含能材料2025，Vol.33Issue(6)：589-600,12.DOI:10.11943/CJEM2025008
PVDF含量对铝基固体推进剂燃烧性能的影响规律
Influence of PVDF Content on the Combustion Performances of Aluminum-based Solid Propellants
摘要
Abstract
To elucidate the effect of polyvinylidene fluoride(PVDF)content on the combustion performances of aluminum-based solid propellants,Al@PVDF composite powders with coating contents ranging from 2%to 14%were prepared via the solvent and non-solvent method.The thermal reactivity of Al@PVDF composite powders and the energy release and combustion perfor-mances of the corresponding solid propellants were analyzed using thermogravimetric-differential scanning calorimetry,constant volume combustion tests,and simultaneous ignition experiments.Results indicate that the PVDF coating significantly enhances the thermal reactivity of aluminum.At the 6%PVDF coating content,the aluminum powder achieves the maximum thermal weight gain and exothermic enthalpy value of 78.96%and 16.14 kJ·g-1,respectively.As the PVDF content increases,the energy release of solid propellants exhibits a trend of initial increase,following by a decrease,subsequent re-increase,and final de-cline,and reaching the maximum heat release of 6026 J·g-1 and pressurization of 4.45 MPa at 10%coating content.The ignition delay time of aluminum-oxygen reaction decreases from 53 ms to 12 ms.The pressure exponent of burning rate underwent a three-stage evolution,declining from 0.43 to 0.36,and further to 0.26.Analysis of condensed combustion products(CCPs)re-veals a stage-dependent mechanism of PVDF content on combustion performances:the low coating content(2%-4%)inhibits molten aluminum agglomeration via pyrolysis products;the medium content(6%-8%)accelerates particle fragmentation and ig-nition but induces secondary agglomeration;the high content(10%-14%)generates excessive pyrolysis products that promote secondary fragmentation of agglomerates in gas-phase region.关键词
铝基固体推进剂/铝粉/PVDF含量/包覆/燃烧性能/团聚/作用机理Key words
aluminum based solid propellants/aluminum fuel/PVDF content/coating/combustion performances/agglomeration/pro-motion mechanism分类
军事科技引用本文复制引用
陈文聪,邓皓源,石情文,张子怡,孙一,罗国强,沈强..PVDF含量对铝基固体推进剂燃烧性能的影响规律[J].含能材料,2025,33(6):589-600,12.基金项目
国家自然科学基金(52104363) （52104363）
教育部联合基金(8091B03052305) （8091B03052305）
广东省重点研发计划(2020B010181001) National Natural Science Foundation of China(No.52104363),Joint Foundation of the Ministry of Education(8091B03052305)and Key-Area Research and Development Program of Guangdong Province(No.2020B010181001) （2020B010181001）
