RT Journal Article
ID 2db31c1504d74f9e
A1 Gao, Haixiang 
A1 Li, Songqing 
A1 Thottempudi, Venugopal 
A1 Maciejewski, John P. 
A1 Vo, Thao T. 
A1 He, Ling 
A1 Zhang, Qinghua 
A1 Shreeve, Jean'ne M.
T1 HYPERGOLIC IONIC LIQUID FUELS AND OXIDIZERS
JF International Journal of Energetic Materials and Chemical Propulsion
JO IJEMCP
YR 2014
FD 2014-08-07
VO 13
IS 3
SP 251
OP 285
K1 fuel
K1 oxidizer
K1 white fuming nitric acid
K1 hydrolytic stability
K1 liquid range
K1 dicyanoborate
K1 cyanoborate
K1 boranes
K1 ignition delay time
K1 N-chloro derivatives
 
AB Hypergols (fuel and oxidizer that ignite on contact) are useful for space propulsion since reaction can be initiated or terminated by opening or closing appropriate valves. Hypergolic liquid propellants are strongly preferred over solid fuels or oxidizers since they show excellent hypergolic ignition and low ignition delay time, high specific impulse, and better thrust control. Hydrazine, and its methylsubstituted derivatives, are fuels of choice based on favorable combustion characteristics, and high specific impulse. However, these positive properties are diminished by many drawbacks including the volatility of these fuels which, because of their carcinogenic and toxic nature, require costly handling procedures to meet environmental requirements during manufacture, storage, shipping, and application. Based on these unattractive properties, chemists worldwide have been catalyzed to develop alternative environmentally friendly hypergolic ionic liquid propellants as fuels. Anions of these salts, which include dicyanamide, dicyanoborate, cyanoborate, azide, nitrate, aluminum borohydride, nitrocyanamide, etc., appear to play the major role in determining hypergolic properties. Although cations play a lesser role, they are most frequently nitrogen-containing alkyl and aromatic species,
e.g., substituted alkyl ammonium, imidazolium, imidazolium-substituted with alkyl, vinyl, propargyl, etc. New stable, dense, storable oxidizers are needed in order to address dependably the demands for energetic systems that are on call 24/7 since the typical oxidizers are likely to be cryogens, unstable liquids, or corrosive substances. Stable room temperature oxidizers that possess positive chlorine or
bromine atoms, e.g., azo bis (bromochloro FOX), exhibit appropriate properties when reacted with fuels. There is a strong need to design and synthesize compounds to be used as long-term storable oxidizers or as stable electron-rich fuels.
PB Begell House
LK https://www.dl.begellhouse.com/journals/17bbb47e377ce023,64f5297d5d9b7178,2db31c1504d74f9e.html