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ID:32694896
大小:3.80 MB
页数:69页
时间:2019-02-14
《固体推进剂用氧化剂防吸湿、防结块技术研究》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、硕士论文固体推进剂用氧化剂防吸湿、防结块技术研究摘要二硝酰胺铵(ADN)由于具有能量高、不含卤素和化学稳定好等诸多良好性能,被认为是下一代低特征信号推进剂的候选氧化剂之一。而ADN的强吸湿性使得难以在固体推进剂中应用,因此对ADN进行表面改性处理以降低其吸湿性将非常有意义。本文采用液相包覆法和气相包覆法,选用多种材料对ADN粉体进行处理。实验表明,硬脂酸作为防潮剂,采用溶剂稀释液包覆法对ADN有明显的防吸湿作用,特别是在室温较高时更为显著。同时,依据盐桥作用造成超细高氯酸铵(AP)粉体结块的机理,提出用阻隔剂对超细AP进
2、行改性的防结块方法。实验证明,以双组分改性剂和分散载体结合的阻隔材料(颗粒),经过干法粉碎工艺,可达到比较理想的效果。改性后的超细AP,在常温下和适当的密封条件下存放两个月,基本不结块。制成固体推进剂后,推进剂的力学性能和燃烧性能有明显提高,其它理化特性无明显变化。这种干式改性工艺,操作简便,效果明显,具有工业化推广应用的前景。关键词:二硝酰胺铵,超细高氯酸铵,表面改性,防吸湿,抗结块,固体推进剂硕士论文AbstractADNisonooft11ecandidateexcellentoxidersbeingusedint
3、henextgenerationlowsignaturepropellantsduetoitsmanynicepropertiesofhighenergy,non-halogen,goodchemicalstabilityandSO011.However,ADNisdifficulttobeappliedinthesolidpropellantsbecauseofitsreadilymoistureabsorptionofADN.Itwillbesignificanttoreducemoistureabsorptionv
4、iamodificationofthesurfaceofADNpowders.Inthispaper,ADNpowersmodifiedwimseveralmaterialsmeansofcoatinginliquid-phaseandgasphase,respectively.TheexperimentalresultsthestearicacidcouldbeusedinthemoistureproofofADNpowders,especiallyatthehi曲roomtemperature,ifthemethod
5、ofcoatinginliquid-phaseWasused.Atthesametime,theanti—agglomerationmethodofmodifyingthesurfaceofultrafineAPpowdersusingthebarrierswereproposedaccordingtothemechanismofagglomerationresultedfromthesaltbridgesformedbetweentheUFAPparticles.Theexperimentalresultsshowth
6、atthebarriergrains,includingthedual—componentmodifiersandthedispersingcarriers,couldbeusedintheanti-agglomerationofUFAPpowderswhenthebarriergrainsandAPweresimultaneouslyjetmilled.ThemodifiedUFAPcouldbestrongedwitllwinlanti-agglomerationfortowmonthsatroomtemperatu
7、reandunderthepowderssealingconditions.WhenthemodifiedUFAPwereusedinthesolidpropdlant,themechanicalpropertyandcombustionpropertyWereobviouslyimproved,whiletheotherphysicalandchemicalpropertieswerehardlyaffected.ThisdrymodificationofUFAPshouldbereadilyappliedintoth
8、eindustrialproductionbecauseitWassimplyaperatedandthegoodresultcouldbeobtained.Keywords:ADN,ultrafmeAP,modificationofsurface,anti-moistureabsorption,anti—agglo
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