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添加羧酸盐调制表面活性剂在极性混合溶剂中的簇集行为,实现了推进剂模拟液的室温快速胶凝。采用3因素4水平正交实验系统考察了混合溶剂组成、胶凝剂组分(表面活性剂/羧酸盐)比例、凝胶形成温度等三种因素对推进剂模拟液凝胶力学强度、高剪切速率下粘度的影响。极差分析表明影响模拟液凝胶力学强度的因素主要是胶凝剂组成,其次是混合溶剂组成,影响最小的是凝胶形成的温度。而影响高剪切速率下凝胶体系粘度的因素依次为混合溶剂组成、凝胶形成温度和胶凝剂组成。结合频率扫描结果,筛选出了一种稳定性高、高剪切速率下粘度低的比较理想的推进剂模拟液凝胶体系:表面活性剂与羧酸盐的物质的量之比为2:1,二者的质量之和占体系质量的2.4%,溶剂水与乙二胺的体积比为1:3。该凝胶屈服应力为794.3 Pa,极限剪切速率下粘度13.7 mPa·s。
The clustering behavior of carboxylate-modulating surfactants in polar mixed solvents resulted in rapid gelling of propellant simulants at room temperature. The three factors and four levels of orthogonal experimental system were used to investigate the effects of the composition of the mixed solvent, the components of the gelling agent (surfactant / carboxylate ratio) and the temperature of the gel formation on the mechanical strength of propellant simulated liquid gel, Effect of viscosity at shear rate. The analysis of range shows that the main factors affecting the mechanical strength of the simulated liquid gel are the composition of the gelling agent, followed by the mixed solvent, and the temperature of the gel formation is the least affected. The factors affecting the viscosity of the gel system under high shear rate were the mixed solvent composition, the gel formation temperature and the gelling agent composition. In combination with the results of frequency scanning, an ideal propellant simulating liquid gel system with high stability and low viscosity at high shear rate was screened out: the ratio of surfactant to carboxylate was 2: 1 , The sum of the quality of the two accounted for 2.4% of the system mass, solvent water and ethylenediamine volume ratio of 1: 3. The gel has a yield stress of 794.3 Pa and a viscosity of 13.7 mPa · s at the ultimate shear rate.