PaintSquare.com


The First Word in Protective & Marine Coatings

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

JPCL FREE Trial

Paint and Coatings Industry News

Main News Page


Concrete Coating Dissolves Pollutants

Thursday, May 31, 2012

More items for Coating Materials

Comment | More

Bridges, buildings and other concrete structures may soon be taking a large bite out of the air pollutants around them with a new photocatalytic coating being developed by researchers in Spain.

The coatings are based on nanoparticles that interact with sunlight and trigger a chemical reaction that disintegrates certain air pollutants, report the developers, led by a team at the UPNA-Public University of Navarre.

 The Ecofotomat development team
The team behind Ecofotomat says its final product will be as paint-like as possible: able to be applied on site, affordable and weatherproof.

The coatings are the result of the Ecofotomat project, a collaboration that began in 2010 involving the university, L’Urederra Technology Centre and the construction company Obras y Servicios TEX S.L.

L’Urederra manufactures and adapts the nanoparticles for use in coatings, and TEX provides the concrete and technical specifications for the building material. Spain’s Ministry of Education and Science and the European Regional Development Fund (ERDF) are also supporting the project.

Concrete Paint

The goal is to get the coating out of the lab and into actual service on a variety of construction materials and projects as soon as possible. The initial focus has been on a coating for concrete.

The team says the coating can reduce 90% of nitrogen oxides, 80% of hydrocarbons, and 75% of carbon monoxides to which it is exposed.

Reports of pollution-eating roof tiles, building wraps, pavement treatments and similar products have become widespread in recent years. But many of these are composite materials or clear sprays. The new coating, its developers say, is different.

“There are ceramics that have these types of coatings, but here we are working with concrete and with liquid solutions, because we want the final coating to resemble a paint as much as possible: one that can be applied on site, has a cost that is not too high, and is sufficiently tough to withstand the elements,” says researcher Javier Goicoechea.

He adds: “The good thing is that we are talking about very thin coatings of less than a micron (a millionth part of a meter) and which adapt very well to the profile of the material. For example, concrete is always very porous, and this coating will cause the whole porous surface to become active when the sunlight hits it.”

‘Built-In Property’

The coating can also degrade certain chemical compounds that become attached to the surface, thereby hampering the spread of bacteria and fungi. However, the mechanism is not like conventional antibacterial coatings that use a slow-release additive. Eventually, says Goicoechea, such coatings eventually run out of the antibacterial agent and the mechanism stops working.

 The coating will cause porous surfaces to become active when exposed to sunlight.
“Concrete is always very porous, and this coating will cause the whole porous surface to become active when the sunlight hits it,” says developer and industrial engineer Javier Goicoechea.

“What we are talking about here is a material that has a built-in property: When the sunlight hits it, it produces free radicals on its surface that attack the air pollutants, specifically the monoxides and the nitrogen oxides.

“What we need to come up with is a matrix that is tough and permanent enough to immobilize those nanoparticles on the surface and which ensures that the coating remains in place—and all that at an affordable cost.”

Breaking Down Pollutants

The team has tested the coating by applying it over a bluish ink on concrete.

“When the concrete is exposed to the light, it is possible to see how the ink is destroyed on the area treated with the coating while remaining virtually intact on the remaining surface,” Goicoechea said.

“When the ink is broken down, we can estimate that when the light hits the surface, the coating acts and breaks down all the pollutants present in the air in the form of compounds attached to it.”

Although the coating is finished, the project has another year to run. Goicoechea would like to see it tested on a complete façade, to see how it works, ages and holds up to extreme climates.

   

Tagged categories: Bridges; Concrete; Concrete coatings and treatments; Construction; Photocatalytic coatings

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


Sherwin-Williams

Sherwin-Williams
Our 3,500 locations give you a level of service that is simply unmatched.


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


International Paint LLC
A Long Track Record of Success

  • Polyurethanes
  • Linings
  • Epoxies
  • Zincs
The Power to Protect™
1-800-589-1267


Termarust Technologies
Termarust (HR CSA) Chemically Stops
Active Corrosion

Pipeline Utility Aerial crossings coated since 1992. Termarust's (HR CSA) was used to overcoat lead paint and preserve cables, pipes and support towers.


CS Unitec
Surface Prep Tools for Hazardous Conditions

CS Unitec's Trelawny™
line of surface prep tools
is safe and efficient for
use in marine & protective coatings applications including Ex Zones & Hot Work Zones.


SAFE Systems, Inc.
Custom blast rooms
by SAFE Systems

Don't waste time and money "making do" with a "standard" design. Let us work with you to design and build the
system that best fits
your requirements.
Call 1-800-634-7278

 
 
 
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