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Safe Fabrication, Thermal Decomposition Kinetics, and Mechanism of Nanoenergetic Composite NBC/CL-20

[Image: see text] Benefiting from the sol–gel technology and vacuum freeze-drying technology, a novel nanoenergetic composite material nitrated bacterial cellulose (NBC)/CL-20 (hexanitrohexaazaisowurtzitane) has been fabricated. The thermal decomposition kinetic and mechanism have been studied by th...

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Autores principales: Chen, Ling, He, Weidong, Liu, Jie
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2020
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7726958/
https://www.ncbi.nlm.nih.gov/pubmed/33324852
http://dx.doi.org/10.1021/acsomega.0c04958
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author Chen, Ling
He, Weidong
Liu, Jie
author_facet Chen, Ling
He, Weidong
Liu, Jie
author_sort Chen, Ling
collection PubMed
description [Image: see text] Benefiting from the sol–gel technology and vacuum freeze-drying technology, a novel nanoenergetic composite material nitrated bacterial cellulose (NBC)/CL-20 (hexanitrohexaazaisowurtzitane) has been fabricated. The thermal decomposition kinetic and mechanism have been studied by thermogravimetric analysis–differential scanning calorimetry (TG–DSC) under nonisothermal conditions in a nitrogen atmosphere at multiple heating rates; the process and mechanism of thermal decomposition of NBC/CL-20(1:1) have also been probed by TG–DSC–IR. The kinetic and thermodynamic parameters, such as activation energy (E(a)), per-exponent factor (ln A(K)), rate constant (k), activation heat (ΔH(⧧)), activation free energy (ΔG(⧧)), and activation entropy (ΔS(⧧)) are calculated. The results indicate that NBC/CL-20 presents much lower activation energy than both of raw NBC and raw NC, and NBC/CL-20(1:1) exhibits superior thermal performance of heat release and E(a). Moreover, there the existence mechanism has also been probed between NBC and CL-20 during the process of thermal decomposition. The structure and composition have been characterized by a series of characterization methods and indicate that CL-20 has been embedded homogenously in the NBC gel matrix with a prominent porous cross-linked network structure. The impact and friction sensitivities have also been decreased. The whole process effectively avoids high temperatures, and thus ensures operational safety.
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spelling pubmed-77269582020-12-14 Safe Fabrication, Thermal Decomposition Kinetics, and Mechanism of Nanoenergetic Composite NBC/CL-20 Chen, Ling He, Weidong Liu, Jie ACS Omega [Image: see text] Benefiting from the sol–gel technology and vacuum freeze-drying technology, a novel nanoenergetic composite material nitrated bacterial cellulose (NBC)/CL-20 (hexanitrohexaazaisowurtzitane) has been fabricated. The thermal decomposition kinetic and mechanism have been studied by thermogravimetric analysis–differential scanning calorimetry (TG–DSC) under nonisothermal conditions in a nitrogen atmosphere at multiple heating rates; the process and mechanism of thermal decomposition of NBC/CL-20(1:1) have also been probed by TG–DSC–IR. The kinetic and thermodynamic parameters, such as activation energy (E(a)), per-exponent factor (ln A(K)), rate constant (k), activation heat (ΔH(⧧)), activation free energy (ΔG(⧧)), and activation entropy (ΔS(⧧)) are calculated. The results indicate that NBC/CL-20 presents much lower activation energy than both of raw NBC and raw NC, and NBC/CL-20(1:1) exhibits superior thermal performance of heat release and E(a). Moreover, there the existence mechanism has also been probed between NBC and CL-20 during the process of thermal decomposition. The structure and composition have been characterized by a series of characterization methods and indicate that CL-20 has been embedded homogenously in the NBC gel matrix with a prominent porous cross-linked network structure. The impact and friction sensitivities have also been decreased. The whole process effectively avoids high temperatures, and thus ensures operational safety. American Chemical Society 2020-11-27 /pmc/articles/PMC7726958/ /pubmed/33324852 http://dx.doi.org/10.1021/acsomega.0c04958 Text en © 2020 American Chemical Society This is an open access article published under a Creative Commons Non-Commercial No Derivative Works (CC-BY-NC-ND) Attribution License (http://pubs.acs.org/page/policy/authorchoice_ccbyncnd_termsofuse.html) , which permits copying and redistribution of the article, and creation of adaptations, all for non-commercial purposes.
spellingShingle Chen, Ling
He, Weidong
Liu, Jie
Safe Fabrication, Thermal Decomposition Kinetics, and Mechanism of Nanoenergetic Composite NBC/CL-20
title Safe Fabrication, Thermal Decomposition Kinetics, and Mechanism of Nanoenergetic Composite NBC/CL-20
title_full Safe Fabrication, Thermal Decomposition Kinetics, and Mechanism of Nanoenergetic Composite NBC/CL-20
title_fullStr Safe Fabrication, Thermal Decomposition Kinetics, and Mechanism of Nanoenergetic Composite NBC/CL-20
title_full_unstemmed Safe Fabrication, Thermal Decomposition Kinetics, and Mechanism of Nanoenergetic Composite NBC/CL-20
title_short Safe Fabrication, Thermal Decomposition Kinetics, and Mechanism of Nanoenergetic Composite NBC/CL-20
title_sort safe fabrication, thermal decomposition kinetics, and mechanism of nanoenergetic composite nbc/cl-20
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7726958/
https://www.ncbi.nlm.nih.gov/pubmed/33324852
http://dx.doi.org/10.1021/acsomega.0c04958
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