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Studies on thermokinetic and reactive mechanism of graphdiyne-based NC composite via multi isoconversional methods and model reconstruction

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Abstract

In this work, graphdiyne (GDY) is used for the first time as the catalyst for the pyrolysis process of nitrocellulose (NC). By DSC and TG-IR-MS results, the compatibility and the possible catalytic mechanism of GDY on NC are investigated. The kinetic triplet parameters of the GDY/NC complexes were determined based on the isoconversional analysis (using the KAS, FWO, and Friedman methods), whereas the experimental reaction model of the GDY/NC pyrolysis was optimized and re-established by introducing a newly modified function with result of f(α) = 9.138α0.838(1)2.343. Compared with pristine NC, the GDY/NC complexes exhibit a lower peak temperature, an increased heat release, and a lower energy barrier, owing to the good catalytic characteristics of GDY. This was also demonstrated via the TG-IR-MS measurements, which revealed how GDY accelerates the rupture of the –O–NO2 bond and the secondary self-catalytic reaction.

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Acknowledgments

This work was supported by National Natural Science Foundation of China (Nos. 21673179 and 21978232), Program for the Doctoral Scientific Research Foundation of Xi’an University of Technology (No. 109-451117004), Natural Science Basic Research Program of Shaanxi (Nos. 2018JQ2077, 2018GY-125, 2019NY-201 and 2021JM-322), and Scientific Research Project of Shaanxi Provincial Department of Education (No. 19JK0595).

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Correspondence to Ningning Zhao.

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Zhao, N., Yao, E., Ma, H. et al. Studies on thermokinetic and reactive mechanism of graphdiyne-based NC composite via multi isoconversional methods and model reconstruction. Cellulose 29, 4365–4379 (2022). https://doi.org/10.1007/s10570-022-04569-8

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  • DOI: https://doi.org/10.1007/s10570-022-04569-8

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