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Chinese researchers have created a groundbreaking type of fire-resistant wallpaper equipped with an alarm system, designed to potentially replace conventional wall coverings and reduce the risk of home fires. inhauscreative/Getty ImagesA minor flame can escalate into a devastating house fire within moments, primarily due to the combustible synthetic materials found in household decor and wall treatments.
"In today's homes, where synthetic materials are widespread, residents typically have only 2 to 3 minutes to escape," said John Drengenberg, Consumer Safety Director at Underwriters Laboratories (UL), in an interview with This Old House.
Chinese researchers have recently engineered a non-toxic, flame-resistant "smart" wallpaper that activates an alarm upon reaching a specific temperature. The project, led by Ying-Jie Zhu of the Shanghai Institute of Ceramics at the Chinese Academy of Sciences, was detailed in the March 13, 2018, edition of ACS Nano.
By crafting a mesh of nanowires as thin as a sheet of printer paper, the team incorporated glass fibers for fireproofing and processed the material through a paper-making machine to produce a sleek, pliable wallcovering.
The nanowire fibers are connected to a blend of graphene oxide and water, transformed into ink and printed on the wallcovering's underside. The graphene oxide is crucial for heat detection, as it begins conducting electricity at temperatures above 264 degrees Fahrenheit (129 degrees Celsius), triggering a connected fire alarm and warning light.
To ensure the heat-sensitive ink remains functional under extreme temperatures, it is coated with polydopamine, a protective chemical. This layer allows the ink to endure fire conditions for up to 5 minutes before degrading.
This advanced nano-enhanced wallpaper could eventually replace traditional cellulose-based wallcoverings, which are derived from plant fibers and highly flammable. Critics note that production costs are currently high, and researchers must find ways to make the material affordable for consumers. During development, Zhu's team produced enough material to cover a single wall (approximately 54 square feet or 5 square meters). While there is no confirmed release date, Zhu emphasized the potential to "save lives and minimize property damage during fires" in a statement to Science News for Students.
Functional smoke alarms reduce the risk of fatalities in home fires by 50%. Most smoke alarm failures occur due to disconnected, missing, or dead batteries, with dead batteries accounting for about 25% of all malfunctions.
