Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Producing "synthetic metals" with radiation

07.04.2008
This week, UPM unveiled their latest research at the World's Largest Market-Place for Inventions in Geneva. This research is on a technique to transform non-conducting organic polymers into electricity conducting "synthetic metals" using radiation, which can be used for artificial muscles, antistatic clothing, rechargeable batteries and more

This week, University Putra Malaysia's team unveiled their latest inventions and products at the 34th International Exhibition of Inventions, New Techniques and Products in Geneva (April 2-6, 2008), also known as the World's Largest Market-Place for Inventions.

This research is on a technique to transform non-conducting organic polymers into electricity conducting "synthetic metals" using radiation. These "synthetic metals" can be used for electromagnetic shielding, artificial muscles, active electronic devices, antistatic clothing, rechargeable batteries, ion exchange membranes, electrical display, chemical and biochemical sensors, electrochemical actuators, switches, and molecular electronics.

TITLE: Polymerization of PVA/PANI Conducting Polymer Blends by Radiation Technique

RESEARCHERS: Elias Saion, Muhammed Ahmed Ali Omar, Azian Osman, Khrulzaman Mohd Dahlan, Taiman Kadni, Shahril Hashim.

Department of Physics
Faculty of Science
Universiti Putra Malaysia, 43400 UPM,
Serdang, Selangor, Malaysia.
Tel: +603-89466654
Email: elias@
Most of organic polymers are insulators. However, those with conjugated ƒà-electron backbones could be transformed into conducting polymers when they are treated with strong oxidizing or reducing agents. The pi-bonds are localized structural defects in the polymer chain known as polorons that allow conducting electricity. These ¡¥synthetic metals¡¦ have been attracted much attention from both fundamental scientific concepts and potential for new technology due to their excellent optical, electronic, and electrochemical properties. They offer a wide variety of new application including electromagnetic shielding, artificial muscles, active electronic devices, antistatic clothing, rechargeable batteries, ion exchange membranes, electrical display, chemical and biochemical sensors, electrochemical actuators, switches, and molecular electronics. Among these polymers, polyaniline (PANI) generates a special interest owing to its relative high conductivity and low cost, exhibit excellent environmental stability, and its polymerization is straightforward and proceeds with high yield. Polymerization of PANI is normally achieved by chemical doping process involving charge transfer through oxidation (p-type doping) or reduction (n-type doping) and by electrochemical doping process in which electrode supplies the redox charge to the conducting polymer, while ions diffuse into the conducting polymer from the electrolyte to compensate the electronic charge. We offer a new route for synthesizing PANI by radiation method through bond scission of Cl- ions and aniline radical from aniline hydrochloride (AniHCl) blended in polyvinyl alcohol (PVA). The PVA/AniHCl blend films were prepared by solvent casting in air. The influence of the 1.25-MeV gamma-ray dose and the polymerization kinetics were investigated by means of visible absorption spectroscopy, XRD, and conductivity measurements. The polymerization of PANI was evident as the blends change colour from white to dark green, peaking at the absorption band of 780 nm, which is the colour of PANI. There is a significant reduction in the peak intensity at the diffraction angle of 19.5o, as the dose increases to 50 kGy, indicating the crystalline phase of the blends has been transformed into the amorphous phase due to the polymerization of PANI. This allows an easy passage of electrical current through the blends as the conductivity increases rapidly from 1.0 x 10-6 S/cm at 0 Gy to 3.0 x 10-1 S/cm at 50 kGy due to increase number of polarons formed in PANI. This study reveals the possibility to develop PVA/PANI conducting polymer blends from PVA/AniHCl blends by using radiation technique.

Dr Nayan KANWAL | ResearchSEA
Further information:
http://www.inventions-geneva.ch/
http://www.putra.upm.edu.my
http://www.researchsea.com

More articles from Physics and Astronomy:

nachricht NASA's Fermi catches gamma-ray flashes from tropical storms
25.04.2017 | NASA/Goddard Space Flight Center

nachricht DGIST develops 20 times faster biosensor
24.04.2017 | DGIST (Daegu Gyeongbuk Institute of Science and Technology)

All articles from Physics and Astronomy >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Making lightweight construction suitable for series production

More and more automobile companies are focusing on body parts made of carbon fiber reinforced plastics (CFRP). However, manufacturing and repair costs must be further reduced in order to make CFRP more economical in use. Together with the Volkswagen AG and five other partners in the project HolQueSt 3D, the Laser Zentrum Hannover e.V. (LZH) has developed laser processes for the automatic trimming, drilling and repair of three-dimensional components.

Automated manufacturing processes are the basis for ultimately establishing the series production of CFRP components. In the project HolQueSt 3D, the LZH has...

Im Focus: Wonder material? Novel nanotube structure strengthens thin films for flexible electronics

Reflecting the structure of composites found in nature and the ancient world, researchers at the University of Illinois at Urbana-Champaign have synthesized thin carbon nanotube (CNT) textiles that exhibit both high electrical conductivity and a level of toughness that is about fifty times higher than copper films, currently used in electronics.

"The structural robustness of thin metal films has significant importance for the reliable operation of smart skin and flexible electronics including...

Im Focus: Deep inside Galaxy M87

The nearby, giant radio galaxy M87 hosts a supermassive black hole (BH) and is well-known for its bright jet dominating the spectrum over ten orders of magnitude in frequency. Due to its proximity, jet prominence, and the large black hole mass, M87 is the best laboratory for investigating the formation, acceleration, and collimation of relativistic jets. A research team led by Silke Britzen from the Max Planck Institute for Radio Astronomy in Bonn, Germany, has found strong indication for turbulent processes connecting the accretion disk and the jet of that galaxy providing insights into the longstanding problem of the origin of astrophysical jets.

Supermassive black holes form some of the most enigmatic phenomena in astrophysics. Their enormous energy output is supposed to be generated by the...

Im Focus: A Quantum Low Pass for Photons

Physicists in Garching observe novel quantum effect that limits the number of emitted photons.

The probability to find a certain number of photons inside a laser pulse usually corresponds to a classical distribution of independent events, the so-called...

Im Focus: Microprocessors based on a layer of just three atoms

Microprocessors based on atomically thin materials hold the promise of the evolution of traditional processors as well as new applications in the field of flexible electronics. Now, a TU Wien research team led by Thomas Müller has made a breakthrough in this field as part of an ongoing research project.

Two-dimensional materials, or 2D materials for short, are extremely versatile, although – or often more precisely because – they are made up of just one or a...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Expert meeting “Health Business Connect” will connect international medical technology companies

20.04.2017 | Event News

Wenn der Computer das Gehirn austrickst

18.04.2017 | Event News

7th International Conference on Crystalline Silicon Photovoltaics in Freiburg on April 3-5, 2017

03.04.2017 | Event News

 
Latest News

NASA's Fermi catches gamma-ray flashes from tropical storms

25.04.2017 | Physics and Astronomy

Researchers invent process to make sustainable rubber, plastics

25.04.2017 | Materials Sciences

Transfecting cells gently – the LZH presents a GNOME prototype at the Labvolution 2017

25.04.2017 | Life Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>