The synthesis of functionalized carbon nanotubes by hyperbranched poly(amine-ester) with liquid-like behavior at room temperature

• Published in: Polymer (Guilford) Vol. 50; no. 13; pp. 2953 - 2957
• Main Authors: Zhang, Jiaoxia, Zheng, Yaping, Yu, Peiying, Mo, Su, Wang, Rumin
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 19-06-2009; Elsevier
• Subjects: Applied sciences; Carbon nanotubes; Chemical modifications; Chemical reactions and properties; Exact sciences and technology; Liquid-like behavior; Organic polymers; Physicochemistry of polymers; Solvent-free nanofluids; Carbon nanotubes; Liquid-like behavior; Solvent-free nanofluids; Viscoelasticity; Surface reaction; Branched polymer; Thermal transition; Ester polymer; Experimental study; Esterification; Thermal stability; Chemical coupling; Functionalized nanotube; Hyperbranched polymer; Multiwalled nanotube; Morphology; Aliphatic polymer; Preparation; Nanofluidics; Graft polymers
• ISSN: 0032-3861; 1873-2291
• DOI: 10.1016/j.polymer.2009.04.042

The solvent-free multi-walled carbon nanotubes (MWNTs) nanofluids are obtained through acid–base reaction and hydrogen bond roles with hyperbranched poly(amine-ester) (HPAE). MWNTs content is 16.8
wt%. The functionalized MWNTs exhibit liquid-like behavior in absence of solvent at room temperature. Correspondingly, the dense surface coverage is one modifying molecule per 30 carbon atoms on the surface of MWNTs. The functionalized MWNTs are soluble in good solvent of HPAE, but insoluble in non-solvent of HPAE. Their dispersibility, high thermal stability and ability to flow at room temperature make them attractive as lubricants, plasticizers and film-forming precursors.
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