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http://dx.doi.org/10.7317/pk.2014.38.3.378

Sonochemical Grafting of Poly(vinyl alcohol) onto Multiwall Carbon Nanotubes in Water  

Kim, Yeongseon (Department of Chemistry & Chemical Engineering, Inha University)
Baeck, Sung Hyeon (Department of Chemistry & Chemical Engineering, Inha University)
Shim, Sang Eun (Department of Chemistry & Chemical Engineering, Inha University)
Publication Information
Polymer(Korea) / v.38, no.3, 2014 , pp. 378-385 More about this Journal
Abstract
Multiwall carbon nanotubes (MWCNTs) were modified with a water soluble polymer, poly(vinyl alcohol), PVA, using a simple ultrasonic wave in water. Under the irradiation of ultrasound, PVA chains were severed as macroradicals and instantly grafted onto the surface of MWCNTs due to the radical scavenging effect of MWCNTs. To control the grafting PVA onto MWCNTs, the ultrasonication power and irradiation time were changed from 300 to 500 W and from 10 to 50 min, respectively. The grafted PVA onto MWCNTs was confirmed by FTIR, TGA, SEM, and TEM. Dispersion stability of the modified MWCNTs was monitored by Turbiscan. The amount of grafted PVA on MWCNTs increased with the increase in the sonication power and irradiation time. The grafted PVA on MWCNTs induced the improved dispersion stability of the modified MWCNTs in water. These findings exhibit that ultrasound can be readily used for the grafting polymer chains on MWCNTs.
Keywords
multiwall carbon nanotubes; poly(vinyl alcohol); surface modification; ultrasound; dispersion stability;
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