PET基高能固体推进剂3D打印配方设计与制备  

Formulation Design and Preparation of 3D Printed PET Based High⁃energy Solid Propellant

作　　者：石柯 史钰 孙鑫科 吴忆雯 任全彬[3] 李伟 SHI Ke;SHI Yu;SUN Xin-ke;WU Yi-wen;REN Quan-bin;LI Wei(Science and Technology on Aerospace Chemical Power Laboratory,Xiangyang 441003,China;Hubei Institute of Aerospace Chemotechnology,Xiangyang 441003,China;Academy of Aerospace Solid Propulsion Technology,Xi'an 710025,China)

机构地区：[1]航天化学动力技术重点实验室,湖北襄阳441003 [2]湖北航天化学技术研究所,湖北襄阳441003 [3]航天动力技术研究院,陕西西安710025

出　　处：《含能材料》2023年第9期880-886,共7页Chinese Journal of Energetic Materials

基　　金：国家自然科学基金资助(NSFC 22275051,22105067,22205060)。

摘　　要：以四氢呋喃共聚醚(PET)基高能固体推进剂为研究对象,设计了以定型助剂改性的PET/硝酸酯(NG/BTTN)为黏合剂体系,高氯酸铵(AP)为固体填料,多官能团脂肪族异氰酸酯(N‑100)为固化剂的3D打印推进剂配方。对定型助剂MS在25℃条件下的定型效果、与各组分的相容性以及25,35,45,55℃温度下的流变特性开展了研究,通过仿真模拟确定了温度、喷头直径、压力等3D打印工艺参数的合理范围。结果表明MS与推进剂中与PET/NG/BTTN、AP的相容性较好,并在一定程度上提升了推进剂的安全性能,药浆具有温敏特性,可在25℃达到良好的定型效果,在温度50℃、喷头直径1.2 mm、压力11 kPa的打印参数下,实际打印速率为8 mm·s^(-1),首次实现了PET基高能固体推进剂3D打印成型。Taking tetrahydrofuran copolyether(PET)‑based high energy solid propellant as the research focus,the 3D printed propellant was designed and formulated with PET/nitrate(NG/BTTN)as the binder system modified by shaping agent(MS),ammonium perchlorate(AP)as the solid filler and polyfunctional aliphatic isocyanate(N‑100)as the curing agent.The shaping effect of MS at 25℃,its compatibility with each component,and its rheological properties at 25,35,45,55℃were studied.The reasonable range of the processing parameters for 3D printing such as temperature,nozzle diameter and pressure were determined preliminarily by simulation.The results show that MS has good compatibility with PET/NG/BTTN and AP in the propellant,and it also improves the safety performance of the propellant to a certain extent.The obtained slurry exhibits the temperature‑sensitive characteristics,capable of achieving good setting effect at 25℃.By applying the determined printing parameters involving the temperature of 50℃,the nozzle diameter of 1.2 mm and the pressure of 11 kPa,the actual printing rate can be approached to 8 mm·s^(-1),which is the first time that the 3D printing of PET based high‑energy solid propellant to be realized.

关 键 词：PET高能固体推进剂 3D打印 仿真模拟 流变特性 相容性 

分 类 号：TJ55[兵器科学与技术—军事化学与烟火技术]