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Author

Meriem Amina Fertassi

Bio: Meriem Amina Fertassi is an academic researcher from École Normale Supérieure. The author has contributed to research in topics: Thermal decomposition & Scanning electron microscope. The author has co-authored 2 publications.

Papers
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Journal ArticleDOI
TL;DR: In this article, a novel Intermittent, Spray Coating, Draying, and Mixing (ISCDM) method is introduced to prepare ammonium perchlorate (AP) core-shell composites.

14 citations

Journal ArticleDOI
TL;DR: Polyester-based polyurethane elastomers have been established to be effective binders for composites with improved performance as discussed by the authors. Chemical compatibility testing is a significant part of the procedure.
Abstract: Polyester-based polyurethane elastomers have been established to be effective binders for composites with improved performance. Chemical compatibility testing is a significant part of the procedure...

8 citations


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Journal ArticleDOI
TL;DR: In this article , the effect of nanothermites on AP thermal decomposition was investigated and the results revealed that the characteristic XRD signals of phase compositions remain unchanged, indicating that the ball-milling and chemical synthesis processes do not damage the chemical structure of the main components.

8 citations

Journal ArticleDOI
TL;DR: In this paper , columnar, flower-like, bubble-like and teardrop-shaped Cu/GO nanocomposites were fabricated via a water-solvent thermal method and high temperature calcination technique using deionized water (H2O), methanol (CH3OH), ethanol (CH 3CH2OH) and ethylene glycol (EG) as the solvent, respectively.
Abstract: Cu nanoparticles are more active catalytically than CuO nanoparticles, which have been widely studied as catalysts for organic synthesis, electrochemistry, and optics. However, Cu nanoparticles are easily agglomerated and oxidized in air. In this research, columnar, flower-like, bubble-like and teardrop-shaped Cu/GO nanocomposites were fabricated via a water-solvent thermal method and high temperature calcination technique using deionized water (H2O), methanol (CH3OH), ethanol (CH3CH2OH) and ethylene glycol (EG) as the solvent, respectively. The structures, the morphology and the catalytic performance and catalytic mechanism for thermal decomposition of ammonium perchlorate (AP) of the Cu/GO nanocomposites have been studied by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), scanning electron microscopy (SEM), nitrogen adsorption tests (BET), simultaneous thermogravimetry-differential scanning calorimetry (TGA/DSC) and thermogravimetric couplet with Fourier transform infrared spectroscopy (TGA–FTIR), respectively. The experimental results show that the morphology of the Cu/GO nanocomposites has a significant effect on the surface area and the teardrop-shaped Cu/GO nanocomposites have the largest specific surface area and the best catalytic performance among them. When 5 wt% of the Cu/GO nanocomposites was added, the decomposition temperature of AP decreased from 426.3 °C to 345.5 °C and the exothermic heat released from the decomposition of AP increased from 410.4 J g−1 to 4159.4 J g−1. In addition, the four morphological Cu/GO nanocomposites exhibited good stability, their catalytic performance for thermal decomposition of AP remained stable after 1 month in air. Excellent catalytic performance and stability were attributed to the strong catalytic activity of pure metal nanoparticles, and GO can accelerate electron movement and inhibit the agglomeration of nanoparticles, as well as the multiple effects of inhibiting the oxidation of Cu nanoparticles in air. Therefore, it has important application potential in high-energy solid propellant.

3 citations

Journal ArticleDOI
TL;DR: In this article , a green approach for the synthesis of graphene-iron oxide nanocomposite (GINC) was followed, and the kinetic characteristics for the thermal decomposition of DBP such as activation energy and frequency factor, were determined using iso-conversional approaches, including Vyazovkin's nonlinear integral with compensatory effect (VYA/CE), iterative Kissinger-Akahira-Sunose (KAS), and iterative Flynn-Wall-Ozawa (It-FWO).
Abstract: In this work, a green approach for the synthesis of graphene-iron oxide nanocomposite (GINC) was followed. FTIR, Raman, XRD and SEM analysis tools were all used to characterize the synthesized nanocomposite. Furthermore, the Differential Scanning Calorimetry (DSC) method was used to investigate the GINC's catalytic activity for the decomposition of a double base propellant (DBP). Kinetic characteristics for the thermal decomposition of DBP such as activation energy and frequency factor, were determined using iso-conversional approaches, including Vyazovkin's nonlinear integral with compensatory effect (VYA/CE), iterative Kissinger–Akahira–Sunose (It-KAS), and iterative Flynn–Wall–Ozawa (It-FWO). Based on the results obtained from the kinetic analysis, the introduction of GINC has reduced the activation energy of the pristine DBP (approximately 230 kJ/mol) by 40 kJ/mol, showing that this addition has good catalytic activity on the thermal degradation of DBP. Additionally, the results showed that the critical ignition temperature is augmented from 187.1 to 199.6 °C, when DBP is doped with 3% GINC highlighting the fact that GINC enhanced the thermal safety of DBP.

2 citations