CUED Publications database

Azobenzene-based supramolecular polymers for processing MWCNTs.

Maggini, L and Marangoni, T and Georges, B and Malicka, JM and Yoosaf, K and Minoia, A and Lazzaroni, R and Armaroli, N and Bonifazi, D (2013) Azobenzene-based supramolecular polymers for processing MWCNTs. Nanoscale, 5. pp. 634-645.

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Abstract

Photothermally responsive supramolecular polymers containing azobenzene units have been synthesised and employed as dispersants for multi-walled carbon nanotubes (MWCNTs) in organic solvents. Upon triggering the trans-cis isomerisation of the supramolecular polymer intermolecular interactions between MWCNTs and the polymer are established, reversibly affecting the suspensions of the MWCNTs, either favouring it (by heating, i.e. cis→trans isomerisation) or inducing the CNTs' precipitation (upon irradiation, trans→cis isomerisation). Taking advantage of the chromophoric properties of the molecular subunits, the solubilisation/precipitation processes have been monitored by UV-Vis absorption spectroscopy. The structural properties of the resulting MWCNT-polymer hybrid materials have been thoroughly investigated via thermogravimetric analysis (TGA), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM) and atomic force microscopy (AFM) and modelled with molecular dynamics simulations.

Item Type: Article
Uncontrolled Keywords: Azo Compounds Hot Temperature Kinetics Materials Testing Microscopy, Atomic Force Microscopy, Electron, Transmission Models, Chemical Molecular Conformation Nanotubes, Carbon Organic Chemicals Photochemistry Polymers Solubility Solvents Surface Properties Thermogravimetry Ultraviolet Rays X-Rays
Subjects: UNSPECIFIED
Divisions: Div E > Manufacturing Systems
Depositing User: Cron Job
Date Deposited: 17 Jul 2017 19:23
Last Modified: 21 Sep 2017 01:40
DOI: