CHINESE JOURNAL OF ENERGETIC MATERIALS
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Graphene-templated Energetic 5,5′-Bistetrazole Coordination Polymers and Their Catalytic Effects on Thermal Decomposition of RDX and AP
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1.Science and Technology on Combustion, Internal Flow and Thermo-structure Laboratory,Northwestern Polytechnical University, Xi′an 710072, China;2.Institute of Chemical Materials, CAEP, Mianyang 621999, China

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    Abstract:

    Several novel GO-based bis-tetrazole energetic coordination polymers (ECPs) were designed and prepared by solvothermal method, which contain cobalt(Ⅱ) and nickel(Ⅱ) as coordination center, 5,5′-bis-tetrazole(H2BT) and 5,5-bis-tetrazole-1,1-dioldehydrate (DHBT) as ligand. The coordination polymer crystal can be controlled through regulating the experimental conditions. Five typical promising catalysts of GO-Co-DBT、 GO-Co-BT、GO-Ni-DBT、α-GO-Ni-BT and β-GO-Ni-BT were characterized by XRD(X-ray diffraction), XPS(X-ray photoelectron spectroscopy), SEM(scanning electron microscope)/EDS(Energy Dispersive Spectrometer) and DSC(differential scanning calorimetry)-TG(Thermogravimetric Analysis) techniques. DSC-TG results of GO-Co-DBT、GO-Co-BT、GO-Ni-DBT、α-GO-Ni-BT indicate that GO-based bis-tetrazole energetic coordination polymers could reduce crystal defect, then lower the hot pot and improve thermostability, so the dicomposition temperatures of GO-Co-DBT, GO-Ni-DBT and GO-Ni-BT are all above 200 ℃. These ECPs as energetic catalysts have significant catalytic effect on thermal decomposition of AP and RDX. The reason can be that more O elements being transferred to react with NH4+ results in increasing the yields of NH3 and H2O, which also made two decomposition peaks of AP overlap and the whole heat release increase. The heat releases of AP and RDX catalyzed by graphene-templated bis-tetrazoles are 2757.0 J·g-1 and 2898.0 J·g-1 respectively, which improve more than 50% compared with pure AP and RDX. The endothermic peak of AP corresponding to the crystal transformation is also reduced to 23.2 kJ·mol-1. Prepared GO-based bis-tetrazole energetic coordination polymers could enhance thermostability and decomposition efficiency of AP and RDX.

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张雪雪,吕杰尧,何伟,等.石墨烯基联四唑含能配位聚合物的制备、表征及催化活性[J].含能材料,2019,27(9):749-758.
ZHANG Xue-xue, Lü Jie-yao, HE Wei, et al. Graphene-templated Energetic 5,5′-Bistetrazole Coordination Polymers and Their Catalytic Effects on Thermal Decomposition of RDX and AP[J]. Chinese Journal of Energetic Materials,2019,27(9):749-758.

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History
  • Received:May 08,2019
  • Revised:July 24,2019
  • Adopted:July 15,2019
  • Online: July 23,2019
  • Published: September 27,2019