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为了改善双基推进剂的综合性能,拟将碳纳米管(CNTs)引入到双基药体系中,而其分散的均匀性可能影响添加效果,因此针对CNTs的分散方法进行了研究。首先将提纯处理后的CNTs经过高剪切力机械分散和超声波分散方法在溶剂中预分散,然后按0.25%～4%的添加量采用微胶囊分散工艺和溶剂法捏合工艺将CNTs分散到双基推进剂基体中,最后采用压延工艺将药团或药粒进行成型加工,分别用光学显微镜和扫描电镜研究了CNTs在双基推进剂基体中的分散状态。结果表明,采用高剪切力机械分散和超声波分散均有利于CNTs在溶剂中的预分散;采用微胶囊工艺可将CNTs团块在双基推进剂中分散到1μm以下,分散效果明显优于捏合工艺;经过压延成型CNTs达到完全分散的效果。
In order to improve the comprehensive performance of the double-base propellants, it is proposed that carbon nanotubes (CNTs) be introduced into the dual-drug system, and the uniformity of dispersion may affect the adding effect. Therefore, the dispersion methods of CNTs are studied. Firstly, the purified CNTs were pre-dispersed in a solvent by high-shear mechanical dispersion and ultrasonic dispersion method, and then CNTs were dispersed into double-groups by the microcapsule dispersion process and solvent-based kneading process at 0.25% ~ 4% In the propellant matrix, the calendering process was used to shape the pellets or pellets. The dispersion of CNTs in the matrix was investigated by optical microscope and scanning electron microscope respectively. The results show that mechanical dispersion and ultrasonic dispersion are both beneficial to the pre-dispersion of CNTs in the solvent. The microcapsule technology can disperse the CNTs agglomerate into 1μm or less in the double-base propellant, and the dispersion effect is obviously better than that of the kneaded Process; CNTs after calendering to achieve complete dispersion effect.