PaintSquare.com


The First Word in Protective & Marine Coatings

A Product of Technology Publishing / PaintSquare
JPCL | PaintSquare News | Durability + Design | Paint BidTracker

Free Download of

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

some of the most important bridges in the country; learn about our NEPCOAT-approved system and our entire range of MCU & Polyurea coatings. 1-800-627-2968 www.wassercoatings.com


Polyval Coatings
Polyflex® Polyurea Linings

exhibit outstanding versatility in use; providing abrasion resistance, superior seamless waterproofing and high-chem corrosion protection. www.polyflexlinings.com


Sherwin-Williams
Heat-FLex® Hi-Temp 1200

Improved Corrosion
Resistance
Enhanced Durability
Faster Shop Throughput


BASF
New resins from BASF will have metals loving water:

Excellent corrosion resistance, low VOC, high gloss, thin films basf.us/industrialcoatings
polyorders@basf.com
800-231-7868


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

Join SSPC and Enhance
Your Career !


Mitsubishi Gas Chemical America
Performance Amine 1,3-BAC

A highly reactive cycloaliphatic diamine offering superior performance. Reasonable cost and curing efficacy makes it suitable for all types of epoxy resin applications.


Minerals Research & Recovery

HIGH PERFORMANCE ABRASIVES


“Made in the USA!”

Why recycle waste from other countries? Go FASTER, CLEANER, at 1/3 THE COST with MR&R “All-American” Sharpshot®HP!!

WATCH THE VIDEO

 
 
 
Technology Publishing

The Technology Publishing Network

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

 
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 2000-2014, 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