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作 者:刘静[1] 杨文博 吕英迪[2,3] 陶胜洋 LIU Jing;YANG Wenbo;LYU Yingdi;TAO Shengyang(School of Chemistry,State Key Laboratory of Fine Chemicals,Frontier Science Center for Smart Materials,Dalian Key Laboratory of Intelligent Chemistry,Dalian University of Technology,Dalian 116024,Liaoning,China;Xi’an Modern Chemistry Research Institute,Xi’an 710065,Shaanxi,China;School of Chemistry and Chemical Engineering,Northwestern Polytechnical University,Xian 710072,Shaanxi,China)
机构地区:[1]大连理工大学化学学院,精细化工国家重点实验室,智能材料化工前沿科学中心,大连市智能化学重点实验室,辽宁大连116024 [2]西安近代化学研究所,陕西西安710065 [3]西北工业大学化学与化工学院,陕西西安710072
出 处:《化工学报》2024年第4期1724-1734,共11页CIESC Journal
基 金:国家自然科学基金项目(22372025,22272017);中央高校基本科研业务费专项资金项目(DUT22LAB607,DUT22QN226);中国航空研究院1912项目。
摘 要:纳米铝粉作为高能添加剂广泛应用于含能复合材料领域。然而,制备高球形度铝粉掺杂的复合微球却面临着一系列挑战。采用喷雾与反溶剂结晶相结合的方法,探索了一种制备纳米铝粉与有机分子形成复合功能微球的喷射-结晶途径。通过自主设计的内混三流式空气雾化喷嘴,将前驱液雾化成液滴,反溶剂接收浴接收后,溶剂与反溶剂发生快速的相互扩散和传质过程,含能分子模拟物蔗糖八乙酸酯(SOA)在液滴内部析出,将铝粉包裹在内,洗涤干燥后得到铝粉掺杂的复合微球。通过调控合适的雾化、溶剂与反溶剂、添加剂等条件,成功解决了干燥后复合微球球形度低、微球之间相互团聚等现象,最终制备出粒径分布窄、形貌均一、分散性较好、球形度和密实度较高的掺杂铝粉的微球复合材料。Nano-aluminum powder is widely used in the field of energetic composite materials as a high-energy additive.However,the preparation of high sphericity aluminum powder doped composite microspheres is faced with a series of challenges.In this paper,a spray-crystallization method for the preparation of composite functional microspheres formed by nano-aluminum powder and organic molecules was explored by using the method of spray and anti-solvent crystallization.Through the self-designed internal mixing three-flow air atomization nozzle,the precursor liquid is atomized into liquid droplets.After receiving in the anti-solvent receiving bath,the solvent and anti-solvent rapidly mutual diffusion and mass transfer process occur.The energetic molecular simulation sucrose octaacetate(SOA)is precipitated in the droplet,the aluminum powder is wrapped in it,and the aluminum powder doped composite microspheres are obtained after washing and drying.In this paper,by adjusting suitable conditions such as atomization,solvent and anti-solvent,additives,etc.,the phenomenon of low sphericity and agglomeration of the composite microspheres after drying was successfully solved.Finally,the doped aluminum powder microsphere composite material with narrow particle size distribution,uniform morphology,good dispersion,sphericity and high compactness was prepared.
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