含能材料2024，Vol.32Issue(11)：1145-1153,9.DOI:10.11943/CJEM2024113
微波辅助Al@PVDF-OH复合燃料的制备及其燃烧性能
Preparation and Combustion Performance of Microwave Assisted Al@PVDF-OH Composite Fuel
摘要
Abstract
Fluoropolymers such as polyvinylidene fluoride(PVDF)can effectively inhibit the agglomeration of aluminum powder and enhance its reactivity.However,the affinity between fluorinated polymers and the surface of Al particles covered by alumi-na is poor,and the inhibitory effect of fluorinated polymers directly coating the Al surface on Al aggregation is not ideal.In this study,a microwave-enhanced reaction method was used to obtain hydroxylated modified PVDF-OH.PVDF-OH was coated on the surface of aluminum powder by solvent/non-solvent method for preparation Al@PVDF-OH.Subsequently,the prepared Al@PVDF-OH composite fuel is used to prepare composite solid propellants.The molecular structure and elemental composition of PVDF-OH were studied using infrared spectroscopy and X-ray diffraction.Using equipment such as scanning electron micro-scope,differential scanning calorimeter,high-speed camera,and oxygen bomb calorimeter study the microstructure composi-tion and combustion performance of Al@PVDF-OH composite fuels.The results showed that the PVDF-OH prepared by microwave-assisted preparation had a higher hydroxyl content,and the optimal treatment condition was 1 minute at a micro-wave power of 240 W.The combustion performance of Al@PVDF-OH composite fuel was superior to that of Al@PVDF compos-ite fuel coated with unmodified PVDF and Al@PVDF-OH(H)composite fuel coated with heat-modified PVDF-OH(H).The opti-mal PVDF-OH content was found to be 15%.Compared to pure aluminum,the combustion heat value of Al@PVDF-OH com-posite fuel with 15%PVDF-OH increased from 19140 kJ·kg-1 to 24912 kJ·kg-1.Combustion tests mixed with ammonium per-chlorate(AP)showed that the ignition delay time of Al@PVDF-OH composite fuel shortened from 77 ms to 70 ms,and the burn-ing rate increased from 195.7 mm·s-1 to 225.7 mm·s-1 compared to pure aluminum.Compared to aluminum-based solid propel-lants,solid propellants based on Al@PVDF-OH composite fuel exhibited an increase in combustion heat value from 13281 kJ·kg-1 to 14020 kJ·kg-1,an increase in burning rate from 1.281 mm·s-1 to 1.915 mm·s-1,and a reduction in the particle size D90 of condensed phase combustion products from 74.324 μm to 52.749 μm.关键词
聚偏氟乙烯(PVDF)/铝粉/微波辅助/固体推进剂/燃烧性能/复合燃料Key words
polyvinylidene fluoride(PVDF)/aluminum powder/microwave assisted/solid propellant/combustion performance/composite fuel分类
军事科技引用本文复制引用
朱开天,朱权,何伟,郭彦丽..微波辅助Al@PVDF-OH复合燃料的制备及其燃烧性能[J].含能材料,2024,32(11):1145-1153,9.基金项目
固体推进全国重点实验室开放基金 Opening fund of State Key Laboratory of Solid Propulsion （）
