Sustainable biomass-based composite biofilm: Sodium alginate, TEMPO-oxidized chitin nanocrystals, and MXene nanosheets for fire-resistant materials and next-generation sensors
[Display omitted] •Sustainable, flexible, and flame-retardant biofilm (STM) fabricated via facile evaporation-induced self-assembly.•Optimized biofilms exhibit ∼3.0x tensile strength and ∼11.0x Young's modulus compared to pure SA film.•STM-40 film displayed superior flame alarm response (0.6 s)...
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Veröffentlicht in: | Journal of colloid and interface science 2024-01, Vol.654, p.795-804 |
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Format: | Artikel |
Sprache: | eng |
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•Sustainable, flexible, and flame-retardant biofilm (STM) fabricated via facile evaporation-induced self-assembly.•Optimized biofilms exhibit ∼3.0x tensile strength and ∼11.0x Young's modulus compared to pure SA film.•STM-40 film displayed superior flame alarm response (0.6 s) and continuous signal alarm (492 s).•STM-40 achieves high limiting oxygen index (45.0 %) and >90.1 % reduction in peak heat release rate.•Mechanism proposed for flame-retardant properties of STM films.
Efficient utilization of natural biomass for the development of fireproof materials and next-generation sensors faces various challenges in the field of fire safety and prevention. In this study, renewable sodium alginate (SA), TEMPO-oxidized chitin nanocrystals (TOChNs), and MXene nanosheets were employed to fabricate a sustainable, flexible, and flame-retardant composite biofilm, donated as STM, utilizing a simple and environmentally friendly evaporation-induced self-assembly technique. The incorporation of SA, TOChNs, and MXene in a weight ratio of 50/10/40 led to improved mechanical properties of the resulting STM-40 films, as evidenced by increased tensile strength and Young's modulus values of approximately 36 MPa and 4 GPa, respectively. Notably, these values were approximately 3 and 11 times higher than those observed for the pure SA film. Moreover, the STM-40 films demonstrated highly sensitive fire alarm capabilities, exhibiting a superior flame alarm response time of 0.6 s and a continuous alarm time of approximately 492 s when exposed to flames. The STM exhibited exceptional flame retardancy due to the synergistic carbonization between MXene and SA/TOChNs, resulting in a limiting oxygen index of 45.0 %. Furthermore, its maximum heat release rate decreased by over 90.1 % during the test. This study presents a novel approach for designing and developing fire-retardant fire alarm sensors by utilizing natural biomass. |
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ISSN: | 0021-9797 1095-7103 |
DOI: | 10.1016/j.jcis.2023.10.080 |