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Zhang-Yunhua,Beijing Institute of Technology | Liu-Chuanting,Beijing Institute of Technology | Lv-Yanyan,Beijing Institute of Technology | Zhou-Zhenwen,Beijing Institute of Technology | And 4 more authors.
Integrated Ferroelectrics | Year: 2016

Cellulose nanofibers (CNFs) with high aspect ratio was prepared from wood cellulose using 2,2,6,6-tetramethylpiperidine oxygen radical (TEMPO) oxidation method. By UV, TEM, FT-IR, XRD and TG, the characterizations of CNFs were studied. The results showed that CNFs was a a hydrophilic natural nanomaterials with good suspension stability, high aspect ratio and cellulose I crystal structure. The modified double base propellant with high solid content prepared by calendering process was modified by using CNFs as nano-fillers. The results of tensile test and burning test of propellant showed that the mechanical properties and combustion performances of CNFs modified double base propellant had been improved significantly compared to conventional modified double base propellant. The tensile strength and elongation at break can be increased by nearly 34%, 45%,respectively. The burning rate of propellant can be increased by 27.5% while the pressure coefficient decreased by 20%. © 2016, © Taylor & Francis Group, LLC. Source


Liu S.-E.,Nanjing University of Science and Technology | Liu S.-E.,Shanxi Xingan Chemical Industry Co. | Zhao X.-M.,Shanxi Xingan Chemical Industry Co. | Zhao M.-L.,Shanxi Xingan Chemical Industry Co. | And 3 more authors.
Hanneng Cailiao/Chinese Journal of Energetic Materials | Year: 2013

Seven modified nitramine double base propellants with different content of RDX were prepared by screw extrusion process, and their mechanical safety performance, including the friction sensitivity, the impact sensitivity and the shooting sensitivity were studied according to the national military standard methods. Results show that with increasing of RDX, the impact sensitivity, the friction sensitivity and combustion probabilities of shooting of the propellants increase. The friction sensitivity keeps stable at around 60% explosion probability and impact sensitivities increase slowly when RDX content is up to 27%. The combustion probabilities of shooting of the propellant increase with RDX content increasing. Source


Liu S.-E.,Nanjing University of Science and Technology | Liu S.-E.,Shanxi Xingan Chemical Industry Co. | Zheng Q.-L.,Nanjing University of Science and Technology | Zou W.-W.,Nanjing University of Science and Technology | And 4 more authors.
Dandao Xuebao/Journal of Ballistics | Year: 2015

To study the effect of DNTF on performance of screw extruded nitramine modified double-base (RDX/Al/CMDB) propellant, the RDX in screw extruded nitramine CMDB propellant was gradually replaced by DNTF and proved by experiments, and the processing properties, mechanical properties, combustion properties, mechanical sensitivity and energy properties of modified double-base propellant were characterized. Results show that the application of DNTF has no influences on processing properties and chemical stability of propellants. The DNTF not only increases propellant energy of propellants but also is beneficial for mechanical property and decreasing mechanical sensitivity. The DNTF can improve the burning rate of propellant properly, and the influence on burning rate pressure exponent is not obvious while the content of DNTF is no more than 10%. ©, 2015, Nanjing University of Science and Technology. All right reserved. Source


Liu S.-E.,Shanxi Xingan Chemical Industry Co. | Liu S.-E.,Nanjing University of Science and Technology | Zhou W.-L.,Nanjing University of Science and Technology | Pan B.,Shanxi Xingan Chemical Industry Co. | And 2 more authors.
Hanneng Cailiao/Chinese Journal of Energetic Materials | Year: 2013

In order to improve the comprehensive performance of nitramine double-base propellant, carried out application of pentaerythrite diazidodinitrate (PDADN) in screw extruded nitramine modified double-base propellant was studied. The mechanical property, burning characteristics, chemical stability, mechanical sensitivity, energy characteristics and gas characteristic signal of propellants were measured. Results show that use of the new-type energetic material not only improves mechanical property of propellants, but also is beneficial for increasing propellant energy and decreasing characteristic signal of burning gas and burning temperature. Source

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