Navigation Links
A possible answer for protection against chemical/biological agents, fuel leaks, and coffee stains
Date:1/31/2013

A recent discovery funded by the Air Force Office of Scientific Research (AFOSR) may very well lead to a process that not only benefits every uniformed service member of the Department of Defense, but everyone else as well: protection from Chemical/Biological agents, to self-cleaning apparel, to effortless thermal management, to fuel purification as well as enhanced control of leaksespecially oil and fuels.

In 2006, AFOSR Program Manager Dr. Charles Lee funded Professor Gareth McKinley at the Massachusetts Institute of Technology exploring nanocomposite technology for Defense applications. Anish Tuteja, an MIT doctoral student at the time, was exploiting the unusual surface properties of a nanocomposite with fluorinated nanoparticles, to create a superoleophobic surface. After graduation, Tuteja moved to University of Michigan in Ann Arbor, where he is currently an assistant professor of materials science and engineering, specializing in chemical engineering and macromolecular science and engineering. He was awarded a Young Investigator Program grant from AFOSR in 2011, and continued to conduct the same line of research begun at MIT. His team also included doctoral student Shuaijun Pan and postdoctoral researcher Arun Kota, as well as collaboration with Dr. Joseph Mabry, from the Rocket Propulsion Division of the Air Force Research Laboratory, at Edwards AFB, California.

In their latest paper, "Superomniphobic Surfaces for Effective Chemical Shielding," in the current issue of the Journal of the American Chemical Society, Tuteja and his team have demonstrated surfaces that effectively perform as "chemical shields against virtually all liquids."

To make this possible, surfaces are prepared using a nanoscale coating that is approximately 95 percent air, which in turn, repels liquids of any material in its class, causing them to literally bounce off the treated surface. The surfaces "possess hierarchical scales of re-entrant texture that significantly reduce the solid−liquid contact area." It all comes down to controlling how much contact the liquid ultimately has with the treated surface. To accomplish that the researchers apply the nanoscale coating using a process called electrospinningusing an electric charge to create fine particles of solid derived from a liquid solution.

The coating is a mixture of cross-linked "polydimethylsiloxane," or PDMS, and liquid-resisting nanoscale cubes developed by the Air Force that contain carbon, fluorine, silicon and oxygen. While the material's chemistry is important, so is its texture, because it hugs the pore structure of whatever surface it is applied to, and creates a fine web of air pockets within those pores, so any liquid that comes in contact with the coating is barely touching a solid surface.

According to Dr. Tuteja, when an untreated surface and a liquid get in close proximity, "they imbue a small positive or negative charge on each other, and as soon as the liquid comes in contact with the solid surface, it will start to spread.we've drastically reduced the interaction between the surface and the droplet." By effectively eliminating the contact between the treated surface and the liquid, there is almost no incentive for the liquid to spread, as such, the droplets stay intact, interacting only with molecules of themselves, and maintaining their spherical shape.

The research team has tested more than 100 liquids and found only two that were able to penetrate the coating: they were both chlorofluorocarbonschemicals used in refrigerators and air conditioners. In Tuteja's lab demonstrations the surface repelled coffee, soy sauce and vegetable oil, as well as toxic hydrochloric and sulfuric acids, and the surfaces are also resistant to gasoline and various alcohols.

This program is of particular interest to the Air Force and the Department of Defense, as it can be useful for self-cleaning surfaces (in particular, integral breathable protective Chemical/Biological Warfare defense in uniform clothing and sensor systems), improvement of thermal management efficiency in phase change cooling systems, fuel purification and the control of oil and fuel leakages in rockets and airplanes. Not to mention, protection against the everyday coffee spill.


'/>"/>
Contact: Robert White
robert.white@afosr.af.mil
Air Force Office of Scientific Research
Source:Eurekalert

Related biology technology :

1. Officials Find Bed Bugs in Wall Street Journal; Spray For Bed Bugs Offers Advice How to Safely Counter Possible Bed Bug Comeback
2. Genetic basis of high-risk childhood cancer points to possible new drug treatment strategy
3. Physicist Louis Del Monte Uses the Existence Equation Conjecture to Address “Is Time Travel Possible?”
4. Flexible silicon solar-cell fabrics may soon become possible
5. Possible Mold Infestation at Queens School Worries Parents; Doctor Mold Network Suggests a Mold Spray for a Safe and Effective Mold Remediation Process
6. Manufacturing complex 3-D metallic structures at nanoscale made possible
7. Metabolic engineer synthesizes key breast milk ingredient, makes research possible
8. New wave of technologies possible after ground-breaking analysis tool developed
9. The Law Firm of Levi & Korsinsky, LLP Launches an Investigation Into Possible Securities Laws Violations by Pacific Biosciences of California, Inc.
10. Garage Start-ups Now Possible in Life Sciences Industry
11. Are electron tweezers possible? Apparently so
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:5/27/2016)... ... ... Doctors in Italy, Japan, the UK and the US have reached some surprising ... its link to malignant mesothelioma. Surviving Mesothelioma has just posted the details of their ... , The studies analyzed for the new report included more than 3,447 cancer patients. ...
(Date:5/26/2016)... NEW YORK , May 26, 2016 ... announced today that it will be a featured presenter at ... 2016 in New York City at ... Denis Corin , Q BioMed Inc. CEO, is scheduled ... presentation will cover the company,s business strategy, recent developments and ...
(Date:5/25/2016)... ... May 25, 2016 , ... Lajollacooks4u has become a rising hotspot ... rated one of its top attractions. Fortune 500 companies, such as Illumina, Hewlett-Packard, ... unique and intimate team-building experience. , Each event kicks off with an olive oil ...
(Date:5/25/2016)... , ... May 25, 2016 , ... Scientists at the ... options being tried for mesothelioma may be hampering the research that could lead to ... Click here to read it now. , The team evaluated 98 ...
Breaking Biology Technology:
(Date:3/14/2016)... , Allemagne, March 14, 2016 ... ) - --> - Renvoi : image ... --> --> ... biométriques, fournit de nouveaux lecteurs d,empreintes digitales pour ... de DERMALOG sera utilisé pour produire des cartes ...
(Date:3/10/2016)... 10, 2016   Unisys Corporation (NYSE: UIS ... (CBP) is testing its biometric identity solution at the ... to help identify certain non-U.S. citizens leaving the country. ... designed to help determine the efficiency and accuracy of using ... and will run until May 2016. --> ...
(Date:3/8/2016)... March 8, 2016   Valencell , the ... announced it has secured $11M in Series D ... a new venture fund being launched by UAE-based ... from existing investors TDF Ventures and WSJ Joshua ... continue its triple-digit growth and accelerate its pioneering ...
Breaking Biology News(10 mins):