Serendipity discovery of fire early warning function of chitosan film

Yong Wang; Gongqing Chen; Fangzhou Yang; Zihao Luo; Bihe Yuan; Xianfeng Chen; Liancong Wang

doi:10.1016/j.carbpol.2021.118884

Serendipity discovery of fire early warning function of chitosan film

Carbohydr Polym. 2022 Feb 1:277:118884. doi: 10.1016/j.carbpol.2021.118884. Epub 2021 Nov 13.

Authors

Yong Wang¹, Gongqing Chen¹, Fangzhou Yang¹, Zihao Luo¹, Bihe Yuan², Xianfeng Chen¹, Liancong Wang³

Affiliations

¹ School of Safety Science and Emergency Management, Wuhan University of Technology, Wuhan 430070, China.
² School of Safety Science and Emergency Management, Wuhan University of Technology, Wuhan 430070, China. Electronic address: [email protected].
³ State Key Laboratory of Coal Mine Safety Technology, CCTEG Shenyang Research Institute, Fushun 113122, China.

PMID: 34893287
DOI: 10.1016/j.carbpol.2021.118884

Abstract

Transparent chitosan (CS) film is prepared and its application in high temperature/fire warning is discussed. NaCl-doped chitosan (CS-NaCl) film shows excellent performance in real-time temperature monitoring and fire warning. The temperature warning of CS-NaCl film can be triggered under approximately 50 °C, and it has a good repeatable warning performance under high-temperature conditions. The CS composite film exhibits an ultra-sensitive (0.4 s) warning under fire attacking. A possible electrical conduction and fire-alarm mechanisms are proposed. The addition of NaCl increases the number of charge carriers, which improves the ionic conductivity of the composite film. This study provides a possibility for the application of CS in the field of fire warning.

Keywords: Chitosan; Fire warning; Proton conductive; Sodium chloride.