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Compatibility and thermal decomposition mechanism of nitrocellulose/Cr2O3 nanoparticles studied using DSC and TG-FTIR

机译：使用DSC和TG-FTIR研究硝酸纤维素/ Cr2O3纳米粒子的相容性和热分解机理

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摘要

Nano metal oxides are common combustion catalysts for enhancing the burning rate of solid propellants. Cr2O3 nanoparticles (NPs) are efficient combustion catalysts for the pyrolysis of energetic components. In this study, Cr2O3 NPs were synthesized via a modified sol-gel method and further used for studying the thermal decomposition of nitrocellulose (NC). Differential scanning calorimetry (DSC) and thermogravimetry-Fourier-transform infrared spectroscopy (TG-FTIR) analyses indicate that the Cr2O3 NPs can be safely used with NC and the mechanism of the reaction between Cr2O3/NC and pure NC follows the Avrami-Erofeev equation: f(alpha) = 3(1 - alpha)[-ln(1 - alpha)](1/3)/2. The peak temperature and activation energy (Ea) for the thermal decomposition of Cr2O3/NC are lower than those of pure NC. NO2 was detected at a lower temperature after NC was mixed with Cr2O3 NPs; this indicated the catalytically accelerated bond cleavage of NC by Cr2O3 NPs.
机译：纳米金属氧化物是用于增强固体推进剂的燃烧速率的常见燃烧催化剂。 CR2O3纳米颗粒（NPS）是高能量组分热解的有效燃烧催化剂。 在该研究中，通过改性溶胶 - 凝胶法合成Cr2O3 NP，并进一步用于研究硝酸纤维素（NC）的热分解。 差分扫描量热法（DSC）和热重率 - 傅里叶变换红外光谱（TG-FTIR）分析表明CR2O3 NPS可以安全地与NC安全使用，CR2O3 / NC和纯NC之间的反应机制遵循AVRAMI-EROFEEV方程 ：F（α）= 3（1 - α）[ - LN（1 - alpha）]（1/3）/ 2。 CR2O3 / NC的热分解的峰值温度和激活能量（EA）低于纯Nc的峰值温度和激活能量（EA）。 将NC与CR2O3 NPS混合后，在较低的温度下检测到NO 2; 这表明CR2O3 NPS的NC催化加速键切割。

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  • 来源
    《RSC Advances》 |2019年第7期|共11页
  • 作者

    Guo Yu; Zhao Ningning; Zhang Ting; Gong Hujun; Ma Haixia; An Ting; Zhao Fengqi; Hu Rongzu;

  • 作者单位

    Northwest Univ Sch Chem Engn Xian 710069 Shaanxi Peoples R China;

    Northwest Univ Sch Chem Engn Xian 710069 Shaanxi Peoples R China;

    Northwest Univ Sch Chem Engn Xian 710069 Shaanxi Peoples R China;

    Northwest Univ State Key Lab Continental Dynam Xian 710069 Shaanxi Peoples R China;

    Northwest Univ Sch Chem Engn Xian 710069 Shaanxi Peoples R China;

    Xian Modern Chem Res Inst Sci &

    Technol Combust &

    Explos Lab Xian 710065 Shaanxi Peoples R China;

    Xian Modern Chem Res Inst Sci &

    Technol Combust &

    Explos Lab Xian 710065 Shaanxi Peoples R China;

    Xian Modern Chem Res Inst Sci &

    Technol Combust &

    Explos Lab Xian 710065 Shaanxi Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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