Article
Engineering, Manufacturing
Levi Kirby, Adam Lawrence, H. S. Udaykumar, Travis Sippel, Xuan Song
Summary: This study introduces the use of a pressure-assisted binder jetting (PBJ) additive manufacturing process to fabricate solid propellant materials. The PBJ process shows great promise in producing highly resolute propellants with high solids loading, sufficient density, and sufficient mechanical properties. It can also be used to print solid propellants with complex grain geometries and changeable burn rates.
ADDITIVE MANUFACTURING
(2023)
Article
Engineering, Environmental
Sohan Lal, Richard J. Staples, Jean'ne M. Shreeve
Summary: A variety of amine derivatives have been found to react with FOX-7, resulting in the formation of triazine derivatives that can be nitrated to produce rearranged nitramines in high yields. The structures of these compounds were determined using spectroscopic techniques, elemental analyses, and single crystal X-ray analysis. The synthesized compounds exhibited good thermal stabilities and were found to have excellent energetic properties, making them suitable candidates for solid rocket propulsion.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Applied
Sabri Touidjine, Karim Moulai Boulkadid, Djalal Trache, Samir Belkhiri, Abderrahmane Mezroua
Summary: This study focuses on the performance of composite propellants using a mixture of polyurethane and nitrocellulose as binders. The materials were characterized and studied through FTIR, XRD, and DSC, with Arrhenius parameters calculated. The theoretical performances of the composite propellant were simulated using NASA Lewis Code and CEA.
PROPELLANTS EXPLOSIVES PYROTECHNICS
(2022)
Article
Chemistry, Applied
Sarah A. Bentil, William J. Jackson, Christopher Williams, Timothy C. Miller
Summary: Inert solid rocket propellant samples were experimentally tested for their viscoelastic response at high strain rates using dynamic inflation experiments. Digital image correlation and inverse finite element analysis were employed to characterize and calibrate the propellant's behavior, providing insight into the material's response to shock wave exposure.
PROPELLANTS EXPLOSIVES PYROTECHNICS
(2022)
Review
Chemistry, Multidisciplinary
Weiqiang Pang, Yang Li, Luigi T. DeLuca, Daolun Liang, Zhao Qin, Xiaogang Liu, Huixiang Xu, Xuezhong Fan
Summary: This study analyzed the effects of nano-sized metal particles on the properties of solid rocket propellants, finding that these additives can increase burning rate while also promoting higher impact sensitivity and friction sensitivity compared to micro-sized particles.
Article
Engineering, Multidisciplinary
Sabri Touidjine, Moulai Karim Boulkadid, Djalal Trache, Samir Belkhiri, Abderrahmane Mezroua, Mohamed Islam Aleg, Afaf Belkebiche
Summary: Improving the performance of solid composite propellants (SCPs) with ammonium nitrate (AN) as an oxidizer can be achieved by incorporating energetic ingredients such as explosives, energetic binders, or catalysts. In this study, polyurethane (PU) was mixed with nitrocellulose (NC) as an energetic polymer to enhance the performance of AN-based composite solid propellants. The experimental results showed that increasing the NC content catalyzed the thermal decomposition of the propellant, leading to improved performance.
DEFENCE TECHNOLOGY
(2022)
Article
Polymer Science
Chen Shen, Shi Yan, Yapeng Ou, Qingjie Jiao
Summary: In this study, fluorinated polyurethane (FPU) was prepared and its structure and mechanical properties were characterized. It was found that FPU can enhance the oxidation of Al and produce smaller agglomerates in the combustion process.
Article
Engineering, Aerospace
Igor G. Assovskiy, Genadiy P. Kuznetsov, Georgiy Melik-Gaikazov
Summary: The new results of experimental and theoretical research focus on the ignition and combustion of environmentally safe water compositions used as propellants in rocket engines. The study evaluates the thermodynamic effect of water additives to fuels and explores the temperature regimes of ignition and combustion of different energetic materials in various environmental conditions. Additionally, a theoretical model for burning droplets of aqueous solutions, suspensions, and emulsions is developed based on experimental data.
Article
Engineering, Aerospace
Xue-Li Liu, Song-Qi Hu, Lin-Lin Liu, Yan Zhang
Summary: This study collected condensed combustion products (CCPs) of hydroxyl-terminated polybutadiene/ammonium perchlorate/aluminum propellants and characterized their microscopic morphologies, particle size distributions, and chemical compositions. The results showed that CCPs exhibited a bimodal distribution and decreasing the size of aluminum particles improved the combustion efficiency. Additionally, higher pressures were found to result in higher combustion efficiencies and smaller agglomeration sizes.
Article
Chemistry, Physical
Traian Rotariu, Bogdan-Gheorghe Pulpea, Florin-Marian Dirloman, Aurel Diacon, Edina Rusen, Gabriela Toader, Neculai-Daniel Zvincu, Tanta-Verona Iordache, Rizvan Horia Botis
Summary: This study developed a high-performance and eco-friendly rocket propellant by synthesizing and combining novel compositions, addressing the polymorphism concerns of ammonium nitrate. Recycled PET glycolysis was utilized to produce polyester-polyol blends as binders, allowing for adjustment of the energetic output and mechanical properties of the propellant. The performance and safety characteristics of these new composites were evaluated through various analytical techniques and tests.
Article
Thermodynamics
Andrew W. Marsh, Gwendolyn T. Wang, Jeffery D. Heyborne, Daniel R. Guildenbecher, Yi Chen Mazumdar
Summary: The study combines digital in-line holography and two-color imaging pyrometry to obtain spatially and temporally resolved aluminum agglomerate particle dynamics, capturing the combustion histories for thousands of particles per experiment. Initial results show variation in initial acceleration but similar steady-state velocities among aluminum agglomerates of similar size, with average velocity decreasing as particle size increases. Large agglomerates exhibit a convergence to an average projected temperature of around 2500 K as they move away from the propellant surface.
PROCEEDINGS OF THE COMBUSTION INSTITUTE
(2021)
Article
Chemistry, Applied
Peter J. Wilkinson, Matthew C. Weaver, Guillaume Kister, Philip P. Gill
Summary: This paper reports on the production of two composite propellants made from a commercially-available-polymer as binder using a resonant acoustic mixer slurry process. The propellants exhibited similar theoretical ballistic performance to conventional HTPB-based propellants and showed chemical compatibility between SEBS and the solid fillers. The novel combination of RAM and slurry coating process demonstrated the feasibility of using SEBS polymer as a binder for solid propellants.
PROPELLANTS EXPLOSIVES PYROTECHNICS
(2022)
Article
Polymer Science
Tu Jing, Xu Heng, Xiang Guifeng, Chen Ling, Li Pingyun, Guo Xiaode
Summary: The study prepared a high-efficiency self-healing polyurethane adhesive using polypropylene glycol and isophorone diamine. The experimental results showed that PPG-IP-PA with a continuous ring hard segment structure has excellent mechanical properties and high-efficiency room temperature self-healing ability, providing a new designing concept in dealing with the debonding of components in propellants.
Article
Polymer Science
Islam K. Boshra, Guo Lin, Ahmed Elbeih
Summary: The study investigated the effects of CM based on TMP and BD on the mechanical properties of CSRPs, demonstrating that the addition of CM can significantly enhance the propellant's mechanical properties. Samples with a TMP:BD ratio of 2:1 exhibited the highest strength, while those with a ratio of 1:2 showed the highest strain across all NCO/OH ratios.
HIGH PERFORMANCE POLYMERS
(2021)
Review
Chemistry, Applied
Christopher J. Wright, Peter J. Wilkinson, Sally E. Gaulter, Donald Fossey, Andrew O. Burn, Philip P. Gill
Summary: This study reviews the benefits and limitations of using ResonantAcoustic Mixing (RAM) for future production of rubbery composite rocket propellants. RAM offers advantages such as shorter mixing time, versatility, and ability to mix higher viscosities, but needs testing at larger production scales. RAM production has implications on the product development process, with future research focusing on process and material control.
PROPELLANTS EXPLOSIVES PYROTECHNICS
(2022)
Article
Chemistry, Physical
Hanming Li, Wei Dong, Xinyu Shen, Chengda Ge, Yilong Song, Zisheng Wang, Anran Wang, Ziqi Yang, Mingwei Hao, Yu Zhang, Weitao Zheng, Xiaoyu Zhang, Qingfeng Dong
Summary: By using octylamine as an additive, the stability of CsPbI3 nanocrystal films with excellent optical and electrical properties can be achieved. The octylamine additive enhances the performance and operational stability of LEDs, leading to a significant increase in external quantum efficiency and operational lifetime.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Biotechnology & Applied Microbiology
Qing Dong, Xiuna Jia, Yuling Wang, Hao Wang, Qiong Liu, Dan Li, Jin Wang, Erkang Wang
Summary: Pancreatic cancer is difficult to diagnose in the early stage due to the lack of symptoms. Current diagnosis techniques have limitations in terms of personnel expertise and cost. Therefore, alternative detection methods are highly demanded. In this study, a new strategy combining nanoparticles and amplification reaction was proposed to improve the sensitivity of pancreatic cancer cell detection. The strategy showed good specificity and potential for clinical diagnosis.
JOURNAL OF NANOBIOTECHNOLOGY
(2022)
Article
Chemistry, Physical
Daiyong Chao, Zhixuan Yu, Jinxing Chen, Qing Dong, Weiwei Wu, Youxing Fang, Ling Liu, Shaojun Dong
Summary: Transition metal phosphides, particularly Cu3P and FeP nanoparticles, demonstrate unique enzyme-like activities in mimicking glycoside hydrolase and glucose oxidase, showing great potential for biological catalysis applications.
Article
Chemistry, Physical
Jingwen Chen, Linlin Li, Wenhao Ran, Di Chen, Lili Wang, Guozhen Shen
Summary: This study investigated a novel machine learning-based voice recognition platform using an MXene/MoS2 flexible vibration sensor (FVS) with high sensitivity for acoustic recognition. The performance of the MXene/MoS2 FVS was systematically investigated both theoretically and experimentally, and the developed neural network achieved high speaker recognition accuracy (99.1%).
Article
Agriculture, Multidisciplinary
Lu Chen, Qiandai Shi, Qingfeng Dong, Yu Du, Zhiyun Peng, Qiaohui Zeng, Zihao Lin, Jieer Qiu, Yong Zhao, Jing Jing Wang
Summary: A novel photodynamic inactivation (PDI)-mediated antimicrobial film made of polylactic acid/5-aminolevulinic acid (PLA/ALA) was successfully fabricated using low-temperature plasma. The film displayed enhanced barrier properties and exhibited excellent antibacterial and antibiofilm effects against various pathogens and spoilage bacteria. Moreover, it effectively inhibited bacterial growth and preserved the quality of ready-to-eat salmon, thereby extending its shelf life.
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Daiyong Chao, Qing Dong, Zhixuan Yu, Desheng Qi, Minghua Li, Lili Xu, Ling Liu, Youxing Fang, Shaojun Dong
Summary: This study presents an effective antioxidative system for diabetic chronic wound healing by integrating a metal organic framework (MOF) nanozyme with antioxidant enzyme-like activity with a hydrogel (Gel), which can modulate the oxidative stress microenvironment and transition from the inflammation phase to the proliferation phase, comparable to a widely used clinical drug.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Editorial Material
Optics
Qingfeng Dong, Yanjun Fang
Summary: The MAPbI(3)/epoxy composite was synthesized using a solvothermal method and exhibited excellent radiation shielding performance.
LIGHT-SCIENCE & APPLICATIONS
(2023)
Review
Biochemistry & Molecular Biology
Yu Chen, Yong Liu, Qingfeng Dong, Shanggui Deng, Changhua Xu, Yongfeng Kang, Min Fan, Li Li
Summary: This review analyzes and summarizes the unique properties of chitosan, focusing on its mechanism of action for antibacterial and antioxidant properties. It provides valuable information for the development and application of chitosan-based antibacterial and antioxidant composites. Furthermore, chitosan can be modified to obtain functionalized materials with improved properties and diverse functions, showing promising applications in various fields of the food industry. This review discusses the applications, challenges, and future perspectives of functionalized chitosan in food.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Food Science & Technology
Wenqing Hu, Fan Gong, Qingfeng Dong, Yongfeng Kang, Yan Zhou, Boqiang Liu, Li Li
Summary: We developed a polylactic acid/polybutylene succinate film that significantly prolonged the shelf-life of red grapes by delaying weight loss, loss of hardness, and reduction in soluble solid content after harvesting. The film delayed the senescence of the grapes by reducing active oxygen species production and increasing antioxidant enzyme activity. This continuous and dynamic microenvironment regulation system is a promising method to study respiratory metabolism in fruit and extend food shelf-life.
JOURNAL OF FOOD SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Yi Hao, Mengmeng Zhang, Boqiang Liu, Wenya Ma, Qingfeng Dong, Min Fan, Yifen Wang, Li Li
Summary: In this study, chitosan (CS) was grafted onto the surface of polylactic acid (PLA) film to prepare CS-grafted PLA (CS-g-PLA) films with different molecular weights. The antibacterial effect and mechanism of action of these films against Staphylococcus aureus (S. aureus) were explored. The results showed that the CS-g-PLA films could effectively delay the decay of fish fillets for 1-4 days, making them suitable for aquatic product packaging and preservation.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Optics
Yilong Song, Lixiang Wang, Yongqiang Shi, Weihui Bi, Jianwu Chen, Mingwei Hao, Anran Wang, Xueying Yang, Yuan Sun, Fan Yu, Liansheng Li, Yanjun Fang, Deren Yang, Qingfeng Dong
Summary: By relieving interfacial stress, we have successfully improved the crystallinity and uniformity of organic-inorganic halide perovskite single crystals, enabling the direct preparation of large-area detector-grade wafers. The resulting radiation detectors exhibit excellent baseline stability and achieve a record high energy resolution under an ultralow operating bias, making them the best solution-processed semiconductor radiation detectors reported so far.
LIGHT-SCIENCE & APPLICATIONS
(2023)
Article
Multidisciplinary Sciences
Anran Wang, Yifei Kang, Chunqing Hou, Rong Li, Yilong Song, Qingfeng Dong
Summary: In this study, the melt blending crystallization (MBC) technique was used to achieve molecular-level blending and highly oriented crystallization in organic photovoltaics (OPVs). This approach increased the contact area between the donor and acceptor materials, enhancing exciton diffusion and dissociation. The method also enabled efficient carrier transmission and collection through highly organized crystalline nanodomain structures, resulting in improved device performance.
Article
Food Science & Technology
Yu Chen, Yong Liu, Qingfeng Dong, Min Fan, Li Li
Summary: A three-dimensional interwoven network composed of Van-PEG-MWCNTs was developed for the capture of Staphylococcus aureus. The introduction of Van-PEG endowed carbon nanotubes with activity against Staphylococcus aureus and improved their dispersibility in solution. The network efficiently captured Staphylococcus aureus, even at low levels, demonstrating its potential application for rapid and efficient detection.
Article
Materials Science, Multidisciplinary
Lixiang Wang, Yilong Song, Liqi Li, Liting Tao, Minxing Yan, Weihui Bi, Xueying Yang, Yuan Sun, Qingfeng Dong, Deren Yang, Yanjun Fang
Summary: Organic-inorganic halide perovskite single crystals show great potential as radiation detectors due to their excellent photoelectric conversion capability and low-cost solution processability. However, the presence of charge traps and defects in the crystals has limited the accuracy and stability of the detectors, especially under high-precision photon-counting mode. In this study, a trap freezing deactivation route was proposed to suppress dark current and noise, leading to a record high energy resolution of 7.5% at 59.5 keV. Furthermore, the ability of the crystals to self-heal defects induced by radiation damage at low temperatures was demonstrated, and the detector maintained over 90% of its initial performance after 9 months of storage in air.
Article
Chemistry, Physical
Jingwen Chen, Linlin Li, Wenhao Ran, Di Chen, Lili Wang, Guozhen Shen
Summary: A machine learning-based voice recognition platform was developed using a high sensitivity MXene/MoS2 flexible vibration sensor. The sensor exhibited high sensitivity and a broad frequency response, and achieved high speaker recognition accuracy through a machine learning-based artificial neural network.
