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Thermal hazard evaluation of carbon nanotubes with sulfuric acid by DSC

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Abstract

Many concerns over unsafe or unknown properties of multi-walled carbon nanotubes (MWNTs) have been raised. The thermal characteristics regarding stability would represent potential hazards during the production or utilization stage and could be determined by calorimetric tests for various thermokinetic parameters. Differential scanning calorimetry (DSC) was employed to evaluate the thermokinetic parameters for MWNTs at various compositions.

Thermoanalytical curves showed that the average heat of decomposition (ΔH d) of the MWNTs samples in a manufacturing process was about 31,723 J g−1, by identifying them as an inherently hazardous material. In this study, significant thermal analysis appeared in the presence of sulfuric acid (H2SO4). From the DSC experiments, the purification process of MWNTs could induce an unexpected reaction in the condition of batch addition with reactants of H2SO4. The results can be applied for designing emergency relief system and emergency rescue strategies during a perturbed situation or accident.

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Authors and Affiliations

  1. Department of Safety, Health and Environmental Engineering, National Yunlin University of Science and Technology (NYUST), 123, University Rd., Sec. 3, Douliou, Yunlin, Taiwan, 64002, ROC

    C. -W. Chang, Y. -C. Chou & C. -M. Shu

  2. Doctoral Program, Graduate School of Engineering Science and Technology, NYUST, 123, University Rd., Sec. 3, Douliou, Yunlin, Taiwan, 64002, ROC

    J. -M. Tseng

  3. Chienkuo Technology University, 1, Chieh Shou N. Rd., Changhua, Taiwan, 50094, ROC

    M. -Y. Liu

Authors
  1. C. -W. Chang
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  2. Y. -C. Chou
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  3. J. -M. Tseng
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  4. M. -Y. Liu
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  5. C. -M. Shu
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Correspondence to C. -M. Shu.

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Chang, C.W., Chou, Y.C., Tseng, J.M. et al. Thermal hazard evaluation of carbon nanotubes with sulfuric acid by DSC. J Therm Anal Calorim 95, 639–643 (2009). https://doi.org/10.1007/s10973-008-9163-3

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  • DOI: https://doi.org/10.1007/s10973-008-9163-3

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