Nitrated bacterial cellulose (NBC) has been used to displace nitrocellulose (NC) because of its superior physicochemical properties, such as mechanical strength and purity, compared with NC. To meet the high energy and high strength requirements of propellants, TEGDN/NBC composites were prepared following the designs of triethylene glycol dinitrate (TEGDN) propellant. The basic properties such as structure, morphology and thermal properties were characterized by nuclear magnetic resonance spectrometer (NMR), fourier transform infrared spectroscopy (FT‐IR), X‐ray diffraction (XRD), field emission scanning electron microscope (FESEM) and simultaneous thermal analysis (TG‐DSC). The rheological properties were measured and the effects of the solvents, solution concentrations and TEGDN Contents on rheological properties of TEGDN/NBC solutions were studied in detail. The results showed TEGDN/NBC composites had good flowability and low viscosity in DMF solvent. As solution concentrations increased, the viscosities of the TEGDN/NBC solutions greatly increased. As the TEGDN content increased, the viscosities, storage modulus and loss modulus firstly increased and then decreased, reached their maximum values when the TEGDN content was 15 wt %. The addition of TEGDN into NBC improved the thermal stability of NBC and the elasticity of the NBC solutions and was beneficial for its processing.
To meet the high energy and high strength requirements of advanced propellants, a novel propellant RDX/TEGDN/NBC was designed by hexogen that was also called RDX and triethylene glycol dinitrate/nitrated bacterial cellulose (TEGDN/ NBC) composite. The basic properties such as structure, morphology and thermal properties were characterized by fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), field emission scanning electron microscope (FESEM) and simultaneous thermal analysis (TG-DSC). The rheological properties were measured by rheometer and the effects of RDX content were studied by steady flow and dynamic test in detail. The results showed the added RDX of RDX/TEGDN/NBC composites solutions could destroy the stable structure of the system. Under the external force, RDX/ TEGDN/NBC composite solution exhibit a better fluidity compared with TEGDN/NBC composite solution. And with the RDX increase, the viscosities of the solution systems decreased first and then increased, reached their minmum values when the RDX content was 15 wt%.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.