Nanotechnology Now

Our NanoNews Digest Sponsors



Heifer International

Wikipedia Affiliate Button


android tablet pc

Home > Press > Mighty Nanofibers Could Mean Stronger, Lighter Materials

Abstract:
Bigger may be better, but tinier is stronger. So say scientists at the Technion-Israel Institute of Technology, who have shown that tiny polymer nanofibers become much stronger when their diameters shrink below a certain size. Their research could make possible stronger fabrics that use less material.

Mighty Nanofibers Could Mean Stronger, Lighter Materials

New York & Israel | Posted on January 31st, 2007

Bigger may be better, but tinier is stronger. So say scientists at the Technion-Israel Institute of Technology, who have shown that tiny polymer nanofibers become much stronger when their diameters shrink below a certain size. Their research, published in the January issue of Nature Nanotechnology, could make possible stronger fabrics that use less material.

Professor Eyal Zussman and Dr. Oleg Gendelman of the Faculty of Mechanical Engineering are the first to propose an explanation for this surprising behavior in very thin fibers.

When the researchers measured the mechanical properties of nylon nanofibers, they found the critical diameter - the diameter at which the nylon nanofiber abruptly becomes stiffer—to be approximately 500 nanometers (about as thick as a spider web strand, or 100 times thinner than a human hair). They explained the abrupt increase in stiffness by considering the molecular structure inside the polymer fiber.

According to Zussman, each polymer nanofiber is made up of countless large, complex molecules called macromolecules. Macromolecules try to align themselves when the fiber is forming, but since they are so long and tangled, it is impossible for them to sort themselves out and align uniformly throughout the entire nanofiber. As a result, the nanofiber is a patchwork of differently oriented macromolecule regions. The researchers calculated the size of these regions to be roughly the same as the critical diameter of the nanofiber (the diameter at which the fiber stiffness abruptly increases).

"When the diameter of the fiber is much larger than the size of the oriented regions, the macromolecules can move relative to one another," says Zussman. "But as the diameter of the fiber shrinks, these oriented regions become constrained and the macromolecules are unable to easily move relative to one another. So they become stuck against each other like cars in a traffic jam, and the resulting nanofiber is much stiffer."

Although Professor Zussman and his colleagues focused on a certain type of nanofiber, they say their basic physical idea will help scientists understand the novel physical properties of a wide range of nanofibers and other nanostructures. Practical applications include lighter protective vests and stronger fabrics.

Also participating in the research, which is part of activities of the Russell Berrie Nanotechnology Institute at the Technion, were Dr. Arkadii Arinstein and graduate student Michael Burman.

####

About American Technion Society
Based in New York City, the American Technion Society is the leading American organization supporting higher education in Israel, with 17 offices around the country.

The Technion-Israel Institute of Technology is Israel's leading science and technology university. Home to the country’s winners of the Nobel Prize in science, it commands a worldwide reputation for its pioneering work in nanotechnology, computer science, biotechnology, water-resource management, materials engineering, aerospace and medicine. The majority of the founders and managers of Israel's high-tech companies are alumni.

For more information, please click here

Contacts:
Kevin Hattori

212.407.6319

Copyright © Newswise

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related News Press

Announcements

'Stealth' nanoparticles could improve cancer vaccines October 1st, 2014

Stressed Out: Research Sheds New Light on Why Rechargeable Batteries Fail October 1st, 2014

New Absorber Will Lead to Better Biosensor: Biosensors are more sensitive and able to detect smaller changes in the environment October 1st, 2014

Graphene chips are close to significant commercialization October 1st, 2014

Military

Platinum meets its match in quantum dots from coal: Rice University's cheap hybrid outperforms rare metal as fuel-cell catalyst October 1st, 2014

$18-million NSF investment aims to take flat materials to new heights: 2-D alternatives to graphene may enable exciting advances in electronics, photonics, sensors and other applications October 1st, 2014

UT Arlington researchers develop transparent nanoscintillators for radiation detection for medical safety and homeland security September 29th, 2014

'Pixel' engineered electronics have growth potential: Rice, Oak Ridge, Vanderbilt, Penn scientists lead creation of atom-scale semiconducting composites September 29th, 2014

Textiles/Clothing

Teijin Aramid’s carbon nanotube fibers awarded with Paul Schlack prize: New generation super fibers bring wave of innovations to fiber market September 25th, 2014

Excitonic Dark States Shed Light on TMDC Atomic Layers: Berkeley Lab Discovery Holds Promise for Nanoelectronic and Photonic Applications September 11th, 2014

Silver Replaced with Copper Nanoparticles to Produce Antibacterial Fabrics August 25th, 2014

New Nanosorbent Helps Elimination of Colorants from Textile Wastewater August 25th, 2014

Human Interest/Art

Japanese gold leaf artists worked on a nano-scale: Study demonstrates X-ray fluorescence spectroscopy is a non-destructive way to date artwork July 3rd, 2014

Harry Potter-style invisibility cloaks: A real possibility next Christmas? Forget socks and shaving foam, the big kids of tomorrow want an invisible cloak for Christmas December 19th, 2013

Chicago Awareness Organization First Not-for-Profit to Sponsor Dog Training to Detect Ovarian Cancer Odorants December 12th, 2013

ZEISS Microscopes used to create images for Art Exhibit at Midway Airport: Art of Science: Images from the Institute for Genomic Biology October 25th, 2013

NanoNews-Digest
The latest news from around the world, FREE



  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoTech-Transfer
University Technology Transfer & Patents
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More














ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project







© Copyright 1999-2014 7th Wave, Inc. All Rights Reserved PRIVACY POLICY :: CONTACT US :: STATS :: SITE MAP :: ADVERTISE