Abstract In the controllable combustion field, hydroxyl ammonium nitrate (HAN)-based electrically controlled solid propellants (ECSPs) is of growing interest in green fuels with safety, throttle- ability and at-will on-off capability. However, the current research is confined to the ignition characteristics and ablation process of basic ECSP formulations (75 wt% HAN ionic liquid oxidizer, 5 wt% ammonium nitrate co-oxidizer and 20 wt% polyvinyl alcohol binder), rather than working in functional additives. Herein, multiwall carbon nanotubes (MWCNT) and nano/micro aluminum powders were introduced in ECSPs, facilitating electrical conductivity and energy release. It indicates that the homogeneous dispersed MWCNT in polyvinyl alcohol (PVA) microspheres, preparing by the micro-segmented flow method, results in a 9.8% increase in electrical conductivity of the ECSPs. At 0.5 MPa, ECSPs containing 1%, 3% and 5% 5 µm aluminum powder reinforce the burning rate by 38.0%, 186.3%, 214.7% and mass ablation by 10.7%, 95.2%, 175.6% at 200 V, yet the large heat release by excess aluminum powder shifts the non-self-sustaining combustion of ECSPs to self-sustaining combustion at high pressure (above 0.8 MPa). The mechanism of promoting ECSPs combustion by liberating aluminum-nitric acid (released by HAN ionization) reaction were proposed.

中文翻译：

---

MWCNT/Al对羟基硝酸铵（HAN）基电控固体推进剂燃烧行为的影响

摘要 在可控燃烧领域，基于羟基硝酸铵（HAN）的电控固体推进剂（ECSPs）作为具有安全性、节流性和随意开关能力的绿色燃料越来越受到关注。然而，目前的研究仅限于基本 ECSP 配方（75 wt% HAN 离子液体氧化剂、5 wt% 硝酸铵助氧化剂和 20 wt% 聚乙烯醇粘合剂）的点火特性和烧蚀过程，而不是在功能添加剂方面工作. 在此，多壁碳纳米管（MWCNT）和纳米/微铝粉被引入到 ECSP 中，促进了导电性和能量释放。这表明通过微分段流动法制备的聚乙烯醇 (PVA) 微球中均匀分散的 MWCNT 得到 9. ECSP 的电导率增加 8%。在 0.5 MPa 时，含有 1%、3% 和 5% 5 µm 铝粉的 ECSP 在 200 V 时将燃烧率提高了 38.0%、186.3%、214.7%，质量烧蚀提高了 10.7%、95.2%、175.6%。过量铝粉释放的热量将 ECSP 的非自持燃烧转变为高压（0.8 MPa 以上）下的自持燃烧。提出了通过释放铝-硝酸（由HAN电离释放）反应促进ECSPs燃烧的机制。然而，过量铝粉释放的大量热量将 ECSP 的非自持燃烧转变为高压（0.8 MPa 以上）下的自持燃烧。提出了通过释放铝-硝酸（由HAN电离释放）反应促进ECSPs燃烧的机制。然而，过量铝粉释放的大量热量将 ECSP 的非自持燃烧转变为高压（0.8 MPa 以上）下的自持燃烧。提出了通过释放铝-硝酸（由HAN电离释放）反应促进ECSPs燃烧的机制。