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Thermal reaction properties of aluminum/copper (II) oxide/poly(vinylidene fluoride) nanocomposite

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Abstract

The thermal reaction properties of the aluminum nanoparticles/copper (II) oxide nanoparticles/poly(vinylidene fluoride) (Al-NPs/CuO-NPs/PVDF) nanocomposite (mass ratio of Al-NPs/CuO-NPs/PVDF = 20/60/20) were investigated by means of thermogravimetry–differential scanning calorimetry–mass spectrometry (TG/DSC-MS) and X-ray diffraction (XRD) analysis. Al-NPs/PVDF (mass ratio of Al-NPs/PVDF = 50/50) and CuO-NPs/PVDF (mass ratio of CuO-NPs/PVDF = 75/25) nanocomposites were also prepared as a comparison. It is observed that PVDF in the Al-NPs/PVDF nanocomposite acts as an oxidizer. The fluorine ions/fluorinated gases formed at elevated temperatures react with the Al2O3 shell leading to the formation of aluminum fluoride (AlF3). The oxide shell is degraded from the reaction between fluoride ions and Al2O3, leaving the core Al available for reaction with fluorine ions/fluorinated gases. H +2 (m/z = 2), OH+ (m/z = 17), H2O+ (m/z = 18), HF+ (m/z = 20), CF+ (m/z = 31) and CH2F+ (m/z = 33) fragments were detected in the gaseous products. For CuO-NPs/PVDF nanocomposite, oxygen was released due to the decomposition of CuO to Cu2O and then Cu metal, oxidizing hydrocarbon groups in PVDF. Species of OH+ (m/z = 17), H2O+ (m/z = 18), CO +2 (m/z = 44), C2H2F+ (m/z = 45) and HF+ (m/z = 20) were detected in the gaseous products. The final reduction product of CuO is Cu metal. It is observed that PVDF in the Al-NPs/CuO-NPs/PVDF nanocomposite acts as both oxidizer and reducer in the thermal decomposition. Below 550 °C, PVDF is oxidized by CuO-NPs and oxidizing Al-NPs at the same time, resulting mass reduction. After 550 °C, the remaining Al-NPs and copper (I)/copper (II) oxide will proceed the exothermic solid-state thermite reaction. OH+ (m/z = 17), H2O+ (m/z = 18), CO +2 (m/z = 44), C2H2F+ (m/z = 45) and HF+ (m/z = 20) were the main products of the decomposition of Al-NPs/CuO-NPs/PVDF nanocomposite.

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Acknowledgements

This work was supported by the Key Laboratory Fund (9140C370304140C37173).

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Authors and Affiliations

  1. School of Chemical Engineering, Nan**g University of Science and Technology, Nan**g, 210094, People’s Republic of China

    **angyu Li, Chuan Huang, Hongtao Yang, Yanchun Li & Yi Cheng

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  1. **angyu Li
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  2. Chuan Huang
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Correspondence to Yi Cheng.

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Li, X., Huang, C., Yang, H. et al. Thermal reaction properties of aluminum/copper (II) oxide/poly(vinylidene fluoride) nanocomposite. J Therm Anal Calorim 124, 899–907 (2016). https://doi.org/10.1007/s10973-015-5194-8

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  • DOI: https://doi.org/10.1007/s10973-015-5194-8

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