Exploring the Effect of Ammonium Nitrate on the Thermal Stability and Decomposition kinetics of Dual Nitrocellulose-Nitrostarch-Based Energetic Composites

FirePhysChem, Год журнала: 2025, Номер unknown

Опубликована: Янв. 1, 2025

Язык: Английский

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Unraveling the role of ammonium perchlorate on the thermal decomposition behavior and kinetics of NC/DEGDN energetic composite

Thermochimica Acta, Год журнала: 2022, Номер 716, С. 179305 - 179305

Опубликована: Авг. 4, 2022

Язык: Английский

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Elaboration, spectroscopic characterization, and study of the thermal decomposition process of energetic composites based on ammonium perchlorate and dual-biopolymers

FirePhysChem, Год журнала: 2023, Номер 4(2), С. 166 - 176

Опубликована: Окт. 17, 2023

The current study presents a successful elaboration and characterization of an innovative energetic composite based on nitrocellulose nitrostarch (NC-NPS) dual-biopolymers, ammonium perchlorate (AP). A pre-establishment the optimal formulation AP@NC-NPS has been determined through theoretical estimation ballistic performance via CEA-NASA software. obtained composites were then fully characterized by FTIR, DSC, TGA analyses. IR-spectroscopy depicted presence all characteristic groups ester nitrates, revealing that incorporation AP did not alter chemical structure dual-biopolymers. thermal analysis demonstrated mutual catalytic effect between NC-NPS biopolymeric matrix supported decrease maximum degradation temperatures observed for decomposition stages after oxidizer. thermo-kinetic investigation, carried out using linear non-linear isoconversional approaches (TAS, VYA/CE) considerable reduction in activation energy values, highlighting, once again role improvement thermolysis process prepared composite.

Язык: Английский

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Unraveling the characteristics and pyrolysis mechanism of diethylene glycol dinitrate plasticized nitrocellulose supplemented with organic stabilizers

Journal of Analytical and Applied Pyrolysis, Год журнала: 2024, Номер 180, С. 106564 - 106564

Опубликована: Май 26, 2024

Язык: Английский

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The production and characterization of bacterial cellulose pellicles obtained from oil palm frond juice and their conversion to nanofibrillated cellulose

Carbohydrate Polymer Technologies and Applications, Год журнала: 2023, Номер 5, С. 100327 - 100327

Опубликована: Май 28, 2023

This study explored the potential of using oil palm frond (OPF) juice as a fermentation medium for bacterial cellulose (BC) synthesis by Acetobacter xylinum 0416, followed its conversion into nanofibrillated (BNFC). The effect adding nitrogen sources to OPF on BC yield and thickness was investigated, with corn steep liquor (CSL) showing most promising results, increasing six- four-fold, respectively. resulting BC-OPF+CSL pellicles demonstrated excellent thermal stability, high crystallinity large swelling ratio. also investigated BNFC either homogenization, ultrasonication, or combination both. ultrasonication homogenization produced best disintegrating fibers diameter 13–21 nm water retention value 6105%. Low stability were observed, indicating successful fibrillation. These findings suggest that is alternative production combining simple safe method converting BNFC. research offers eco-friendly solution value-added products such

Язык: Английский

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Promising Energetic Polymers from Nanostructured Bacterial Cellulose

Polymers, Год журнала: 2023, Номер 15(9), С. 2213 - 2213

Опубликована: Май 7, 2023

This study investigated the nitration of nanostructured bacterial cellulose (NBC). The NBC, obtained using symbiotic Medusomyces gisevii Sa-12 as microbial producer and then freeze-dried, was nitrated herein by two methods, first mixed sulphuric–nitric acids (MA) second concentrated nitric acid in presence methylene chloride (NA+MC). synthesized samples NBC nitrates (NBCNs) exhibited 11.77–12.27% nitrogen content, a viscosity 1086 mPa·s or higher, 0.7–14.5% solubility an alcohol–ester mixture, 0.002% ash. Scanning electron microscopy showed that compacted structure, with original reticulate pattern structure being preserved full. Infrared spectroscopy for functional nitro groups at 1658–1659, 1280, 838–840, 749–751 693–694 cm−1 confirmed synthesis particular. Thermogravimetric differential thermal analyses resultant NBCNs to have high purity specific heats decomposition 6.94–7.08 kJ/g. NBCN differ conceptually from plant-based having above unique 3D is retained during nitration. findings suggest can be considered use novel high-tech materials science-driven fields distinct application nitrates. sample NA+MC has ability generate organogel when it dissolved acetone. Because said property, this find classical adhesive scaffold energetic gel matrix creating promising polymers.

Язык: Английский

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Enhancing accuracy in Equivalent In-Service-Time assessment for homogeneous solid propellants: A novel temperature-independent predictive model utilizing PCA of FTIR Data

FirePhysChem, Год журнала: 2024, Номер unknown

Опубликована: Июнь 1, 2024

The present study was devoted to setting a universal T-independent predictive model of equivalent in-service-time (EIST) for homogenous solid propellant (HSP) surpass the limits van't Hoff law particularly when high aging temperatures and/or extended durations are employed in artificial plans. To achieve this objective, four double base rocket propellants (DBRP) underwent 4 months at 323.65 K, 338.65 353.65 and 368.65 with sampling conducted every 20 days. Fourier Transform Infrared spectrometry (FTIR) showed that homolytic scission O-NO2 bonds hydrocarbon chains nitrate esters main processes occurring during chemical decomposition. With heating temperature increase, decomposition becomes more predominant. Furthermore, scatter plot from Principal Component Analysis (PCA) FTIR spectra obtained each showed, respectively, over than 88.9%, 94.3%, 97.4%, 98.6 variances were described by first principal component. This latter value found 97.6% PCA applied all spectra. Using PCA/FTIR approach recently developed, EIST assessed investigated samples. Subsequently, an individual set temperature, which used establish model. final computed relative deviation 5.3% compared those experimental way. Moreover, two similar DBRPs aged different have been validate model, associated mean absolute percentage error (MAPE) 4.6%. comprehensive statistical analysis highlighted excellent goodness-of-fit metrics decrease increase natural temperature.

Язык: Английский

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Elaboration, Characterization and Thermal Decomposition Kinetics of New Nanoenergetic Composite Based on Hydrazine 3-Nitro-1,2,4-triazol-5-one and Nanostructured Cellulose Nitrate

Molecules, Год журнала: 2022, Номер 27(20), С. 6945 - 6945

Опубликована: Окт. 17, 2022

This research aims to develop new high-energy dense ordinary- and nano-energetic composites based on hydrazine 3-nitro-1,2,4-triazol-5-one (HNTO) nitrated cellulose nanostructured nitrocellulose (NC NMCC). The elaborated energetic formulations (HNTO/NC HNTO/NMCC) were fully characterized in terms of their chemical compatibility, morphology, thermal stability, performance. experimental findings implied that the designed HNTO/NC HNTO/NMCC have good compatibilities with attractive characteristics such as density greater than 1.780 g/cm3 impact sensitivity around 6 J. Furthermore, theoretical performance calculations (EXPLO5 V6.04) displayed optimal composition as-prepared yielded excellent specific impulses detonation velocities, which increased from 205.7 s 7908 m/s for 209.6 8064 HNTO/NMCC. Moreover, deep insight multi-step kinetic behaviors was provided measured DSC data combined isoconversional methods. It is revealed both undergo three consecutive exothermic events satisfactory activation energies range 139-166 kJ/mol 119-134 Overall, this developed nanoenergetic composite nanostructure could serve a promising candidate practical applications solid rocket propellants explosives.

Язык: Английский

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Direct carboxylation of cellulose in deep eutectic solvent and its adsorption behavior of methylene blue

Carbohydrate Polymer Technologies and Applications, Год журнала: 2022, Номер 4, С. 100222 - 100222

Опубликована: Май 31, 2022

Язык: Английский

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Elucidating the effect of nitrocellulose-encapsulated MgAl–CuO on the thermal behavior of double base propellant based on nitrocellulose and diethylene glycol dinitrate

Reaction Kinetics Mechanisms and Catalysis, Год журнала: 2023, Номер 136(4), С. 2309 - 2325

Опубликована: Июль 19, 2023

Язык: Английский

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