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:3/24/2017)... and ROCKVILLE, Md. , March 24, ... Maxwell Biotech Venture Fund (MBVF), today announced positive results ... to the standard drug therapy regimen in patients with ... molecule drug discovered by scientists at Sequella, Inc. ( ... of Health. A total of 140 ...
(Date:3/24/2017)... , March 24, 2017 Sinovac Biotech Ltd. ("Sinovac" or ... China , today announced that its board of ... date of the plan from March 27, 2017 to March 27, ... About Sinovac Biotech Ltd. ... Sinovac Biotech Ltd. is a ...
(Date:3/24/2017)... 2017   Sienna Biopharmaceuticals, Inc. , a privately ... that Richard Peterson will join the company ... Peterson, who brings more than two decades of global ... is retiring at the end of April but will ... joins Sienna from Novan, Inc., where he served as ...
(Date:3/23/2017)... ... March 23, 2017 , ... AxioMed president, ... viscous and elastic characteristics when deformed, which is identical to how the human ... absorb compressive forces and return to its natural state along a hysteresis curve, ...
Breaking Biology Technology:
(Date:2/26/2017)... Feb. 25, 2017  Securus Technologies, a leading ... for public safety, investigation, corrections and monitoring, announces ... Reentry. "Too often, too many offenders ... county jails are trying to tackle this ongoing ... friends and family members. While significant steps are underway, ...
(Date:2/21/2017)... PORTLAND, Ore. , Feb. 22, 2017 ... Family of Companies (Avamere Health Services, Infinity Rehab, Signature ... research study that will apply the power of IBM ... living and health centers. By analyzing data streaming from ... insights into physical and environmental conditions, and obtain deeper ...
(Date:2/14/2017)... -- Wake Forest Baptist Medical Center today announced Julie Ann Freischlag, ... (CEO). Freischlag joins the medical center on May 1 ... who last year announced that he would transition to ... it since 2008.   As CEO, Freischlag ... academic health system, which includes Wake Forest School of ...
Breaking Biology News(10 mins):