石墨双炔/RDX复合物的热分解性能  

Thermal Decomposition Performance of Graphdiyne/RDX Composites

作　　者：曾见有 赵宁宁[2] 张婷 姚二岗[3] 赵凤起[3] 任莹辉[1] 马海霞[1] ZENG Jian-you;ZHAO Ning-ning;ZHANG Ting;YAO Er-gang;ZHAO Feng-qi;REN Ying-hui;MA Hai-xia(School of Chemical Engineering,Northwest University&Xi′an Key Laboratory of Special Energetic Materials,Xi′an 710069,China;School of Sciences,Xi′an University of Technology,Xi′an 710048,China;Science and Technology on Combustion and Explosion Laboratory,Xi′an Modern Chemistry Research Institute,Xi′an 710065,China)

机构地区：[1]西北大学化工学院&西安市特种能源材料重点实验室,陕西西安710069 [2]西安理工大学理学院,陕西西安710048 [3]西安近代化学研究所燃烧与爆炸技术重点实验室,陕西西安710065

出　　处：《火炸药学报》2021年第4期474-483,共10页Chinese Journal of Explosives & Propellants

基　　金：陕西省自然科学基金(No.2021JM-322);煤转化重点实验室基金(No.J20-21-904)。

摘　　要：为探究石墨双炔(GDY)对RDX热分解性能的影响,采用液相法制备出GDY,对其进行扫描电镜(SEM)、透射电镜(TEM)、X光电子能谱(XPS)、热重(TG)、红外(IR)表征;采用物理混合法将不同质量分数的GDY与环三亚甲基三硝胺(RDX)复合,用差示扫描量热仪(DSC)测试其热行为,并用Kissinger和Ozawa法进行动力学计算;用热重/红外/质谱联用仪(TG/IR/MS)研究GDY质量分数为5%的复合样品的热分解机理;根据GJB772A-97,采用DSC法进行相容性分析;从热分解峰温和活化能角度,比较了不同炭材料对RDX热分解的影响。结果表明,升温速率10℃/min、GDY质量分数为5%时,RDX热分解峰温升高2.97℃,活化能降低10.75kJ/mol;TG/IR/MS研究表明,加入GDY后,主要气体产物种类没有发生改变,但是CH2O和N_(2)O气体产物在较低的温度下即会产生,表明GDY的加入能够促进C—N键的断裂,从而促进RDX的热分解;相容性测试表明GDY与RDX不相容;相比纯RDX,石墨烯和多壁碳纳米管(CNT)使RDX的热分解活化能分别降低59.76kJ/mol和25.6kJ/mol,降低程度高于GDY,而富勒烯(C60)则使RDX的活化能升高37.17kJ/mol。In order to investigate the effect of graphdiyne(GDY)on the thermal decomposition performance of RDX,the GDY was prepared by liquid phase method,and it was characterized by scanning electron microscopy(SEM),transmission electron microscopy(TEM),X-ray photoelectron spectroscopy(XPS),thermogravimetry(TG)and infrared spectrum(IR).The composites with the different mass fraction of RDX(hexogen)and GDY were prepared by the physical mixing method,and the obtained composites were characterized by differential scanning calorimetry(DSC),and the kinetic analysis was performed using Kissinger and Ozawa methods.The sample with 5%GDY was tested by thermogravimetry/infrared spectrum/mass spectrometry(TG/IR/MS).According to GJB772A-97,the DSC method was used for the compatibility analysis,and the effects of different carbon materials such as graphene and multi-walled carbon nanotube(CNT),etc.on the thermal decomposition of RDX were compared by using the parameters including thermal decomposition peak temperature and activation energy.The results show that,upon the addition of 5%GDY,the peak temperature for the thermal decomposition of RDX increases by 2.97℃at a heating rate of 10℃/min,and the activation energy is reduced by 10.75kJ/mol.TG/IR/MS results show that the main gas products do not change after the addition of GDY.CH_(2)O and N_(2)O appear at a lower temperature,which indicates that the addition of GDY promotes the cleavage of the C—N bond,thus it promotes the thermal decomposition of RDX.The compatibility test shows that GDY is incompatible with RDX.Compared to the pure RDX,grapheme and CNT reduce the activation energy of RDX by 59.76 and 25.6kJ/mol,respectively.The value is higher than that of GDY.However,the activation energy of RDX is increased by 37.17kJ/mol by the addition of fullerene(C60).

关 键 词：物理化学 石墨双炔 GDY RDX 热分解 热重/红外/质谱(TG/IR/MS) 相容性 

分 类 号：TJ55[兵器科学与技术—军事化学与烟火技术] O64[理学—物理化学]