Sol-Gel Synthesis of Multi-Walled Carbon Nanotubes Reinforced Alumina-Silica Fibers |
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| Authors: | Zhuang Kang Lixia Gu |
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| Affiliation: | 1. College of Materials Science and Engineering , Donghua University , Shanghai , People's Republic of China;2. State Key Laboratory for Modification of Chemical Fibers and Polymer Materials , Donghua University , Shanghai , People's Republic of China;3. College of Materials Science and Engineering , Donghua University , Shanghai , People's Republic of China |
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| Abstract: | Multi-walled carbon nanotubes (MWCNTs) reinforced alumina-silica fibers were prepared by the sol-gel dry-spinning method. Aluminum isopropoxide (AIP), aluminum nitrite (AN), and tetraethyl orthosilicate (TEOS) were used as starting materials to prepare spinnable aluminosilicate sols in aqueous media. Polyvinylpyrrolidone (PVP) was used as dispersant agent to homogeneous disperses MWCNTs in the spinnable aluminosilicate sol through an in-situ process. The structure and mechanical properties of the MWCNTs reinforced alumina-silica fibers were studied. The results revealed that homogeneous dispersion of MWCNTs in alumina-silica fibers improved their mechanical properties considerably. The addition of only 0.5 wt% acid-treated MWCNTs into alumina-silica fibers result in a 60% increase in tensile strength to 398 ± 45 MPa. |
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| Keywords: | alumina-silica fibers carbon nanotube nanocomposite polyvinylpyrrolidone sol-gel preparation |
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