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Surface Modification of Multiwall Carbon …
Surface Modification of Multiwall Carbon Nanotubes by Sulfuric Acid and Nitric Acid Muhammad Ali Turgunov1, Jin Oh Oh1, and Sung Ho Yoon1,* 1 Department of Mechanical Engineering, Kumoh National Institute of Technology, 61 Daehak-ro, Gumi, 730-701, Gyeongbuk, Korea * Corresponding Author: +82-54-478-7299, Fax: +82-54-478-7319, e-mail: Abstract. Surface Modification of Multiwall Carbon nanotubes (MWCNTs) was performed by a mixture of sulfuric acid and nitric acid. Pristine MWCNTs, vacuum heating dry MWCNTs, and vacuum freezing dry MWCNTs were prepared. According to the results, acid treatments give more carboxyl groups on the Surface of the MWCNTs. In addition, vacuum freezing dry treatment provides less damaged MWCNTs than vacuum heating dry treatment.
stretching at 3315 cm –1. due to hydroxyl groups, C=O at 1737 cm –1. due to carboxyl groups. Fig. 2. Fourier transform infrared spectroscopic spectra: …
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