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Gismatulina YA, Budaeva VV. Cellulose Nitrates-Blended Composites from Bacterial and Plant-Based Celluloses. Polymers (Basel) 2024; 16:1183. [PMID: 38732653 PMCID: PMC11085800 DOI: 10.3390/polym16091183] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2024] [Revised: 04/20/2024] [Accepted: 04/21/2024] [Indexed: 05/13/2024] Open
Abstract
Cellulose nitrates (CNs)-blended composites based on celluloses of bacterial origin (bacterial cellulose (BC)) and plant origin (oat-hull cellulose (OHC)) were synthesized in this study for the first time. Novel CNs-blended composites made of bacterial and plant-based celluloses with different BC-to-OHC mass ratios of 70/30, 50/50, and 30/70 were developed and fully characterized, and two methods were employed to nitrate the initial BC and OHC, and the three cellulose blends: the first method involved the use of sulfuric-nitric mixed acids (MAs), while the second method utilized concentrated nitric acid in the presence of methylene chloride (NA + MC). The CNs obtained using these two nitration methods were found to differ between each other, most notably, in viscosity: the samples nitrated with NA + MC had an extremely high viscosity of 927 mPa·s through to the formation of an immobile transparent acetonogel. Irrespective of the nitration method, the CN from BC (CN BC) was found to exhibit a higher nitrogen content than the CN from OHC (CN OHC), 12.20-12.32% vs. 11.58-11.60%, respectively. For the starting BC itself, all the cellulose blends of the starting celluloses and their CNs were detected using the SEM technique to have a reticulate fiber nanostructure. The cellulose samples and their CNs were detected using the IR spectroscopy to have basic functional groups. TGA/DTA analyses of the starting cellulose samples and the CNs therefrom demonstrated that the synthesized CN samples were of high purity and had high specific heats of decomposition at 6.14-7.13 kJ/g, corroborating their energy density. The CN BC is an excellent component with in-demand energetic performance; in particular, it has a higher nitrogen content while having a stable nanostructure. The CN BC was discovered to have a positive impact on the stability, structure, and energetic characteristics of the composites. The presence of CN OHC can make CNs-blended composites cheaper. These new CNs-blended composites made of bacterial and plant celluloses are much-needed in advanced, high-performance energetic materials.
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Affiliation(s)
- Yulia A. Gismatulina
- Bioconversion Laboratory, Institute for Problems of Chemical and Energetic Technologies, Siberian Branch of the Russian Academy of Sciences (IPCET SB RAS), Biysk 659322, Russia;
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Kashcheyeva EI, Korchagina AA, Gismatulina YA, Gladysheva EK, Budaeva VV, Sakovich GV. Simultaneous Production of Cellulose Nitrates and Bacterial Cellulose from Lignocellulose of Energy Crop. Polymers (Basel) 2023; 16:42. [PMID: 38201707 PMCID: PMC10780700 DOI: 10.3390/polym16010042] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2023] [Revised: 12/11/2023] [Accepted: 12/20/2023] [Indexed: 01/12/2024] Open
Abstract
This study is focused on exploring the feasibility of simultaneously producing the two products, cellulose nitrates (CNs) and bacterial cellulose (BC), from Miscanthus × giganteus. The starting cellulose for them was isolated by successive treatments of the feedstock with HNO3 and NaOH solutions. The cellulose was subjected to enzymatic hydrolysis for 2, 8, and 24 h. The cellulose samples after the hydrolysis were distinct in structure from the starting sample (degree of polymerization (DP) 1770, degree of crystallinity (DC) 64%) and between each other (DP 1510-1760, DC 72-75%). The nitration showed that these samples and the starting cellulose could successfully be nitrated to furnish acetone-soluble CNs. Extending the hydrolysis time from 2 h to 24 h led to an enhanced yield of CNs from 116 to 131%, with the nitrogen content and the viscosity of the CN samples increasing from 11.35 to 11.83% and from 94 to 119 mPa·s, respectively. The SEM analysis demonstrated that CNs retained the fiber shape. The IR spectroscopy confirmed that the synthesized material was specifically CNs, as evidenced by the characteristic frequencies of 1657-1659, 1277, 832-833, 747, and 688-690 cm-1. Nutrient media derived from the hydrolyzates obtained in 8 h and 24 h were of good quality for the synthesis of BC, with yields of 11.1% and 9.6%, respectively. The BC samples had a reticulate structure made of interlaced microfibrils with 65 and 81 nm widths and DPs of 2100 and 2300, respectively. It is for the first time that such an approach for the simultaneous production of CNs and BC has been employed.
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Affiliation(s)
- Ekaterina I. Kashcheyeva
- Bioconversion Laboratory, Institute for Problems of Chemical and Energetic Technologies, Siberian Branch of the Russian Academy of Sciences (IPCET SB RAS), 659322 Biysk, Russia; (A.A.K.); (Y.A.G.); (V.V.B.)
| | | | | | - Evgenia K. Gladysheva
- Bioconversion Laboratory, Institute for Problems of Chemical and Energetic Technologies, Siberian Branch of the Russian Academy of Sciences (IPCET SB RAS), 659322 Biysk, Russia; (A.A.K.); (Y.A.G.); (V.V.B.)
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Gismatulina YA. Promising Energetic Polymers from Nanostructured Bacterial Cellulose. Polymers (Basel) 2023; 15:polym15092213. [PMID: 37177359 PMCID: PMC10180746 DOI: 10.3390/polym15092213] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2023] [Revised: 05/03/2023] [Accepted: 05/04/2023] [Indexed: 05/15/2023] Open
Abstract
This study investigated the nitration of nanostructured bacterial cellulose (NBC). The NBC, obtained using symbiotic Medusomyces gisevii Sa-12 as the microbial producer and then freeze-dried, was nitrated herein by two methods, the first using mixed sulphuric-nitric acids (MA) and the second using concentrated nitric acid in the presence of methylene chloride (NA+MC). The synthesized samples of NBC nitrates (NBCNs) exhibited 11.77-12.27% nitrogen content, a viscosity of 1086 mPa·s or higher, 0.7-14.5% solubility in an alcohol-ester mixture, and 0.002% ash. Scanning electron microscopy showed that the nitration compacted the NBC structure, with the original reticulate pattern of the structure being preserved in full. Infrared spectroscopy for the presence of functional nitro groups at 1658-1659, 1280, 838-840, 749-751 and 693-694 cm-1 confirmed the synthesis of cellulose nitrates in particular. Thermogravimetric and differential thermal analyses showed the resultant NBCNs to have a high purity and high specific heats of decomposition of 6.94-7.08 kJ/g. The NBCN samples differ conceptually from plant-based cellulose nitrates by having a viscosity above 1086 mPa·s and a unique 3D reticulate structure that is retained during the nitration. The findings suggest that the NBCNs can be considered for use in novel high-tech materials and science-driven fields distinct from the application fields of plant-based cellulose nitrates. The NBCN sample obtained with NA+MC has the ability to generate an organogel when it is dissolved in acetone. Because of the said property, this NBCN sample can find use as a classical adhesive scaffold and an energetic gel matrix for creating promising energetic polymers.
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Affiliation(s)
- Yulia A Gismatulina
- Bioconversion Laboratory, Institute for Problems of Chemical and Energetic Technologies, Siberian Branch of the Russian Academy of Sciences (IPCET SB RAS), Biysk 659322, Russia
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Plachouras NV, Pitsikalis M. Statistical Copolymers of N-Vinylpyrrolidone and 2-Chloroethyl Vinyl Ether via Radical RAFT Polymerization: Monomer Reactivity Ratios, Thermal Properties, and Kinetics of Thermal Decomposition of the Statistical Copolymers. Polymers (Basel) 2023; 15:polym15081970. [PMID: 37112117 PMCID: PMC10142009 DOI: 10.3390/polym15081970] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2023] [Revised: 04/18/2023] [Accepted: 04/19/2023] [Indexed: 04/29/2023] Open
Abstract
The radical statistical copolymerization of N-vinyl pyrrolidone (NVP) and 2-chloroethyl vinyl ether (CEVE) was conducted using the Reversible Addition-Fragmentation chain Transfer (RAFT) polymerization technique, employing [(O-ethylxanthyl)methyl]benzene (CTA-1) and O-ethyl S-(phthalimidylmethyl) xanthate (CTA-2) as the Chain Transfer Agents (CTAs), leading to P(NVP-stat-CEVE) products. After optimizing copolymerization conditions, monomer reactivity ratios were estimated using various linear graphical methods, as well as the COPOINT program, which was applied in the framework of the terminal model. Structural parameters of the copolymers were obtained by calculating the dyad sequence fractions and the monomers' mean sequence lengths. Thermal properties of the copolymers were studied by Differential Scanning Calorimetry (DSC) and kinetics of their thermal degradation by Thermogravimetric Analysis (TGA) and Differential Thermogravimetry (DTG), applying the isoconversional methodologies of Ozawa-Flynn-Wall (OFW) and Kissinger-Akahira-Sunose (KAS).
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Affiliation(s)
- Nikolaos V Plachouras
- Industrial Chemistry Laboratory, Department of Chemistry, National and Kapodistrian University of Athens, Panepistimiopolis Zografou, 15771 Athens, Greece
| | - Marinos Pitsikalis
- Industrial Chemistry Laboratory, Department of Chemistry, National and Kapodistrian University of Athens, Panepistimiopolis Zografou, 15771 Athens, Greece
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Giannopoulos DK, Zorba LP, Zisis C, Pitsikalis M, Vougioukalakis GC. A3 polycondensation: A multicomponent step-growth polymerization reaction for the synthesis of polymeric propargylamines. Eur Polym J 2023. [DOI: 10.1016/j.eurpolymj.2023.112056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/04/2023]
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Posidonia oceanica (L.) Delile: A Mediterranean seagrass with potential applications but regularly and erroneously referred to as an algal species. Int J Biol Macromol 2023; 230:122624. [PMID: 36403775 DOI: 10.1016/j.ijbiomac.2022.11.169] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Posidonia oceanica (L.) Delile is one of the most abundant aquatic vascular higher plants in the Mediterranean Sea belonging to Posidoniaceas family. It is considered as a valuable natural source for multiple uses either for ecological functions or industrial applications. Nevertheless, this marine phanerogam is commonly confused with macroalgae, or seaweeds, known also as cryptogams. The present note intends to discuss the mis-use of the associated terminology of P. oceanica as algae in the scientific literature in order to avoid the widespread of this issue in the future. Thus, an extensive assessment of some important published woks has been conducted. This note will certainly allow the accurate nomenclature of this promising endemic species, which will continue its valorizations' ascension in several potential applications.
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Thermal decomposition behavior and kinetic study of nitrocellulose in presence of ternary nanothermites with different oxidizers. FIREPHYSCHEM 2023. [DOI: 10.1016/j.fpc.2023.02.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/13/2023] Open
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Fabrication of Cellulose Nanocrystal (CNCs) Based Biosorbent From Oil Palm Trunks Through Acid Hydrolysis With Sonication Assisted and Adsorption Kinetic Study. JURNAL KIMIA SAINS DAN APLIKASI 2022. [DOI: 10.14710/jksa.25.9.307-315] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
Developing cellulose nanocrystal (CNCs) preparation techniques is a challenge confronted by many researchers. The advantages of property remain the reason for research to be developed. To deal with this issue, it is essential to conduct research related to process optimization, particularly in the hydrolysis process, which is the primary step in forming CNCs. In this study, the effect of sonication-assisted hydrolysis time was investigated. XRD characterization showed that the CNCs formed where the first group with specific peaks indicated. The crystallinity of CNCs decreased with increasing sonication duration, indicating that sonication-assisted hydrolysis was nonselective. The crystallinity of CNCs obtained for 15, 30, and 45 min was 61.6, 55.0, and 48.4 %, respectively. For sonication duration variations of 15, 30, and 45 min, the hydration diameter of CNCs was nearly identical at 42.35 ± 27.10, 42.99 ± 29.46, and 42.63 ± 29.49 nm, respectively. Similarly, the removal of methylene blue can be achieved using CNCs bio-adsorbent. The results of percent removal of methylene blue under sonication treatment of 15, 30, and 45 min of sonication were 73.34; 73.62; 72.86 %, respectively. The adsorption rate of CNCs follows the pseudo-second-order kinetic model, with the adsorption values under sonication treatment of 15, 30, and 45 min were 0.075 ± 0.008; 0.166 ± 0.013; 0.078 ± 0.005 g mg-1 min-1, respectively.
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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. Catalysts 2022. [DOI: 10.3390/catal12121573] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
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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Benhammada A, Trache D, Chelouche S. Catalytic effect investigation of α-Fe2O3 and α-Fe2O3-CMS nanocomposites on the thermal behavior of NC/DGEDN mixture: DSC measurements and kinetic modeling. J INDIAN CHEM SOC 2022. [DOI: 10.1016/j.jics.2022.100838] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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Prusskii AI, Aleshina LA, Lyukhanova IV, Sidorova OV, Budaeva VV, Sakovich GV. Model of the Atomic Molecular Structure of Miscanthus Sacchariflonis Cellulose Nitrates. POLYMER SCIENCE SERIES A 2022. [DOI: 10.1134/s0965545x22700481] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/09/2023]
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Dou J, Xu M, Tan B, Lu X, Mo H, Wang B, Liu N. Research Progress of Nitrate Ester Binders. FIREPHYSCHEM 2022. [DOI: 10.1016/j.fpc.2022.09.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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Chalghoum F, Trache D, Benziane M, Benhammada A. Effect of micro- and nano-CuO on the thermal decomposition kinetics of high-performance aluminized composite solid propellants containing complex metal hydrides. FIREPHYSCHEM 2022. [DOI: 10.1016/j.fpc.2022.03.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
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Santos VO, Araujo RO, Ribeiro FCP, Colpani D, Lima VMR, Tenório JAS, Coleti J, Falcão NPS, Chaar JS, de Souza LKC. Analysis of thermal degradation of peach palm (Bactris gasipaes Kunth) seed using isoconversional models. REACTION KINETICS MECHANISMS AND CATALYSIS 2022. [DOI: 10.1007/s11144-021-02140-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Tarchoun AF, Trache D, Klapötke TM, Slimani K, Belouettar B, Abdelaziz A, Bekhouche S, Bessa W. Valorization of Esparto Grass Cellulosic Derivatives for the Development of Promising Energetic Azidodeoxy Biopolymers: Synthesis, Characterization and Isoconversional Thermal Kinetic Analysis. PROPELLANTS EXPLOSIVES PYROTECHNICS 2022. [DOI: 10.1002/prep.202100293] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Ahmed Fouzi Tarchoun
- Energetic Materials Laboratory Teaching and Research unit of Energetic Processes Ecole Militaire Polytechnique BP 17, Bordj El-Bahri 16046 Algiers Algeria
- Energetic Propulsion Laboratory Teaching and Research unit of Energetic Processes Ecole Militaire Polytechnique BP 17, Bordj El-Bahri 16046 Algiers Algeria
| | - Djalal Trache
- Energetic Materials Laboratory Teaching and Research unit of Energetic Processes Ecole Militaire Polytechnique BP 17, Bordj El-Bahri 16046 Algiers Algeria
| | - Thomas M. Klapötke
- Department of Chemistry Ludwig Maximilian University Butenandtstrasse 5–13 (D) D-81377 Munich Germany
| | - Kheireddine Slimani
- Energetic Materials Laboratory Teaching and Research unit of Energetic Processes Ecole Militaire Polytechnique BP 17, Bordj El-Bahri 16046 Algiers Algeria
| | - Baha‐eddine Belouettar
- Energetic Materials Laboratory Teaching and Research unit of Energetic Processes Ecole Militaire Polytechnique BP 17, Bordj El-Bahri 16046 Algiers Algeria
| | - Amir Abdelaziz
- Energetic Materials Laboratory Teaching and Research unit of Energetic Processes Ecole Militaire Polytechnique BP 17, Bordj El-Bahri 16046 Algiers Algeria
| | - Slimane Bekhouche
- Energetic Materials Laboratory Teaching and Research unit of Energetic Processes Ecole Militaire Polytechnique BP 17, Bordj El-Bahri 16046 Algiers Algeria
| | - Wissam Bessa
- Energetic Materials Laboratory Teaching and Research unit of Energetic Processes Ecole Militaire Polytechnique BP 17, Bordj El-Bahri 16046 Algiers Algeria
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Touidjine S, Boulkadid KM, Trache D, Belkhiri S, Mezroua A. Preparation and Characterization of Polyurethane/Nitrocellulose Blends as Binder for Composite Solid Propellants. PROPELLANTS EXPLOSIVES PYROTECHNICS 2022. [DOI: 10.1002/prep.202000340] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Sabri Touidjine
- Energetic Propulsion Laboratory Teaching and Research unit of Energetic Processes Ecole Militaire Polytechnique BP 17, Bordj-El-Bahri 16046 Algiers Algeria
| | - Karim Moulai Boulkadid
- Energetic Propulsion Laboratory Teaching and Research unit of Energetic Processes Ecole Militaire Polytechnique BP 17, Bordj-El-Bahri 16046 Algiers Algeria
| | - Djalal Trache
- Energetic Materials Laboratory Teaching and Research unit of Energetic Processes Ecole Militaire Polytechnique BP 17, Bordj-El-Bahri 16046 Algiers Algeria
| | - Samir Belkhiri
- Energetic Propulsion Laboratory Teaching and Research unit of Energetic Processes Ecole Militaire Polytechnique BP 17, Bordj-El-Bahri 16046 Algiers Algeria
| | - Abderrahmane Mezroua
- Energetic Materials Laboratory Teaching and Research unit of Energetic Processes Ecole Militaire Polytechnique BP 17, Bordj-El-Bahri 16046 Algiers Algeria
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Hanafi S, Trache D, Mezroua A, Boukeciat H, Meziani R, Tarchoun AF, Abdelaziz A. Optimized energetic HNTO/AN co-crystal and its thermal decomposition kinetics in the presence of energetic coordination nanomaterials based on functionalized graphene oxide and cobalt. RSC Adv 2021; 11:35287-35299. [PMID: 35493178 PMCID: PMC9043024 DOI: 10.1039/d1ra06367g] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2021] [Accepted: 10/21/2021] [Indexed: 12/12/2022] Open
Abstract
The present research aims to select the optimal molar ratio of hydrazine 3-nitro-1,2,4-triazol-5-one (HNTO) and ammonium nitrate (AN) to produce an energetic co-crystal. For a comparison purpose, the heat release, cost, density and hygroscopicity of the different co-crystals were evaluated. The obtained results indicated that HNTO/AN at the 1 : 3 ratio exhibited a higher heat release, better thermal stability, low water content and a reasonable cost, compared to other co-crystals. This new co-crystal was fully characterized through powder X-ray diffraction (XRD), infrared spectroscopy (FTIR) and differential scanning calorimetry (DSC), confirming that this latter displayed similar characteristics to those of the co-crystal with a 1 : 1 ratio, which was recently developed. On the other hand, the catalytic activity of two energetic coordination polymers of triaminoguanidine-cobalt (T-Co) complexes, with or without graphene oxide (GO-T-Co-T), on the thermolysis of the developed co-crystal has been also assessed by DSC under non-isothermal conditions. It is revealed that these catalysts have greatly decreased the decomposition temperature of the HNTO/AN cocrystal. Moreover, because of the complete decomposition in the case of the (HNTO/AN)/GO-T-Co-T composite, the heat release has been increased as well. Isoconversional integral kinetic methods were exploited to determine the kinetic parameters of the different systems. According to the obtained results, these catalysts have a strong catalytic action on the decomposition of the co-crystal AN/HNTO for which the activation energy and the pre-exponential factor are considerably lowered. Consequently, the developed co-crystal and the energetic catalysts could be considered as potential ingredients for the next generation of composite solid propellant formulations.
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Affiliation(s)
- Sabrina Hanafi
- Energetic Materials Laboratory, Teaching and Research Unit of Energetic Processes, Ecole Militaire Polytechnique BP 17, Bordj El-Bahri Algiers 16046 Algeria
| | - Djalal Trache
- Energetic Materials Laboratory, Teaching and Research Unit of Energetic Processes, Ecole Militaire Polytechnique BP 17, Bordj El-Bahri Algiers 16046 Algeria
| | - Abderrahmane Mezroua
- Energetic Materials Laboratory, Teaching and Research Unit of Energetic Processes, Ecole Militaire Polytechnique BP 17, Bordj El-Bahri Algiers 16046 Algeria
| | - Hani Boukeciat
- Energetic Materials Laboratory, Teaching and Research Unit of Energetic Processes, Ecole Militaire Polytechnique BP 17, Bordj El-Bahri Algiers 16046 Algeria
| | - Redha Meziani
- Energetic Materials Laboratory, Teaching and Research Unit of Energetic Processes, Ecole Militaire Polytechnique BP 17, Bordj El-Bahri Algiers 16046 Algeria
| | - Ahmed Fouzi Tarchoun
- Energetic Materials Laboratory, Teaching and Research Unit of Energetic Processes, Ecole Militaire Polytechnique BP 17, Bordj El-Bahri Algiers 16046 Algeria
- Energetic Propulsion Laboratory, Teaching and Research Unit of Energetic Processes, Ecole Militaire Polytechnique BP 17, Bordj El-Bahri Algiers 16046 Algeria
| | - Amir Abdelaziz
- Energetic Materials Laboratory, Teaching and Research Unit of Energetic Processes, Ecole Militaire Polytechnique BP 17, Bordj El-Bahri Algiers 16046 Algeria
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Thermal Stability and Kinetics of Thermal Decomposition of Statistical Copolymers of N-Vinylpyrrolidone and Alkyl Methacrylates Synthesized via RAFT Polymerization. J CHEM-NY 2021. [DOI: 10.1155/2021/6633052] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
The thermal stability and the kinetics of thermal decomposition of statistical copolymers of N-vinylpyrrolidone (NVP) with the alkyl methacrylates, hexyl methacrylate (HMA) and stearyl methacrylate (SMA), were studied by Thermogravimetric Analysis (TGA) and Differential Thermogravimetry (DTG). Statistical copolymers of different compositions were studied, and their thermal decomposition behavior was compared to the corresponding homopolymers. The activation energies of the thermal decomposition were calculated using the Ozawa-Flynn-Wall, the Kissinger, and the Kissinger-Akahira-Sunose methodologies. The effects of the nature of the methacrylate monomer, the copolymer composition, and the rate of heating are discussed.
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Kokkorogianni O, Kontoes-Georgoudakis P, Athanasopoulou M, Polizos N, Pitsikalis M. Statistical Copolymers of N-Vinylpyrrolidone and Isobornyl Methacrylate via Free Radical and RAFT Polymerization: Monomer Reactivity Ratios, Thermal Properties, and Kinetics of Thermal Decomposition. Polymers (Basel) 2021; 13:778. [PMID: 33802615 PMCID: PMC7961878 DOI: 10.3390/polym13050778] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Revised: 02/25/2021] [Accepted: 02/26/2021] [Indexed: 11/17/2022] Open
Abstract
The synthesis of statistical copolymers of N-vinylpyrrolidone (NVP) with isobornyl methacrylate (IBMA) was conducted by free radical and reversible addition-fragmentation chain transfer (RAFT) polymerization. The reactivity ratios were estimated using the Finemann-Ross, inverted Fineman-Ross, Kelen-Tüdos, extended Kelen-Tüdos and Barson-Fenn graphical methods, along with the computer program COPOINT, modified to both the terminal and the penultimate models. According to COPOINT the reactivity ratios were found to be equal to 0.292 for NVP and 2.673 for IBMA for conventional radical polymerization, whereas for RAFT polymerization and for the penultimate model the following reactivity ratios were obtained: r11 = 4.466, r22 = 0, r21 = 14.830, and r12 = 0 (1 stands for NVP and 2 for IBMA). In all cases, the NVP reactivity ratio was significantly lower than that of IBMA. Structural parameters of the copolymers were obtained by calculating the dyad sequence fractions and the mean sequence length. The thermal properties of the copolymers were studied by differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), and differential thermogravimetry (DTG). The results were compared with those of the respective homopolymers.
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Affiliation(s)
| | | | | | | | - Marinos Pitsikalis
- Industrial Chemistry Laboratory, Department of Chemistry, National and Kapodistrian University of Athens, Panepistimiopolis Zografou, 15771 Athens, Greece; (O.K.); (P.K.-G.); (M.A.); (N.P.)
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Tarchoun AF, Trache D, Klapötke TM, Selmani A, Saada M, Chelouche S, Mezroua A, Abdelaziz A. New insensitive high-energy dense biopolymers from giant reed cellulosic fibers: their synthesis, characterization, and non-isothermal decomposition kinetics. NEW J CHEM 2021. [DOI: 10.1039/d0nj05484d] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Renewable giant reed has been explored for the first time to develop new advanced high-energy dense biopolymers through carbamate surface functionalization and nitration of native cellulose and cellulose microcrystals.
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Affiliation(s)
- Ahmed Fouzi Tarchoun
- Energetic Materials Laboratory
- Teaching and Research Unit of Energetic Processes
- Ecole Militaire Polytechnique
- Algeria
- Energetic Propulsion Laboratory
| | - Djalal Trache
- Energetic Materials Laboratory
- Teaching and Research Unit of Energetic Processes
- Ecole Militaire Polytechnique
- Algeria
| | - Thomas M. Klapötke
- Energetic Propulsion Laboratory
- Teaching and Research Unit of Energetic Processes
- Ecole Militaire Polytechnique
- Algeria
| | - Aimen Selmani
- Energetic Materials Laboratory
- Teaching and Research Unit of Energetic Processes
- Ecole Militaire Polytechnique
- Algeria
| | - Mohamed Saada
- Energetic Materials Laboratory
- Teaching and Research Unit of Energetic Processes
- Ecole Militaire Polytechnique
- Algeria
| | - Salim Chelouche
- Energetic Materials Laboratory
- Teaching and Research Unit of Energetic Processes
- Ecole Militaire Polytechnique
- Algeria
| | - Abderrahmane Mezroua
- Energetic Materials Laboratory
- Teaching and Research Unit of Energetic Processes
- Ecole Militaire Polytechnique
- Algeria
| | - Amir Abdelaziz
- Energetic Materials Laboratory
- Teaching and Research Unit of Energetic Processes
- Ecole Militaire Polytechnique
- Algeria
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Javadinejad HR, Ebrahimi‐Kahrizsangi R. Thermal and kinetic study of hydroxyapatite formation by solid‐state reaction. INT J CHEM KINET 2020. [DOI: 10.1002/kin.21467] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Hamid Reza Javadinejad
- Advanced Materials Research Center Department of Materials Engineering Najafabad Branch Islamic Azad University Najafabad Iran
| | - Reza Ebrahimi‐Kahrizsangi
- Advanced Materials Research Center Department of Materials Engineering Najafabad Branch Islamic Azad University Najafabad Iran
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Tarchoun AF, Trache D, Klapötke TM, Belmerabet M, Abdelaziz A, Derradji M, Belgacemi R. Synthesis, Characterization, and Thermal Decomposition Kinetics of Nitrogen-Rich Energetic Biopolymers from Aminated Giant Reed Cellulosic Fibers. Ind Eng Chem Res 2020. [DOI: 10.1021/acs.iecr.0c05448] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Ahmed Fouzi Tarchoun
- Energetic Materials Laboratory, Teaching and Research Unit of Energetic Processes, Ecole Militaire Polytechnique, BP 17, Bordj El-Bahri, 16046 Algiers, Algeria
- Energetic Propulsion Laboratory, Teaching and Research Unit of Energetic Processes, Ecole Militaire Polytechnique, BP 17, Bordj El-Bahri, 16046 Algiers, Algeria
- Department of Chemistry, Ludwig Maximilian University, Butenandtstrasse 5-13(D), D-81377 Munich, Germany
| | - Djalal Trache
- Energetic Materials Laboratory, Teaching and Research Unit of Energetic Processes, Ecole Militaire Polytechnique, BP 17, Bordj El-Bahri, 16046 Algiers, Algeria
| | - Thomas M. Klapötke
- Department of Chemistry, Ludwig Maximilian University, Butenandtstrasse 5-13(D), D-81377 Munich, Germany
| | - Mekki Belmerabet
- Energetic Materials Laboratory, Teaching and Research Unit of Energetic Processes, Ecole Militaire Polytechnique, BP 17, Bordj El-Bahri, 16046 Algiers, Algeria
| | - Amir Abdelaziz
- Energetic Materials Laboratory, Teaching and Research Unit of Energetic Processes, Ecole Militaire Polytechnique, BP 17, Bordj El-Bahri, 16046 Algiers, Algeria
| | - Mehdi Derradji
- Process Engineering Laboratory, Teaching and Research Unit of Energetic Processes, Ecole Militaire Polytechnique, BP 17, Bordj El-Bahri, 16046 Algiers, Algeria
| | - Raouf Belgacemi
- Process Engineering Laboratory, Teaching and Research Unit of Energetic Processes, Ecole Militaire Polytechnique, BP 17, Bordj El-Bahri, 16046 Algiers, Algeria
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Fodil Cherif M, Trache D, Benaliouche F, Tarchoun AF, Chelouche S, Mezroua A. Organosolv lignins as new stabilizers for cellulose nitrate: Thermal behavior and stability assessment. Int J Biol Macromol 2020; 164:794-807. [DOI: 10.1016/j.ijbiomac.2020.07.024] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2020] [Revised: 06/14/2020] [Accepted: 07/03/2020] [Indexed: 12/26/2022]
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Characterization of raw and treated Arundo donax L. cellulosic fibers and their effect on the curing kinetics of bisphenol A-based benzoxazine. Int J Biol Macromol 2020; 164:2931-2943. [DOI: 10.1016/j.ijbiomac.2020.08.179] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Revised: 08/19/2020] [Accepted: 08/22/2020] [Indexed: 11/21/2022]
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Trache D, Thakur VK, Boukherroub R. Cellulose Nanocrystals/Graphene Hybrids-A Promising New Class of Materials for Advanced Applications. NANOMATERIALS (BASEL, SWITZERLAND) 2020; 10:E1523. [PMID: 32759691 PMCID: PMC7466521 DOI: 10.3390/nano10081523] [Citation(s) in RCA: 56] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Revised: 07/28/2020] [Accepted: 07/31/2020] [Indexed: 02/07/2023]
Abstract
With the growth of global fossil-based resource consumption and the environmental concern, there is an urgent need to develop sustainable and environmentally friendly materials, which exhibit promising properties and could maintain an acceptable level of performance to substitute the petroleum-based ones. As elite nanomaterials, cellulose nanocrystals (CNC) derived from natural renewable resources, exhibit excellent physicochemical properties, biodegradability and biocompatibility and have attracted tremendous interest nowadays. Their combination with other nanomaterials such as graphene-based materials (GNM) has been revealed to be useful and generated new hybrid materials with fascinating physicochemical characteristics and performances. In this context, the review presented herein describes the quickly growing field of a new emerging generation of CNC/GNM hybrids, with a focus on strategies for their preparation and most relevant achievements. These hybrids showed great promise in a wide range of applications such as separation, energy storage, electronic, optic, biomedical, catalysis and food packaging. Some basic concepts and general background on the preparation of CNC and GNM as well as their key features are provided ahead.
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Affiliation(s)
- Djalal Trache
- Energetic Materials Laboratory, Teaching and Research Unit of Energetic Processes, Ecole Militaire Polytechnique, BP 17, Bordj El-Bahri, 16046 Algiers, Algeria
| | - Vijay Kumar Thakur
- Biorefining and Advanced Materials Research Center, Scotland’s Rural College (SRUC), Kings Buildings, Edinburgh EH9 3JG, UK;
- Department of Mechanical Engineering, School of Engineering, Shiv Nadar University, Greater Noida, Uttar Pradesh 201314, India
| | - Rabah Boukherroub
- Institut d’Electronique, de Microélectronique et de Nanotechnologie (IEMN-UMR CNRS 8520), University Lille, CNRS, Centrale Lille, University Polytechnique Hauts-de-France, UMR 8520—IEMN, F-59000 Lille, France;
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Study on the stability effect and mechanism of aniline-fullerene stabilizers on nitrocellulose based on the isothermal thermal decomposition. Polym Degrad Stab 2020. [DOI: 10.1016/j.polymdegradstab.2020.109221] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Tarchoun AF, Trache D, Klapötke TM, Krumm B, Khimeche K, Mezroua A. A promising energetic biopolymer based on azide-functionalized microcrystalline cellulose: Synthesis and characterization. Carbohydr Polym 2020; 249:116820. [PMID: 32933667 DOI: 10.1016/j.carbpol.2020.116820] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2020] [Revised: 07/21/2020] [Accepted: 07/22/2020] [Indexed: 01/10/2023]
Abstract
In the current investigation, azidodeoxy-microcrystalline cellulose nitrate (AMCCN) as a novel promising nitrogen-rich energetic biopolymer was synthesized, and its features were compared to those of azidodeoxy-pristine cellulose nitrate (APCN), conventional cellulose nitrate (PCN) and microcrystalline cellulose nitrate (MCCN). The produced nitrated samples and their precursors were fully characterized using various analytical techniques. In addition, the heats of combustion and mechanical sensitivities of all nitrated biopolymers were evaluated, and their energetic performances were predicted by EXPLO5 V6.04 software. The obtained results provide evidence for the effectiveness of the applied chemical functionalization approach to synthesize the relatively insensitive AMCCN and APCN with nitrogen content of 22.75 % and 22.50 %, density of 1.718 g/cm3 and 1.706 g/cm3, and detonation velocity of 7707 m/s and 7533 m/s, respectively, which are higher than those of PCN. This work opens avenues to design promising energetic biopolymers based on renewable microcrystalline cellulose for potential application in advanced high performance solid propellants and explosives.
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Affiliation(s)
- Ahmed Fouzi Tarchoun
- UER Procédés Energétiques, Ecole Militaire Polytechnique, BP 17, Bordj El-Bahri, 16046, Algiers, Algeria; Department of Chemistry, Ludwig Maximilian University Butenandtstrasse 5-13 (D), D-81377, Munich, Germany.
| | - Djalal Trache
- UER Procédés Energétiques, Ecole Militaire Polytechnique, BP 17, Bordj El-Bahri, 16046, Algiers, Algeria.
| | - Thomas M Klapötke
- Department of Chemistry, Ludwig Maximilian University Butenandtstrasse 5-13 (D), D-81377, Munich, Germany.
| | - Burkhard Krumm
- Department of Chemistry, Ludwig Maximilian University Butenandtstrasse 5-13 (D), D-81377, Munich, Germany
| | - Kamel Khimeche
- UER Procédés Energétiques, Ecole Militaire Polytechnique, BP 17, Bordj El-Bahri, 16046, Algiers, Algeria
| | - Abderrahmane Mezroua
- UER Procédés Energétiques, Ecole Militaire Polytechnique, BP 17, Bordj El-Bahri, 16046, Algiers, Algeria
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Guo W, Li C, Du P, Wang Y, Zhao S, Wang J, Yang C. Thermal properties of drug polymorphs: A case study with felodipine form I and form IV. JOURNAL OF SAUDI CHEMICAL SOCIETY 2020. [DOI: 10.1016/j.jscs.2020.04.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Benhammada A, Trache D, Kesraoui M, Chelouche S. Hydrothermal Synthesis of Hematite Nanoparticles Decorated on Carbon Mesospheres and Their Synergetic Action on the Thermal Decomposition of Nitrocellulose. NANOMATERIALS 2020; 10:nano10050968. [PMID: 32443603 PMCID: PMC7711595 DOI: 10.3390/nano10050968] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/27/2020] [Revised: 04/17/2020] [Accepted: 04/24/2020] [Indexed: 01/12/2023]
Abstract
In this study, carbon mesospheres (CMS) and iron oxide nanoparticles decorated on carbon mesospheres (Fe2O3-CMS) were effectively synthesized by a direct and simple hydrothermal approach. α-Fe2O3 nanoparticles have been successfully dispersed in situ on a CMS surface. The nanoparticles obtained have been characterized by employing different analytical techniques encompassing Fourier transform infrared (FTIR) spectroscopy, Raman spectroscopy, X-ray diffraction (XRD) and scanning electron microscopy (SEM). The produced carbon mesospheres, mostly spherical in shape, exhibited an average size of 334.5 nm, whereas that of Fe2O3 supported on CMS is at around 80 nm. The catalytic effect of the nanocatalyst on the thermal behavior of cellulose nitrate (NC) was investigated by utilizing differential scanning calorimetry (DSC). The determination of kinetic parameters has been carried out using four isoconversional kinetic methods based on DSC data obtained at various heating rates. It is demonstrated that Fe2O3-CMS have a minor influence on the decomposition temperature of NC, while a noticeable diminution of the activation energy is acquired. In contrast, pure CMS have a slight stabilizing effect with an increase of apparent activation energy. Furthermore, the decomposition reaction mechanism of NC is affected by the introduction of the nano-catalyst. Lastly, we can infer that Fe2O3-CMS may be securely employed as an effective catalyst for the thermal decomposition of NC.
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Affiliation(s)
- Abdenacer Benhammada
- UER Procédés Energétiques, Ecole Militaire Polytechnique, BP 17, Bordj El-Bahri, Algiers 16046, Algeria; (A.B.); (M.K.); (S.C.)
- Ecole Nationale Préparatoire Aux Etudes d’Ingénieur Badji Mokhtar, ENPEI, BP 5, Rouiba, Algiers 16013, Algeria
| | - Djalal Trache
- UER Procédés Energétiques, Ecole Militaire Polytechnique, BP 17, Bordj El-Bahri, Algiers 16046, Algeria; (A.B.); (M.K.); (S.C.)
- Correspondence:
| | - Mohamed Kesraoui
- UER Procédés Energétiques, Ecole Militaire Polytechnique, BP 17, Bordj El-Bahri, Algiers 16046, Algeria; (A.B.); (M.K.); (S.C.)
| | - Salim Chelouche
- UER Procédés Energétiques, Ecole Militaire Polytechnique, BP 17, Bordj El-Bahri, Algiers 16046, Algeria; (A.B.); (M.K.); (S.C.)
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Bessa W, Trache D, Derradji M, Tarchoun AF. Non‐Isothermal Curing Kinetics of Alkali‐Treated Alfa Fibers/Polybenzoxazine Composites Using Differential Scanning Calorimetry. ChemistrySelect 2020. [DOI: 10.1002/slct.202000596] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Wissam Bessa
- UER Procédés EnergétiquesEcole Militaire Polytechnique BP 17 Bordj El-Bahri 16046 Algiers Algeria
| | - Djalal Trache
- UER Procédés EnergétiquesEcole Militaire Polytechnique BP 17 Bordj El-Bahri 16046 Algiers Algeria
| | - Mehdi Derradji
- UER Procédés EnergétiquesEcole Militaire Polytechnique BP 17 Bordj El-Bahri 16046 Algiers Algeria
| | - Ahmed F. Tarchoun
- UER Procédés EnergétiquesEcole Militaire Polytechnique BP 17 Bordj El-Bahri 16046 Algiers Algeria
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Trache D, Tarchoun AF, Derradji M, Hamidon TS, Masruchin N, Brosse N, Hussin MH. Nanocellulose: From Fundamentals to Advanced Applications. Front Chem 2020; 8:392. [PMID: 32435633 PMCID: PMC7218176 DOI: 10.3389/fchem.2020.00392] [Citation(s) in RCA: 273] [Impact Index Per Article: 68.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2020] [Accepted: 04/15/2020] [Indexed: 12/14/2022] Open
Abstract
Over the past few years, nanocellulose (NC), cellulose in the form of nanostructures, has been proved to be one of the most prominent green materials of modern times. NC materials have gained growing interests owing to their attractive and excellent characteristics such as abundance, high aspect ratio, better mechanical properties, renewability, and biocompatibility. The abundant hydroxyl functional groups allow a wide range of functionalizations via chemical reactions, leading to developing various materials with tunable features. In this review, recent advances in the preparation, modification, and emerging application of nanocellulose, especially cellulose nanocrystals (CNCs), are described and discussed based on the analysis of the latest investigations (particularly for the reports of the past 3 years). We start with a concise background of cellulose, its structural organization as well as the nomenclature of cellulose nanomaterials for beginners in this field. Then, different experimental procedures for the production of nanocelluloses, their properties, and functionalization approaches were elaborated. Furthermore, a number of recent and emerging uses of nanocellulose in nanocomposites, Pickering emulsifiers, wood adhesives, wastewater treatment, as well as in new evolving biomedical applications are presented. Finally, the challenges and opportunities of NC-based emerging materials are discussed.
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Affiliation(s)
- Djalal Trache
- UER Procédés Energétiques, Ecole Militaire Polytechnique, Bordj El-Bahri, Algeria
| | - Ahmed Fouzi Tarchoun
- UER Procédés Energétiques, Ecole Militaire Polytechnique, Bordj El-Bahri, Algeria
| | - Mehdi Derradji
- UER Procédés Energétiques, Ecole Militaire Polytechnique, Bordj El-Bahri, Algeria
| | - Tuan Sherwyn Hamidon
- Materials Technology Research Group, School of Chemical Sciences, Universiti Sains Malaysia, Penang, Malaysia
| | - Nanang Masruchin
- Research Center for Biomaterials, Indonesian Institute of Sciences (LIPI), Jakarta, Indonesia
| | - Nicolas Brosse
- Laboratoire d'Etude et de Recherche sur le MAtériau Bois (LERMAB), Faculté des Sciences et Techniques, Université de Lorraine, Vandœuvre-lès-Nancy, France
| | - M. Hazwan Hussin
- Materials Technology Research Group, School of Chemical Sciences, Universiti Sains Malaysia, Penang, Malaysia
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Yao E, Zhao N, Qin Z, Ma H, Li H, Xu S, An T, Yi J, Zhao F. Thermal Decomposition Behavior and Thermal Safety of Nitrocellulose with Different Shape CuO and Al/CuONanothermites. NANOMATERIALS (BASEL, SWITZERLAND) 2020; 10:E725. [PMID: 32290513 PMCID: PMC7221980 DOI: 10.3390/nano10040725] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/15/2020] [Revised: 04/05/2020] [Accepted: 04/07/2020] [Indexed: 11/18/2022]
Abstract
Bamboo leaf-like CuO(b) and flaky-shaped CuO(f) were prepared by the hydrothermal method, and then combined with Al nanoparticles to form Al/CuO(b) and Al/CuO(f) by the ultrasonic dispersion method. The phase, composition, morphology, and structure of the composites were characterized by X-ray powder diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), and energy scattering spectrometer (EDS). The compatibility of CuO, Al/CuO and nitrocellulose (NC) was evaluated by differential scanning calorimetry (DSC). The effects of CuO and Al/CuO on the thermal decomposition of NC were also studied. The results show that the thermal decomposition reactions of CuO-NC composite, Al/CuO-NC composite, and NC follow the same kinetic mechanism of Avrami-Erofeev equation. In the cases of CuO and Al/CuO, they could promote the O-NO2 bond cleavage and secondary autocatalytic reaction in condensed phase. The effects of these catalysts have some difference in modifying the thermolysis process of NC due to the microstructures of CuO and the addition of Al nanopowders. Furthermore, the presence of Al/CuO(f) can make the Al/CuO(f)-NC composite easier to ignite, whereas the composites have strong resistance to high temperature. Compatibility and thermal safety analysis showed that the Al/CuO had good compatibility with NC and it could be used safely. This contribution suggests that CuO and Al/CuO played key roles in accelerating the thermal decomposition of NC.
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Affiliation(s)
- Ergang Yao
- Science and Technology on Combustion and Explosion Laboratory, Xi′an Modern Chemistry Research Institute, Xi′an 710065, China; (E.Y.); (Z.Q.); (H.L.); (S.X.); (T.A.); (J.Y.)
| | - Ningning Zhao
- School of Science, Xi’an University of Technology, Xi’an 710054, China
| | - Zhao Qin
- Science and Technology on Combustion and Explosion Laboratory, Xi′an Modern Chemistry Research Institute, Xi′an 710065, China; (E.Y.); (Z.Q.); (H.L.); (S.X.); (T.A.); (J.Y.)
| | - Haixia Ma
- School of Chemical Engineering, Northwest University, Xi’an 710069, China;
| | - Haijian Li
- Science and Technology on Combustion and Explosion Laboratory, Xi′an Modern Chemistry Research Institute, Xi′an 710065, China; (E.Y.); (Z.Q.); (H.L.); (S.X.); (T.A.); (J.Y.)
| | - Siyu Xu
- Science and Technology on Combustion and Explosion Laboratory, Xi′an Modern Chemistry Research Institute, Xi′an 710065, China; (E.Y.); (Z.Q.); (H.L.); (S.X.); (T.A.); (J.Y.)
| | - Ting An
- Science and Technology on Combustion and Explosion Laboratory, Xi′an Modern Chemistry Research Institute, Xi′an 710065, China; (E.Y.); (Z.Q.); (H.L.); (S.X.); (T.A.); (J.Y.)
| | - Jianhua Yi
- Science and Technology on Combustion and Explosion Laboratory, Xi′an Modern Chemistry Research Institute, Xi′an 710065, China; (E.Y.); (Z.Q.); (H.L.); (S.X.); (T.A.); (J.Y.)
| | - Fengqi Zhao
- Science and Technology on Combustion and Explosion Laboratory, Xi′an Modern Chemistry Research Institute, Xi′an 710065, China; (E.Y.); (Z.Q.); (H.L.); (S.X.); (T.A.); (J.Y.)
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Characterization of microcrystalline cellulose extracted from olive fiber. Int J Biol Macromol 2020; 156:347-353. [PMID: 32278601 DOI: 10.1016/j.ijbiomac.2020.04.015] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2020] [Revised: 04/02/2020] [Accepted: 04/05/2020] [Indexed: 11/21/2022]
Abstract
Olive fiber is a renewable natural fiber which has potential as an alternative biomass for extraction of microcrystalline cellulose (MCC). MCC has been widely applied in various industries owing to its small dimensional size for ease of reactive fabrication process. At present study, a serial treatments of bleaching, alkaline and acid hydrolysis was employed to extract OL-BLF, OL-PUF, and OL-MCC respectively from olive stem fiber. In morphology examination, a feature of short micro-crystallite particles was obtained for OL-MCC. The particle size was found gradually reducing from OL-PUF (305.31 μm) to OL-MCC (156.06 μm) due to the disintegration of cellulose fibrils. From physicochemical analysis, most lignin and hemicellulose components had been removed from OL-BLF to form OL-PUF with individually fibril structure. The elemental analysis revealed that highly pure cellulose component was obtained for OL-MCC. Also, the rigidity had been improved from OL-BLF to OL-PUF, while with the highest for OL-MCC with 74.2% crystallinity, endowing it as a reliable load-bearing agent. As for thermal analysis, OL-MCC had the most stable heat resistance in among the chemically-treated fibers. Therefore, olive MCC could act as a promising reinforcing agent to withstand harsh conditions for variety fields of composite applications.
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Li G, Jin B, Chai Z, Ding L, Chu S, Peng R. Synthesis and crystal characterization of novel fulleropyrrolidines and their potential application as nitrocellulose-based propellants stabilizer. Polym Degrad Stab 2020. [DOI: 10.1016/j.polymdegradstab.2019.109061] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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