铝颗粒对乙醇胺凝胶性能的影响

Effect of Aluminum Particles on the Gel Properties of Ethanolamine

采用乙醇胺、琼脂糖胶凝剂、含能颗粒铝制备系列燃料凝胶。利用量热仪、离心机、旋转流变仪等仪器考察了胶凝剂和铝颗粒添加量(质量分数)对凝胶热值、离心稳定性、流变性的影响;通过扫描电镜对铝、琼脂糖颗粒及凝胶微观形态进行了表征。结果表明:当铝颗粒质量分数为30%时,相较于纯凝胶,乙醇胺凝胶体积燃烧热提高了22.2%,离心析液率从26.5%下降到9.8%,稳定性大大增强;铝颗粒能够与凝胶相结合增强凝胶的网络结构、增加松弛时间和储能模量。

A series of fuel gels are prepared from agarose gel(ag),ethanolamine fuel(C2H7NO)and energetic aluminum particles.The effect of the mass fraction of gel agent and aluminum particles on the volume combustion heat,centrifugal stability and rheological properties of the resulting gel fuel is tested by calorimetry,centrifugation and rheology.The microstructures of the particles and gels are characterized by scanning electron microscopy.The results show that when the mass fraction of aluminum particles is 30%,the volume combustion heat of the gel can be increased by 22.2%with respect to that of pure gel;meanwhile,the centrifugal precipitation rate decreases from 26.5%to 9.8%,and the stability of the gel is significantly enhanced.The results of electron microscopy and rheology show that the association of aluminum particles with the gel enhances the network structure,and increases the relaxation time and storage modulus.