Article
Materials Science, Paper & Wood
Ling Chen, Fengqiang Nan, Qiang Li, Jianwei Zhang, Guorui Jin, Moru Wang, Xiang Cao, Jie Liu, Weidong He
Summary: In this study, a novel NBC/RDX nanocomposite energetic material with a unique and stable three-dimensional porous network nanostructure was prepared using a sol-gel method and freeze-drying technology. The material exhibited improved thermal properties, decomposition kinetics, and desensitization effect compared to raw RDX and NBC. The study also proposed three reduction sensitivity mechanisms for the material.
Article
Thermodynamics
Xiao-Qiao Zhao, Wen-Qian Wu, Hua-bo Li, Wang-Hua Chen, Zi-Chao Guo, Li-Ping Chen
Summary: Adiabatic calorimetry is a key experimental method for studying thermal hazards in chemical processes, but faces challenges in identifying reaction models and maintaining system equilibrium under rapid temperature rise rates. This study introduces the heat-quench-heat method to address these issues and accurately evaluate kinetic parameters.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Engineering, Environmental
Huiming Sun, Song Guo, Sining Chen, Min Jia, Shuyi Shen
Summary: In this work, elevated thermal and isothermal experiments of azobenzene were conducted using SENSYS Evolution DSC. Kinetic parameters and decomposition mechanism were determined using Kinetic Calculation (KC) method and Molecular Dynamics Simulation (MDS) method. The results demonstrate that azobenzene exhibits a distinct first endothermic and subsequent exothermic behavior during thermal decomposition. The apparent activation energy remains relatively constant in the range of 0.1 <_ alpha <_ 0.4 and gradually decreases as the reaction proceeds. The thermal decomposition behavior of azobenzene can be described by the Sestak-Berggren mechanism. At the initial stage, the decomposition process is controlled by the lack of sufficient free radicals, while at the autocatalytic stage, it is governed by the exponential growth of free radicals. Based on the Semenov model, the self-accelerating decomposition temperature (SADT) of azobenzene is calculated to be 380.5 degrees Celsius when packed in a 25 kg standard package.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2022)
Article
Chemistry, Physical
Kavitha Sharanappa Gudadur, Pandiyarasan Veluswamy
Summary: A flexible polymer nano-composite thin film patch with excellent energy storage and temperature indication properties was fabricated. Conductive silver nanoparticles (Ag NPs) were used as functional fillers and polyvinyl alcohol (PVA) was used as the polymer material. The effects of Ag NPs concentration on morphology and temperature indication were investigated, and the results showed uniform distribution of Ag in the matrix membranes. The nanocomposite patch exhibited improved mechanical properties, conductivity, and a semi-crystalline nature. It has the potential to enhance performance in terms of mechanical, thermal, and antibacterial qualities without treatment, making it promising for use in energy storage, thermal management, and wearable temperature sensors in the future.
SURFACES AND INTERFACES
(2023)
Article
Thermodynamics
Azhar Abbas Khosa, J. Yan, C. Y. Zhao
Summary: This study introduces ZnO as a new doping material for the CaCO3/CaO TCES system, showing the optimization of system performance by adjusting ZnO loading, presenting the reaction kinetics of doped and undoped systems in the decarbonation step, as well as the energy storage capacity and cyclic stability of the system.
Article
Chemistry, Analytical
Zhuqing Fang, Shukui Li, Jiping Liu, Chuang Yu, Dongsen Zheng, Meizhuang Qiao
Summary: This study investigates the influence of lithium aluminium hydride (LiAlH4) on the decomposition process of cyclotrimethylenetrinitramine (RDX). The results show that LiAlH4 significantly decreases the decomposition temperature of RDX and alters its decomposition pattern.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2022)
Article
Chemistry, Physical
Michael R. Zachariah, Prithwish Biswas, Yujie Wang, Steven Herrera, Pankaj Ghildiyal
Summary: Incorporating ammonia borane (NH3BH3/AB) into polymer matrices with carbonyl functional groups can facilitate its decomposition into ammonia and borane gases, preventing its thermochemical oligomerization. This chemical pathway allows for the controlled release of reactive fuels for high-energy applications.
CHEMISTRY OF MATERIALS
(2023)
Article
Thermodynamics
Jianwei Zhang, Ling Chen, Jing Yang, Chengming Bian, Weidong He
Summary: Recently, the thermal decomposition behavior of TATOT, a fused rings compound, was systematically studied using various methods such as TG, DSC, TG-DSC-FTIR-MS, ARC, SEM, FTIR, and XPS. The results revealed a ring-opening reaction as the starting point of TATOT pyrolysis. Detailed mechanism and kinetic models for both stages of TATOT pyrolysis were proposed. Safety indicators for TATOT, such as TD24 and TD8, were calculated to be 182.71°C and 186.32°C, respectively.
THERMOCHIMICA ACTA
(2023)
Article
Environmental Sciences
Guang Sun, Gang Zhang, Jingyong Liu, Deniz Eren Evrendilek, Musa Buyukada
Summary: The study focused on characterizing the combustion mechanisms and properties of spent potlining (SPL) from the aluminum industry, aiming to enhance circular waste utilization. The findings suggested an optimal temperature and heating rate combination for joint optimization, while also identifying the formation of substantial NaF and CaF2 in the residual ash. The research contributes to turning SPL waste into a benign input for circular waste utilization.
JOURNAL OF ENVIRONMENTAL SCIENCES
(2021)
Article
Nuclear Science & Technology
David L. Y. Louie, Yifeng Wang, Rekha Rao, Alec Kucala, Jessica Kruichak
Summary: To mitigate the adverse effects of molten corium after a reactor pressure vessel failure, new reactor designs incorporate a core catcher and sacrificial material to stabilize the corium. Existing reactors can be modified to allow injectable cooling materials. A novel granular carbonate mineral is proposed as a sacrificial material, which can quickly solidify the corium through thermal decomposition reaction.
NUCLEAR ENGINEERING AND DESIGN
(2022)
Article
Chemistry, Physical
Ruixiang He, Kezhi Li, Longqi Liu
Summary: The ablation resistance of plasma-sprayed NbC-modified ZrC coatings was tested with an oxyacetylene flame. The phase composition of the heat-treated ZrO2-Nb2O5 plates was determined. The results showed that the ZrC-20 mol% NbC coating had the best ablation property, forming a dense oxide layer and a composite film of ZrO2 crystals.
APPLIED SURFACE SCIENCE
(2023)
Article
Thermodynamics
E. A. Kammar, E. A. M. Gad, M. A. Mousa
Summary: NixCo1-xFe2O4 spinel nanoparticles were prepared using different methods and showed catalytic activity in the thermal decomposition of ammonium perchlorate, with NiCoF-gl exhibiting the highest catalytic activity. The addition of nanosized ferrites decreased the decomposition temperatures of AP.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Review
Thermodynamics
Sudhir Kumar Pathak, Rajat Kumar, Varun Goel, A. K. Pandey, V. V. Tyagi
Summary: This study summarizes the recent advancements in the thermal performance of nanofluid-charged heat pipes used for various thermal management applications. It discusses the preparation, characterization, and stability enhancement methods of nanofluids. The study found that a porous coating on the wick surface contributes to a decrease in thermal resistance, and nanofluid-charged heat pipes perform best at a filling ratio of 50-70%. The heat transfer coefficient of heat pipes increases by 20-25% with nanofluids compared to distilled water. The higher thermal conductivity and increased nucleation sites of nanofluids improve the thermal efficiency of heat pipes.
APPLIED THERMAL ENGINEERING
(2022)
Article
Chemistry, Analytical
Yiying Zhang, Lianjie Zhai, Cheng Xu, Pei Chang, Kangzhen Xu, Bozhou Wang, Yanan Li
Summary: DTNBDNP and DDNBDNP are newly developed heat-resistant explosives with high thermal decomposition temperature and superior properties. The thermal behaviors and nonisothermal decomposition kinetics were investigated using DSC, and the thermal safety was evaluated by different criteria. Further studies found that the decompositions of DTNBDNP and DDNBDNP mainly start with a ring-opening reaction and release NO, CO2, N2O, and NO2 as the main gaseous products.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2023)
Article
Food Science & Technology
Zhenjun Liu, Xu Ren, Yongqiang Cheng, Guohua Zhao, Yun Zhou
Summary: This review summarizes recent progress in understanding the gelation mechanism of Konjac glucomannan (KGM), focusing on experimental techniques, differences in gel preparation routes, and the morphological/structural features and intermolecular interactions during the gelation process. Despite insights provided, further research is needed to explore the mechanisms of alkali and heat-treatment induced intermolecular associations.
TRENDS IN FOOD SCIENCE & TECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Ling Chen, Yingbo Wang, You Fu, Jie Liu, Wei-dong He
Article
Chemistry, Multidisciplinary
Ling Chen, Weidong He, Jie Liu
Article
Materials Science, Multidisciplinary
Ling Chen, Yang Qin, Xinfu Cao, Jianbing Gao, Shishuo Liu, Yang Zhang, Jing Tu, Yingbo Wang, Jie Liu, Weidong He
Summary: A novel nitrated bacterial cellulose/nanoenergetic composite was successfully prepared using sol-gel and freeze-drying technologies. The composite showed a unique porous structure and demonstrated promising thermal decomposition and safety performance.
MATERIALS TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Ling Chen, Xinfu Cao, Yong Chen, Qiang Li, Yingbo Wang, Xijin Wang, Yang Qin, Xiang Cao, Jie Liu, Ziqiang Shao, Weidong He
Summary: This study examined the use of cellulose nanofibers as coating materials for energetic crystals, revealing enhanced dispersibility and improved interfacial contact ability between CNFs and energetic crystals, leading to outstanding thermal stability and sensitivity performances of the core-shell structure composites. The results demonstrate a potential fabrication strategy for decorating high-explosive crystals by uniformly coating CNFs on their surface.
Article
Chemistry, Multidisciplinary
Ling Chen, Qiang Li, Shishuo Liu, Yiying Bei, Yajun Ding, Jie Liu, Weidong He
Summary: This study successfully prepared core-shell structured energetic composites using PDA self-polymerization technology, inspired by the composition of attachment proteins in mussels, to improve the thermal stability and safety of energetic crystals while reducing their sensitivity to impact. The results demonstrate that the heat resistance of the PDA layer significantly increases the thermal decomposition temperature of energetic crystals.
ADVANCED MATERIALS INTERFACES
(2021)
Article
Materials Science, Composites
Ling Chen, Xiangdong Mao, Qiang Li, Xiang Cao, Jianwei Zhang, Yingbo Wang, Jie Liu, Weidong He
Summary: This study utilizes a novel thermoplastic cellulose-based energetic binder, NGEC, to prepare energetic composites with improved thermal properties and reduced sensitivity. The results demonstrate that NGEC combined with energetic crystals tightly by van der Waals force, providing promising applications in high-energy and high-strength propellants.
COMPOSITES COMMUNICATIONS
(2021)
Article
Engineering, Environmental
Ling Chen, Qiang Li, Xijin Wang, Jianwei Zhang, Guozhen Xu, Xiang Cao, Jie Liu, Fengqiang Nan, Weidong He
Summary: In this paper, a novel nanocomposite energetic material RDX@NGEC was successfully synthesized using electrostatic spraying technology, and its thermal decomposition properties and sensitivity were systematically investigated. The results showed that NGEC was uniformly coated on the surface of RDX, resulting in a significant reduction in particle size and sensitivity. Therefore, this novel nanocomposite energetic material holds potential applications in propellants and explosives.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Materials Science, Paper & Wood
Ling Chen, Fengqiang Nan, Qiang Li, Jianwei Zhang, Guorui Jin, Moru Wang, Xiang Cao, Jie Liu, Weidong He
Summary: In this study, a novel NBC/RDX nanocomposite energetic material with a unique and stable three-dimensional porous network nanostructure was prepared using a sol-gel method and freeze-drying technology. The material exhibited improved thermal properties, decomposition kinetics, and desensitization effect compared to raw RDX and NBC. The study also proposed three reduction sensitivity mechanisms for the material.
Article
Thermodynamics
Jianwei Zhang, Ling Chen, Jing Yang, Chengming Bian, Weidong He
Summary: Recently, the thermal decomposition behavior of TATOT, a fused rings compound, was systematically studied using various methods such as TG, DSC, TG-DSC-FTIR-MS, ARC, SEM, FTIR, and XPS. The results revealed a ring-opening reaction as the starting point of TATOT pyrolysis. Detailed mechanism and kinetic models for both stages of TATOT pyrolysis were proposed. Safety indicators for TATOT, such as TD24 and TD8, were calculated to be 182.71°C and 186.32°C, respectively.
THERMOCHIMICA ACTA
(2023)
Article
Thermodynamics
Yongchen Zhu, Jianwei Zhang, Weidong He
Summary: This study investigates the interaction mechanism between 5-amino-1H-tetrazole and nitrocellulose using kinetic methods and thermal analysis. The results show that the addition of 5-amino-1H-tetrazole affects the pyrolysis process of nitrocellulose and leads to the formation of incomplete oxidation products.
THERMOCHIMICA ACTA
(2023)
Article
Materials Science, Multidisciplinary
Ling Chen, Binbin Wang, Jianwei Zhang, Derong Meng, Fengqiang Nan, Ping Du, Xin Liao, Weidong He
Summary: This study compares the structures of nitrocellulose and two new binders and finds that nitrated bacterial cellulose and nitrate glycerol ether cellulose have advantages in thermal stability and activation energy. Under high-pressure and adiabatic conditions, the new binders also show higher thermal stability and gas production performance.
ACS APPLIED POLYMER MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Ling Chen, Xinfu Cao, Jianbing Gao, Weidong He, Jie Liu, Yingbo Wang, Xiang Zhou, Jinpeng Shen, Binbin Wang, Yao He, Daquan Tan
Summary: In this study, nitrated bacterial cellulose was used to prepare nanocomposite energetic materials through a sol-gel method and freeze-drying technology. The materials exhibited reduced peak temperature and substantial heat release during decomposition. The research also explored the mechanism of thermal decomposition and suggested the presence of cyclic catalytic decomposition between the gel matrix and explosives.
ACS APPLIED NANO MATERIALS
(2021)
