It can repel water, oil, alcohol and even peanut butter. And it might save the U.S. Navy millions of dollars in ship fuel costs, reduce the amount of energy that vessels consume and improve operational efficiency.
The Office of Naval Research (ONR) is sponsoring work by Dr. Anish Tuteja, an associate professor of materials science and engineering at the University of Michigan, to develop a new type of “omniphobic” coating. This chemical coating is clear, durable, can be applied to numerous surfaces and sheds just about any liquid.
Of particular interest to the Navy is how omniphobic coatings can reduce friction drag—resistance created by the movement of a hull through water—on ships, submarines and unmanned underwater vessels.
Compare friction drag to jogging through a swimming pool. Because of the water’s resistance, each stride is more difficult and requires more energy and effort.
“A significant percentage of a ship’s fuel consumption [up to 80 percent at lower speeds and 40-50 percent at higher speeds] goes toward maintaining its speed and overcoming friction drag,” said Dr. Ki-Han Kim, a program officer in ONR’s Sea Warfare and Weapons Department. “If we could find a way to drastically reduce friction drag, vessels would consume less fuel or battery power, and enjoy a greater range of operations.”
Tuteja’s omniphobic coating could be a solution. Picture two ships sailing at the same speed—one dealing with friction drag and the other covered in a coating that causes water to bead up and slide off the hull easily. The coated vessel theoretically would guzzle less fuel because it doesn’t have to fight as much water resistance while maintaining speed.
While repellent coatings aren’t new, it’s hard to create one that resists most liquids and is tough enough to stick to various surfaces for long periods of time. Take a Teflon-coated pan, for example. Water will bead up and roll off the pan, while cooking oil will spread everywhere.
“Researchers may take a very durable polymer matrix and a very repellent filler and mix them,” said Tuteja. “But this doesn’t necessarily yield a durable, repellent coating. Different polymers and fillers have different miscibilities [the ability of two substances to mix together]. Simply combining the most durable individual constituents doesn’t yield the most durable composite coating.”
To engineer their innovative coating, Tuteja and his research team studied vast computer databases of known chemical substances. They then entered complex mathematical equations, based on each substance’s molecular properties, to predict how any two would behave when blended. After analyzing hundreds of combinations, researchers found the right mix.
The molecular marriage was a hit during laboratory tests. The rubber-like combo can be sprayed, brushed, dipped or spin-coated onto numerous surfaces, and it binds tightly. The coating also can withstand scratching, denting and other hazards of daily use. And the way the molecules separate makes the coating optically clear.
Besides reducing friction drag, Tuteja envisions other Navy uses for the omniphobic coating—including protecting high-value equipment like sensors, radars and antennas from weather.
In addition to omniphobic coatings to lessen friction drag, ONR is sponsoring other types of coating research to prevent corrosion on both ships and aircraft and fight biofouling (the buildup of barnacles on hulls). Similar coatings can also prevent ice from forming on ships operating in cold regions, or make ice removal much easier than conventional methods like scraping.
Tuteja’s team is conducting further tests on the omniphobic coating, but they plan to have it ready for small-scale military and civilian use within the next couple of years.
Watch a video of an omniphobic coating test.
The Latest on: Omniphobic coating
[google_news title=”” keyword=”omniphobic coating” num_posts=”10″ blurb_length=”0″ show_thumb=”left”]
via Google News
The Latest on: Omniphobic coating
- Cleaning Up Hazardous Liquid Spills with Robotic Droplet Manipulatorson November 18, 2022 at 8:33 am
Soft robotics and extremely omniphobic coatings were two applied technologies that were combined to make it happen. Nylon fibers and adhesive tape, two relatively cheap materials, are used to ...
- Low Temperature Powder Coatings Market worth $116 million by 2027 - Exclusive Report by MarketsandMarketson November 17, 2022 at 5:34 am
CHICAGO, Nov. 17, 2022 /PRNewswire/ -- According to the new market research report "Low Temperature Powder Coatings Market by Substrate (Metal, Non-metal), Resin (Hybrid, Polyester, Epoxy), and ...
- UV Curable Coatings Market to cross $12 Bn by 2032, says Global Market Insights Inc.on November 16, 2022 at 4:16 am
Selbyville, Delaware, Nov. 16, 2022 (GLOBE NEWSWIRE) -- According to a recent report by Global Market Insights Inc., the global UV curable coatings market is anticipated to cross a valuation of ...
- Beware ‘Winter Coating’ — the newest coldhearted dating trendon November 15, 2022 at 1:21 pm
“Winter coating” is when an old flame comes back to heat up your dating life during the frostiest season — only to discard you as spring comes, just like an old, trusty North Face jacke ...
- Passion fruit yields high antioxidant ingredient for stable edible food coatingson November 13, 2022 at 10:02 pm
The high antioxidants and polyphenols content in passion fruit peels show significant potential to preserve fresh fruits and fresh cuts in an edible food coating, shows research from the ...
- Passion fruit yields high antioxidant ingredient for stable edible food coatingson November 13, 2022 at 4:01 pm
Microencapsulated powder of passion fruit peels preserve high levels of antioxidants and polyphenols. The powders are suitable as stable ingredients in high antioxidant, edible food coatings to ...
- 3D Printing Turns Ordinary Paper into Human-Machine Interfaceon November 10, 2022 at 4:00 pm
Scientists have developed a way to turn ordinary paper or cardboard into an interactive electronic device using a new coating they’ve developed. Researchers from Purdue University created an ...
- "Winter Coating" Is The Toxic New Dating Trend You Need to Look Out Foron November 10, 2022 at 10:15 am
But as the nights get colder and the cost of living crisis sees prices soar, there's a worrying new dating trend that you need to be on the lookout for: winter coating. Not to be mistaken with the ...
- Blazing a trail in the total coating and construction industryon November 9, 2022 at 7:19 pm
OVER the past 140 years, Nippon Paint has always placed strong emphasis on innovation to provide better coating solutions to its customers. For decades, the Japan-based brand has been one of the ...
via Bing News