Redox Responsive Release of Hydrophobic Self-Healing Agents from Polyaniline Capsules
journal contributionposted on 16.12.2015, 23:35 by Li-Ping Lv, Yi Zhao, Nicole Vilbrandt, Markus Gallei, Ashokanand Vimalanandan, Michael Rohwerder, Katharina Landfester, Daniel Crespy
Redox-responsive nanocapsules consisting of conductive polyaniline and polypyrrole shells were successfully synthesized by using the interface of miniemulsion droplets as a template for oxidative polymerizations. The redox properties of the capsules were investigated by optical spectroscopies, electron microscopy, and cyclic voltammetry. Self-healing (SH) chemicals such as diglycidyl ether or dicarboxylic acid terminated polydimethylsiloxane (PDMS-DE or PDMS-DC) were encapsulated into the nanocapsules during the miniemulsion process and their redox-responsive release was monitored by 1H NMR spectroscopy. The polyaniline capsules exhibited delayed release under oxidation and rapid release under reduction, which make them promising candidates for anticorrosion applications.
Read the peer-reviewed publication
1 H NMR spectroscopyconductive polyanilineredox propertiesminiemulsion dropletscyclic voltammetryanticorrosion applicationsRedox Responsive Releasepolypyrrole shellsnanocapsulereleaseelectron microscopypolyaniline capsulesdiglycidyl etheroxidative polymerizationsSHdicarboxylic acidminiemulsion process