CHEMICAL ENGINEERING JOURNAL
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2024
·
IF 13.3
Desheng Yang,Chaofei Bai,Fengdan Zhu,Chang Liu,Cheng Zhao Tu,Guoping Li,Yunjun Luo,Tianfu Zhang
Designing highly active catalysts and constructing the interface between ammonium perchlorate (AP) and catalysts are effective strategies for achieving efficient thermal decomposition of AP, which is an urgent need for developing AP based composite solid propellants. Herein, we report an impregnation vacuum freeze-drying strategy to encapsulate AP in an independent three-dimensionally ordered macroporous (3DOM) CoFe 2 O 4 (3D CFO) spinel, resulting in a novel 3D CFO encapsulated AP nanocomposite materials (AP-3DCNCs). The connected pores of 3D CFO provide a model structure for the growth of AP nanocrystals, while the impregnation vacuum freeze-drying strategy ensures the uniform distribution of AP crystals in pores, effectively achieving the size effect of AP nanocrystals (39.88 ∼ 55.50 nm). By adjusting the loading capacity of the AP, the AP-3DCNCs configuration was effectively controlled. The thermal decomposition of AP-3DCNCs is greatly enhanced due to their unique configuration. The high-temperature decomposition temperature is significantly reduced by 180.06–141.78 °C, and the maximum equivalent heat release increased by 2.03 times. It can be foreseen AP-3DCNCs are attractive nanocomposites for the thermal decomposition of AP, and these results provide a convenient strategy for the preparation of transition metal-based composite catalysts with promising applications in the field of solid propellants.
研究领域:
材料科学
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推进剂领域
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产品关联
DOI
高影响因子
Materials Today Communications
·
2024
·
IF 3.7
Hao Peng,Xiaolan Song,Yi Wang,Zhipeng Cheng,Chongwei An
The nano-boron powder (n-B) exhibits remarkable efficacy as a combustion catalyst, making it a prime candidate for use in solid propellant metal burners. Nevertheless, throughout the storage phase, the surface of n-B powder is prone to oxidation and substantial agglomeration, resulting in challenges with ignition and incomplete energy dissipation when utilizing boron powder. In this study, we utilized the coaxial electrospinning technique to produce nanofibers comprised of nano-boron /nitrocellulose/ammonium perchlorate@fluororubber (n-B/NC/AP@F 2602 ), with the nano boron uniformly distributed within the core-shell fibers. In the course of combustion, the fibrous composite of n-B/NC/AP@F 2602 undergoes an escalation in the rates of energy output and energy release, owing to the constraints imposed by external F 2602 ((C₂H₂F₂) n and (C₃F₆) n ). The n-B/NC/AP@F 2602 demonstrates a 1.4-fold increase in peak pressure and a 3.6-fold increase in maximum boost rate when compared to the n-B/NC/AP. The energy performance evaluation results reveal that the mean molecular weight (MC) of combusted products from n-B/NC/AP@F 2602 is 29.2 g·mol −1 , representing a substantial increase compared to that of n-B/NC/AP. The aforementioned findings exemplify that coaxial electrospinning is an exceedingly efficacious technique for enhancing nanostructures, thereby amplifying the reactivity of energetic particles and offering novel insights into their application in energetic materials.
研究领域:
材料科学
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燃烧与推进
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DOI
高影响因子
Environment & Health
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2024
·
IF 0
Qingjiang Ding,Hailin Wang
Bisphenol AP (BPAP) is a bisphenol analogue that is used as a substitute for BPA in industrial production and is now commonly found in the environment. Currently, there is limited information available on its developmental toxicity in aquatic organisms. This study exploited zebrafish embryos to investigate the adverse effects of BPAP exposure during their early life stages. The results revealed that BPAP had a median lethal concentration (LC50) of 36, 22, and 8.5 μmol/L for zebrafish embryos at 24, 48, and 72 h post fertilization (hpf), respectively. Additionally, exposure to BPAP led to abnormal development in zebrafish embryos, including hatching delay, malformation, and inhibition of spontaneous movements. Transcriptomic analysis further revealed that BPAP exposure upregulated the mRNA expression levels of genes related to inflammatory pathways, such as il1b, ptgs2b, and fosab, indicating the induction of an inflammatory response. Overall, our findings provide early and valuable insights into the environmental and health risks associated with BPAP exposure.
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DOI
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
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2023
·Vol. 148
·期 21
·11669-11681
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IF 4.4
Liao Xueqin,Liu Jianzhong,Xu Peihui,Sun Mengxia
Aluminum particles have the problems of difficult ignition, easy agglomeration, incomplete combustion, etc. Therefore, it is of great scientific significance and engineering value to find ways to improve the ignition and combustion performance of aluminum particles in order to promote the full release of energy of aluminum particles. In this paper, spherical nano-sized ferric oxide (nFe 2 O 3 ) and ammonium perchlorate (AP), a commonly used oxidizer in propellants, were used to synergistically improve the ignition and combustion performance of aluminum particles. AP modified the aluminum particles by both mixing and coating methods, respectively. On the basis of coating AP, nFe 2 O 3 was added in order to further enhance the ignition and combustion performance of the aluminum particles. Scanning electron microscope, laser particle size analyzer, thermal analysis system and laser ignition experiment system were used to test the physicochemical properties and ignition combustion performance of different samples. The results showed that AP and nFe 2 O 3 could be coated relatively uniformly on the surface of aluminum particles using the recrystallization method. The thermal reaction behavior of the samples showed that coating was beneficial to the decomposition of AP compared with mixing, and the addition of nFe 2 O 3 could further improve the decomposition efficiency of AP. Ignition and combustion experiments showed that coating AP was more conducive to improving the ignition and combustion performance of aluminum particles than mixing AP, and the addition of nFe 2 O 3 could further significantly enhance the combustion intensity and flame propagation speed of the sample. However, the addition of nFe 2 O 3 increased the ignition delay time of the sample, which may be related to the cold agglomeration phenomenon caused by the nanoparticles. The microscopic combustion flame morphology of different samples showed that coating AP and the introduction of nFe 2 O 3 could significantly reduce the agglomeration phenomenon of aluminum particles. Overall, coating AP reduces the distance between the aluminum particles and the oxidizer, thus significantly improving the ignition and combustion performance of the aluminum particles. The addition of nFe 2 O 3 can further improve the combustion performance of aluminum particles, but at the same time, it also increases the ignition delay time. Hence, the cold agglomeration problem caused by nanoparticles should be fully considered when nFe 2 O 3 is used to improve the ignition and combustion performance of aluminum particles.
研究领域:
材料科学
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含能材料
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燃烧工程
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推进剂技术
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DOI
高影响因子
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
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2021
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IF 3.995
Ruidong Song,Taixin Liang,Yanli Guo,Chao Wang,Fei Xiao,Wei Liu,Jiangbo Zhang
The preparation of catalysts with small particle size, large specific surface area and high atomic utilization has always been the focus of research in the field of catalysis. As for energetic materials, catalysts are always used to improve the thermal decomposition performance of ammonium perchlorate (AP) as it has significant effect on the power of engine. In this work, a two-dimensional metal clusters catalyst has been successfully prepared by solvothermal and heat treatment to improve thermal decomposition performance of AP. In detail, the transition metal ions were supported on the graphene oxide (GO) surface by organic ligands linking, followed by heat treatment to obtain two-dimensional rGO based metal clusters catalyst. The morphology and structure of the catalysts at different temperatures and their effect on AP decomposition were studied, the results show that catalyst at 300 °C has a particle size of 20 nm and uniformly distributed on rGO. The catalyst promotes the high temperature decomposition of AP by 73.7 °C with improved stability, and increases the heat release from 652.73 J/g to 1392.11 J/g. This may be attributed to good conductivity of GO and the strong gain-loss electron ability of the metal clusters. The presence of GO increased the active sites for cluster catalysis, additional, the metal clusters have a positive synergistic effect with GO. Thus, the thermal decomposition performance of AP was enhanced meanwhile thermal stability can also be improved.
研究领域:
材料科学
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催化化学
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产品关联
DOI
高影响因子
Frontiers in Chemistry
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2022
·
IF 5.545
Zhao Jun,Deng Nengmei
The thermal decomposition performance of an oxidizer directly determines the thrust and specific impulse properties of the solid propellant. Hexagonal boron nitride (h-BN) has the characteristics of high catalytic activity and good stability, which can improve the heat release and decomposition temperature of the oxidant, and then improve the energy performance of the propellant. In this study, a novel hybrid material TiO2 NPs/h-BN was successfully prepared by in situ growth, and it was found that when 5 wt.% TiO2 NPs/h-BN was added, the initial decomposition temperature of ammonium perchlorate (AP) decreased by 67.6°C. Due to the addition of TiO2, the gap between the h-BN layers as well as the specific surface increased, which optimized its thermocatalytic performance, and it also proposed a catalytic mechanism for the thermal decomposition process of AP.
研究领域:
材料科学
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催化化学
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产品关联
DOI
PubMed
高影响因子
DALTON TRANSACTIONS
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2025
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IF 3.3
Yanyang Li,Lu Lei,Sirui Shu,Jian Zou,Shanshan Hu,Jun Yang
Sb3+ doped inorganic perov-skites have attracted great attention for anti-counterfeiting and infor-mation encryption applica-tions due to their excellent optical properties. We have synthesized a novel perov-skite Cs2KLuCl6, which ex-hibits weak cyan emission originating from the self-trapped excitons (STEs) of the host. Its photolumines-cence quantum yield is enhanced from 2% to 68% by Sb3+ doping. The energy transfer channel from STEs to Ho3+ was constructed, and the luminescence color was modulated from cyan to white with the increase of Ho3+ doping concentra-tion. The Sb3+/Ho3+ co-doped sample has two-color luminescence performance due to the introduction of new emission centers. Up-conversion green emission was obtained by introduc-ing Yb3+/Er3+. Finally, the optical properties of the obtained samples were utilized to design an anti-counterfeit label and in-formation encryption strategy.
研究领域:
材料科学
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光学材料
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光子学
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无机化学
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安全技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2024
·
IF 12.2
Mingliang Zhang,Weihao Zhu,Hongfei Liu,Kaihua Pan,Qian Li,Qian Zhu,Yanni Huang,Changchang Wang,Junqiang Hu,Mingli Jiang,Xin Yan,Qing Hong
Acetaminophen (APAP), an analgesic and antipyretic drug, is commonly detected in wastewater treatment plant (WWTP) effluents, surface water, and soil, indicating its status as an emerging environmental contaminant. In this study, we isolated a bacterium, Pseudomonas taiwanensis AP-1, capable of completely mineralizing APAP and utilizing it as the sole carbon source for growth. A newly identified metabolite, γ-glutamyl-4-aminophenol (γ-G4AP), was reported for the first time in the degradation of APAP by strain AP-1. Two amidases (ApaH1 and ApaH2), responsible for the conversion of APAP to 4-aminophenol (4-AP), were identified through a combination of genomic comparison, heterologous expression, and gene knockout. Notably, ApaH1 played a pivotal role in the degradation of APAP by strain AP-1. The catalytic triad of ApaH1 (K82-S161-S185) and ApaH2 (K85-S160-S184) were identified as by molecular docking and site-directed mutagenesis. Additionally, a gene cluster apd for the metabolism of 4-AP was also successfully identified in strain AP-1, consisting of the aniline dioxygenase gene cluster apdBCD1D2EF and the BT catabolic gene apdGH . Interestingly, the 4-AP metabolic gene cluster apd was highly conserved among other Pseudomonas strains capable of APAP degradation. Our results provide new insights into the mechanism of APAP biodegradation and strain AP-1 may be a promising bacterium for the bioremediation of APAP pollutions.
研究领域:
环境科学
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微生物学
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药物代谢
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产品关联
DOI
PubMed
高影响因子
FULLERENES NANOTUBES AND CARBON NANOSTRUCTURES
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2023
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IF 2.3
Qiang Ling,Zhi-hao Wang,Han-wen Liang,Rong Wu,Zhao Lei,Zhi-gang Zhao,Qing-ping Ke,Rui-lun Xie,Xiang-chun Liu,Ning Zhang,Ping Cui
We reported an experimental and theoretical study on the promotion role of F doping in the improved catalytic performance of fluorinated graphene(F-GO) for ammonium perchlorate (AP) pyrolysis. F-GO was prepared by using graphite oxide (GO) as carbon sources and CF3COOH as fluorinating agent. Compared with other samples, the F-GO-180 with the highest F doping amounts, more C-F semi-ionic and C-F covalent bond amounts exhibit superior catalytic performance, as 10 wt% of catalyst added in AP, the exothermic peak temperature proceeded in just one step was even lower than the HTD peak temperature for pure AP and the released apparent specific heat of the thermal decomposition of AP catalyzed by F-GO-180 is 4261.2 J/g, which is almost sevenfold of that of pure AP (603.5 J/g). The doping of F atoms in graphene increased surface defects and the content of C-F semi-ionic and C-F covalent bond amounts of F-GO, which provided more active sites during the thermal decomposition of AP. The molecular simulation calculation results further confirmed that the F doping could react with the defect structure of graphene to form more C-F semi-ionic and C-F covalent bond, which could act as catalytic active sites and facilitate the electron transfer ability of the graphene to promote the formation of free radicals in the reaction.
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DOI
高影响因子
PROPELLANTS EXPLOSIVES PYROTECHNICS
·
2018
·Vol. 43
·期 7
·637-641
·
IF 1.749
Naimeng Song,Jianchao Liu,Guoying Zhang,Zhenzhan Yan,Hongxu Gao,Li Yang
This paper describes the preparation of two combustion catalysts Tannin-Fe (Ta−Fe) and Phloroglucinol-Fe (Ph−Fe) by spray drying. The particle size and morphology of the particles are observed by scanning electron microscopy (SEM). The results of SEM image show that the particles are regular spherical and very good dispersion. The diameter of most spherical particles is about 1 μm. The effects of Ta−Fe and Ph−Fe on the thermal decomposition of RDX and AP were tested by differential scanning calorimeter (DSC). DSC dates show that Ta−Fe and Ph−Fe can advance the high temperature exothermic peak of AP 18.0 °C and 16.1 °C, respectively. The burning rates illustrates that both Ta−Fe and Ph−Fe can significantly increase the combustion rate of HTPB propellants. The formulation with 2 mass% Ta−Fe shows an average 21.31 % increase in burning rate and has a low value of the exponent n=0.48. The formulation with 2 mass%Ph−Fe has a burning rate 20 to 60 % larger than that of the initial AP/HTPB/Al formulation, and has a lowest exponent n=0.45.
研究领域:
材料科学
·
燃烧与推进
✓ 已验证
产品关联
DOI
高影响因子
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
·
2024
·
IF 6.2
Yuanyuan Song,Xing Zhang,Binquan Wang,Xiaoxiao Luo,Ke Zhang,Xiaoyan Zhang,Qian Wu,Mingkuan Sun
Bisphenol AP (BPAP), an environmental endocrine disruptor, may cause neurodevelopmental disorders affecting human health. Studies have shown that BPAP impacts hormone synthesis and metabolism, causes social behavior abnormalities, and induces anxiety-like behavioral impairments in mice. However, evidence for the neurobehavioral effects of BPAP is still lacking. Here, we examined the toxic effects of BPAP on neurodevelopment using a Drosophila model. We assessed the role of BPAP exposure in autism-like behavior and explored the underlying mechanisms. Our findings indicated that BPAP exposure reduced pupation and eclosion rates and delayed growth in Drosophila . Furthermore, BPAP exposure caused autism-like behaviors, characterized by increased grooming times and aberrant social interactions, along with abnormalities in locomotor activity, as well as learning and memory ability. Mechanistically, we found that BPAP decreases the number of neuroblasts (NBs) and mature intermediate neural progenitors (INPs) in the 3rd larval brain, impairing axon guidance in the mushroom body of the adult Drosophila brain. Additionally, our transcriptome analysis revealed that BPAP exposure alters the expression of neurodevelopment-related genes ( Nplp3 , sand , lush , and orco ) and affects the estrogen signaling pathway ( Hsp70Ab , Hsp70Bc , Hsp70Ba , and Hsp70Bb ). These changes potentially explain the BPAP-induced autism-like behavior in Drosophila .
研究领域:
神经生物学
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环境科学
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分子生物学
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DOI
PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2021
·Vol. 138
·期 25
·50585
·
IF 3.125
Pengcheng Li,Dawei Yan,Lin Luo,Wanli Tang,Haohao Ren,Yonggang Yan
A series of poly(arylene ether nitrile) copolymers (PENAPs) were synthesized with bisphenol A (BP-A), bisphenol AP (BP-AP) and 2,6-Dichlorobenzonitrile (DCBN) via a nucleophilic substitution polycondensation reaction. FTIR and 1 H-NMR were used to confirm the structure of PENAPs. Glass transition temperature ( T g ) of PENAPs determined by differential scanning calorimetry (DSC) ranged from 154.2 to 200.8°C. The 5% weight lost temperature ( T 5% ) of PENAPs were 418.9–447.7°C. The tensile and DMA test indicated that PENAPs possessed excellent mechanical properties with tensile strength more than 92.8 MPa and storage modulus more than 1.0 GPa at about 150°C. The melt flowability was measured by rheology properties testing ranging from 80 to 1639 GPa at 290°C and under shear frequency 100 Hz, which indicated the copolymers had good flowability and thermal stability. Additionally, PENAPs could be dissolved in many solutions, which meant PENAPs had good solubility and can be processed by solution method.
研究领域:
高分子化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）