Featured Research

from universities, journals, and other organizations

Nanotube-Laced Epoxy: Three Times Harder, Far Better At Conducting Heat

Date:
April 16, 2002
Source:
University Of Pennsylvania
Summary:
Ever since carbon nanotubes debuted a decade ago, scientists have touted the strength attainable by ordinary materials reinforced with these strands of pure carbon. Subsequent studies have added superior heat-conducting properties to the futuristic fibers’ portfolio of benefits.

PHILADELPHIA – Ever since carbon nanotubes debuted a decade ago, scientists have touted the strength attainable by ordinary materials reinforced with these strands of pure carbon. Subsequent studies have added superior heat-conducting properties to the futuristic fibers’ portfolio of benefits.

Related Articles


Now this longstanding promise of superfortified heat-conducting materials has become a reality. University of Pennsylvania scientists have determined that adding a relatively small number of carbon nanotubes to epoxy yields a compound three-and-a-half times as hard and far better at heat conductance than the product found in hardware stores.

The researchers report their successful tinkering with the commonplace adhesive in the April 15 issue of the journal Applied Physics Letters. Led by Penn physicist Alan T. "Charlie" Johnson, the team created a composite of 95 to 99 percent common epoxy mixed with 1 to 5 percent carbon nanotubes, filaments of carbon less than one-ten-thousandth the width of a human hair.

"These findings add considerably to carbon nanotubes’ luster as possible additives to a variety of materials," said Johnson, an associate professor of physics and astronomy at Penn. "In addition to adhesives such as epoxy, we are looking at nanotube-based greases that might be used to carry heat away from electronic chips."

Johnson’s group determined that epoxy doped with nanotubes showed a 125 percent increase in thermal conductivity at room temperature.

"This is the first published report of enhanced thermal conductivity in a material owing to the addition of carbon nanotubes and the first demonstration of simultaneous thermal and mechanical enhancement of a real-world material," Johnson said.

For some time, scientists have been intrigued by nanotubes, pure carbon cylinders with walls just one atom thick. First created by zapping graphite with lasers, the structures have become one of the marvels of the nanotechnology world: 100 times as strong as steel and capable of far greater electrical conductivity than other carbon-based materials. Researchers have envisioned the miniature strands bulking up brittle plastics and conducting current in ever-smaller electrical circuits, among other possibilities, and have made significant strides in the large-scale synthesis of nanotubes.

The Applied Physics Letters paper builds upon a paper published in 2000 in the journal Science. In that paper, Johnson and Penn materials scientist John E. Fischer identified carbon nanotubes as the best heat-conducting material ever recorded, the first suggestion that the exotic strands might someday find applications as miniature heat conduits in a host of devices and materials.

Epoxy is an attractive target for fortification with carbon nanotubes, Johnson said, because it’s relatively easy to mix the minuscule filaments into it, and there are clear industrial benefits in a harder, better-conducting epoxy. Other scientists have attempted to fortify epoxy with carbon nanotubes, but Johnson’s group succeeded in dispersing the nanotubes more evenly.

###

Johnson was joined in the Applied Physics Letters paper by Fischer, of Penn’s Department of Materials Science and Engineering; Michael J. Biercuk of Harvard University; Marc C. Llaguno and Marko Radosavljevic of IBM’s T.J. Watson Research Center; and Jerome K. Hyun of Columbia University. The work was funded by the National Science Foundation, the U.S. Department of Energy and Penn’s Laboratory for Research on the Structure of Matter.

Penn is seeking corporate partners and investors to commercialize this patented technology. Additional information is available by contacting Gennaro Gama in Penn’s Center for Technology Transfer at 215-898-9273.


Story Source:

The above story is based on materials provided by University Of Pennsylvania. Note: Materials may be edited for content and length.


Cite This Page:

University Of Pennsylvania. "Nanotube-Laced Epoxy: Three Times Harder, Far Better At Conducting Heat." ScienceDaily. ScienceDaily, 16 April 2002. <www.sciencedaily.com/releases/2002/04/020416073536.htm>.
University Of Pennsylvania. (2002, April 16). Nanotube-Laced Epoxy: Three Times Harder, Far Better At Conducting Heat. ScienceDaily. Retrieved December 19, 2014 from www.sciencedaily.com/releases/2002/04/020416073536.htm
University Of Pennsylvania. "Nanotube-Laced Epoxy: Three Times Harder, Far Better At Conducting Heat." ScienceDaily. www.sciencedaily.com/releases/2002/04/020416073536.htm (accessed December 19, 2014).

Share This


More From ScienceDaily



More Matter & Energy News

Friday, December 19, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Navy Unveils Robot Fish

Navy Unveils Robot Fish

Reuters - Light News Video Online (Dec. 18, 2014) The U.S. Navy unveils an underwater device that mimics the movement of a fish. Tara Cleary reports. Video provided by Reuters
Powered by NewsLook.com
3D Printed Cookies Just in Time for Christmas

3D Printed Cookies Just in Time for Christmas

Reuters - Innovations Video Online (Dec. 18, 2014) A tech company in Spain have combined technology with cuisine to develop the 'Foodini', a 3D printer designed to print the perfect cookie for Santa. Ben Gruber reports. Video provided by Reuters
Powered by NewsLook.com
First Etihad Superjumbo Flight in December

First Etihad Superjumbo Flight in December

AFP (Dec. 18, 2014) The first flight of Etihad Airways' long-awaited Airbus A380 superjumbo will take place later in December, the Abu Dhabi carrier said Thursday, also announcing its first Boeing 787 Dreamliner route. Duration: 01:09 Video provided by AFP
Powered by NewsLook.com
Ford Expands Air Bag Recall Nationwide

Ford Expands Air Bag Recall Nationwide

Newsy (Dec. 18, 2014) The automaker added 447,000 vehicles to its recall list, bringing the total to more than 502,000. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Space & Time

Matter & Energy

Computers & Math

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins