Tag Archives: Evgeniy Serebriyakov

Ceramic firefighting foam: better at extinguishing fires and nontoxic

A Dec. 14, 2015 news item on Nanowerk announces a new ceramic firefighting foam developed in Russia,

A team of chemists from ITMO University, in collaboration with research company SOPOT, has developed a novel type of firefighting foam based on inorganic silica nanoparticles. The new foam beats existing analogues in fire extinguishing capacity, thermal and mechanical stability and biocompatibility.

A Dec. 14, 2015 ITMO University press release on EurekAlert, which originated the news item, provides more details,

Fighting large-scale fires usually involves firefighting foams based on synthetic substances, such as prefluorinated surfactants, that, despite their effectiveness, are extremely toxic for living organisms. Complete biodegradation of such foams can last for more than 200 years [emphasis mine], with residues quickly penetrating deep into soil and surface water. This leads to the the accumulation of toxic elements in living organisms, such as plants, animals and men. Many countries have declined the use of such fire extinguishing agents or opted for reducing the production of such substances despite the absence of any decent alternatives.

A group of scientists from the International Laboratory of Advanced Materials and Technologies (SCAMT) at ITMO University in Saint Petersburg and research company SOPOT devised a foam, which was awarded full biodegradability and whose fire extinguishing capacity is higher than that of any existing analogue currently in use by fire fighters. After the fire is extinguished, the substance actively absorbs water, softens and falls apart into bioinert silica particles. And even when the foam accidentally enters living organisms, it does not not pose any danger to them.

“Our foam is based on silica nanoparticles, which create a polymer network when exposed to air,” says Alexander Vinogradov, deputy head of the SCAMT laboratory. “Such a network embraces and adheres to the burning object and momentarily cools it down. At the same time, the foam itself hardens. The inorganic origin of this polymer network allows it to resist temperatures above 1000 degrees Celsius, which ensures gigantic stability from the aggressive environment in the midst of a raging fire.”

“Most existing foams are made of organic materials and quickly deteriorate when temperature approaches 300 degrees Celsius. In our case, the foam creates a hard frame that not only puts out the fire, but also protects the object from re-ignition. With ordinary foams, re-ignition occurs within seconds after flame is applied to the object again.”

The scientists conducted a series of large-scale experiments of the hardening foam, including the imitation of an actual forest fire. The foam was used to create a flame retardant belt that was supposed stop the spread of the fire. The tests demonstrated that the foam easily localizes the forest fire seat and can stay active during the whole fire season.

“The flame retardant belt made of our foam will prevent the spread of any forest fire, regardless of its strength and level of complexity,” says Gennady Kuprin, head of SOPOT. “We can localize the fire and be sure that the adjacent territories will be safe. This is crucial to organize evacuation works during forest fires, where 9 of 10 people die in our and other countries.”

The standard firefighting foam can take up to 200 years before completely degrading? I hope this new foam is all they say it is and that they can get it to market. In the meantime, here’s a link to and a citation for the researchers’ paper,

Silica foams for fire prevention and firefighting by Alexander V. Vinogradov, Denis Kuprin, Iosif Abduragimov, Gennadii Kuprin, Evgeniy Serebriyakov, and Vladimir V. Vinogradov. ACS Appl. Mater. Interfaces, DOI: 10.1021/acsami.5b08653
Publication Date (Web): October 22, 2015

Copyright © 2015 American Chemical Society

This is paper is behind a paywall. But, the researchers have made an image of the foam available,

Caption: This is an electronic microscope image of hybrid silica foam. Credit: ITMO University

Caption: This is an electronic microscope image of hybrid silica foam. Credit: ITMO University

For anyone curious about SOPOT, here’s more from the company’s About page,

  “NPO Sopot” was founded in 1994 in St. Petersburg. Its creation was preceded by many years of scientific research and experimental design work done in person at the head of the firm basis of the Ministry of Defence and the Ministry of Internal Affairs of Russia, as well as, with the participation and cooperation with representatives of several institutions of the defense industry (the Sukhoi Design Bureau, Institute TRANSMASH, Academy. Zhukovsky etc.), the Ministry of Civil aviation, Fire Prevention Russian Interior Ministry, the Russian Interior Ministry VIPTSH

General Director of JSC “NPO” Sopot “Gennady Kuprin. Winner of the National Industry Award” Bison-2006 “, the grand prize Emergencies Ministry in 2005 and 2006., Awarded the” Golden Shield of the Russian economy, “international diploma” European quality “member of the International Academy of Patronage, the World Academy of Integrated Security.