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

Tarchoun, Ahmed Fouzi; Trache, Djalal; Klapotke, Thomas M.; Slimani, Kheireddine; Belouettar, Baha-eddine; Abdelaziz, Amir; Bekhouche, Slimane and Bessa, Wissam (2022): Valorization of Esparto Grass Cellulosic Derivatives for the Development of Promising Energetic Azidodeoxy Biopolymers: Synthesis, Characterization and Isoconversional Thermal Kinetic Analysis. In: Propellants Explosives Pyrotechnics, Vol. 47, No. 3, e202100293

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 degrees C. Their kinetic triplet was also determined under non-isothermal DSC conditions employing isonversional integral approaches. Interestingly, the apparent 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.

• Item Type: Journal article
• Faculties: Chemistry and Pharmacy > Department of Chemistry
• Subjects: 500 Science > 540 Chemistry
• ISSN: 0721-3115
• Language: English