Nanotechnology Now

Our NanoNews Digest Sponsors





Heifer International

Wikipedia Affiliate Button


android tablet pc

Home > Press > Not-weak knots bolster carbon fiber: New material created at Rice University with graphene oxide flakes

A knotted carbon fiber made at Rice University has the same tensile strength along its entire length. That property may make it suitable for advanced fabrics. (Credit: Tour Group/Rice University)
A knotted carbon fiber made at Rice University has the same tensile strength along its entire length. That property may make it suitable for advanced fabrics.

(Credit: Tour Group/Rice University)

Abstract:
Large flakes of graphene oxide are the essential ingredient in a new recipe for robust carbon fiber created at Rice University.



The fiber spun at Rice is unique for the strength of its knots. Most fibers are most likely to snap under tension at the knot, but Rice's fiber demonstrates what the researchers refer to as "100 percent knot efficiency," where the fiber is as likely to break anywhere along its length as at the knot.

Not-weak knots bolster carbon fiber: New material created at Rice University with graphene oxide flakes

Houston, TX | Posted on July 8th, 2013

The new work from the Rice lab of chemist James Tour appears online today in the journal Advanced Materials.

The material could be used to increase the strength of many products that use carbon fiber, like composites for strong, light aircraft or fabrics for bulletproof apparel, according to the researchers.

"To see this is very strange," Tour said. "The knot is as strong as any other part of the fiber. That never happens in a carbon fiber or polymer fibers."

Credit goes to the unique properties of graphene oxide flakes created in an environmentally friendly process patented by Rice a few years ago. The flakes that are chemically extracted from graphite seem small. They have an average diameter of 22 microns, a quarter the width of an average human hair. But they're massive compared with the petroleum-based pitch used in current carbon fiber. "The pitch particles are two nanometers in size, which makes our flakes about ten thousand times larger," said Rice graduate student Changsheng Xiang, lead author of the new paper.

Like with pitch, the weak van der Waals force holds the graphene flakes together. Unlike pitch, the atom-thick flakes have an enormous surface area and cling to each other like the scales on a fish when pulled into a fiber. The wet-spinning process is similar to one recently used to create highly conductive fibers made of nanotubes, but in this case Xiang just used water as the solvent rather than a super acid.

Bendability at the knot is due to the fiber's bending modulus, which is a measure of its flexibility, Xiang said. "Because graphene oxide has very low bending modulus, it thinks there's no knot there," he said.

Tour said industrial carbon fibers -- a source of steel-like strength in ultralight materials ranging from baseball bats to bicycles to bombers -- haven't improved much in decades because the chemistry involved is approaching its limits. But the new carbon fibers spun at room temperature at Rice already show impressive tensile strength and modulus and have the potential to be even stronger when annealed at higher temperatures.

Heating the fibers to about 2,100 degrees Celsius, the industry standard for making carbon fiber, will likely eliminate the knotting strength, Xiang said, but should greatly improve the material's tensile strength, which will be good for making novel composite materials.

The Rice researchers also created a second type of fiber using smaller 9-micron flakes of graphene oxide. The small-flake fibers, unlike the large, were pulled from the wet-spinning process under tension, which brought the flakes into even better alignment and resulted in fibers with strength approaching that of commercial products, even at room temperature.

Co-authors of the paper are Rice graduate students Colin Young, Gabriel Cerioti, Chi-Chau Hwang and Zheng Yan; postdoctoral researchers Xuan Wan and Jian Lin; Junichiro Kono, a professor of electrical and computer engineering and of physics and astronomy; and Matteo Pasquali, a professor of chemical and biomolecular engineering and of chemistry. Tour is the T.T. and W.F. Chao Chair in Chemistry as well as a professor of mechanical engineering and materials science and of computer science at Rice.

The Air Force Research Laboratory (through the University Technology Corp.), the Office of Naval Research, the Air Force Office of Scientific Research and the Welch Foundation supported the research.

####

About Rice University
Located on a 300-acre forested campus in Houston, Rice University is consistently ranked among the nation's top 20 universities by U.S. News & World Report. Rice has highly respected schools of Architecture, Business, Continuing Studies, Engineering, Humanities, Music, Natural Sciences and Social Sciences and is home to the Baker Institute for Public Policy. With 3,708 undergraduates and 2,374 graduate students, Rice's undergraduate student-to-faculty ratio is 6-to-1. Its residential college system builds close-knit communities and lifelong friendships, just one reason why Rice has been ranked No. 1 for best quality of life multiple times by the Princeton Review and No. 2 for "best value" among private universities by Kiplinger's Personal Finance. To read "What they're saying about Rice," go to tinyurl.com/AboutRiceU.

Follow Rice News and Media Relations via Twitter @RiceUNews

For more information, please click here

Contacts:
David Ruth
713-348-6327


Jade Boyd
713-348-6778

Copyright © Rice University

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 Links

Read the abstract at:

Related News Press

News and information

University of Tehran Researchers Invent Non-Enzyme Sensor to Detect Blood Sugar April 23rd, 2014

Gold nanoparticles help target, quantify breast cancer gene segments in a living cell April 23rd, 2014

Study finds long-term survival of human neural stem cells transplanted into primate brain April 23rd, 2014

High-Performance, Low-Cost Ultracapacitors Built with Graphene and Carbon Nanotubes: Future devices based on technology could bridge gap between batteries and conventional capacitors in portable electronics and hybrid electric vehicles April 23rd, 2014

Guo Lab Shows Potential of RNA as Heat-resistant Polymer Material for Nanoarchitectures April 23rd, 2014

Graphene

High-Performance, Low-Cost Ultracapacitors Built with Graphene and Carbon Nanotubes: Future devices based on technology could bridge gap between batteries and conventional capacitors in portable electronics and hybrid electric vehicles April 23rd, 2014

Nanomaterial Outsmarts Ions April 22nd, 2014

Scientists observe quantum superconductor-metal transition and superconducting glass: A team including MIPT physicist observed quantum superconductor-metal transition and superconducting glass April 16th, 2014

Better solar cells, better LED light and vast optical possibilities April 12th, 2014

Chemistry

Thinnest feasible membrane produced April 17th, 2014

Targeting cancer with a triple threat: MIT chemists design nanoparticles that can deliver three cancer drugs at a time April 15th, 2014

Govt.-Legislation/Regulation/Funding/Policy

Gold nanoparticles help target, quantify breast cancer gene segments in a living cell April 23rd, 2014

Atomic switcheroo explains origins of thin-film solar cell mystery April 23rd, 2014

High-Performance, Low-Cost Ultracapacitors Built with Graphene and Carbon Nanotubes: Future devices based on technology could bridge gap between batteries and conventional capacitors in portable electronics and hybrid electric vehicles April 23rd, 2014

Guo Lab Shows Potential of RNA as Heat-resistant Polymer Material for Nanoarchitectures April 23rd, 2014

Discoveries

University of Tehran Researchers Invent Non-Enzyme Sensor to Detect Blood Sugar April 23rd, 2014

Gold nanoparticles help target, quantify breast cancer gene segments in a living cell April 23rd, 2014

Atomic switcheroo explains origins of thin-film solar cell mystery April 23rd, 2014

Characterizing inkjet inks: Malvern Instruments presents new rheological research April 23rd, 2014

Materials/Metamaterials

Guo Lab Shows Potential of RNA as Heat-resistant Polymer Material for Nanoarchitectures April 23rd, 2014

Nanomaterial Outsmarts Ions April 22nd, 2014

Thinnest feasible membrane produced April 17th, 2014

INSCX™ exchange to present Exchange trade reporting mechanism for engineered nanomaterials (NMs) to UK regulation agencies, insurers and upstream/downstream users April 17th, 2014

Announcements

Characterizing inkjet inks: Malvern Instruments presents new rheological research April 23rd, 2014

NanoSafe, Inc. announces the addition of the Labconco Protector® Glove Box to its NanoSafe Tested™ registry April 23rd, 2014

Study finds long-term survival of human neural stem cells transplanted into primate brain April 23rd, 2014

High-Performance, Low-Cost Ultracapacitors Built with Graphene and Carbon Nanotubes: Future devices based on technology could bridge gap between batteries and conventional capacitors in portable electronics and hybrid electric vehicles April 23rd, 2014

Interviews/Book Reviews/Essays/Reports/Podcasts/Journals

Gold nanoparticles help target, quantify breast cancer gene segments in a living cell April 23rd, 2014

Economics = MC2 -- A portrait of the modern physics startup: Successful companies founded by physicists often break the Silicon Valley model, according to new American Institute of Physics report April 23rd, 2014

Study finds long-term survival of human neural stem cells transplanted into primate brain April 23rd, 2014

High-Performance, Low-Cost Ultracapacitors Built with Graphene and Carbon Nanotubes: Future devices based on technology could bridge gap between batteries and conventional capacitors in portable electronics and hybrid electric vehicles April 23rd, 2014

Military

Cloaked DNA nanodevices survive pilot mission: Successful foray opens door to virus-like DNA nanodevices that could diagnose diseased tissues and manufacture drugs to treat them April 22nd, 2014

'Exotic' material is like a switch when super thin April 18th, 2014

Tiny particles could help verify goods: Chemical engineers hope smartphone-readable microparticles could crack down on counterfeiting April 15th, 2014

Targeting cancer with a triple threat: MIT chemists design nanoparticles that can deliver three cancer drugs at a time April 15th, 2014

Sports

‘Four!' Heads Up, Wide Use of More Flexible Metallic Glass Coming Your Way: Advances in Glass Alloys Lead to Strength, Flexibility March 4th, 2014

ASTM International Nanotechnology Committee Approves Airborne Nanoparticle Measurement Standard December 10th, 2013

Discovery Inspired by nature: textured materials to aid industry and military: Innovation Corps team developed metals and plastic that repel water, capture sunlight and prevent ice build-up August 19th, 2013

First human tests of new biosensor that warns when athletes are about to ‘hit the wall’ July 24th, 2013

Aerospace/Space

National Space Society Congratulates SpaceX on the Success of CRS-3 and the First Flight of the Falcon 9R April 22nd, 2014

Tiny particles could help verify goods: Chemical engineers hope smartphone-readable microparticles could crack down on counterfeiting April 15th, 2014

NASA Engineers Prepare Game Changing Cryotank for Testing April 9th, 2014

Space Industry Leaders Countdown To Space Tech Expo 2014 – Opening Next Week: Space Tech Expo and Conference 2014 opens its doors at the Long Beach Convention Center, Long Beach April 1 – 3 March 30th, 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