Influence of tailored CuO and Al/CuO nanothermites on the thermocatalytic degradation of nitrocellulose and combustion performance of AP/HTPB composite propellant

Zhao, Ningning; Ma, Hua; Yao, Ergang; Yu, Zhong; An, Ting; Zhao, Fengqi; Yu, Xiaojiao

doi:10.1007/s10570-021-04060-w

Cited by 25 publications

(8 citation statements)

References 73 publications

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“…This is similar to the thermal decomposition characteristics of NC(Zhao et al 2021). At T 2 , the absorption bands in the FTIR spectrum were corresponding to H 2 O, CO 2 , HCHO, and CO.…”

supporting

confidence: 82%

“…Evolution of the HCOOH gas was due to the secondary autocatalytic reactions of NC. At the end of the decomposition process (T f ), the FTIR absorption peaks of H 2 O, CO 2 , NO and HCOOH were still easily identi able in Fig.6(a)(Chai et al 2020;Zhao et al 2021). Figure6(b) presented the FTIR spectra of CMNC-2 at typical temperatures in the thermal decomposition.…”

mentioning

confidence: 95%

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Chemical modification of nitrocellulose by grafting sodium carboxymethyl

Liu

Ding

et al. 2022

Cellulose

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Introducing deterrents improves the thermal stability of nitrocellulose of propellant surface, but is accompanied with inevitable problems, such as migration, residue, smoke ame, and so on. In this paper, sodium carboxymethyl function groups were chemically grafted to nitrocellulose molecular chains by reaction of denitration and following etheri cation, which provide thermal stability, ame suppression ion without migration. Various structure characterizations were conducted and con rmed a sodium carboxymethyl-nitrocellulose (CMNC) was prepared successfully. The number of sodium carboxymethyl groups linked to nitrocellulose chains was affected by both denitration and etheri cation. The results showed that the thermal stability of CMNC improved with the increase of bearing sodium carboxymethyl groups and was better than that of original NC sample. Meanwhile, the thermal decomposition behaviors and decomposition products of CMNC are similar to that of NC at temperature of the rst DTG peak T 1 and that of CMC at temperatures of the second DTG peak T 2 . This work provided a way for designing gun propellant with progressive burning, anti-migration and ame suppression simultaneously.

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“…This is similar to the thermal decomposition characteristics of NC(Zhao et al 2021). At T 2 , the absorption bands in the FTIR spectrum were corresponding to H 2 O, CO 2 , HCHO, and CO.…”

supporting

confidence: 82%

mentioning

confidence: 95%

Chemical modification of nitrocellulose by grafting sodium carboxymethyl

Liu

Ding

et al. 2022

Cellulose

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“…This claim was supported by the findings reported by Dobrynin et al, who studied the feasibility of using supercritical antisolvent (SAS) processing to create nanoscale nitrocellulose (NC) [40]. They mentioned that nano-NC presents reduced friction sensitivity and lower decomposition temperatures than raw NC, while the early decomposition of NC/HNTO/MgAl-CuO and NNC/HNTO/MgAl-CuO composites compared to their NC and NNC matrices demonstrates the effective thermocatalytic effect of the used MgAl-CuO nanothermite [41].…”

Section: Tga Assessmentmentioning

confidence: 94%

Unraveling the Effect of MgAl/CuO Nanothermite on the Characteristics and Thermo-Catalytic Decomposition of Nanoenergetic Formulation Based on Nanostructured Nitrocellulose and Hydrazinium Nitro-Triazolone

et al. 2022

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The present study aims to develop new energetic composites containing nanostructured nitrocellulose (NNC) or nitrated cellulose (NC), hydrazinium nitro triazolone (HNTO), and MgAl-CuO nanothermite. The prepared energetic formulations (NC/HNTO/MgAl-CuO and NNC/HNTO/MgAl-CuO) were analyzed using various analytical techniques, such as Fourier-transform infrared (FTIR), scanning electron microscopy (SEM), thermogravimetry (TGA), and differential scanning calorimetry (DSC). The outstanding catalytic impact of MgAl-CuO on the thermal behavior of the developed energetic composites was elucidated by kinetic modeling, applied to the DSC data using isoconversional kinetic methods, for which a considerable drop in the activation energy was acquired for the prepared formulations, highlighting the catalytic influence of the introduced MgAl-CuO nanothermite. Overall, the obtained findings demonstrated that the newly elaborated NC/HNTO/MgAl-CuO and NNC/HNTO/MgAl-CuO composites could serve as promising candidates for application in the next generation of composite explosives and high-performance propellants.

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“…Previous studies have shown that the breakage of the O-NO 2 link marked the beginning of the thermal degradation of NC. 3,40 The majority of the NO 2 gas produced is kept in the polymer framework to support the subsequent autocatalytic processes. The ongoing reaction of NO 2 then encourages the formation of significant quantities of oxides.…”

Section: Resultsmentioning

confidence: 99%

“…It finds applications in diverse industries including civil and military sectors, such as dyes, adhesives, propellants, and projectiles. [1][2][3] However, due to its hazardous properties, such as high impact sensitivity and poor chemical stability, NC poses significant risks of fire and explosions. The combustion of nitrocellulose-based propellants often leads to afterburning or muzzle flames, resulting in reduced precision navigation capabilities, burns, and personnel ''blindness''.…”

Section: Introductionmentioning

confidence: 99%