A Promising Energetic Polymer from Posidonia oceanica Brown Algae: Synthesis, Characterization, and Kinetic Modeling

Macromolecular Chemistry and Physics, Год журнала: 2019, Номер 220(22)

Опубликована: Окт. 21, 2019

Abstract In this study, microcrystalline cellulose nitrate (MCCN) as energetic polymer is successfully obtained from Posidonia oceanica brown algae (POBA). Fourier transform infrared spectroscopy (FTIR) results show alterations in the intensities of some absorption bands, suggesting a significant difference chemical structure between and emergent MCCN samples. X‐ray diffraction (XRD) measurements indicate that MCCNs are more crystalline than conventional nitrocellulose (NC). According to scanning electron microscopy (SEM), both NC reveal compact rough surface. Differential calorimetry (DSC) displays thermal degradation shifts lower temperatures compared respective NCs. Furthermore, comparison with samples, samples exhibit high density, nitrogen content, low viscosity‐average molecular weight, good stability. On other hand, kinetic modeling based on DSC data carried out by isoconversional integral methods determine Arrhenius parameters decomposition mechanisms. It found present activation energies NCs decrease ≈6%. Finally, work opens new pathway prepare POBA, it expected have applications several areas such propellants, binders, gas generators.

Язык: Английский

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Experimental and theoretical study on thermal kinetics and reactive mechanism of nitrocellulose pyrolysis by traditional multi kinetics and modeling reconstruction

Journal of Hazardous Materials, Год журнала: 2019, Номер 386, С. 121645 - 121645

Опубликована: Ноя. 9, 2019

Язык: Английский

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Tetrazole-functionalized microcrystalline cellulose: A promising biopolymer for advanced energetic materials

Chemical Engineering Journal, Год журнала: 2020, Номер 400, С. 125960 - 125960

Опубликована: Июнь 20, 2020

Язык: Английский

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Effects of nitrogen content on pyrolysis behavior of nitrocellulose

Fuel, Год журнала: 2019, Номер 264, С. 116853 - 116853

Опубликована: Дек. 13, 2019

Язык: Английский

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Effect of stabilizers and nitrogen content on thermal properties of nitrocellulose granules

Journal of Thermal Analysis and Calorimetry, Год журнала: 2020, Номер 143(5), С. 3459 - 3470

Опубликована: Янв. 20, 2020

Abstract The granules containing nitrogen of various content (12.2–13.3%) and stabilizers (centralite I, centralite II, akardite triphenylamine) were obtained in laboratory scale, the study their physicochemical thermal properties was conducted. It has been observed that helium density depends on degree gelling nitrocellulose by stabilizer as well lack effect type heat combustion value. In turn, nitrocellulose. Granules 13.3% N characterized a more rapidly developing decomposition than 12.2 12.9% maximum temperature shifts toward higher temperatures (from 207.6 to 209.8 °C) with decreasing for triphenylamine stabilizer. All values generation rate lower respective rates I. Thermal chemical stability have better properties, when compared other examined stabilizers. On basis differential scanning calorimetry thermogravimetry, kinetic parameters calculated means Ozawa–Flynn–Wall analysis. determined. model adjusted—the best fit n th-order reaction autocatalysis. activation energy process according adopted increases from 190 239 kJ mol −1 increasing granulate.

Язык: Английский

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Thermal kinetics and reactive mechanism of cellulose nitrate decomposition by traditional multi kinetics and modeling calculation under isothermal and non-isothermal conditions

Industrial Crops and Products, Год журнала: 2020, Номер 145, С. 112085 - 112085

Опубликована: Янв. 9, 2020

Язык: Английский

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Organosolv lignins as new stabilizers for cellulose nitrate: Thermal behavior and stability assessment

International Journal of Biological Macromolecules, Год журнала: 2020, Номер 164, С. 794 - 807

Опубликована: Июль 11, 2020

Язык: Английский

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Design and characterization of new advanced energetic biopolymers based on surface functionalized cellulosic materials

Cellulose, Год журнала: 2021, Номер 28(10), С. 6107 - 6123

Опубликована: Май 24, 2021

Язык: Английский

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New insensitive high-energy dense biopolymers from giant reed cellulosic fibers: their synthesis, characterization, and non-isothermal decomposition kinetics

New Journal of Chemistry, Год журнала: 2021, Номер 45(11), С. 5099 - 5113

Опубликована: Янв. 1, 2021

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 microcrystals.

Язык: Английский

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Production of nanocellulose from miscanthus biomass

Current Research in Green and Sustainable Chemistry, Год журнала: 2024, Номер 8, С. 100412 - 100412

Опубликована: Янв. 1, 2024

Nanocellulose materials are distinguished by their safety, biodegradability, and adaptability. It was shown that bacterial nanocellulose does not contain lignin hemicellulose has an ultrafine network structure. The wide compatibility of such with biological molecules the ability to change structure makes a promising material for medical applications. Today, in production nanocellulose, mainly softwood is used. Despite obvious advantages limiting factor high cost wood raw environmental damage caused deforestation. Therefore, there increasing interest cheap annually renewable herbaceous plant biomass, which potential negative synthesis nanocellulose. This review aimed evaluate viability using Miscanthus genus as primary source characteristics various types methods preparation from miscanthus discussed. plants disease resistant, frost grow rapidly. biomass growth this reaches 35 tons per hectare, life span 20 years. crystals because it rich cellulose. development effective obtaining will allow introduction new class biotechnical composite liquid solid compositions, well food, medical, pharmaceutical industries.

Язык: Английский

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