Content uploaded by Katrin Idla
Author content
All content in this area was uploaded by Katrin Idla on Jan 24, 2018
Content may be subject to copyright.
AN XPS AND SIMS STUDY OF ADHESIVE POLYPYRROLE FILM ON CHEMICALLY
OXIDIZED TITANIUM.
K. Idla1, L.-S. Johanson2, J. Campbell2 and O. Inganäs3
1 Laboratory of Physical Chemistry, Tallinn Technical University, Ehitajate tee 5,
19086 Tallinn, ESTONIA. E-mail: idla@edu.ttu.ee
2 Centre for Chemical Analysis, Helsinki University of Technology, P.O.Box 6100,
FIN-02015 Espoo, FINLAND
3 Laboratory of Applied Physics, Dept. of Physics, Linköping University,
S-581 83 Linköping, SWEDEN
The good adhesion of electrically conductive polymers on metal is an
important property in several applications, for example polypyrrole (Ppy) can
be used for anti-static or anti-corrosion coatings, batteries, “artificial muscles”,
etc. We have developed a procedure for the preparation of very adhesive Ppy
film by using chemically treated thin titanium interlayer [1]. As a substrate
aluminium and silicon wafer have been examined but the material may be
different because the titanium interlayer between the substrate and Ppy
achieves adhesion of the polymer.
In this study, we have performed surface studies of electrochemically
deposited Ppy film on titanium and chemically oxidised titanium. We present
the surface and interface characterisation of these systems. The main interest is
focused on the changes of titanium surface generated by chemical oxidation.
With these changes we try to explain the very good adhesion. The changes
have been studied by analysing the polymer film and the substrate step-by-
step, in the various states of the preparation process.
The results show substantial changes in the chemical state of titanium after
the chemical treatment. Titanium oxide(s) and hydroxide are formed on the
surface. The chemical composition of polymer slightly changes with growing
the thickness of the film. The possibility of different mechanisms of adhesion
will be discussed.
[1] K. Idla, O. Inganäs and M. Strandberg, submitted to Electrochimica Acta