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

 

Get on-line education from the Pro Video Learning Series.

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.

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


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.


Jotun Paints Inc.
Jotachar JF750 - The Time Saving Solution

The only mesh free solution for jet fire scenarios. Jotachar saves installation time and material costs - the next generation of epoxy passive fire protection.


Hempel (USA) Inc.
Hempel Protective Coatings

Wider range of Hempel coatings now meet NORSOKs exacting M-501 standard. Proven high performance to protect your assets. Contact us at protective@hempel.com to find out more.


Modern Safety Techniques
Modern Safety Techniques

See our Low Temperature Catalyst for your CO removal needs. Help to provide your workers with safe, comfortable breathing air!


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

Join SSPC and Enhance
Your Career !


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.


Specialty Products, Inc. (SPI)
Polyurea & Polyurethane Spray Foam Training

SPI is committed to industry leading technical training for polyurea & polyurethane spray foam professionals. Attendees receive hands-on, in-depth training for using and troubleshooting plural-component equipment, spray guns, machine hoses & parts.


Carboline Company
Fireproofing Solutions

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


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.

 
 
 
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 2000-2016, 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