Navigation Links
Nano-oils keep their cool

Rice University scientists have created a nano-infused oil that could greatly enhance the ability of devices as large as electrical transformers and as small as microelectronic components to shed excess heat.

Research in the lab of Rice materials scientist Pulickel Ajayan, which appears in the American Chemical Society journal ACS Nano, could raise the efficiency of such transformer oils by as much as 80 percent in a way that is both cost-effective and environmentally friendly.

The Rice team headed by lead authors Jaime Taha-Tijerina, a graduate student, and postdoctoral researcher Tharangattu Narayanan focused their efforts on transformers for energy systems. Transformers are filled with mineral oils that cool and insulate the windings inside, which must remain separated from each other to keep voltage from leaking or shorting.

The researchers discovered that a very tiny amount of hexagonal boron nitride (h-BN) particles, two-dimensional cousins to carbon-based graphene, suspended in standard transformer oils are highly efficient at removing heat from a system.

"We don't need a large amount of h-BN," Narayanan said. "We found that 0.1 weight percentage of h-BN in transformer oil enhances it by nearly 80 percent."

"And at 0.01 weight percentage, the enhancement was around 9 percent," Taha-Tijerina said. "Even with a very low amount of material, we can enhance the fluids without compromising the electrically insulating properties."

Taha-Tijerina, who was employed by a transformer manufacturer in Mexico before coming to Rice, said others working on similar compounds are experimenting with particles of alumina, copper oxide and titanium oxide, but none of the compounds has the combination of qualities exhibited by h-BN.

Narayanan said the h-BN particles, about 600 nanometers wide and up to five atomic layers thick, disperse well in oil and, unlike highly conductive graphene, are highly resistant to electricity. With help from co-author Matteo Pasquali, a Rice professor of chemical and biomolecular engineering and of chemistry, the team determined that the oil's viscosity another important quality is minimally affected by the presence of the nanoparticle fillers.

"Our research shows that with new materials and innovative approaches, we can add enormous value to applications that exist today in industry," said Ajayan, Rice's Benjamin M. and Mary Greenwood Anderson Professor in Mechanical Engineering and Materials Science and of chemistry. "Thermal management is a big issue in industry, but the right choice of materials is important; for transformer cooling, one needs dispersants in oils that take heat away, yet remain electrically insulating. Moreover, the two-dimensional nature of the fillers keeps them stable in oils without settling down for long periods of time."

Contact: David Ruth
Rice University

Related biology technology :

1. Clionsky Neuro Systems (CNS-Neuro) Announces Publication of Study Finding Elderly Patients Unable to Recognize Their Memory Loss
2. In new quantum-dot LED design, researchers turn troublesome molecules to their advantage
3. The Japanese Cancer Association and Debiopharm Group™ Present Doctors Arakawa and Kurokawa With the 2011 JCA-Mauvernay Award for Their Innovative and Outstanding Research in the Field of Cancer
4. Some Patients Paying for Their Prostate Cancer Surgery for the Rest of Their Lives
5. Amgen Staff Volunteer Efforts Result in $5,000 For Each of Their Favorite Nonprofits
6. Tumor Marker Diagnostic Technologies: Assessment of Current and Emerging Technologies, And Their Potential Market Applications
7. Cadmium selenide quantum dots degrade in soil, releasing their toxic guts, study finds
8. The Pontifical Council for Culture and NeoStem Announce Steps Forward in their Partnership to Advance Adult Stem Cell Research
9. Life Technologies Employees Give Back to Their Communities During Eighth Annual Global Volunteer Day
10. Biological molecules select their spin
11. Grifols and Talecris Announce the Outside Date of Their Merger Agreement has been Extended to June 30, 2011
Post Your Comments:
(Date:11/24/2015)... , Nov. 24, 2015 /PRNewswire/ - Aeterna ... announced today that the remaining 11,000 post-share consolidation ... Purchase Warrants (the "Series B Warrants") subject to ... exercised on November 23, 2015, which will result ... After giving effect to the issuance of such ...
(Date:11/24/2015)... ... November 24, 2015 , ... ... are paramount. Insertion points for in-line sensors can represent a weak spot where ... InTrac 781/784 series of retractable sensor housings , which are designed to tolerate ...
(Date:11/24/2015)... , ... November 24, 2015 , ... ... OrthoAccel® Technologies, Inc., on being named to Deloitte's 2015 Technology Fast 500 list ... facility, OrthoAccel manufactures AcceleDent®, a FDA-cleared, Class II medical device that speeds up ...
(Date:11/24/2015)... , Nov. 24, 2015 Capricor Therapeutics, ... focused on the discovery, development and commercialization of first-in-class ... Chief Executive Officer, is scheduled to present at the ... at 10:50 a.m. EST, at The Lotte New York ... . . --> ...
Breaking Biology Technology:
(Date:11/9/2015)... , Nov. 9, 2015  Synaptics Inc. (NASDAQ: ... today announced broader entry into the automotive market with ... match the pace of consumer electronics human interface innovation. ... are ideal for the automotive industry and will be ... Europe , Japan ...
(Date:10/29/2015)... Daon, a global leader in mobile biometric ... new version of its IdentityX Platform , IdentityX ... have already installed IdentityX v4.0 and are ... FIDO UAF certified server component as an option ... features. These customers include some of the largest and ...
(Date:10/27/2015)... , Oct. 27, 2015 In the present ... of concern for various industry verticals such as banking, ... to the growing demand for secure & simplified access ... ,sectors, such as hacking of bank accounts, misuse of ... equipment such as PC,s, laptops, and smartphones are expected ...
Breaking Biology News(10 mins):