Conducting Polymer Colloids and Nanofilms
IUPAC Projects
Conducting Polymer Colloids and Nanofilms
Conducting polymers, polyaniline being a typical example, are the object of numerous studies because of their scientific challenge and potential applications. These proposed uses range from micro-electronics, sensors, electronic noses, electromagnetic shielding, and military camouflage, to intelligent materials and anti-corrosion protection. The results of an IUPAC project on the preparation of polyaniline have been recently reported in Pure and Applied Chemistry74, 857-867 (2002); see highlights in this CI issue.
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| Polyaniline (PANI) exists in a variety of forms that differ in chemical and physical properties; the most common green protonated emeraldine has conductivity on a semiconductor level of the order of 1-10 S cm-1, many orders of magnitude higher than that of common polymers (<10-9 S cm-1) but lower than that of typical metals (>104 S cm-1). |
While the synthesis of many conducting polymers is easy, their poor processibility presents a serious obstacle to application. A new IUPAC project (#2002-019-1-400) addresses this problem by studying two types of processible forms, polyaniline colloids and in-situ-polymerized polyaniline nanofilms. The colloids are produced during the oxidation of aniline with ammonium peroxydisulfate in acidic aqueous medium in the presence of a suitable polymeric stabilizer; polyaniline films grow under reaction conditions of this kind on virtually any surface or interface. The nanofilms are of particular interest because of the brush-like ordering of polymer chains in them.
Members of the task-group from six countries will follow the same preparative protocol in various laboratories, and the properties of the resulting materials will be compared at the international level. For the colloidal forms, the particle size and polydispersity determined by dynamic light scattering will be the main criterion. The films will be characterized with respect to their thickness, assessed by optical absorption measurements after calibration. The results of the project will contribute to the development of reproducible procedures for forming conducting polymers. Various macroscopic and microscopic substrates coated with conducting polymer overlayer can find uses in analytical chemistry, separation science, the catalysis of organic reactions, conducting composite materials and in the development of micro-electronics.
Jaroslav Stejskal <stejskal@imc.cas.cz>
© 2014 by Walter de Gruyter GmbH & Co.
Articles in the same Issue
- Contents
- Balancing Sources and Uses
- A Glance Into the Future
- The Special Topics Project
- Accomplishments During the Past Decade and Relationships With Industry
- Candid Chemistry
- IUPAC Representative’s Report on the 34th Codex Committee Session
- Young Chemists to the 39th IUPAC Congress, Ottawa, August 2003
- Chemical Education International
- The “Orange Book” Online
- IUPAC–Empfehlungen
- Chemical Actinometry
- Conducting Polymer Colloids and Nanofilms
- Information Essential for Characterizing a Flow-Based Analytical System (IUPAC Technical Report)
- Sulfate-Sensing Electrodes. The Lead- Amalgam/Lead-Sulfate Electrode (IUPAC Technical Report)
- Future Requirements In the Characterization of Continuous Fiber Reinforced Polymeric Composites (IUPAC Technical Report)
- Nomenclature for the C60-Ih and C70-D5h(6) Fullerenes (IUPAC Recommendations 2002)
- Molecular Basis of Biodiversity, Conservation, and Sustained Innovative Utilization (IUPAC Technical Report)
- Naming of New Elements (IUPAC Recommendations 2002)
- “Heavy Metals”–A Meaningless Term? (IUPAC Technical Report)
- Phane Nomenclature. Part II. Modification of the Degree of Hydrogenation and Substitution Derivatives of Phane Parent Hydrides (IUPAC Recommendations 2002)
- Harmonized Guidelines for Single- Laboratory Validation of Methods of Analysis (IUPAC Technical Report)
- Polyaniline. Preparation of a Conducting Polymer (IUPAC Technical Report)
- Studies on Biodegradable Poly[hexano-6- lactone] Fibers. Part 3. Enzymatic Degradation in Vitro (IUPAC Technical Report)
- Free-Radical Polymerization: Kinetics and Mechanism
- C2+ Nitroalkanes With Water or Organic Solvents: Binary and Multicomponent Systems
- Advanced Organic Chemistry Part A: Structure and Mechanisms Part B: Reactions and Synthesis
- Modern Coordination Chemistry–The Legacy of Joseph Chatt
- Biodiversity
- Macromolecules and Materials Science
- Nuclear Analytical Techniques in the Life Sciences
- Prohibiting Chemical Weapons
- Rejuvenating the Learning and Teaching of Chemistry 30 November–4 December 2002, Melbourne, Australia
- 4th Florida Heterocyclic Conference 10–12 March 2003, Gainesville, Florida, USA
- 12th IUPAC International Symposium on Organo-Metallic Chemistry (OMCOS-12) 6–10 July 2003, Toronto, Canada
- Calendar of IUPAC Sponsored Conferences
Articles in the same Issue
- Contents
- Balancing Sources and Uses
- A Glance Into the Future
- The Special Topics Project
- Accomplishments During the Past Decade and Relationships With Industry
- Candid Chemistry
- IUPAC Representative’s Report on the 34th Codex Committee Session
- Young Chemists to the 39th IUPAC Congress, Ottawa, August 2003
- Chemical Education International
- The “Orange Book” Online
- IUPAC–Empfehlungen
- Chemical Actinometry
- Conducting Polymer Colloids and Nanofilms
- Information Essential for Characterizing a Flow-Based Analytical System (IUPAC Technical Report)
- Sulfate-Sensing Electrodes. The Lead- Amalgam/Lead-Sulfate Electrode (IUPAC Technical Report)
- Future Requirements In the Characterization of Continuous Fiber Reinforced Polymeric Composites (IUPAC Technical Report)
- Nomenclature for the C60-Ih and C70-D5h(6) Fullerenes (IUPAC Recommendations 2002)
- Molecular Basis of Biodiversity, Conservation, and Sustained Innovative Utilization (IUPAC Technical Report)
- Naming of New Elements (IUPAC Recommendations 2002)
- “Heavy Metals”–A Meaningless Term? (IUPAC Technical Report)
- Phane Nomenclature. Part II. Modification of the Degree of Hydrogenation and Substitution Derivatives of Phane Parent Hydrides (IUPAC Recommendations 2002)
- Harmonized Guidelines for Single- Laboratory Validation of Methods of Analysis (IUPAC Technical Report)
- Polyaniline. Preparation of a Conducting Polymer (IUPAC Technical Report)
- Studies on Biodegradable Poly[hexano-6- lactone] Fibers. Part 3. Enzymatic Degradation in Vitro (IUPAC Technical Report)
- Free-Radical Polymerization: Kinetics and Mechanism
- C2+ Nitroalkanes With Water or Organic Solvents: Binary and Multicomponent Systems
- Advanced Organic Chemistry Part A: Structure and Mechanisms Part B: Reactions and Synthesis
- Modern Coordination Chemistry–The Legacy of Joseph Chatt
- Biodiversity
- Macromolecules and Materials Science
- Nuclear Analytical Techniques in the Life Sciences
- Prohibiting Chemical Weapons
- Rejuvenating the Learning and Teaching of Chemistry 30 November–4 December 2002, Melbourne, Australia
- 4th Florida Heterocyclic Conference 10–12 March 2003, Gainesville, Florida, USA
- 12th IUPAC International Symposium on Organo-Metallic Chemistry (OMCOS-12) 6–10 July 2003, Toronto, Canada
- Calendar of IUPAC Sponsored Conferences
