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Citation: WANG Guo-Jian, QU Ze-Hua, LI Yan, LIU Lin. Functionalization of Multiwalled Carbon Nanotubes with Hyperbranched Polyester[J]. Chinese Journal of Applied Chemistry, ;2007, 24(7): 828-831. shu

Functionalization of Multiwalled Carbon Nanotubes with Hyperbranched Polyester

1.
School of Materials Science and Engineering, Tongji University, Shanghai 200092

Corresponding author: WANG Guo-Jian,
Received Date: 23 August 2006
Available Online: 1 November 2006

Multiwall carbon nanotubes (MWNT) functionalized with H20 and H40 hyperbranched polyesters were synthesized.MWNT was first purified by a 3:1 concentrated H₂SO₄:HNO₃ mixture and further acidified in a mixture of concentrated H₂SO₄:30% aqueous H₂O₂ of 4:1 for oxidizing into carboxylate group,then the carboxyl terminated MWNT reacted with SOCl₂ to form MWNT-COCl.The MWNT-COCl was reacted with the hydroxyl of hyperbranched polymer to obtain the hyperbranched polymer functionalized MWNT.The characterized results of FTIR,Raman,TEM and TG proved the existence of covalently chemical bond between nanotube and hyperbranched polymerester.The coating density of H20 was that every 321 carbon atoms were connected with one polymer chain,while the coating density of H40 was that every 842 carbon atoms were connected with one polymer chain.The dispersion of MWNT in solvent after modification was better than the dispersion of MWNT in solvent before modification.
- Multiple-wall carbon nanotube,
- chemical modification,
- hyperbranched polyester
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