Journal
CHEMICAL ENGINEERING JOURNAL
Volume 454, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2022.140161
Keywords
Fire alarm; Flame retardancy; MXene; Contact; non-contact fire response; Large-scale wireless fire warning
Categories
Ask authors/readers for more resources
In this study, a biobased, durable, reusable, and highly sensitive fire warning composite was developed. It exhibits excellent thermal stability and fire safety, and can provide reliable warning responses under both direct flame attack and non-contact fire threat. It also has attractive flame position detection capability.
Early fire warning sensors are critically vital to avoid the potential fire accidents for preventing huge life and economic losses, however, currently available fire warning materials work only under direct fire/smoke exposure or relatively high temperature with poor sensitivity. Herein, a biobased durable, reusable and highly sensitive fire warning composite (CTM) was developed using casein as the film-forming agent and dopant, MXene (Ti3C2Tx) as the conductive skeleton, and tannic acid as the crosslinking agent and free radical scavenger. Notably, the resultant CTM composite exhibits mechanically flexible properties, excellent thermal stability (T10% of 239.6 degrees C) and superb fire safety (total heat release (THR), total smoke production (TSP) and CO production rate of sensor are only 1.35 MJ/m2, 0.19 m2 and 0.42 mg/s, respectively). More importantly, the CTM presents reliable and rapid cycle warning responses under both direct flame attack and non-contact fire threat. Under continuous exposure to flame, it demonstrates an ultra-fast response time (982 ms), a long-time stable alert (93 s), and a repeatable warning ability. Under the impact of repetitively approaching flame, it exhibits consistent distance-dependent changes in resistance within 3 s, affording attractive accessibility to detect flame position. Moreover, this CTM composite can easily be coated on flexible textiles to develop a large-scale wireless real-time fire alarming system that can deliver the monitored signal to remote sites within only 3 s, thus it provides a potential application prospect in constructing smart fire-safe buildings.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available