Nanotechnology Now

Our NanoNews Digest Sponsors

Heifer International

Wikipedia Affiliate Button

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

Semiliquid chains pulled out of a sea of microparticles July 20th, 2017

Tokyo Institute of Technology research: Antiaromatic molecule displays record electrical conductance July 19th, 2017

Harnessing light to drive chemical reactions July 19th, 2017

Nanoparticles could spur better LEDs, invisibility cloaks July 19th, 2017

Graphene/ Graphite

Scientists produce dialysis membrane made from graphene: Material can filter nanometer-sized molecules at 10 to 100 times the rate of commercial membranes June 29th, 2017

Rice U. chemists create 3-D printed graphene foam June 22nd, 2017

Thought Leaders and Experts Join National Graphene Association Advisory Board June 16th, 2017

Seeing the invisible with a graphene-CMOS integrated device June 6th, 2017

Nanotubes/Buckyballs/Fullerenes/Nanorods

Killing cancer in the heat of the moment: A new method efficiently transfers genes into cells, then activates them with light. This could lead to gene therapies for cancers July 9th, 2017

Tests show no nanotubes released during utilisation of nanoaugmented materials June 9th, 2017

Ag/ZnO-Nanorods Schottky diodes based UV-PDs are fabricated and tested May 26th, 2017

Fed grant backs nanofiber development: Rice University joins Department of Energy 'Next Generation Machines' initiative May 10th, 2017

Sensors

Giant enhancement of electromagnetic waves revealed within small dielectric particles: Scientists have done for the first time direct measurements of giant electromagnetic fields July 8th, 2017

Bosch announces high-performance MEMS acceleration sensors for wearables June 27th, 2017

Letiís Autonomous-Vehicle System Embedded in Infineonís AURIX Platform: Letiís Low-Power, Multi-Sensor System that Transforms Distance Data into Clear Information About the Driving Environment Will Be Demonstrated at ITS Meeting in Strasbourg, June 19-22 June 20th, 2017

New diode features optically controlled capacitance: Israeli researchers have developed a new optically tunable capacitor with embedded metal nanoparticles, creating a metal-insulator-semiconductor diode that is tunable by illumination. June 8th, 2017

Discoveries

Semiliquid chains pulled out of a sea of microparticles July 20th, 2017

Here's a tip: Indented cement shows unique properties: Rice University models reveal nanoindentation can benefit crystals in concrete July 20th, 2017

Tokyo Institute of Technology research: Antiaromatic molecule displays record electrical conductance July 19th, 2017

Harnessing light to drive chemical reactions July 19th, 2017

Materials/Metamaterials

Carbon displays quantum effects July 13th, 2017

Meniscus-assisted technique produces high efficiency perovskite PV films July 7th, 2017

ANU invention may help to protect astronauts from radiation in space July 3rd, 2017

Brookhaven Scientists Study Role of 'Electrolyte Gating' in Functional Oxide Materials July 3rd, 2017

Announcements

Semiliquid chains pulled out of a sea of microparticles July 20th, 2017

Here's a tip: Indented cement shows unique properties: Rice University models reveal nanoindentation can benefit crystals in concrete July 20th, 2017

Tokyo Institute of Technology research: Antiaromatic molecule displays record electrical conductance July 19th, 2017

Harnessing light to drive chemical reactions July 19th, 2017

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