Preparation and Properties of Nitrocellulose/Viton Based Nano Energetic by Direct Writing

Direct writing technology is a promising approach for the preparation of reactive materials. The polymer binder provides a mechanically stable, processable and shapeable energetic structure for composites. Herein, Direct-writing energetic inks consisting of nitrocellulose (NC) and VitonF2311 as well as nanothermite were developed. Firstly, Fourier transform infrared spectroscopy (FT-IR) was used to analyze the intermolecular hydrogen bonds in the hybrid polymers, and the stability of the network structure was characterized by rheometer, and the mechanical properties of binders were also tested. The results show the best binder formulation is 20 wt% NC and 80 wt% F2311. The elongation at break of the binder is 600.94%, and the elastic modulus is 8.29 MPa. NC provides high tensile strength for the hybrid binder; F2311 provides high fracture tensile rate for the hybrid binder, and as a high-energy initiator, pre-ignition reaction occurs when the temperature reaches 350 °C. Then the as-prepared inks not only has excellent rheological properties so that it can be loaded with 90 wt% nanothermite, but also possess a homodisperse for components and good combustion performance. The average flame temperature is about 2400 K at atmospheric pressure.