Valorization of Esparto Grass Cellulosic Derivatives for the Development of Promising Energetic Azidodeoxy Biopolymers: Synthesis, Characterization and Isoconversional Thermal Kinetic Analysis

Abstract

In the frame of developing new high-energy materials from bioresources, emergent cellulose and microcrystalline cellulose functionalized with explosophoric azides were successfully synthesized from a prominent alternative esparto grass fibres. The designed insensitive nitrogen-rich cellulosic biopolymers, namely, azidodeoxy esparto grass cellulose (AEGC) and azidodeoxy esparto grass microcrystalline cellulose (AEGMCC), displayed outstanding features, such as nitrogen content (w/w) of 18.24-18.68 %, the density of 1.601-1.626 g/cm 3 , and thermal decomposition of 203-218 °C. Their kinetic triplet was also determined under non-isothermal DSC conditions employing isonversional integral approaches. Interestingly, the appa-rent activation energy and the decimal logarithm of a preexponential factor of the developed AEGC and AEGMCC were found to be better than those of the common nitrocellulose. In addition, the reaction model examination based on Trache-Abdelaziz-Siwani (TAS) approach revealed that the produced AEGC and AEGMCC were accurately presented by an autocatalytic Avrami-Erofeev decomposition process. These results established that esparto grass fibres could be considered as a valuable alternative feedstock for the synthesis of outstanding energetic cellulose-rich polymers for potential applications in solid propellant formulations.

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

“…This statement can also be justified through the values of the difference between the peak and the onset temperatures (∆ T ) for the different decomposition steps of the HNTO/NMCC composite, which significantly decreased compared to those of the HNTO/NC formulation ( Table 2 ). Another interesting aspect that one can depict is the shift of the exothermic processes of HNTO towards a higher temperature, stipulating that the heat transfer from the reaction zone to the unburned portions of HNTO is facilitated by nitrate esters, which sustains the propagation of the exothermic reaction [ 48 , 49 ]. Indeed, the early decomposition of nitrated cellulosic polymer (NC or NMCC) could be considered as the likely thermolysis trigger of the investigated energetic composites [ 47 , 50 ].…”

Towards Investigating the Effect of Ammonium Nitrate on the Characteristics and Thermal Decomposition Behavior of Energetic Double Base NC/DEGDN Composite

“…AN powder used in the present research was commercial grade purchased from Prolabo. Cellulose nitrate (NC) with a nitrogen content of 12.68% was prepared following the method detailed in our recent studies [17,18]. All other reactants and solvents were of analytical grade and were used without further purification.…”

Thermal Decomposition Mechanism of Molecular Perovskite Energetic Material (C6NH14)(NH4)(ClO4)3(DAP‐4)

“…The calculation of thermal decomposition kinetic parameters is of great significance for studying the thermal decomposition characteristics of materials [27][28][29][30]. The thermal decomposition characteristics of DAP-4 at different heating rates of 5 K/min, 10 K/min, 15 K/min, and 20 K/min were studied in DSC to understand the thermal decomposition process and kinetic parameters of DAP-4.…”