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Thermal degradations of used cotton fabrics and of cellulose: kinetic and heat transfer modeling

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Abstract

The thermal degradations of small samples of different used cotton fabrics and of cellulose, in comparison, in a thermogravimetric balance are considered under non-oxidative (100% N\(_{2}\)) or oxidative (20% O\(_{2}\), 80% N\(_{2}\)) atmospheres and for different temperature ramps (5–50 K min\(^{-1}\)). The associated kinetic parameters are determined for low temperature ramps using a differential isoconversional method or an Extended Independent Parallel Reaction model, with different reaction functions, and they are compared. Because these values of the kinetic parameters do not simulate in an appropriate way the thermal degradations of the materials at higher temperature ramps, a heat transfer model is proposed, which brings corrections to the temperature really acting inside the samples. With these corrections, the experimental and simulated mass loss rate curves do better superimpose, which leads to values of the kinetic parameters which are independent of the temperature ramp.

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Acknowledgments

We thank Mrs. Chloée Roumegoux for the experiments concerning the thermal degradation of used cottons she did during her training period at LGRE and Mrs. Damaris Kehrli for her support during the different experiments leading to the current study. Part of this work has been supported by PHC Toubkal No 15-08 that we thank, together with Mrs. Riane Hajjami. The authors thank the anonymous referees whose comments contributed to improve a previous version of this work.

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Correspondence to Alain Brillard.

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Brillard, A., Habermacher, D. & Brilhac, JF. Thermal degradations of used cotton fabrics and of cellulose: kinetic and heat transfer modeling. Cellulose 24, 1579–1595 (2017). https://doi.org/10.1007/s10570-017-1200-6

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  • DOI: https://doi.org/10.1007/s10570-017-1200-6

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