Nanotechnology Now

Our NanoNews Digest Sponsors

Heifer International

Wikipedia Affiliate Button

Home > Press > Iranian Researchers Gain New Insight into Thermal Properties of Nanotubes

Abstract:
The results of a joint scientific work by the Iranian researchers at the University of Tehran and Research Institute of Petroleum Industry (RIPI) revealed new insights into the thermal properties of carbon nanotubes.

Iranian Researchers Gain New Insight into Thermal Properties of Nanotubes

Tehran, Iran | Posted on April 21st, 2012

The findings can have a significant impact on the performance of heat exchangers, drilling muds and cements.

The research group initially prepared five different structures of carbon nanotubes with varying number of walls through the CVD method and subsequently functionalized them by alkali salts to yield super stable nanofluids of each type. As a final part of their analysis, the researchers measured the thermal conductance of the synthesized nanofluids as a function of temperature and time. In addition, the researchers appraised the stability of the mentioned nanofluids through three different methods for the sake of completeness.

As a corollary derived from the research, increasing the layers of nanotubes is in favor of the apparent thermal conductivity. This is attributed to an increased effective contact surface due to existence of more layers and the influence of the layer thicknesses.

"The adopted method to functionalize the nanotubes had been originally intended for treatment of single wall carbon nanotubes, however, we managed to use it for other CNT structures after some refinements. Consequently, prolonged stability duration (more than six months) as well as less destructive effects caused by the utilization of acids were achieved. In fact, we took advantage of potassium persulfate as the oxidizing agent to bypass the need for acids or inorganic solvents. In summary, our approach features economy, compatibility with the environment, ease of practicality and operation," Ayda Nasiri, a member of the research group, explained.


####

For more information, please click here

Copyright © Fars News Agency

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

News and information

Triboelectric Nanogenerators Boost Mass Spectrometry Performance March 1st, 2017

Biosensors: Distance makes the signal grow stronger March 1st, 2017

Smart multi-layered magnetic material acts as an electric switch: New study reveals characteristic of islands of magnetic metals between vacuum gaps, displaying tunnelling electric current March 1st, 2017

Bioinspired process makes materials light, robust, programmable at nano- to macro-scale: Ultralight web of silk nano fibers withstands load 4,000 times its weight February 28th, 2017

Nanotubes/Buckyballs/Fullerenes

Boron atoms stretch out, gain new powers: Rice University simulations demonstrate 1-D material's stiffness, electrical versatility January 26th, 2017

New stem cell technique shows promise for bone repair January 25th, 2017

Captured on video: DNA nanotubes build a bridge between 2 molecular posts: Research may lead to new lines of direct communication with cells January 9th, 2017

Nano-chimneys can cool circuits: Rice University scientists calculate tweaks to graphene would form phonon-friendly cones January 4th, 2017

Materials/Metamaterials

Bioinspired process makes materials light, robust, programmable at nano- to macro-scale: Ultralight web of silk nano fibers withstands load 4,000 times its weight February 28th, 2017

Sandia use confined nanoparticles to improve hydrogen storage materials performance: Big changes from a small package for hydrogen storage February 25th, 2017

Atom-scale oxidation mechanism of nanoparticles helps develop anti-corrosion materials February 24th, 2017

EmTech Asia breaks new barriers with potential applications of space exploration with NASA and MIT February 22nd, 2017

Announcements

Triboelectric Nanogenerators Boost Mass Spectrometry Performance March 1st, 2017

Biosensors: Distance makes the signal grow stronger March 1st, 2017

Smart multi-layered magnetic material acts as an electric switch: New study reveals characteristic of islands of magnetic metals between vacuum gaps, displaying tunnelling electric current March 1st, 2017

Bioinspired process makes materials light, robust, programmable at nano- to macro-scale: Ultralight web of silk nano fibers withstands load 4,000 times its weight February 28th, 2017

Research partnerships

Nano 'sandwich' offers unique properties: Rice University researchers simulate two-dimensional hybrids for optoelectronics February 27th, 2017

Sandia use confined nanoparticles to improve hydrogen storage materials performance: Big changes from a small package for hydrogen storage February 25th, 2017

Molecular phenomenon discovered by advanced NMR facility: Cutting edge technology has shown a molecule self-assembling into different forms when passing between solution state to solid state, and back again - a curious phenomenon in science - says research by the University of Wa February 22nd, 2017

Graphene foam gets big and tough: Rice University's nanotube-reinforced material can be shaped, is highly conductive February 13th, 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