Dispersion of Nano-Al in the High-density Hydrocarbon Fuels HF-X Suspension

被引：0
|
作者：
Xu H.-X. [1 ,2 ]
Gong J.-L. [2 ]
Huang Y.-G. [3 ]
Li Y.-H. [2 ]
Zhou W.-J. [2 ]
Zhao F.-Q. [1 ]
Pang W.-Q. [2 ]
Xu S.-Y. [1 ]
Du Y.-M. [2 ]
机构：
[1] Science and Technology on Combustion and Explosion Laboratory, Xi'an
[2] Xi'an Modern Chemistry Research Institute, Xi'an
[3] Sichuan Aerospace South Sichuan Pyrotechnical Technology Co., Ltd., Luzhou, 646000, Sichuan
来源：
Huozhayao Xuebao/Chinese Journal of Explosives and Propellants | 2019年 / 42卷 / 04期
关键词：
Contact angle; Dispersion; High-density hydrocarbon fuels; Nano-aluminum; Physical chemistry; Sedimentation rate;
D O I：
10.14077/j.issn.1007-7812.2019.04.006
中图分类号：
学科分类号：
摘要：
In order to improve the dispersion stability of nano-aluminum in high-density hydrocarbon fuels(HF-X) suspension, the effect of the dispersant mass fraction, dispersion temperature, mass fraction and granularity of nano-Al, ultrasonic dispersion power and time of nano-Al in HF-X suspension on the dispersibility of nano-Al were investigated by sedimentation rate test. The morphology of nano-aluminum powder before and after dispersion was compared by SEM, the contact angle of nano-Al in the dispersant/HF-X solution was tested and the influence mechanism of dispersant was analyzed. The results show that the dispersion time of suspension of polymer dispersant containing amine anchoring group (HS) is longer than that of dispersant containing block copolymer (HT). The sedimentation rate of nano-aluminum in the HF-X suspension increases with the increase in the mass fraction and particle size of nano-aluminum powder, among them, the maximum mass fraction of nano-aluminum powder in HF-X suspension is up to 7.5%, and the mixture becomes paste when it is 10%. With increasing the dispersant HS50 mass concentration, the sedimentation rate of nano-aluminum powder decreases. When mass concentration of HS50 is 0.02g/mL, the sedimentation rate is 9.85×10-6g/(cm2•s), which tends to be constant. With increasing the ultrasonic dispersion power and time, the sedimentation rate of nano-aluminum powder decreases, which has a significant effect on the dispersion stability, while the dispersion temperature has little influence. The contact angle of nano-Al in HS/HF-X solution is much larger than that in HT/HF-X solution. The HS-series dispersants have better dispersion stability, which is related to the spatial retardation of polymer chain to nano-aluminum powder. © 2019, Editorial Board of Journal of Explosives & Propellants. All right reserved.
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页码：352 / 357
页数：5
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