Nanotechnology Now

Our NanoNews Digest Sponsors





Heifer International

Wikipedia Affiliate Button


android tablet pc

Home > Press > Seeking the Next Kevlar: Penn Researchers Fine Tune Nanotube/Nylon Composite Using Carbon Spacers

Abstract:
A team of University of Pennsylvania and Rice University researchers have added a significant new step to the creation of materials fortified by single-walled carbon nanotubes, or SWNTs, resulting in a nylon polymer composite with greater strength and toughness and opening the door for researchers to broadly improve the mechanical properties of such composites at the molecular level.

Seeking the Next Kevlar: Penn Researchers Fine Tune Nanotube/Nylon Composite Using Carbon Spacers

Philadelphia, PA | Posted on April 4th, 2007

Starting with a method patented by engineers from Penn called interfacial polymerization, which evenly disperses carbon nanotubes throughout nylon, researchers have now fine tuned the composite material on a molecular level by introducing alkyl segments, or "carbon spacers." The carbon spacers act as linking segments, covalently bonding the nanotubes and nylon chains, improving both the toughness of the material and the strength. Previous attempts to create a carbon nanotube/nylon composite had resulted in a brittle material, a problem solved by the addition of these carbon spacers.

The resulting nanocomposites with the covalent bond exhibit as much as 160 percent higher modulus, 160 percent higher strength and 140 percent higher toughness.

"Nanotechnology is providing new composite materials with tunable mechanical properties," said Karen I. Winey, professor of materials science and engineering and also chemical and biomolecular engineering at Penn. "By adding covalently bonded carbon spacers to the filler-matrix interface in these composite, we have significantly improved their mechanical properties and perhaps demonstrated a broadly applicable approach to nanocomposite design."

The results, which could give scientists a new tool to customize nano-tube-laced materials to meet their particular needs, are reported by Winey and her colleagues online this week in the journal Nano Letters.

"Nanocomposites are likely to be more efficient methods for improving the mechanical, thermal and electrical properties of polymer than starting from scratch and synthesizing completely new ones," Winey said.

SWNTs are tubular-shaped molecules of carbon no wider than several nanometers. One nanometer is approximately 10 atoms in width; for comparison a single human hair is nearly 90,000 nanometers in diameter. Yet they are strong, light and show promise for advanced applications due to their mechanical, electrical and thermal properties. Nanotube-based composites have the potential to revolutionize fabrics, structural materials for aerospace, electrical and thermal conductors for energy applications, nano-biotechnology and other disciplines.

The study was conducted by Winey, as well as Mohammad Moniruzzaman of Penn's Department of Materials Science and Engineering and Jayanta Chattopadhyay and W. Edward Billups of the Department of Chemistry at Rice University.

The research was supported by the National Science Foundation and the Office of Naval Research.

####

For more information, please click here

Contacts:
Jordan Reese
215-573-6604

Copyright © University of Philadelphia

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

Nanotubes/Buckyballs

SouthWest NanoTechnologies Names NanoSperse as A SWeNT Certified Compounder July 29th, 2014

A new way to make microstructured surfaces: Method can produce strong, lightweight materials with specific surface properties July 29th, 2014

UCF Nanotech Spinout Developing Revolutionary Battery Technology: Power the Next Generation of Electronics with Carbon July 23rd, 2014

University of Houston researchers create new method to draw molecules from live cells: Technique using magnetic nanomaterials offers promise for diagnosis, gene therapy July 17th, 2014

Discoveries

Flexible Metamaterial Absorbers July 29th, 2014

Zenosense, Inc. July 29th, 2014

Optimum inertial design for self-propulsion: A new study investigates the effects of small but finite inertia on the propulsion of micro and nano-scale swimming machines July 29th, 2014

A new way to make microstructured surfaces: Method can produce strong, lightweight materials with specific surface properties July 29th, 2014

Materials/Metamaterials

Nature inspires a greener way to make colorful plastics July 30th, 2014

Flexible Metamaterial Absorbers July 29th, 2014

Tough foam from tiny sheets: Rice University lab uses atom-thick materials to make ultralight foam July 29th, 2014

A new way to make microstructured surfaces: Method can produce strong, lightweight materials with specific surface properties July 29th, 2014

Announcements

University of Manchester selects Anasys AFM-IR for coatings and corrosion research July 30th, 2014

Nature inspires a greener way to make colorful plastics July 30th, 2014

Analytical solutions from Malvern Instruments support University of Wisconsin-Milwaukee researchers in understanding environmental effects of nanomaterials July 30th, 2014

FEI Unveils New Solutions for Faster Time-to-Analysis in Metals Research July 30th, 2014

Military

Tough foam from tiny sheets: Rice University lab uses atom-thick materials to make ultralight foam July 29th, 2014

A new way to make microstructured surfaces: Method can produce strong, lightweight materials with specific surface properties July 29th, 2014

Production of Toxic Gas Sensor Based on Nanorods July 28th, 2014

New imaging agent provides better picture of the gut July 25th, 2014

Textiles/Clothing

Iranian Scientists Change Structure of Nanoparticles to Increase Durability of Antibacterial Activity of Fabrics July 7th, 2014

Nano-coatings release almost no nano-particles: Silver in the washing machine June 30th, 2014

Iranian Researchers Produce Protein Nanoparticles from Chicken Feather June 11th, 2014

Breakthrough in energy storage: Electrical cables that can store energy: New nanotech may provide power storage in electric cables, clothes June 2nd, 2014

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