PaintSquare.com
      | Connect Follow us on Twitter Like us on Facebook
About | Subscribe | Advertise
  

 

Download our free Marine Industry Coating Systems eResource Book

Paint and Coatings Industry News

Main News Page


Hull Coating Shakes Off Marine Scum

Monday, February 4, 2013

More items for Coating Materials

Comment | More

A novel coating will allow a ship to shed unwanted bacteria and marine scum with the flick of a switch, according to a group of engineers at Duke University.

Duke University
Phanindhar Shivapooja and Qiming Wang / Duke University

The coated surface repels bacteria at a microscopic level, researchers say. This is an illustration of the material at work.

The material, which can be applied like paint to a ship’s hull, will help keep the surface free from buildup that increases drag, reduces the vessel’s energy efficiency, and blocks or clogs undersea sensors, the engineers said in a news release.

The research, funded by the U.S. Office of Naval Research, was recently published in the journal Advanced Materials.

How does it Work?

The material works by physically moving at the microscopic level, knocking the bacteria away.

horse
Seviwurst / Wikimedia Commons

Like horses shake off pesky flies by twitching their skin, ships may soon be able to shed bacterial buildup in a similar fashion, Duke University researchers say. 

“We have developed a material that ‘wrinkles’ or changes its surface in response to a stimulus, such as stretching or pressure or electricity,” said engineer Xuanhe Zhao, assistant professor in Duke’s Pratt School of Engineering.

“This deformation can effectively detach biofilms and other organisms that have accumulated on the surface.”

The development is an alternative to bacteria-killing paints, which can contain heavy metals or other toxic chemicals that might accumulate in the environment and harm fish or other marine organisms, the researchers said.

Materials with similar properties could also be used to keep artificial joint implants or water purification membranes free from biofilm.

Mimicking Nature

“Nature has offered many solutions to deal with this buildup of biological materials that we as engineers can try to recreate,” said Gabriel López, professor of biomedical engineering and mechanical engineering and materials science.

“For example, the hair-like structures known as cilia can move foreign particles from the lungs and respiratory tract,” Lopez said. “In the same manner, these types of structures are used by mollusks and corals to keep their surfaces clean. To date, however, it is been difficult to reproduce the cilia, but controlling the surface of a material could achieve the same result.”

Lopez notes that once bacteria have taken up residence on a surface, they often attract larger organisms, such as seaweed and larva of other marine life, which can led to further buildup.

“It is known that bacterial films can recruit other organisms, so stopping the accumulation process from the beginning in the first place would make a lot of sense,” Lopez said.

   

Tagged categories: Coatings technology; Marine; Marine Coatings; Research

Comment Join the Conversation:

Sign in to our community to add your comments.

Wasser High-Tech Coatings Inc.
Wasser Coatings Protect

Wasser Coatings offer a complete range of Moisture Cure Urethane (NEPCOAT approved) systems in addition to Polyurea membranes and linings(NSF).
www.wassercoatings.com


Jessup Manufacturing Company
More Traction for Extreme Marine Conditions

Jessup Safety Track® 3800 Military Grade peel-and-stick non-skid tapes and treads provide extra slip resistance for decks. MIL-PRF-24467C Type XI, Black & Gray.


Sherwin-Williams
Sherwin-Williams Protective & Marine Coatings

With 4,000 distribution points and 3,700+ years of experience, Sherwin-Williams delivers the products, support and expertise you need, right where you need it.


International Paint LLC
Premium Low VOC Polyurethane Finish

AkzoNobel introduces Interthane 990V as a 250 g/l HAPS free polyurethane with outstanding color and gloss retention. 990V is fast curing and applicator friendly.


Clemco Industries Corp.
Powerful Protection in a Small Package

Mounts inside blast helmet, alerts operator to dangerous breathing-air condition by audible, visual, and vibratory alarms. Easily calibrated, battery operated.


Carboline Company
Fireproofing Solutions

Pyroclad® X1 Thermo-Lag® Pyrocrete® – protecting against hydrocarbon and jet fires, explosions, and cryogenic spills.


Modern Safety Techniques
Modern Safety Techniques

With our unique LTCat, we can help to provide clean, safe breathing air to your workers. Take a look at our Breathing Air Systems, we supply at least twice as much charcoal as our competitors! Modern


SSPC: The Society for Protective Coatings
http://www.sspc.org/

Join SSPC and Enhance
Your Career !


Polyval Coatings
Polyflex® Polyurea Linings

Polyflex™ new Polyurea Geotextile Membrane System has been specifically engineered to protect the environment in containment applications.
www.polyflexlinings.com


Specialty Products, Inc. (SPI)
SIGN UP TODAY – HANDS ON TRAINING

After 40 years in the coating business, SPI has trained more industry professionals than any other polyurea manufacturer. Now offering more classes at more locations than ever before!

 
 
 
Technology Publishing

The Technology Publishing Network

The Journal of Protective Coatings & Linings (JPCL) PaintSquare
Durability + Design Paint BidTracker

 
EXPLORE:      JPCL   |   PaintSquare News   |   Interact   |   Buying Guides   |   Webinars   |   Resources   |   Classifieds
REGISTER AND SUBSCRIBE:      Free PaintSquare Registration   |   Subscribe to JPCL   |   Subscribe to PaintSquare News
MORE:      About PaintSquare.com   |   Privacy policy   |   Terms & conditions   |   Site Map   |   Search   |   Contact Us
 

© Copyright 2000-2015, Technology Publishing / PaintSquare, All rights reserved
2100 Wharton Street, Suite 310, Pittsburgh PA 15203-1951; Tel 1-412-431-8300; Fax 1-412-431-5428; E-mail webmaster@paintsquare.com