火炸药学报2026，Vol.49Issue(5)：515-523,9.DOI:10.14077/j.issn.1007-7812.202601028
聚偏氟乙烯包覆与表面纯化协同增强硼粉的点火燃烧性能
Synergistic Enhancement of Ignition and Combustion Property of Boron Powder by Coating with Polyvinylidene Fluoride and Surface Purification
摘要
Abstract
To address the problem where the compact oxide layer on the surface of boron powder significantly inhibits its igni-tion and combustion processes,resulting in low energy release efficiency and prolonged ignition delay time,the boron powder was purified,and polyvinylidene fluoride(PVDF)was used as a fluorine-containing coating material to prepare Bw@PVDF core-shell composite particles with different coating ratios by the solvent-nonsolvent method.The structure of the samples was characterized by SEM,TEM/EDS and XPS,and their thermal behavior,ignition performance and combustion properties were systematically investigated using TG-DSC,laser ignition and calorimetry.The results showed that PVDF can stably coat on boron particles surface and formed a core-shell structure,and the optimal coating quality was obtained at a PVDF mass fraction of 6％.PVDF coating decreased the initial oxidation temperature of boron by 10℃ and significantly enhanced heat release inten-sity,while the ignition delay time of Bw@6％PVDF was reduced by 39％compared with raw boron,and the combustion effi-ciency increased from 25.20％to 32.35％.Fluorine species generated from PVDF were found to react with lattice impurities on boron surface,producing a"chemical breakage"effect,and surface purification removed oxidized boron that hindered pri-mary ignition and combustion;the synergistic effect of purification and PVDF coating effectively enhanced the ignition and com-bustion performance of boron powder.关键词
物理化学/硼粉/PVDF/溶剂-非溶剂法/核壳材料/点火燃烧/聚偏氟乙烯Key words
physical chemistry/boron powder/PVDF/solvent-nonsolvent method/core-shell structure/ignition and combus-tion/polyvinylidene fluoride分类
军事科技引用本文复制引用
刘洋,王䶮,柳恒,刘月舟,汪营磊..聚偏氟乙烯包覆与表面纯化协同增强硼粉的点火燃烧性能[J].火炸药学报,2026,49(5):515-523,9.基金项目
国家自然科学基金(No.22405208) （No.22405208）
