Nanocoating helps fight furniture fires without toxic flame retardants

Photo of treated foam after burn test A thin polymer coating on foam used in furniture can prevent the spread of flames, said Dr. Jaime Grunlan, the Gulf Oil/Thomas A. Dietz Career Development Professor at Texas A&M university.

Furniture cushions are made of flammable polyurethane foam that, when burned, puddles at high temperatures, a quality called the “melt-dripping” effect that further spreads fires. Furniture foam must be treated with flame-retardant chemicals that are known to be harmful to human health and the environment. The U.S. National Fire Protection Association has estimated than upholstery and bedding were the first items ignited in an average of 17,300 fires annually, resulting in 871 civilian deaths and millions of dollars in property loss.

Grunlan said that the Photo of Dr. Jaime Grunlancoating he and his research team have developed consists of a sulfur-based polymer and chitosan, a carbohydrate polymer found in crustacean shells. This new coating could be an environmentally friendly alternative to the toxic chlorine- and bromine-based flame retardants used today in furniture foam.

"This new flame retardant nanocoating functions by generating a 'gas blanket to starve the surface of burning object of oxygen," Grunlan said. "No oxygen means no fire."

Dr. Galina Laufer, a recent graduate from Grunlan's research team, published these results in ACS Macro Letters ("Exceptionally Flame Retardant Sulfur-based Multilayer Nanocoating for Polyurethane Prepared from Aqueous Polyelectrolyte Solutions"). 

Several publications, including Chemical & Engineering News and the website treehugger.com, have reported on Grunlan's findings.

Grunlan is an associate professor in the Department of Mechanical Engineering, with joint appointments in the interdisciplinary Department of Materials Science and Engineering and the Artie McFerrin Department of Chemical Engineering. He joined the Texas A&M Engineering faculty in 2004 after receiving a bachelor's degree from North Dakota State University and a Ph.D. from the University of Minnesota. In 2007, he received the prestigious National Science Foundation (NSF) CAREER award for his research into controlling the microstructure of high aspect ratio nanoparticles (e.g., carbon nanotubes) using stimuli-responsive polymers.

In 2012, he received the L.E. Scriven Young Investigator Award from the International Society of Coating Science and Technology "for innovative and high-impact research into coating methods and materials for barrier, flame resistance and electronic applications.” He also received the 2010 Carl Dahlquist Award from the Pressure Sensitive Tape Council.

 

 

Leave a comment



Sandy said

And how toxic is this to animals, humans, and our environment? And please give facts substantiating you answers. Thanks

Jaime said

The ingredients of these coatings are not known to be toxic. This is meant to be a more healthy alternative to halogenated flame retardants that are known to bioaccumulate and lead to a variety negative health effects. This is a highly effective, water-based coating system that we expect to transform the flame retardant world.

Jaime said

The ingredients of these coatings are not known to be toxic. This is meant to be a more healthy alternative to halogenated flame retardants that are known to bioaccumulate and lead to a variety negative health effects. This is a highly effective, water-based coating system that we expect to transform the flame retardant world.