Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Plastic with changeable conductivity developed by chemical engineer

11.04.2007
Dr. Yueh-Lin (Lynn) Loo at The University of Texas at Austin has modified a plastic so its ability to carry an electrical current can be altered during manufacturing to meet the needs of future electronic devices.

Loo, an assistant professor of chemical engineering, studies the plastic called polyaniline because it could serve as flexible, inexpensive wiring in future products such as military camouflage that changes colors, foldable electronic displays and medical sensors.

By combining polyaniline with a chemical that gives it conductivity, Loo discovered she could increase the plastic’s conductivity one- to six-fold based on the version of the chemical added. The results involving the chemical polymer acid were published in the April 7 issue of the Journal of Materials Chemistry.

Chemically altered polyaniline has several advantages over the more commonly used metals, like gold and copper, in devices other than computers. For example, Loo’s previous research has demonstrated that “doped” polyaniline can be manufactured in solution at room temperatures and without vacuum chambers. Producing metal-based wires requires special manufacturing conditions in addition to the high cost of the metals.

Since Loo’s laboratory submitted their research to the Journal of Materials Chemistry, they have developed a version of polyaniline whose conductivity is 10 times higher than before. However, that level of electrical conductivity still doesn’t rival that of copper, which is used to produce high-speed interconnections.

That effort will be based on the greater understanding Loo has gained of the polyaniline/polymer acid described in the Journal of Materials Chemistry article. In the article, graduate student Joung Eun Yoo and other members of Loo’s laboratory began determining how higher-mass versions of polymer acid improve the plastic’s conductivity when the two materials are combined. So far, they have learned that the higher mass acids attach to the plastic in longer chains, and induce a less-ordered internal structure (crystallinity) within the plastic.

“Understanding how the structure of this polyaniline material changes when its conductivity changes will be crucial for selecting the right material for different consumer applications,” Loo said.

She noted that the ability of the plastic to change colors depending on whether it was conductive or not could be especially useful.

“Its general versatility could lead to a variety of new consumer products in upcoming years,” she said.

Loo has begun collaborating with Research Professor Adam Heller at the university to investigate using polyaniline as part of a sensor material in medical devices. Heller previously developed two commercially available devices to monitor glucose levels in people with diabetes.

Loo’s latest published research was funded by a Young Investigator Award she received in 2005 from the Arnold and Mabel Beckman Foundation, and by a Dupont Young Professor Grant. Loo’s innovative research also has led to her selection in 2004 as one of Technology Review's Top 100 Young Investigators, the same year she received a National Science Foundation CAREER Award.

Barbra Rodriguez | EurekAlert!
Further information:
http://www.engr.utexas.edu

More articles from Materials Sciences:

nachricht Epoxy compound gets a graphene bump
14.11.2018 | Rice University

nachricht Automated adhesive film placement and stringer integration for aircraft manufacture
15.11.2018 | Fraunhofer IFAM

All articles from Materials Sciences >>>

The most recent press releases about innovation >>>

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

Im Focus: UNH scientists help provide first-ever views of elusive energy explosion

Researchers at the University of New Hampshire have captured a difficult-to-view singular event involving "magnetic reconnection"--the process by which sparse particles and energy around Earth collide producing a quick but mighty explosion--in the Earth's magnetotail, the magnetic environment that trails behind the planet.

Magnetic reconnection has remained a bit of a mystery to scientists. They know it exists and have documented the effects that the energy explosions can...

Im Focus: A Chip with Blood Vessels

Biochips have been developed at TU Wien (Vienna), on which tissue can be produced and examined. This allows supplying the tissue with different substances in a very controlled way.

Cultivating human cells in the Petri dish is not a big challenge today. Producing artificial tissue, however, permeated by fine blood vessels, is a much more...

Im Focus: A Leap Into Quantum Technology

Faster and secure data communication: This is the goal of a new joint project involving physicists from the University of Würzburg. The German Federal Ministry of Education and Research funds the project with 14.8 million euro.

In our digital world data security and secure communication are becoming more and more important. Quantum communication is a promising approach to achieve...

Im Focus: Research icebreaker Polarstern begins the Antarctic season

What does it look like below the ice shelf of the calved massive iceberg A68?

On Saturday, 10 November 2018, the research icebreaker Polarstern will leave its homeport of Bremerhaven, bound for Cape Town, South Africa.

Im Focus: Penn engineers develop ultrathin, ultralight 'nanocardboard'

When choosing materials to make something, trade-offs need to be made between a host of properties, such as thickness, stiffness and weight. Depending on the application in question, finding just the right balance is the difference between success and failure

Now, a team of Penn Engineers has demonstrated a new material they call "nanocardboard," an ultrathin equivalent of corrugated paper cardboard. A square...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

“3rd Conference on Laser Polishing – LaP 2018” Attracts International Experts and Users

09.11.2018 | Event News

On the brain’s ability to find the right direction

06.11.2018 | Event News

European Space Talks: Weltraumschrott – eine Gefahr für die Gesellschaft?

23.10.2018 | Event News

 
Latest News

Purdue cancer identity technology makes it easier to find a tumor's 'address'

16.11.2018 | Health and Medicine

Good preparation is half the digestion

16.11.2018 | Life Sciences

Microscope measures muscle weakness

16.11.2018 | Life Sciences

VideoLinks
Science & Research
Overview of more VideoLinks >>>