Spatial control of silane layer formation on boron nanoparticles via diverse methods for high-energetic nanofuel applications

초록

This study presents a spatial control strategy of silane layer thickness using injection and dropwise methods to enhance the dispersion stability and combustion efficiency of energetic boron nanoparticles (BNs) in hydro-carbon fuels. Dropwise addition enables uniform silane coating through controlled hydrolysis and condensation,while rapid injection results in deposits of low-density siloxane on BNs. The dropwise silane-coated reduced BNs (DrBNOs) exhibit improved dispersion stability, low sedimentation, and enhanced compatibility with hydro-carbon fuels. Additionally, the long-chain silane coating effectively passivates nanoparticle surface, thereby increasing oxidation resistance and enabling faster ignition, complete combustion, and optimized energy release. Bomb calorimetry and droplet combustion analysis confirmed that DrBNOs deliver high calorific values with minimal residual soot. These findings highlight the importance of silane layer thickness in maximizing com-bustion performance, with the spatial control strategy offering a promising approach for developing advanced energetic nanoadditives for scramjet engine fuels.

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