CHINESE JOURNAL OF ENERGETIC MATERIALS
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低分子凝胶剂和铝粉颗粒对JP-10凝胶燃料流变特性的影响
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浙江大学

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国家自然科学基金(U2341283)


The influence of low-molecular-weight gelators and aluminum powder powders on the rheological properties of JP-10 gel fuel
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Zhejiang University

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    摘要:

    为了研究铝粉粒径和凝胶剂浓度对JP-10含能凝胶燃料流变性能的影响规律,采用双丙酮-D-甘露糖醇作为低分子凝胶剂,通过改变凝胶剂浓度、铝粉粒径及添加量,制备了系列JP-10基含能凝胶燃料。采用旋转流变仪系统测试了样品的稳态剪切特性、触变回复性能和动态振荡特性等,重点分析了不同参数对体系流变行为的作用机制。结果表明,凝胶具有显著的剪切变稀特性,当剪切速率从0.01 s-1增至100 s-1时,表观粘度下降约4个数量级。提高凝胶剂浓度可同步增强凝胶的剪切粘度、触变回复率及屈服应力,同时使模量的频率依赖性增强。添加铝粉会明显增加凝胶粘度和松弛时间,且纳米铝粉的影响较微米铝粉更明显。此外,表面活性剂和温度对凝胶流变性能也有一定的影响。随着表面活性剂浓度和温度的升高,凝胶体系的粘度、储能模量及耗能模量均呈现下降趋势。

    Abstract:

    The gelation of JP-10 is achieved by incorporating varying concentration of low-molecular-weight gelling agent. The rheological properties of the resulting gels are systematically investigated by introducing Al powder with different particle sizes. Key rheological parameters, including shear-dependent viscosity, thixotropic behavior, and linear viscoelastic properties, are analyzed to evaluate the effects of gelling agent concentration, Al powder content, and particle size. The results demonstrate a pronounced shear-thinning behavior, with the gel viscosity decreasing by approximately four orders of magnitude as the shear rate increased from 0.01 s?1 to 100 s?1. Increasing the gelling agent concentration led to enhanced viscosity, improved recovery ability, and higher yield stress, with a more pronounced frequency dependence observed at higher concentrations. The incorporation of Al powder significantly increases both gel viscosity and relaxation time, with nano-sized Al particles exerting a more substantial effect than micron-sized particles. Furthermore, the addition of surfactants and elevated temperatures results in a marked reduction in gel viscosity, accompanied by a concurrent decrease in both the storage modulus (G′)and loss modulus (G"). The incorporation of aluminum powder reduces the dependence of recovery rate on gelling agent concentration. Also, both surfactants and temperature significantly influence the rheological properties of the gel.The viscosity, storage modulus, and loss modulus of the gel system decrease with increasing surfactant concentration and temperature.

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徐一清. 低分子凝胶剂和铝粉颗粒对JP-10凝胶燃料流变特性的影响[J]. 含能材料,DOI:10.11943/CJEM2025091.

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  • 收稿日期: 2025-05-07
  • 最后修改日期: 2025-08-01
  • 录用日期: 2025-08-23
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