Thermostable Energetic Coordination Polymers Based on Functionalized GO and Their Catalytic Effects on the Decomposition of AP and RDX

Abstract

In this study, new highly energetic coordination polymers (ECPs) were successfully prepared by a facile chemical modification method based on functionalized graphene oxide (GO) sheets. Simple cross-linked GO layers with triaminoguanidine ligand (T) may further be bonded with crystals containing T and transition metal ions (T–M) using cobalt, zinc, silver, or iron as coordination centers, generating 2D-layered energetic hybrid ECPs crystals. Successful functionalization of the prepared ECPs was confirmed by SEM, exhibiting very small crystals (<400 nm). The thermal decomposition of the different T–M complexes, with or without GO–T, was assessed by using simultaneous differential scanning calorimetry and thermogravimetric analysis. It has been revealed that the coordination reaction of GO–T with T–M leads to the production of highly thermostable ECPs. Furthermore, the incorporation of 10% of functionalized GO has improved the thermal stability of T–M crystals. Raman spectroscopy demonstrates that both D and G bands of these new ECPs have been shifted. The different chemical bonding is also confirmed by FTIR and XRD analyses. The catalytic effect of the designed GO–T–M–T energetic composites on the decomposition of ammonium perchlorate (AP) and 1,3,5-trinitro-1,3,5-triazinane (RDX) has been investigated. The results confirmed that those ECPs have strong catalytic effect on decomposition of AP, and it may even stabilize RDX crystals before its thermolysis.

Hydrothermal Synthesis of Hematite Nanoparticles Decorated on Carbon Mesospheres and Their Synergetic Action on the Thermal Decomposition of Nitrocellulose

“…The spectra of CMS and Fe 2 O 3 -CMS displayed two characteristic bands. The first at 1357 cm −1 , assigned to the D band, is related to structural defects, whereas the second at 1574 cm −1 corresponded to the G band, representing the graphitic structure in carbon materials [ 38 , 59 ]. It has been reported that the D/G ratio of band intensities represents the graphitic structure with respect to the structure disorder [ 60 , 61 ].…”

Optimized energetic HNTO/AN co-crystal and its thermal decomposition kinetics in the presence of energetic coordination nanomaterials based on functionalized graphene oxide and cobalt

“…Recently, our research group designed GO-doped transition metal (Co) complexes of T and assessed their catalytic effect toward ammonium perchlorate, RDX, and NTO. 35,36 However, to the best knowledge of the authors, such type of catalysts has never been applied as additive of energetic co-crystals. Besides that, the use of GO as catalytic support may play a synergistic effect with the other ingredients, which will enhance the stability as well the decomposition efficient of the developed energetic co-crystals.…”

“…This latter is also compared to the co-crystal of a molar ratio 1 : 1, developed in our recent work, 29 in terms of structure and thermal behavior in a detailed manner. Aer that, a deep investigation of the catalytic effect of the two high energetic 2D-catalysts, namely, T-Co and GO-T-Co-T, developed in our previous study, 35 on the thermolysis of HNTO/AN by means of nonisothermal differential scanning calorimetry (DSC). The kinetic parameters, including the energy of activation, preexponential factor and the reaction models of the co-crystal supplemented with catalysts have been calculated by means of four isoconversional integral methods, viz., Trache-Abdelaziz-Siwani (TAS), iterative Kissinger-Akahira-Sunose (it-KAS), iterative Flynn-Wall-Ozawa (it-FWO) and Sbirrazzuoli methodology.…”

Cellulose Nanocrystals/Graphene Hybrids—A Promising New Class of Materials for Advanced Applications

“…Graphene-based nanomaterials possess exceptional electrical, optical, mechanical, electrochemical and thermal features that make them versatile for a wide range of applications and have drawn worldwide attention in both academic and engineering fields [ 44 , 105 ]. They can be employed in industrial applications such as biomedical, solar cells, biosensors, supercapacitors, electromagnetic absorbers, optical devices, integrated circuit, protective coatings, organic light-emitting diodes, sound transducers, petroleum industry, automobile components, aerospace, energy storage, nanocomposites and contamination purification in wastewater management, to cite a few ( Figure 3 f) [ 107 , 115 , 116 ].…”