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Study on flame retardancy and mechanical properties of paraffin/stearic acid-based composite for preventing coal spontaneous combustion

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Abstract

To make paraffin as the inhibitor for the secundine ball shell material better apply in the field of coal mine fire prevention, the melting system with the ratio of paraffin to stearic acid 4:1 was used as the matrix material, three materials with different mass percentages were chosen as additives. The influence of samples on the flame-retardant performance and stability of the matrix material was examined using cone calorimetry and thermogravimetric analysis, then combined with material mechanics performance to determine the best proportion composite. The results show that the flame retardancy of the matrix is improved by adding three kinds of materials, but the stability of chlorinated paraffin is poor; and when the mass percentage of Zn3B6O12·3.5H2O and Al (OH) 3 is 15%, the flame retardancy and mechanical properties of the composite are significantly improved: the flame performance index increased from 0.012 to 0.193 m2 s kW−1, and the maximum stress increased from 1.776 to 4.578 Mpa. Besides, the presence of composite materials reduces the amount of CO generated during the low-temperature oxidation of coal before 180 °C, indicating that it has a certain inhibitory effect on the low-temperature oxidation process of coal.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (Grant No. 52074285) and the Open Project Funded by the “Tuohai Cup” Enterprise (Grant No.2021TH08).

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Authors and Affiliations

  1. School of Safety Engineering, China University of Mining and Technology, Xuzhou, 221116, Jiangsu, China

    Chenchen Yin, Shuguang Jiang, Zhengyan Wu, Hao Shao, Zhencheng Zhao & Senlin Pan

  2. State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology, Xuzhou, 221116, Jiangsu, China

    Shuguang Jiang

  3. Jiangsu Key Laboratory of Coal-based Greenhouse Gas Control and Utilization, China University of Mining & Technology, Xuzhou, 221116, Jiangsu, China

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  1. Chenchen Yin
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    • Contributions

    CY: Conceptualization, Methodology, Writing—original draft. SJ: Supervision, Funding acquisition. ZW: Writing—review and editing. CX: Data processing, Investigation. XX: Data curation, Editing. HS: Material acquisition. ZZ: Data curation. SP: Data curation.

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    Correspondence to Zhengyan Wu.

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    Yin, C., Jiang, S., Wu, Z. et al. Study on flame retardancy and mechanical properties of paraffin/stearic acid-based composite for preventing coal spontaneous combustion. J Therm Anal Calorim 148, 2297–2311 (2023). https://doi.org/10.1007/s10973-022-11884-6

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