Nanotechnology Now







Heifer International

Wikipedia Affiliate Button


DHgate

Home > Press > Lubricating with Nanometer-Sized Silver

Image: Workshop and DIY / FreeDigitalPhotos.net
Image: Workshop and DIY / FreeDigitalPhotos.net

Abstract:
The ever-increasing demands for energy efficiency and high temperature operation of machines require a careful consideration of lubricants for optimal performance. Tribological components like bearings and gears have driven the continual sophistication of lubricating materials and the development of additives which enhance their performance.

Lubricating with Nanometer-Sized Silver

Germany | Posted on March 22nd, 2012

These additives are designed to enhance specific attributes of lubricant properties, such as viscosity, performance at particular temperatures, friction and wear reduction, rust and corrosion prevention, or oxidative stability. Conventional oils and greases undergo severe degradation at elevated temperatures, whereas solid lubricants can function at far higher temperatures.

Commonly, graphite and MoS2, which have been studied for decades, are used as lubricant additives, but nanometer-sized particles have more recently made an appearance. Nanoparticles are particularly effective because they form more stable dispersions in oils than do larger particles.

To get an efficient and cost-effective system, Christina P. Twist and co-workers from the Northwestern University in Evanston, Illinois (USA), and the University of Jordan in Amman (Jordan) synthesized two silver complexes and added them to engine oil at various concentrations. Silver is a relatively soft metal and has been previously investigated as a solid lubricant in the form of coatings.

The researchers report on the thermolytic and tribological properties of these complexes as they are transformed to lubricious silver metal. They evaluated the performance of these complexes as lubricant additives via pin-on-disk friction tests and wear scar measurements.

Results of the friction tests and wear measurements indicate a significant reduction in wear and little change in friction. The improved wear performance is attributed to the thermolysis and deposition of the silver-based complexes in the wear scar. However, while the oil and silver complex suspensions were mixed thoroughly before testing for at least 15 min to achieve as homogeneous distribution as possible, some larger crystallites were likely present. This problem can be remedied in future using more lipophilic ligands.

####

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 News Press

News and information

Moving molecule writes letters: Caging of molecules allows investigation of equilibrium thermodynamics February 27th, 2015

Untangling DNA with a droplet of water, a pipet and a polymer: With the 'rolling droplet technique,' a DNA-injected water droplet rolls like a ball over a platelet, sticking the DNA to the plate surface February 27th, 2015

Indefinite Life Extension Activists Organize Online Demonstration February 26th, 2015

Renishaw and Bruker team up for a workshop on TERS and co-localised AFM Raman February 26th, 2015

Discoveries

Moving molecule writes letters: Caging of molecules allows investigation of equilibrium thermodynamics February 27th, 2015

Untangling DNA with a droplet of water, a pipet and a polymer: With the 'rolling droplet technique,' a DNA-injected water droplet rolls like a ball over a platelet, sticking the DNA to the plate surface February 27th, 2015

Real-time observation of bond formation by using femtosecond X-ray liquidography February 26th, 2015

Graphene shows potential as novel anti-cancer therapeutic strategy: University of Manchester scientists have used graphene to target and neutralise cancer stem cells while not harming other cells February 26th, 2015

Materials/Metamaterials

Moving molecule writes letters: Caging of molecules allows investigation of equilibrium thermodynamics February 27th, 2015

Graphene shows potential as novel anti-cancer therapeutic strategy: University of Manchester scientists have used graphene to target and neutralise cancer stem cells while not harming other cells February 26th, 2015

In quest for better lithium-air batteries, chemists boost carbon's stability: Nanoparticle coatings improve stability, cyclability of '3DOm' carbon February 25th, 2015

Learning by eye: Silicon micro-funnels increase the efficiency of solar cells February 25th, 2015

Announcements

Moving molecule writes letters: Caging of molecules allows investigation of equilibrium thermodynamics February 27th, 2015

Untangling DNA with a droplet of water, a pipet and a polymer: With the 'rolling droplet technique,' a DNA-injected water droplet rolls like a ball over a platelet, sticking the DNA to the plate surface February 27th, 2015

Bruker-Sponsored Sixth AFM BioMed Conference Highlights Increasing Impact of AFM in Biological Applications February 26th, 2015

Graphene shows potential as novel anti-cancer therapeutic strategy: University of Manchester scientists have used graphene to target and neutralise cancer stem cells while not harming other cells February 26th, 2015

Industrial

In quest for better lithium-air batteries, chemists boost carbon's stability: Nanoparticle coatings improve stability, cyclability of '3DOm' carbon February 25th, 2015

Purification of Industrial Wastewater Using Visible-Light Sensitive Photocatalysts February 24th, 2015

Increasing Efficiency of Cooling Devices in Oil, Gas Industries February 21st, 2015

Ligar secures investment from Wallace Corporation to commercialise polymers that pick out good and bad molecules: Ground-breaking science innovation removes molecules in the wrong place from liquids February 15th, 2015

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 1999-2015 7th Wave, Inc. All Rights Reserved PRIVACY POLICY :: CONTACT US :: STATS :: SITE MAP :: ADVERTISE