Nanotechnology Now

Our NanoNews Digest Sponsors





Heifer International

Wikipedia Affiliate Button


android tablet pc

Home > Press > Click coupled graphene: fabricating nanocomposites

Abstract:
A graphene sheet can be incorporated with poly(ε-carprolactone) (PCL) to enhance the mechanical and thermal properties of shape memory polyurethane (SMP) if the filler can be properly dispersed through the polymer. Writing in the Journal of Polymer Science: Polymer Physics, Jae Whan Cho and colleagues introduce an effective technique using click coupled graphene to obtain high-performance nanocomposites.

Click coupled graphene: fabricating nanocomposites

Germany | Posted on October 13th, 2012

Graphene holds great potential in applications like molecular electronics, field emission devices, actuators, and sensors. "Click coupling is an emerging modification method for graphene's functionalization due to its high specificity, quantitative yield, compatibility with a variety of functional groups, and versatile applications under mild conditions," says Cho. "The controlled high performance of graphene-based polymer nanocomposites, including the mechanical, electrical, and thermal applications, can be created by using click chemistry."

The use of the click coupling approach allows a high grafting ratio of PCL to a single graphene sheet, resulting in good solubility and processability. As a result of the successful grafting, the modified surface characteristics allow for a homogenous dispersion of functionalized graphene in the SMP matrix displaying a strong reinforcement effect.

The breaking stress, elongation-at-break, and Young's modulus of the SMP were greatly enhanced, increasing by 109%, 28%, and 158% respectively for 2.0 wt% of the PCL-GS nanofiller compared to pure SMP. Moreover, the thermal stability, thermal conductivity, and shape recovery behavior of the host polymer were also unprecedentedly improved after the insertion of the click coupled graphene sheet.

"This approach offers complementary advantages, such as the grafting of high molecular weight polymer chains and a better coverage ratio on the graphene surface. This is also though to greatly extend the application range of graphene and encourage the growth of graphene based high performance nanocomposites for shape memory application, actuator, sensor, and etc," explains Cho.

Looking to expand the approach, Cho says that click chemistry is useful for modifying the surface properties of other carbon nanomaterials such as carbon nanotubes, graphene, and fullerene to satisfy special needs. "This methodology will help us to develop more advanced biomaterials, nanostructured polymers, and hybrids based on carbon nanomaterials."

####

For more information, please click here

Copyright © Wiley-VCH Materials Science Journals

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

Link to the original paper on Wiley Online Library:

Related News Press

News and information

Iran to Hold 3rd Int'l Engineering Materials, Metallurgy Conference October 25th, 2014

Haydale Secures Exclusive Development and Supply Agreement with Tantec A/S: New reactors to be built and commissioned by Tantec A/S represent another step forward towards the commercialisation of graphene October 24th, 2014

QuantumWise guides the semiconductor industry towards the atomic scale October 24th, 2014

SUNY Polytechnic Institute Invites the Public to Attend its Popular Statewide 'NANOvember' Series of Outreach and Educational Events October 23rd, 2014

Graphene

Haydale Secures Exclusive Development and Supply Agreement with Tantec A/S: New reactors to be built and commissioned by Tantec A/S represent another step forward towards the commercialisation of graphene October 24th, 2014

Nanotubes/Buckyballs

Materials for the next generation of electronics and photovoltaics: MacArthur Fellow develops new uses for carbon nanotubes October 21st, 2014

Special UO microscope captures defects in nanotubes: University of Oregon chemists provide a detailed view of traps that disrupt energy flow, possibly pointing toward improved charge-carrying devices October 21st, 2014

Imaging electric charge propagating along microbial nanowires October 20th, 2014

Beyond LEDs: Brighter, new energy-saving flat panel lights based on carbon nanotubes - Planar light source using a phosphor screen with highly crystalline single-walled carbon nanotubes (SWCNTs) as field emitters demonstrates its potential for energy-efficient lighting device October 14th, 2014

Sensors

MEMS & Sensors Technology Showcase: Finalists Announced for MEMS Executive Congress US 2014 October 23rd, 2014

Journal Nanotechnology Progress International (JONPI), 2014, Volume 5, Issue 1, pp 1-24 October 22nd, 2014

Imaging electric charge propagating along microbial nanowires October 20th, 2014

Graphenea opens US branch October 16th, 2014

Discoveries

QuantumWise guides the semiconductor industry towards the atomic scale October 24th, 2014

Iranian, Malaysian Scientists Study Nanophotocatalysts for Water Purification October 23rd, 2014

Nanoparticle technology triples the production of biogas October 23rd, 2014

Strengthening thin-film bonds with ultrafast data collection October 23rd, 2014

Materials/Metamaterials

Iran to Hold 3rd Int'l Engineering Materials, Metallurgy Conference October 25th, 2014

Researchers patent a nanofluid that improves heat conductivity October 22nd, 2014

Materials for the next generation of electronics and photovoltaics: MacArthur Fellow develops new uses for carbon nanotubes October 21st, 2014

Super stable garnet ceramics may be ideal for high-energy lithium batteries October 21st, 2014

Announcements

Iran to Hold 3rd Int'l Engineering Materials, Metallurgy Conference October 25th, 2014

Haydale Secures Exclusive Development and Supply Agreement with Tantec A/S: New reactors to be built and commissioned by Tantec A/S represent another step forward towards the commercialisation of graphene October 24th, 2014

QuantumWise guides the semiconductor industry towards the atomic scale October 24th, 2014

Strengthening thin-film bonds with ultrafast data collection October 23rd, 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