Materials, Interfaces, and Electrochemical Phenomena

Functionalization of multiwalled carbon nanotubes with amphiphilic poly(aspartic acid)

  1. Peijun Ji,
  2. Mei Yang,
  3. Wei Feng*

Article first published online: 28 MAY 2010

DOI: 10.1002/aic.12306

Issue

AIChE Journal

AIChE Journal

Volume 57, Issue 3, pages 772–777, March 2011

Additional Information

How to Cite

Ji, P., Yang, M. and Feng, W. (2011), Functionalization of multiwalled carbon nanotubes with amphiphilic poly(aspartic acid). AIChE J., 57: 772–777. doi: 10.1002/aic.12306

Author Information

  1. Dept. of Chemical Engineering, and Dept. of Biochemical Engineering, Beijing University of Chemical Technology, Beijing, China

*Dept. of Chemical Engineering, and Dept. of Biochemical Engineering, Beijing University of Chemical Technology, Beijing, China

Publication History

  1. Issue published online: 8 FEB 2011
  2. Article first published online: 28 MAY 2010
  3. Manuscript Revised: 3 APR 2010
  4. Manuscript Received: 3 FEB 2010

Funded by

  • Program for New Century Excellent Talents in University
  • National Science Foundation of China. Grant Number: 20636010
  • National Basic Research Program of China. Grant Number: 2007CB714302
  • 863 program. Grant Number: 2009AA033001

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Keywords:

  • amphiphilic poly(aspartic acid);
  • carbon nanotubes;
  • interaction;
  • functionalization

Abstract

A new method to functionalize multiwalled carbon nanotubes (MWNTs) with amphiphilic poly(aspartic acid) was investigated. The amphiphilic polymer (PASP-C16) was synthesized by thermal condensation and aminolysis by hexadecylamine, followed by hydrolysis of the remaining succinimide units in the polymer backbone. The functionalization of MWNTs was achieved by physical adsorption of the biopolymer onto the surfaces of MWNTs. Ultraviolet-visible (UV-vis) spectra showed that the functionalized MWNTs had a good aqueous dispersity and solubility. The interaction of PASP-C16 with MWNTs was investigated by analyzing X-ray diffraction (XRD) patterns, circular dichroism (CD), spectra and high-resolution transmission electron microscopy (HRTEM). From the XRD patterns, it can be known that the aggregate of PASP-C16 due to intermolecular interaction between hexadecyl chains has been reduced when the polymer interacting with MWNTs. CD spectra indicated that the interaction of hexadecyl chains of PASP-C16 with the wall of MWNTs is the major interaction between PASP-C16 and MWNTs, and MWNTs were covered by the poly(aspatic acid) backbone. © 2010 American Institute of Chemical Engineers AIChE J, 2011

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