Polyaniline: Conducting and AntiCorrosive Properties

1
Polyaniline Conducting and Anti-Corrosive
Properties

• Journal Club
• James Cruise

2
Background Information

• The purpose of applying an organic polymer
  coating onto metal is to prevent corrosion.
• Corrosion is the result of electrochemistry
  between a metal and an oxidant (Air, Oxygen,
  Water.)
• Corrosion affects all areas of industry from
  aviation to microchips.
• Polymers are cheap conductors.

3
Anti-Corrosion Methods Theories

• Modern technology depends on large scale archaic
  paint methods.
• Current alloys arent cost effective.

• Prospective technology is focused on
  electrochemical reactions between conductive
  polymer coatings and substrate metals.
• Polyaniline, PANI, an Organic Metal, is
  currently more effective than conventional
  anti-corrosion systems.

4
Oxidation States and Acid Base Behavior of
Polyaniline
5
Properties of Polyaniline

• Polyanilines electrical properties can be
  reversibly controlled by charge-transfer doping
  and protonation.
• Polyaniline is environmentally stable and inert
  (noble) where stainless steel is corroded.
• Polyaniline is applicable to electrical,
  electrochemical, and optical applications.
  Polyaniline is currently used in cell phones and
  calculators, and other LCD technology.

6
Conclusions

• Polyaniline and Polyphenylene Ether are coatings
  undergoing research and refinement that will
  enhance industry and the quality of life.
• Conductive Polymer Science is still in its
  infancy. The 2000 Nobel Prize for chemistry was
  awarded to Shirakawa, Heegen, and McDiarmid, for
  the discovery and development of conductive
  polymers

7
Bibliography

• DeBerry, D.W., 1985, Modification of the
  Electrochemical and Corrosion Behavior of
  Stainless Steels with an Electroactive Coating.
• Beard, B.C, Spellane, P., 1997, XPS Evidence of
  Redox Chemistry between Cold Rolled Steel and
  Polyaniline.
• http//people.clemson.edu/hzengin/ResearchProject
  s.htm Studies of Inherently Conductive Polymer
  Polyaniline Synthesis, Characterization, and
  Solution Properties