A new fluorocarbon adhesive:Inhibiting agglomeration during combustion of propellant via efficient F-Al_(2)O_(3) preignition reaction  

作　　者：Qifa Yao Min Xia Chao Wang Fanzhi Yang Wei Yang Yunjun Luo 

机构地区：[1]School of Materials Science and Engineering,Beijing Institute of Technology,Beijing,China [2]Key Laboratory of High Energy Density Materials,Ministry of Education,Beijing Institute of Technology,Beijing,China [3]School of Aerospace Engineering,Beijing Institute of Technology,Beijing,China [4]Advanced Research Institute of Multidisciplinary Science,Beijing Institute of Technology,Beijing,China

出　　处：《Carbon Energy》2024年第6期292-305,共14页碳能源（英文）

基　　金：Fundamental Research Funds for the Central Universities,Grant/Award Number:3052017010。

摘　　要：Inhibiting the agglomeration of molten aluminum particles packed in the binder network is a promising scheme to achieve efficient combustion of solid propellants.In this investigation,the hydroxyl-terminated structured fluorinated alcohol compound(PFD)was introduced to modify the traditional polyethylene glycol/polytetrahydrofuran block copolymerization(HTPE)binder;that is,a unique fluorinated polyether(FTPE)binder was synthesized by embedding fluorinated organic segments into the HTPE binder via crosslinking curing.The FTPE was applied in aluminum-based propellants for the first time.Due to the complete release of fluorinated organic active segments in the range of 300℃to 400℃,the burning rate of FTPEbased propellant increased from 4.07(0%PFD)to 6.36 mm/s(5%PFD),increased by 56.27%under 1 MPa.The reaction heat of FTPE propellants increased from 5.95(0%PFD)to 7.18 MJ/kg(5%PFD)under 3.0 MPa,indicating that HTPE binder modified with PFD would be conducive to inhibiting the D90 of condensed combustion products(CCPs)dropped by 81.84%from 75.46(0%PFD)to 13.71μm(5%PFD)under 3.0 MPa,in consistent with the significant reduction of aluminum agglomerates observed on the quenched burning surface of the propellants.Those results demonstrated that a novel FTPE binder with PFD can release fluorinated organic active segments,which motivate preignition reaction with the alumina shell in the early stage of aluminum combustion,and then enhance the melting diffusion effect of aluminum to inhibit the agglomeration.

关 键 词：agglomeration characteristics aluminum particles COMBUSTION fluorine alcohol compounds HTPE propellants 

分 类 号：TQ584.31[化学工程—精细化工] V51[航空宇航科学与技术—航空宇航推进理论与工程]