Water‐dispersible polyaniline‐carbon nanotubes composites with interface covalent bond and their enhanced electrochemical and electrochromic properties

Abstract

The water‐dispersible electrochormic nanocomposites, polyaniline (PANI) connected multi‐walled carbon nanotubes (MWCNTs) by covalent bond were synthesized through a grafting polymerization process of aniline monomer with functionalized MWCNTs. N,N′‐dicyclohexylcarbodiimide (DCC) was used as dehydrant for functionalization process of MWCNTs with p‐phenylenediamine (PPD). The transmission electron microscope (TEM), scanning electron microscopy (SEM), thermal gravimetric analysis (TGA), and Fourier transform infrared spectroscopy (FT‐IR) were used to study the morphologies, thermal stabilities and chemical structures of the nanocomposites, respectively. The UV‐vis absorbance spectra and cyclic voltammetry behaviors of nanocomposites were tested by UV‐vis spectrometer and electrochemical workstation, respectively. It is shown show that PANI‐MWCNTs nanocomposites not only exhibit good water solubility, but also exhibit excellent film‐forming properties. The results confirm that the π‐π interactions and interfacial covalent bond between PANI and MWCNTs endow PANI‐MWCNTs excellent electrochemical and electrochromic properties. The conductive network composed of PANI and MWCNTs can significantly improve the ion transports, electron conduct and electrochromic performance of PANI. The PANI‐MWCNTs‐0.6% nanocomposite film shows highest optical contrast value (0.78) and shortest response time (3.8 seconds for coloring and 3.2 seconds for bleaching) among neat PANI and PANI‐MWCNTs nanocomposites.

High specific surface area triphenylamine-based covalent organic framework/polyaniline nanocomposites for supercapacitor application

“…Figure 3(a) exhibits the FTIR vibrational peaks of PANI at 1570 cm −1 , 1490 cm −1 and 1240 cm −1 . 29,30 The peaks at 1570 cm −1 and 1490 cm −1 correspond to the stretching vibration of C-C in the quinoid structure and the stretching vibration of C = C in the benzene ring structure, respectively. 31 The band at 1240 cm −1 is due to stretching vibration of C-N + in the polarized structure of PANI.…”

Chemiresistor sensor using elastomer‐functionalized carbon nanotube nanocomposites for the detection of gasoline spills

“…It has been known that a polymer functionalization of CNT is an effective strategy for not only providing uniform dispersion and distribution but also suppressing the aggregation of CNTs. There have been known two approaches for the polymer functionalization of CNT, which are “grafting‐from” [ 8 ] and “grafting‐to,” [ 9 ] and they are different from each other depending on how to chemically bond polymer chains to the surface of CNT. In “grafting‐from” method, polymer chains are grown from the CNT surface by an in situ polymerization of the corresponding monomer in the presence of CNT having a specific initiator covalently bonded to its surface.…”

Influence of CeO2as dispersoid in blend poly(styrene‐co‐methylmethacrylate) as electrolyte for lithium‐ion battery

“…have been extensively used for the synthesis of solid/gel polymers or nanocomposite polymer electrolytes. Among these, solution casting is a simple and most efficient technique to develop porous polymer electrolytes 15–17 …”