COMBUSTION AND FLAME
·
2021
·
IF 4.185
Ke-Juan Meng,Haorui Zhang,Shuai-Zhong Wang,Yi Wang,Qinghua Zhang,Qi-Long Yan
Owing to the novel insensitive high-energy-density material 2,4,6-triamino-5-nitropyrimidine-1,3-dioxide (ICM-102) has lower sensitivity and higher energy(see in Table S1, Supporting Information), it has great advantages in the application of low-vulnerability propellants. In this paper, the evaluation of ICM-102-containing composite propellants has been carried out, where the decomposition and combustion performances of these propellants have been comprehensively investigated. It has been shown that the main exothermic decomposition peak temperature can be increased from 235 ºC to 350 ºC, when 6 to 10 wt% of ICM-102 was used to replace RDX, but heat release rate was largely increased. Moreover, the burning rate of ICM-102 containing propellants at 3 MPa is in the range of 6.97–7.75 mm• s − 1, depending on its content. The pressure exponent (0.5–3 MPa) is between 0.34–0.44. Compared with the typical propellants with RDX, the burn rate and the flame temperature of ICM-102- containing propellants are higher. In addition, the particle size distributions of condensed combustion products of ICM-102 propellants are narrower and smaller than that of RDX-based one. It also shows that extra products such as aluminum carbide (Al20C) and aluminum oxide nitride (Al5O6N) were produced once ICM-102 was used.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
COMBUSTION AND FLAME
·
2025
·
IF 6.2
Xiaohui Xue,Tuanwei Xu,Bozhi Hu,Wenke Zhang,Jianzhong Liu
In this study, the agglomeration behavior, gaseous combustion products flow velocity and characteristics of condensed combustion products (CCPs) from a HTPB-based solid propellant were systematically investigated under low-pressure and low-temperature conditions. Furthermore, the underlying mechanisms of these environmental effects were discussed. High-speed microscopic imaging was employed to observe and quantify the agglomeration behavior near the burning surface. Meanwhile, the gaseous combustion product stream velocity in this region was analyzed using both kinetic modeling and theoretical calculations. Experimental results show that when pressure decreases from 1 atm to 0.5 atm, the agglomerate occurrence frequency drops by 90.2 %, the average particle size increases by 14.4 %, and the gaseous product velocity rises by 52.1 %. When reducing the ambient temperature from 20 °C to −40 °C leads to an 18.1 % decrease in agglomerate frequency and a 6.5 % reduction in average particle size, while its effect on gaseous velocity remains inconclusive. Characterization of CCPs reveals that both low pressure and low temperature significantly alter the particle size distribution and reduce the combustion efficiency of solid propellants. Within the experimental conditions of this study (0.3 atm to 1 atm, −40 °C to 20 °C), the impact of pressure changes is greater than that of temperature.
研究领域:
航空航天工程
·
燃烧科学
·
材料科学
·
推进技术
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2024
·
IF 6.7
Yuhuai Shi,Xuefang Cao,Qiaoni Ren,Tengyue Song,Yuhao Wu,Zhixian Wei,Xiong Cao
This study explores the potential of energetic metal–organic frameworks (E-MOFs) to enhance the combustion performance of solid propellants. A {[Bi 6 O 3 (tza) 5 (NO 3 ) 2 (OH) 5 ]·H 2 O} n (Bi-MOF) incorporating the energetic ligand tetrazole-1-acetic acid (Htza) was synthesized and evaluated for structural characteristics and properties. The catalytic thermal decomposition of cyclotrimethylene trinitramine (RDX) and cyclotetramethylene tetranitramine (HMX) by mixed systems was investigated. These systems consisted of Bi-MOF and copper-iron hetero-metallic compound ({[CuFe 3 O(tza) 6 (H 2 O) 3 ]·Cl·(NO 3 ) 2 ·4H 2 O} n , CuFe-MOF), previously reported by our group in different ratios. The effect of the mixed system with the highest synergy index on the combustion performance of composite modified double-base propellant (RDX-CMDB) and nitrate ester plasticized polyether propellant (HMX-NEPE) was investigated. The impact of varying carbon black (CB) contents on the catalytic performance of the mixed system was also examined. The results showed that Bi-MOF exhibits good thermal stability ( T dec = 226.9 °C) and insensitivity ( IS >40 J, FS >360 J). The mixed system, comprising Bi-MOF and CuFe-MOF in a 2:1 ratio (M 2 ), exhibited the highest synergistic indices (3.35 and 3.24) on thermal decomposition for RDX and HMX. RDX-CMDB and HMX-NEPE propellant formulations containing M 2 and a small amount of CB exhibited significant improvements in combustion performance. RDX-CMDB propellant exhibited up to an 80.6 % increase in burning rate and up to a 59.6 % reduction in pressure index. The pressure indices of NEPE without and with aluminum were reduced from 0.65 and 0.50 to 0.38 and 0.40, respectively (10–20 MPa, 1–20 MPa). These findings highlight the promise of the mixed system, formed by Bi-MOF and CuFe-MOF, as a potential combustion catalyst for RDX-CMDB and HMX-NEPE propellants.
研究领域:
材料科学
·
推进剂化学
·
燃烧学
·
无机功能材料
·
能源材料
·
应用化学
✓ 已验证
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2020
·Vol. 44
·期 44
·19184-19191
·
IF 3.288
Jing Tu,Heng Xu,Li Liang,Pingyun Li,Xiaode Guo
The problem of debonding the interface between propellant grain and propellant coating has been a tricky problem that has puzzled many scholars. Self-healing adhesives are expected to solve this problem. Herein, we studied the most widely used HTPB system in composite propellants. By adopting free radical polymerized HTPB as the soft segment of the adhesive and introducing aromatic disulfides, we successfully prepared a self-healing polyurethane adhesive. The adhesive can self-heal at a safe temperature of 80 °C, with an elongation at break of more than 700% and a self-healing efficiency of up to 97%, and has excellent thermal stability. The interface self-healing experiment showed that the adhesive can recover the debonding damage at the interface. Our results will provide a new insight into the rebonding of the interface between propellant grain and coating.
研究领域:
材料科学
·
航空航天工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2022
·Vol. 57
·期 6
·4092-4103
·
IF 4.682
Chen Zongchen,Jiang Jiwei,Wang Xin,Zhang Hui,Song Bo,Dong Bin
Inspired by the swarming behavior of various bacteria in nature, light-driven micromotor with collective behavior has attracted a great deal of attention, which will be a valuable tool to understand the cooperation and communication between bacterial populations and will contribute to the creation of reconfigurable microrobots and the cooperative transportation of large cargoes. However, it is still challenging to modulate the micromotors’ collective behavior based on local interaction and communication. Herein, we develop a light-powered BiVO 4 -based micromotor with self-propulsion and dynamic ‘predator-bait’ collective behavior, which is based on the photocatalytic reaction of BiVO 4 . The BiVO 4 -based micromotor has great potential in the field of organic pollutant degradation with enhanced apparent rate constant (0.076 min −1 ) which originates from the dynamic ‘predator-bait’ behavior.
研究领域:
材料科学
·
环境科学
·
仿生学
✓ 已验证
DOI
高影响因子
COMBUSTION AND FLAME
·
2020
·
IF 4.57
De-Yun Tang,Zhi-Min Fan,Guangcheng Yang,Yinglei Wang,Pei-Jin Liu,Qi-Long Yan
Aluminum (Al) has been widely used in solid composite propellants (SCPs) to increase the specific impulse. However, Al always subjects to coalescence , sintering to large agglomerations during combustion of SCPs resulting in larger two-phase flow losses. Herein, core-shell μ-Al@M(IO 3 ) x composites have designed and synthesized as a replacement for micron-sized Al (μ-Al) in the Al/AP/RDX/HTPB propellant with tunable combustion behavior. The results show the thermal reactivity and heat releases of SCP are largely enhanced by using these novel metal-based composites. With the inclusion of μ-Al@EGCG@Fe(IO 3 ) 3 (EGCG: Epigallocatechin gallate), the major exothermic peak is reduced by 29.1 °C compared to the reference propellant with a heat release increase up to 5475 J g −1 , exceeding that of the reference sample (86 J g −1 higher). The burn rates are increased with the inclusion of μ-Al@(MIO 3 ) x , while the pressure exponent is higher. The SCP-1 (0.3), SCP-2 (0.18) and SCP-4 (0.25) that have relatively low pressure exponent and high burn rates are good candidates for future applications. The major condensed combustion products (CCPs) of these SCPs are Al 2 O 3 , Al 2.81 O 3.56 N 0.44 , Al 4 C 3 , Al 2 OC, AlN and C 7 H 18 ClN. The agglomeration can be reduced with a minor inclusion of μ-Al@M(IO 3 ) x due to the enhanced interfacial reactions, and the average CCP sizes (0.5 μm for SCP-1 and SCP-4) are even smaller than that of initial μ-Al (1.2 μm).
研究领域:
材料科学
·
燃烧学
✓ 已验证
产品关联
DOI
高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2023
·
IF 5.4
Jiao Li,Jian Zhang,Hongyu Zhang,Xuwen Wang,Taojie Lu,Jiayan Liang,Yulin Yang,Kaifeng Lin,Debin Xia
Interface modification of aluminum particles plays a crucial part in reducing the agglomeration during the combustion of solid propellants . In this study, the aluminum (Al) particles are pretreated with gallic acid (GA) to get Al@GA with an adhesion-favorable surface, which facilitates the further coating procedure. One new fluorine-containing organic substance is prepared, namely p-HFBA. The p-HFBA further coats the Al@GA to produce Al@GA/p-HFBA. The interface between Al@GA and the coating layer p-HFBA forms Al F bonds and induces a pre-ignition reaction with an aluminum oxide shell. Hence, the agglomerate size of propellants containing Al@GA/p-HFBA significantly decreases from 176.30 μm to 84.72 μm. The agglomerates volume is reduced by approximately 97 %. Additionally, more gaseous products investigated by TG-MS provide the Al particles with greater impetus (aerodynamic forces, F ae ), enabling them to leave the burning surface and reduce the residence time. The rise in F ae and drop in adhesion force ( F ad ) effectively reduce the agglomeration intensity according to the skeleton layer model. This work proves that interface modification can effectively enhance the combustion performance of aluminized solid propellants .
研究领域:
材料科学
·
燃烧学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Xiang Zhou,Xiuhong Huang,Bincheng Wang,Lihui Tan,Yi Zhang,Yanpeng Jiao
Passive diffusion-based drug delivery systems have indeed shown impressive performance to overcome a cascade of biological barriers, but the delivery efficiency is still modest. Although artificial micro/nanomotors are capable of autonomous movement, oriented navigation and seeking target actively represent an alternative and attractive strategy to revolutionize drug delivery patterns potentially, the separated and single propulsion mode of motors still hampers their further biomedical application that needs to overcome successive biological barriers. Herein, we demonstrated a cascaded NIR-light/gas-driven Janus calcium carbonate particle micromotors (JCPMs) to overcome multi-staged biological barriers and achieved active drug delivery. These JCPMs exhibited NIR light-driven thermophoretic motion with precisely steered start/stop switch, speed, and motion trajectory in biological media and displayed CO 2 -bubbles-powered autonomous propulsion in an acidic environment. With the collaborative use of cascaded light/gas double-mode driving, JCPMs displayed a multistage self-adapted strategy to overcome sequential biological barriers during tumor-targeted drug delivery in a cascaded manner, involving of light-driven active tumor cells seeking, facilitated tumor penetration and cellular membranes traversal by virtue of photo-thermomechanical force and self-thermophoretic propulsion, gas-driven lysosomes escape and intracellular drug release successively. Such a strategy guaranteed trajectory-controllable active drug delivery to exert the selective tumor therapeutic effect as well as avoided side effects. We envisioned that the proposed cascaded driving mode of micromotors for traversing biological barriers would boost the delivery efficiency for tumor treatment, which may pave a convenient and versatile way to develop next generation active vehicles in the biomedical field.
研究领域:
生物医学工程
·
药学
·
纳米技术
·
癌症研究
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
·
2025
·
IF 4.7
Xueying Sun,Lina Xie,Wenlong Huo,Kaifeng Lin,Yulin Yang,Xuhui Chi,Chengyuan Zhao,Fengtao Zhang,Junzhuo Li,Debin Xia,Jian Zhang
In this study, an organic molecular probe containing an imine (C=N) linkage was synthesized and embedded in a polymethylmethacrylate (PMMA)/polyethylene glycol (PEG) matrix to fabricate a porous optical film for NO 2 gas detection via solid-state UV spectroscopy. Upon exposure to NO 2 , the film exhibited significant spectral changes, with a detection limit as low as 26.45 ppm. Mechanistic investigations revealed that NO 2 induced non-covalent interactions with the probe, triggering structural reorganization and enhanced π-conjugation. Density Functional Theory (DFT) calculations further supported these findings by confirming changes in electronic structure and energy levels. Additionally, preliminary tests demonstrated the feasibility of applying this probe film for aging detection of NEPE propellants, offering a promising non-destructive approach for monitoring propellant health.
研究领域:
材料科学
·
化学
·
环境监测
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Yihong Chen,Lili Yin,Hao Dong,Yang Hu,Xiangzhao Mao
Efficient enzymatic degradation of marine polysaccharides is hindered by the limited mass transfer induced from the high viscosity. In this study, taking viscous chitosan as an example, a urease-powered hollow mesoporous silica micromotor (UHMSMM) was prepared as the carrier to immobilize chitosanase (Chi), aiming at improving the degradation of chitosan by self-propulsion. At a urea concentration of 300 mM, Chi@UHMSMM exhibited the maximum motion behavior, confirmed by the doubled diffusion coefficient, even in viscous chitosan. The enhanced motion behavior improved the enzymatic performance. The catalytic efficiency was significantly increased, confirmed by the enhancement (3.8 times) of k c at / K m value. It is demonstrated that the autonomous movement could induce the micromixing of fluid in the microenvironment around Chi according to the simulated result, contributing to improved substrate affinity and catalytic efficiency. Also, the immobilization of Chi on UHMSMM induced a common improvement of enzyme immobilization, including enhanced thermo-stability and acid resistance. As a result, Chi@UHMSMM could work as an efficient platform for degrading chitosan, with a 125.75 % yield enhancement within 40 min. In this work, the reported strategy, which accelerates the enzymatic degradation of chitosan by the self-propulsion of enzyme-driven micro/nanomotors offers a novel approach for improving enzyme reactions in high-viscosity systems.
研究领域:
生物化学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
PROPELLANTS EXPLOSIVES PYROTECHNICS
·
2019
·Vol. 45
·期 3
·493-502
·
IF 1.634
Zhicheng He,Zhixun Xia,Jianxin Hu,Likun Ma,Yang Li
To study the mechanical properties of lithium-perchlorate/polyvinyl alcohol-based aluminized electrically controlled solid propellant (LP/PVA-Al-ECSP), the effects of Al particle size, grading, and content on the mechanical properties of the propellant at various temperatures were investigated. The uniaxial tensile experiments were conducted over the temperature range from −40 °C to +50 °C using universal testing machine with a crosshead speed of 100 mm min −1 . A scanning electron microscope (SEM) was employed to observe the fracture surface morphologies of the specimens. The results indicate that Al powder and temperature greatly affects the mechanical properties of the composite propellant. From experiments in which the size and the fine-to-coarse ratio of Al were changed at constant solid loading, the tensile strength and initial modulus of the propellant are improved with the increase of Al particle size and coarse-to-fine ratio at 25 °C. The increase in Al content improves the tensile strength and initial modulus of the propellant, whereas reduces the elongation. The results of experiments in which the temperature changed indicate that the tensile strength and initial modulus of the propellant are improved at low temperatures, whereas the mechanical properties of the propellants deteriorate at high temperatures. The elongation of the propellants is greatly reduced at low temperatures. The stress−strain curve of ECSP shows three regions at low temperatures and five regions at room temperature and high temperatures. The LP/PVA-Al-ECSP has poor tensile strength and initial modulus, whereas its elongation is extremely high at room temperature. The propellant with 5 μm Al to 65 μm Al ratio of 3/7 exhibits the best comprehensive mechanical properties.
研究领域:
材料科学
·
航空航天工程
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2020
·
IF 3.557
Ming Luo,Shouli Li,Jieshuo Wan,Chenglin Yang,Beidi Chen,Jianguo Guan
Enzyme-powered micro/nanomotors propelled by biocompatible fuels generally show a weak propulsive force, which greatly limits their applications in complex biological environments. Herein, we have developed a novel and versatile approach to significantly enhance the propulsion of enzyme-powered micromotors by multilayered assembly of enzymes. As an example, multilayers of biotinylated ureases (BU) were asymmetrically immobilized on biotinylated Janus Au/magnetic microparticles (MMPs) with the assistance of streptavidin (SA). When the mass ratio of BU into SA and the amount of BU used in the assembly process are increased, the amount of urease immobilized on the biotinylated Janus Au/MMPs increased monotonously while the migration speed of the micromotor was augmented gradually until a saturated value. The as-optimized micromotors can be self-propelled with an average speed up to about 21.5 ± 0.8 μm/s at physiological urea concentrations (10 mM), which is five times faster than that of the monolayered counterparts and two times faster than that of the previously reported values. Owing to the enhanced thrust, the micromotors can move in liquids with viscosities similar to that of blood. In addition, with the inherent magnetic property of MMPs, the micromotors can exhibit fast magnetic separation and controllable motion direction by external magnetic fields. Our results provide a new pathway for designing high-efficient enzyme-powered micro/nanomotors and thereby promote their biomedical applications.
研究领域:
生物医学工程
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）