期刊
ACS NANO
卷 12, 期 1, 页码 416-424出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.7b06590
关键词
hierarchical coatings; graphene oxide; silicone; flame detecting/warning sensor; temperature-responsive resistance change; synergistic flame retardancy
类别
资金
- National Natural Science Foundation of China [51203038, 51403047]
- Zhejiang Provincial Natural Science Foundation [LY15E030015, LY18E030005]
- Project for the Innovation of High Level Returned Overseas Scholars in Hangzhou
Design and development of smart sensors for rapid flame detection in postcombustion and early fire warning in precombustion situations are critically needed to improve the fire safety of combustible materials in many applications. Herein, we describe the fabrication of hierarchical coatings created by assembling a multilayered graphene oxide (GO)/silicone structure onto different combustible substrate materials. The resulting coatings exhibit distinct temperature-responsive electrical resistance change as efficient early warning sensors for detecting abnormal high environmental temperature, thus enabling fire prevention below the ignition temperature of combustible materials. After encountering a flame attack, we demonstrate extremely rapid flame detection response in 2-3 s and excellent flame self-extinguishing retardancy for the multilayered GO/silicone structure that can be synergistically transformed to a multiscale graphene/nanosilica protection layer. The hierarchical coatings developed are promising for fire prevention and protection applications in various critical fire risk and related perilous circumstances.
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