Biomass materials self-assembled core-shell CL-20@Biomass materials-TiO2 energetic composites with reduced impact sensitivity and enhanced thermal stability

Recently, nano-titanium dioxide (TiO2) had attracted much attention because it was a potential desensitizing material. However, it was still a great challenge to coat nano-TiO2 on the surface of energetic materials. To enhance the interface interaction between TiO2 nanoparticles and hexanitrohexaazaisowurtzitane (CL-20), the surface of titanium dioxide was modified using green and biocompatible tea polyphenols (TP) and dopamine (DA). In this research, the core-shell CL-20@TP-TiO2 and CL-20@DA-TiO2 energetic composites were successfully prepared by In-situ polymerization. The prepared CL-20@TP-TiO2 and CL-20@DA-TiO2 were analyzed by a series of characterization techniques. The safety test results indicate that TP-TiO2 and DA-TiO2 can effectively form a protective layer on the surface of CL-20, which can reduce the friction, extrusion, and impact between energetic crystal particles, thereby reducing the sensitivity of the energetic materials and improving their thermal stability. Data will be made available on request.