Nanotechnology Now

Our NanoNews Digest Sponsors

Heifer International

Wikipedia Affiliate Button

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/Fullerenes

Semiconducting inorganic double helix: New flexible semiconductor for electronics, solar technology and photo catalysis September 15th, 2016

World's most powerful X-ray takes a 'sledgehammer' to molecules September 14th, 2016

Researchers design solids that control heat with spinning superatoms: Carnegie Mellon University and Columbia University collaborators discover the cause of vastly different thermal conductivities in superatomic structural analogues September 8th, 2016

For first time, carbon nanotube transistors outperform silicon September 8th, 2016

Discoveries

Fighting cancer with sticky nanoparticles September 27th, 2016

Gold nanoparticles conjugated quercetin inhibits epithelial-mesenchymal transition, angiogenesis and invasiveness via EGFR/VEGFR-2 mediated pathway in breast cancer September 27th, 2016

UNAM develops successful nano edible coating which increases life food September 27th, 2016

Crystalline Fault Lines Provide Pathway for Solar Cell Current: New tomographic AFM imaging technique reveals that microstructural defects, generally thought to be detrimental, actually improve conductivity in cadmium telluride solar cells September 26th, 2016

Materials/Metamaterials

UNAM develops successful nano edible coating which increases life food September 27th, 2016

Crystalline Fault Lines Provide Pathway for Solar Cell Current: New tomographic AFM imaging technique reveals that microstructural defects, generally thought to be detrimental, actually improve conductivity in cadmium telluride solar cells September 26th, 2016

Chains of nanogold forged with atomic precision September 23rd, 2016

Coffee-infused foam removes lead from contaminated water September 21st, 2016

Announcements

Dr Barbara Armbruster promoted to Worldwide Sales and Marketing Director for XEI Scientific September 27th, 2016

Fighting cancer with sticky nanoparticles September 27th, 2016

Gold nanoparticles conjugated quercetin inhibits epithelial-mesenchymal transition, angiogenesis and invasiveness via EGFR/VEGFR-2 mediated pathway in breast cancer September 27th, 2016

UNAM develops successful nano edible coating which increases life food September 27th, 2016

Military

Tattoo therapy could ease chronic disease: Rice-made nanoparticles tested at Baylor College of Medicine may help control autoimmune diseases September 23rd, 2016

Nano-lipid particles from edible ginger could improve drug delivery for colon cancer, study finds September 8th, 2016

3-D graphene has promise for bio applications: Rice University-led team welds nanoscale sheets to form tough, porous material September 7th, 2016

Nanodiamonds in an instant: Rice University-led team morphs nanotubes into tougher carbon for spacecraft, satellites September 6th, 2016

Textiles/Clothing

Stretchy supercapacitors power wearable electronics August 25th, 2016

Weird, water-oozing material could help quench thirst: Nanorods' behavior first theorized 20 years ago, but not seen until now June 13th, 2016

Programmable materials find strength in molecular repetition May 23rd, 2016

The impact of anti-odor clothing on the environment March 31st, 2016

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







Car Brands
Buy website traffic