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高能颗粒已用于固体推进剂中,但用于液体燃料则面临颗粒沉积等问题。通过表面改性可使纳米颗粒分散在液体碳氢燃料中。采用三正辛基氧膦对硼颗粒进行表面改性,考察了改性颗粒在燃料中的分散稳定性以及对燃料密度、能量和黏度的影响。结果表明,表面改性能够减少硼颗粒的团聚和沉降,使其较稳定地分散在高密度燃料(HD-03,密度为1.03 g/m L)中;燃料的密度和体积热值显著提高,保持液体状态并具有良好流动性。当添加质量分数为10%和60%颗粒时,燃料密度分别为1.12 g/m L和1.33 g/m L,体积能量分别为49.7 MJ/L和69.8 MJ/L,动力粘度为33 m Pa·s和87 m Pa·s。
High-energy particles have been used in solid propellants, but the use of liquid fuels is facing problems such as particle deposition. Nanoparticles can be dispersed in a liquid hydrocarbon fuel by surface modification. The surface modification of boron particles was carried out with trioctylphosphine oxide. The dispersion stability of the modified particles in the fuel and the influence on the density, energy and viscosity of the fuel were investigated. The results show that the surface modification can reduce the agglomeration and deposition of boron particles and disperse more stably in high-density fuel (HD-03, 1.03 g / m L); the density and volume calorific value of fuel increase significantly, Maintain liquid state and have good fluidity. The fuel densities were 1.12 g / m L and 1.33 g / m L, respectively, and the volume energies were 49.7 MJ / L and 69.8 MJ / L respectively, with a dynamic viscosity of 33 m Pa · s and 87 m Pa · s.