State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 313003, China.
J Nanosci Nanotechnol. 2019 Apr 1;19(4):2108-2115. doi: 10.1166/jnn.2019.15803.
A stability analyser and a rheometer were used to study the effects of Tween 85 (polyoxyethylene sorbitan trioleate) on the dispersion properties of nano-aluminium/JP-10 (exo-tetrahydrodicyclopentadiene) suspensions. Results show that the addition of Tween 85 can effectively improve the stability of two-phase suspensions by hindering particle aggregation and reduce the viscosity of a system. The surface characteristics of the zeta potential and the contact angle were measured. The dispersion of the suspensions was improved by Tween 85 mainly by enhancing the steric hindrance of particles. The adsorbed particles obtained in JP-10 with different Tween 85 concentrations were analysed via scanning electron microscopy and Fourier transform infrared spectroscopy to explore the adsorption behaviour of Tween 85 molecules on the surface of aluminium particles and to confirm that Tween 85 formed an adsorption layer on the particle surface. Thermogravimetric analysis indicated that the adsorption amount of Tween 85 increased with its concentration in JP-10. The roughness analysis of the surface of adsorbed particles was measured via atomic force microscopy to characterise the thickness of the adsorption layer. The results showed that Tween 85 molecules formed an irregular adsorption layer on the particle surface, and an increase in the concentration of Tween 85 in JP-10 increased the thickness of the adsorption layer.
采用稳定性分析仪和流变仪研究了吐温 85（聚氧乙烯山梨糖醇三油酸酯）对纳米铝/ JP-10（桥环戊二烯）悬浮液分散性能的影响。结果表明，添加吐温 85 可以通过阻碍颗粒聚集有效地提高两相悬浮液的稳定性，并降低体系的黏度。测量了zeta 电位和接触角的表面特性。通过增强颗粒的空间位阻，吐温 85 主要改善了悬浮液的分散性。通过扫描电子显微镜和傅里叶变换红外光谱分析了在不同吐温 85 浓度的 JP-10 中获得的吸附颗粒，以探究吐温 85 分子在铝颗粒表面的吸附行为，并证实吐温 85 在颗粒表面形成了吸附层。热重分析表明，吸附量随 JP-10 中吐温 85 浓度的增加而增加。通过原子力显微镜对吸附颗粒的表面粗糙度进行了测量，以表征吸附层的厚度。结果表明，吐温 85 分子在颗粒表面形成了不规则的吸附层，JP-10 中吐温 85 浓度的增加会增加吸附层的厚度。
