Navigation Links
Layered security: Carbon nanotubes promise improved flame-resistant coating
Date:1/15/2014

Using an approach akin to assembling a club sandwich at the nanoscale, National Institute of Standards and Technology (NIST) researchers have succeeded in crafting a uniform, multi-walled carbon-nanotube-based coating that greatly reduces the flammability of foam commonly used in upholstered furniture and other soft furnishings.

The flammability of the nanotube-coated polyurethane foam was reduced 35 percent compared with untreated foam. As important, the coating prevented melting and pooling of the foam, which generates additional flames that are a major contributor to the spread of fires.

Nationwide, fires in which upholstered furniture is the first item ignited account for about 6,700 home fires annually and result in 480 civilian deaths, or almost 20 percent of home fire deaths between 2006 and 2010, according to the National Fire Protection Association.

The innovative NIST technique squeezes nanotubes between two everyday polymers and stacks four of these trilayers on top of each other. The result is a plastic-like coating that is thinner than one-hundredth the diameter of human hair and has flame-inhibiting nanotubes distributed evenly throughout.

The brainchild of NIST materials scientists Yeon Seok Kim and Rick Davis, the fabrication method is described in the January 2014 issue of Thin Solid Films.* Kim and Davis write that the technique can be used with a variety of types of nanoparticles to improve the quality of surface coatings for diverse applications.

The pair experimented with a variety of layer-by-layer coating methods before arriving at their triple-decker approach. All had failed to meet their three key objectives: entire coverage of the foam's porous surface, uniform distribution of the nanotubes, and the practicality of the method. Inmost of these trials, the nanotubescylinders of carbon atoms resembling rolls of chicken wiredid not adhere strongly to the foam surface.

So, Kim and Davis opted to doctor the nanotubes themselves, borrowing a technique often used in cell culture to make DNA molecules stickier. The method attached nitrogen-containing moleculescalled amine groupsto the nanotube exteriors.

This step proved critical: The doctored nanotubes were uniformly distributed and clung tenaciously to the polymer layers above and below. As a result, the coating fully exploits the nanotubes' rapid heat-dissipating capability.

Gram for gram, the resulting coating confers much greater resistance to ignition and burning than achieved with the brominated flame retardants commonly used to treat soft furnishings today. As important, says Davis, a "protective char layer" forms when the nanotube-coated foam is exposed to extreme heat, creating a barrier that prevents the formation of melt pools.

"This kind of technology has the potential to reduce the fire threat associated with burning soft furniture in homes by about a third," Davis says.


'/>"/>

Contact: Mark Bello
mark.bello@nist.gov
301-975-3776
National Institute of Standards and Technology (NIST)
Source:Eurekalert  

Related biology technology :

1. Engineer making rechargeable batteries with layered nanomaterials
2. PharmaDirections is Co-inventor on Second Issued Formulation Patent Entitled “Layered Pharmaceutical Formulations”
3. New biosensor benefits from melding of carbon nanotubes, DNA
4. Carbon nanotube forest camouflages 3-D objects
5. UCLA researchers demonstrate fully printed carbon nanotube transistor circuits for displays
6. Silicon-carbon electrodes snap, swell, dont pop
7. Carbon nanotubes can double growth of cell cultures important in industry
8. Carbon capture and storage -- new research from UKERC shows tough road ahead to realize potential
9. From lemons to lemonade: Using carbon dioxide to make carbon nitride
10. Sensing the infrared: Researchers improve IR detectors with single-walled carbon nanotubes
11. Unzipped carbon nanotubes could help energize fuel cells and batteries, Stanford scientists say
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Layered security: Carbon nanotubes promise improved flame-resistant coating
(Date:10/11/2017)... BALTIMORE, Md. (PRWEB) , ... October 11, 2017 ... ... for digital pathology, announced today it will be hosting a Webinar titled, “Pathology ... of  Advanced Pathology Associates , on digital pathology adoption best practices and how ...
(Date:10/11/2017)... ... 11, 2017 , ... Singh Biotechnology today announced that the ... its novel anti-STAT3 (Signal Transducer and Activator of Transcription 3) B VHH13 single ... the cell membrane and bind intracellular STAT3 and inhibit its function. Dysregulation of ...
(Date:10/10/2017)... -- International research firm Parks Associates announced today that ... TMA 2017 Annual Meeting , October 11 in Scottsdale, Arizona ... market and how smart safety and security products impact the competitive landscape. ... Parks Associates: Smart Home Devices: Main Purchase ... "The residential security market has experienced continued growth, ...
(Date:10/9/2017)... ... ... The award-winning American Farmer television series will feature 3 Bar Biologics in ... 8:30aET on RFD-TV. , With global population estimates nearing ten billion people by ... feed a growing nation. At the same time, many of our valuable resources are ...
Breaking Biology Technology:
(Date:4/5/2017)... April 4, 2017 KEY FINDINGS ... expand at a CAGR of 25.76% during the forecast ... the primary factor for the growth of the stem ... https://www.reportbuyer.com/product/4807905/ MARKET INSIGHTS The global stem cell ... application, and geography. The stem cell market of the ...
(Date:3/30/2017)... , March 30, 2017  On April 6-7, ... Hack the Genome hackathon at Microsoft,s headquarters ... two-day competition will focus on developing health and wellness ... Hack the Genome is the first ... tremendous. The world,s largest companies in the genomics, tech ...
(Date:3/29/2017)... -- higi, the health IT company that operates the largest ... , today announced a Series B investment from BlueCross ... new investment and acquisition accelerates higi,s strategy to create ... health activities through the collection and workflow integration of ... and secures data today on behalf of over 36 ...
Breaking Biology News(10 mins):