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Functionalized Multi‐Walled Carbon Nanotubes Prepared by In Situ Polycondensation of Polyurethane
Author(s) -
Chen Xianhong,
Chen Xiaojin,
Lin Ming,
Zhong Wenbin,
Chen Xiaohua,
Chen Zhenhua
Publication year - 2007
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.200600593
Subject(s) - carbon nanotube , polymer chemistry , polyurethane , covalent bond , condensation polymer , polymerization , in situ polymerization , materials science , peroxide , in situ , chemistry , polymer , chemical engineering , organic chemistry , composite material , engineering
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 ∼HNCONH∼ linkage, with a thickness in the range of approximately 2 to 5 nm, and the amount of grafted PU is about 34 wt.‐%.