Serendipity discovery of fire early warning function of chitosan film

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 approximat...

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Veröffentlicht in:Carbohydrate polymers 2022-02, Vol.277, p.118884-118884, Article 118884
Hauptverfasser: Wang, Yong, Chen, Gongqing, Yang, Fangzhou, Luo, Zihao, Yuan, Bihe, Chen, Xianfeng, Wang, Liancong
Format: Artikel
Sprache:eng
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Zusammenfassung: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. [Display omitted]
ISSN:0144-8617
1879-1344
DOI:10.1016/j.carbpol.2021.118884