Mark BLEVINS; Yuri NAKAMURA; Nobutaka HANAGATA; Satoshi HAYAKAWA; Artemis STAMBOULIS; Akiyoshi OSAKA

doi:10.2109/jcersj2.120.520

Feature: Advanced Ceramic Science and Technology in the Western Pacific Rim Area: Papers

Electrospun poly(vinyl alcohol) as a template of silica hollow and solid micro-fibrous mats

Yuki SHIROSAKI, Hiroki YOSHIHARA, Song CHEN, Mark BLEVINS, Yuri NAKAMURA, Nobutaka HANAGATA, Satoshi HAYAKAWA, Artemis STAMBOULIS, Akiyoshi OSAKA

Author information

Yuki SHIROSAKI
Graduate School of Natural Science and Technology, Okayama University
Hiroki YOSHIHARA
Graduate School of Natural Science and Technology, Okayama University
Song CHEN
National Institute of Materials Science
Mark BLEVINS
School of Metallurgy and Materials, University of Birmingham Edgbaston
Yuri NAKAMURA
Graduate School of Natural Science and Technology, Okayama University
Nobutaka HANAGATA
National Institute of Materials Science
Satoshi HAYAKAWA
Graduate School of Natural Science and Technology, Okayama University
Artemis STAMBOULIS
School of Metallurgy and Materials, University of Birmingham Edgbaston
Akiyoshi OSAKA
Graduate School of Natural Science and Technology, Okayama University

Keywords: Silica, Nanofiber, Nanotubes, Sol–gel, Electrospinning, Poly(vinyl alcohol)

JOURNAL FREE ACCESS

2012 Volume 120 Issue 1407 Pages 520-524

DOI https://doi.org/10.2109/jcersj2.120.520

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Abstract

Silica fiber mats were fabricated by soaking electro-spun poly(vinyl alcohol) fibril mat in NH₄OH-catalyzed (Stöber type) colloidal silica sol and silica oligomer solution from HCl-catalysis of the system tetraethoxysilane, ethanol, and water, followed by appropriate heat treatments. The silica fibrils from the Stöber silica sol were hollow nano-tubes (NT) consisting of nano-sized silica particles, while the silica nanofibers (NF) from the acid-catalyzed sol were solid with minimal porosity. A model was proposed for the NF and NT formation processes.

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