Article
Chemistry, Physical
Jinjie Chang, Lu Hu, Siping Pang, Chunlin He
Summary: The change of environment and climate has led to frequent biological hazards, posing a challenge to human biological security. Research on new and efficient biocidal materials is increasing globally. In this study, furazan was introduced into the field of iodine-containing biocidal materials, and four iodine-containing furazan compounds were successfully synthesized. These compounds showed high detonation velocities (>5000 m/s) and iodine content (>50%), indicating their potential use as high-performance biocidal agents. Compound 3 exhibited the highest detonation velocity (6668 m/s) among all reported organic energetic biocidal materials. Compounds 5 and 6 showed excellent overall performance as bactericidal materials, with high detonation velocity, detonation pressure, thermal stability (≥235°C), and iodine content (= 58.5%). This study provides a promising strategy for the future design and synthesis of energetic biocidal compounds.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Physical
Jonas Sarlauskas, Jelena Tamuliene, Svajone Bekesiene, Alexander Kravcov
Summary: The conjugation of substituents is a crucial factor for the thermal stability of benzimidazole compounds, while nitro groups can increase the chemical stability and explosive properties of the compounds but also increase their toxicity.
Article
Engineering, Environmental
Taeyeon Kim, Keunyoung Yun, Nahyun Kim, Byungjun Cha, Jonghun Han, Lewis Kamande Njaramba, S. SD. Elanchezhiyan, Chang Min Park
Summary: Considerable amounts of phenols and their derivatives are present in water bodies, posing a threat to the environment due to their resistance to decomposition and high toxicity. This study focuses on the development of a novel aluminum-based metal-organic framework aerogel composite (GMA-1.0) as an effective adsorbent for the removal of phenolic compounds from aqueous environments. The results show that GMA-1.0 exhibits excellent adsorption capacity, selectivity, and performance, making it a promising material for phenolic waste remediation.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Engineering, Chemical
Dongyang Qiu, Zhangqiang Dong, Chong Liu, Lijuan Liu, Yue Chen, Qi Zhao, Chuyuan Huang, Hongming Zhang, Xianfeng Chen
Summary: In this study, a series of experiments were conducted to investigate the suppression effects of inhibitors on the flame propagation of aluminum powders with different morphologies. The results showed that flaky aluminum powder (F-Al) required a larger amount of inhibitor compared to spherical aluminum powder (S-Al). Piperazine pyrophosphate (PPAP) showed stronger chemical effects in inhibiting S-Al, while nano-SiO2 exhibited more significant physical effects in suppressing F-Al.
Article
Biochemistry & Molecular Biology
Jing Yang, Tiantian Bai, Junxia Guan, Minbei Li, Ziyu Zhen, Xiangyi Dong, Yahui Wang, Yu Wang
Summary: This study aims to develop high-energy density materials with a delicate balance between exceptional performance and minimal sensitivity. A total of 39 derivatives were designed and evaluated using density functional theory. The introduction of fluorine-containing substituents or fluorine-free substituents into the backbones significantly enhanced the detonation performance of the derivatives. The molecular design strategy contributes to the development of novel high-energy density materials with excellent detonation performance and stability.
JOURNAL OF MOLECULAR MODELING
(2023)
Article
Chemistry, Multidisciplinary
D. A. Gulyaev, M. S. Klenov, A. M. Churakov, Yu. A. Strelenko, A. N. Pivkina, V. A. Tartakovsky
Summary: The reaction of 3-amino-4-[(3-nitro-1H-1,2,4-triazol-1-yl)-NNO-azoxy]furazan (4a) with 2,2,2-trifluoro-N-(4-nitrosofurazan-3-yl)acetamide (6) in the presence of dibromoisocyanuric acid (DBI) led to the synthesis of a new compound 5a, which can be further oxidized to form the nitro derivative 5b or reacted with DBI to yield the azo compound 5c. These compounds, with characteristics such as thermal stability and enthalpy of formation, may have potential as energetic substances.
RUSSIAN CHEMICAL BULLETIN
(2021)
Article
Chemistry, Multidisciplinary
Ibrahim Y. Yaagoob, Lipiar K. M. O. Goni, Mohammad A. J. Mazumder, Shaikh A. Ali, Mumtaz A. Quraishi, Chandrabhan Verma
Summary: The present study focuses on the synthesis and characterization of a polymeric surfactant containing bis-cationic motifs and its application as a corrosion inhibitor for C1018 carbon steel. The synthesized polymer showed excellent inhibition efficiency at different concentrations and temperatures. Various experiments revealed that the polymer works by adsorbing at the steel interface and acts as a mixed-type inhibitor by blocking active corrosion sites. The proposed adsorption mechanism was supported by DFT studies.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Materials Science, Multidisciplinary
S. Rommel, H. R. Leonard, M. X. Li, T. J. Watson, T. Policandriotes, M. Aindow
Summary: The impact of surface corrosion product layers on the pitting corrosion behavior of three Al-Cr-Mn-Co-Zr alloys has been studied. The study found that the corrosion product bilayer can improve the resistance of the alloys to pitting corrosion.
JOURNAL OF MATERIALS SCIENCE
(2022)
Article
Metallurgy & Metallurgical Engineering
Dongling Qian, Kai Lan, Yitao Yang
Summary: This study investigates the microstructure evolution and mechanical properties of the Al-3.4Si-0.6Mg-0.5Mn alloy after solution treatment at different temperatures and T6 heat treatment. The as-cast microstructure consists of α-Al, eutectic Si, π-Al8Mg3FeSi6(Mn), and α-Al-15(Fe, Mn)2Si3 intermetallics. The solution treatment leads to the dissolution of π-Fe intermetallics, spheroidization of eutectic Si, and precipitation of Mn-enriched dispersoids. The T6 heat treatment effectively improves the mechanical properties by mitigating the negative effects of π-Fe intermetallics and eutectic Si, resulting in enhanced elongation to fracture and yield strength.
INTERNATIONAL JOURNAL OF METALCASTING
(2023)
Article
Materials Science, Composites
Edison E. Haro, Akindele G. Odeshi, Santiago Castellanos, Xavier Sanchez, Lenin Abatta, Linker Criollo, Alejandra Alban, Jerzy A. Szpunar
Summary: Hybrid composites armors made of closed-cell aluminum foam were developed for ballistic protective plates. The addition of various micro and nano-fillers to the aluminum foam plates enhanced the ballistic response of the armors. The highest impact energy absorption capacity was achieved with the deposition of Kevlar micro-fibers, but resulted in plates with higher weight and thickness. Silica carbide powder, gamma alumina, and colloidal silica powder improved impact energy absorption capability with lower weight and thickness. Introduction of micro and nano-fillers coating on closed-cell aluminum foam improved the interfacial bonding between layers of the composites.
COMPOSITES PART C: OPEN ACCESS
(2023)
Article
Chemistry, Multidisciplinary
Alexey A. Konnov, Michael S. Klenov, Aleksandr M. Churakov, Igor L. Dalinger, Yurii A. Strelenko, Ivan V. Fedyanin, David B. Lempert, Alla N. Pivkina, Tatiana S. Kon'kova, Yurii N. Matyushin, Vladimir A. Tartakovsky
Summary: Novel energetic furazans with different substituents have been synthesized and characterized. These compounds exhibit high enthalpies of formation, good thermal stabilities, and high detonation parameters. Some of these compounds have been evaluated as effective fillers for solid composite propellants, showing higher specific impulse values compared to other common formulations.
ENERGETIC MATERIALS FRONTIERS
(2023)
Article
Materials Science, Multidisciplinary
E. A. Vlasova, K. A. Valueva, Yu S. Solomkina, B. L. Gorberg, S. Makarov
Summary: In this work, nickel- and iron-modified aluminum-containing framework compounds were prepared for the first time using an environmentally friendly method, and showed good catalytic activity for hydrogen peroxide oxidation. The addition of a small amount of these catalysts increased reaction rate constant, and the materials retained their performance for multiple cycles. A proposed mechanism suggested that hydroxyl radicals acted as oxidizing species in the presence of the synthesized metal complexes.
INORGANIC MATERIALS
(2021)
Article
Engineering, Electrical & Electronic
Ru Xu, Peng Chen, Menghan Liu, Jing Zhou, Yimeng Li, Kai Cheng, Bin Liu, Dunjun Chen, Zili Xie, Rong Zhang, Youdou Zheng
Summary: In this study, high-performance lateral AlGaN/GaN Schottky barrier diodes (SBD) on Si substrate with a recessed-anode structure were demonstrated. The optimized process and design resulted in significant improvements in breakdown voltage and on-resistance, making it a promising candidate for power electronics applications.
IEEE ELECTRON DEVICE LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Hui Dou, Peng Chen, Chun-Lin He, Si-Ping Pang
Summary: Oxygen plays a crucial role in improving the properties of energetic compounds. In this study, a series of oxygen-containing imidazo[1,2-d][1,2,4]oxadiazole based compounds were synthesized and characterized. Compound 6 showed comparable performance to RDX, demonstrating the effectiveness of constructing oxygen-containing fused-ring backbone in enhancing the properties of energetic compounds.
ENERGETIC MATERIALS FRONTIERS
(2023)
Article
Optics
Cui Zixiao, Wu Huace, Wu Ding, Liu Jiamin, Hu Xiaohan, Hai Ran, Li Cong, Ding Hongbin
Summary: This study investigates Laser-Induced Breakdown Spectroscopy (LIBS) as a technique for in-situ wall diagnostics in tokamaks. The researchers focus on the accurate quantitative analysis of wall surface elements, which has been a critical challenge due to the spatiotemporal non-uniformity of laser-induced plasma. By employing a coaxial optical structure and conducting detailed spatiotemporal measurements, the researchers gained valuable insights into the plasma's behavior during laser ablation. The study provides crucial information for the development of advanced wall diagnostics techniques in fusion research.
ACTA PHOTONICA SINICA
(2023)