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Functionalized Multi-Walled Carbon Nanotubes Prepared by In Situ Polycondensation of Polyurethane

✍ Scribed by Xianhong Chen; Xiaojin Chen; Ming Lin; Wenbin Zhong; Xiaohua Chen; Zhenhua Chen

Publisher
John Wiley and Sons
Year
2007
Tongue
English
Weight
624 KB
Volume
208
Category
Article
ISSN
1022-1352

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✦ Synopsis

Abstract

Treating MWCNTs with an acidic solution (concentrated H~2~SO~4~/HNO~3~; 3:1) and subsequently with succinic acid peroxide leads to MWCNTs functionalized with carboxyl groups on their sidewalls (or surfaces). These MWCNT‐COOH were converted to MWCNT‐COCl and further to MWCNT‐NH~2~. The PU was covalently coated onto the sidewalls (or surfaces) of the MWCNT by in situ polymerization of TDI under ultrasound in the presence of MWCNT‐NH~2~. The results show that PU is chemically tethered to the MWCNT sidewalls (or surfaces) via the ∼HNCONH∼ linkage, with a thickness in the range of approximately 2 to 5 nm, and the amount of grafted PU is about 34 wt.‐%.

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