Grafting of aldehyde structures to single‐walled carbon nanotubes for application in phenolic resin‐based composites |
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| Authors: | Yehai Yan Shuai Zhao Jian Cui Shaobei Yang |
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| Institution: | 1. Key Lab of Rubber‐Plastics (QUST), Ministry of Education, Qingdao University of Science and Technology, Qingdao 266042, China;2. College of Polymer Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, China |
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| Abstract: | Grafting of aldehyde structures to single‐walled carbon nanotubes (SWNTs) has been carried out to endow the nanotubes with appropriate wettability. The results of Fourier transform infrared (FTIR) spectroscopy, ultraviolin‐visible‐near infrared (UV‐VIS‐NIR) spectroscopy, and Raman spectroscopy provide the supporting evidence of aldehyde structures covalently attached to SWNTs. The improved wettability of aldehyde‐functionalized SWNTs (f‐SWNTs) was demonstrated by their good dispersion in organic medium, namely, ethanol and phenolic resin. The prospective covalent bonding between aldehyde structures on the surfaces of f‐SWNTs and phenolic resin makes it possible to prepare an integrated composite with the enhanced‐interfacial adhesion. The f‐SWNT composites, therefore, show much higher average values of dσ/dWCNT and dE/dWCNT (i.e., tensile strength and Young's modulus per unit weight fraction) compared with the composites filled with pristine SWNTs or MWNTs. The respective maxima are 9680 MPa and 320 GPa. It is thus feasible for f‐SWNTs to prepare the moderately enhanced but lightweight phenolic composites. Furthermore, the incorporation of f‐SWNTs does not limit the application of phenolic resin as insulation material. © 2009 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 47: 6135–6144, 2009 |
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| Keywords: | adhesion aldehyde‐functionalized nanotubes composites dispersion phenolic resin single‐walled carbon nanotube wettability |
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