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学者姓名：许培辉
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Abstract ：
Studying the ignition and combustion performances of modified aluminum-based metallic fuels in variable oxidizing atmospheres is highly important for large-scale space exploration. In this study, Al-B-Mg multi-metal composite powders (MMP) were prepared using the mechanical ball-milling method.It was coated respectively by ammonium perchlorate (AP), lithium perchlorate (LP), and potassium nitrate (KN) to obtain modified multi- metal composite powder fuels (AP@MMP, LP@MMP, and KN@MMP, respectively) by a recrystallization method. The samples were characterized and their thermal oxidation, ignition and combustion processes were investigated through a TG and laser-ignition experiment under Air/H2O environments. The results show that the MMP samples can potentially be called pure aluminum substitutes. All three samples exhibit fast ignition characteristics with ignition delay times of 2.95-6.75 ms in air. AP@MMP exhibits the highest ignition speed. The thermal oxidation, ignition, and combustion properties of all samples decayed with increasing water content in the atmosphere (Air -> Air+H2O -> H2O). AP@MMP exhibits a significantly more intense and stable combustion overall than LP@MMP and KN@MMP. This study expands the direction and application range of aluminum- based composite metal fuels, guiding their applications in Air/H2O environments.
Keyword ：
Air/H 2 O environments Air/H 2 O environments Aluminum Aluminum Coating modification Coating modification Multi-metal composite powder Multi-metal composite powder
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| GB/T 7714 | Zhang, Wenke , Xu, Peihui , Liang, Daolun et al. Thermal oxidation, ignition, and combustion characterization of AP-, LP-, and KN- coated multi-metal composite powders in Air/H2O environments [J]. | COMBUSTION AND FLAME , 2025 , 271 . |
| MLA | Zhang, Wenke et al. "Thermal oxidation, ignition, and combustion characterization of AP-, LP-, and KN- coated multi-metal composite powders in Air/H2O environments" . | COMBUSTION AND FLAME 271 (2025) . |
| APA | Zhang, Wenke , Xu, Peihui , Liang, Daolun , Liu, Jianzhong . Thermal oxidation, ignition, and combustion characterization of AP-, LP-, and KN- coated multi-metal composite powders in Air/H2O environments . | COMBUSTION AND FLAME , 2025 , 271 . |
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Aluminum-lithium (Al–Li) alloys are crafted by incorporating minute quantities of Li into Al, thereby alleviating the passivation effect of dense alumina. This strategic blend elevates the energy release potential of Al-based fuels by enhancing reactivity and facilitating efficient combustion reactions. The effects of Li content and particle size on the combustion characteristics of Al–Li alloys are systematically investigated, with a particular focus on several pivotal aspects: thermal oxidation behavior, ignition delay time, combustion time, combustion intensity, temperature, and the condensed-phase products. The results show that, upon heating to 1500°C, the oxidation weight gain of Al–Li alloys reaches 6.5 times that of raw Al. This indicates that adding Li significantly enhances the extent of the oxidation reaction. Increased Li content and particle size reduction further accelerate the oxidation reaction. The ignition delay time and combustion time are effectively shortened, showing a more intense combustion process, higher flame temperature and more significant micro-explosion effect. Ultimately, these factors lead to a significant reduction in the size of condensed-phase products. Based on these insights, a comprehensive impact mechanism for the energy release of Al–Li alloys has been proposed, providing theoretical guidance for applying Al–Li alloys in related fields. © 2025 Elsevier Ltd
Keyword ：
Al–Li alloy Al–Li alloy Combustion mechanism Combustion mechanism Li content Li content Particle size Particle size Thermal decomposition Thermal decomposition
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| GB/T 7714 | Gao, H. , Liu, J. , Xu, P. et al. Effects of Li content and particle size on the thermal decomposition and combustion characteristics of Al–Li alloys [J]. | Fuel , 2025 , 397 . |
| MLA | Gao, H. et al. "Effects of Li content and particle size on the thermal decomposition and combustion characteristics of Al–Li alloys" . | Fuel 397 (2025) . |
| APA | Gao, H. , Liu, J. , Xu, P. , Wang, H. , Fan, J. . Effects of Li content and particle size on the thermal decomposition and combustion characteristics of Al–Li alloys . | Fuel , 2025 , 397 . |
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Incorporating outstanding flame retardancy and electromagnetic interference shielding effectiveness (EMI SE) into polymers is a pressing requirement for practical utilization. In this study, we first employed the principles of microencapsulation and electrostatic interaction-driven self-assembly to encapsulate polyethyleneimine (PEI) molecules and Ti3C2Tx nanosheets on the surface of ammonium polyphosphate (APP), forming a double-layer-encapsulated structure of ammonium polyphosphate (APP@PEI@Ti3C2Tx). Subsequently, flame-retardant thermoplastic polyurethane (TPU) composites were fabricated by melting the flame-retardant agent with TPU. Afterwards, by using air-assisted thermocompression technology, we combined a reduced graphene oxide (rGO) film with flame-retardant TPU composites to fabricate hierarchical TPU/APP@PEI@Ti3C2Tx/rGO composites. We systematically studied the combustion behavior, flame retardancy, and smoke-suppression performance of these composite materials, as well as the flame-retardant mechanism of the expansion system. The results indicated a significant improvement in the interface interaction between APP@PEI@Ti3C2Tx and the TPU matrix. Compared to pure TPU, the TPU/10APP@PEI@1TC composite exhibited reductions of 84.1%, 43.2%, 62.4%, and 85.2% in peak heat release rate, total heat release, total smoke release, and total carbon dioxide yield, respectively. The averaged EMI SE of hierarchical TPU/5APP@PEI@1TC/rGO also reached 15.53 dB in the X-band.
Keyword ：
electromagnetic shielding electromagnetic shielding flame retardancy flame retardancy self-assembly self-assembly thermoplastic polyurethane thermoplastic polyurethane
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| GB/T 7714 | Liu, Yan , Yao, Ansheng , Fu, Libi et al. Construction of Fire Safe Thermoplastic Polyurethane/Reduced Graphene Oxide Hierarchical Composites with Electromagnetic Interference Shielding [J]. | MOLECULES , 2024 , 29 (13) . |
| MLA | Liu, Yan et al. "Construction of Fire Safe Thermoplastic Polyurethane/Reduced Graphene Oxide Hierarchical Composites with Electromagnetic Interference Shielding" . | MOLECULES 29 . 13 (2024) . |
| APA | Liu, Yan , Yao, Ansheng , Fu, Libi , Xie, Shiwei , Zhang, Yijie , Xu, Peihui et al. Construction of Fire Safe Thermoplastic Polyurethane/Reduced Graphene Oxide Hierarchical Composites with Electromagnetic Interference Shielding . | MOLECULES , 2024 , 29 (13) . |
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Polymeric materials usually present substantial hazards to human health and the environment as a consequence of their flammability which leads to the emission of a great deal of heat and toxic fumes. To address this issue, it is imperative to urgently enhance the flame retardancy of polymer materials. This study focuses on the synthesis of a novel gel-silica/polydopamine double-layer microencapsulated cobalt ions (Co2+) modified ammonium polyphosphate (APP-Co@PDA@Si) and its utilization in thermoplastic polyurethane (TPU) composites. The resulting TPU composite, containing 10.0 wt% APP-Co@PDA@Si, exhibited excellent flame-retardant properties, i.e. achieving a limiting oxygen index of 30.0 % and the V-0 grade in the UL-94 test. Furthermore, peak heat release rate, total heat release, peak smoke production rate, and total smoke release of the TPU composite were decreased by 88.51 %, 66.06 %, 61.73 %, and 74.01 %, respectively, in comparison to those of pure TPU. The enhanced fire safety of the TPU composite was attributed to the synergistic effect among Co2+ catalytic carbonization, the free radicals capture effect of APP, and the flame-retardant functions of PDA and silane. This innovative strategy proposed in this work holds great promise for improving the fire-resistance of TPU.
Keyword ：
Core-shell structure Core-shell structure Multi-component flame retardant Multi-component flame retardant Smoke suppression Smoke suppression Synergistic function Synergistic function Thermoplastic polyurethane Thermoplastic polyurethane
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| GB/T 7714 | Zhu, Yanjun , Wang, Hengrui , Fu, Libi et al. Interface engineering of multi-component core-shell flame retardant towards enhancing fire safety of thermoplastic polyurethane and mechanism investigation [J]. | APPLIED MATERIALS TODAY , 2024 , 38 . |
| MLA | Zhu, Yanjun et al. "Interface engineering of multi-component core-shell flame retardant towards enhancing fire safety of thermoplastic polyurethane and mechanism investigation" . | APPLIED MATERIALS TODAY 38 (2024) . |
| APA | Zhu, Yanjun , Wang, Hengrui , Fu, Libi , Xu, Peihui , Rao, Guanjie , Xiao, Wei et al. Interface engineering of multi-component core-shell flame retardant towards enhancing fire safety of thermoplastic polyurethane and mechanism investigation . | APPLIED MATERIALS TODAY , 2024 , 38 . |
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The ignition and combustion behaviors of single-particle aluminum in a water vapor environment are among the most important basic research aspects of metal fuels and solid propulsion technologies. In this paper, the ignition and combustion behaviors of aluminum particles in a water vapor environment were modeled based on a traditional aluminum particle ignition model and the finite difference method. In addition, a metal single-particle ignition combustion test system was used to carry out relevant validation experiments. The validation results showed that the average error of the model remained within 10%. In addition, an initial oxide layer fusion module was established in conjunction with the results of a material mechanics study of Al/Al2O3. Moreover, the model was used to calculate the ignition behavioral parameters (ignition delay time and ignition temperature) of the aluminum particles under different initial parameters. Finally, an intrinsic mechanism model was created to evaluate the influences of the relevant parameters on the ignition behaviors of the aluminum particles. The model results showed that the initial oxide layer ruptured during the aluminum melting stage, the phase transition stress was the main factor leading to oxide layer rupture, the ambient temperature had a great influence on the ignition temperature, and all four initial parameters were negatively correlated with the ignition delay time.
Keyword ：
Aluminum-water reaction Aluminum-water reaction Ignition and combustion Ignition and combustion Initial oxide layer Initial oxide layer Melting and swelling Melting and swelling Single-particle aluminum Single-particle aluminum
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| GB/T 7714 | Zhang, Wenke , Liu, Jianzhong , Xu, Peihui et al. Predictive model for the ignition and combustion behaviors of micron-sized aluminum particles in a water vapor environment [J]. | JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY , 2024 , 149 (15) : 8017-8026 . |
| MLA | Zhang, Wenke et al. "Predictive model for the ignition and combustion behaviors of micron-sized aluminum particles in a water vapor environment" . | JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY 149 . 15 (2024) : 8017-8026 . |
| APA | Zhang, Wenke , Liu, Jianzhong , Xu, Peihui , Gao, Huanhuan . Predictive model for the ignition and combustion behaviors of micron-sized aluminum particles in a water vapor environment . | JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY , 2024 , 149 (15) , 8017-8026 . |
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The potential of the Al-F reaction in suppressing agglomeration during propellant combustion and enhancing combustion performance is investigated by introducing fluorinated graphene as a fluorinated oxidizer. Comparative analyses of ignition combustion and agglomeration behaviors are conducted on novel composite powders and propellant samples modified with varying contents of fluorinated graphene using laser and hot wire ignition visualization systems. Characterizing parameters such as characteristic spectra, flame grayscale, ignition delay time, combustion duration, and burning rate are measured during combustion at different pressures. Additionally, agglomerated particles are collected via quenching techniques under 7 MPa pressure to explore the influence mechanism of fluorinated graphene on agglomeration near the burning surface, and a comprehensive influence mechanism is proposed. Results indicate that fluorinated graphene promotes ammonium perchlorate decomposition, accelerates oxidizing gas release, and enhances thermal conduction at the burning surface. The reaction between Al and F decreases the formation of intermediates (AlO and Al2O), while the interaction of F with Al and Al2O3 effectively inhibits the clustering of Al particles, replacing conventional oxidation reactions and resulting in a unique micro-explosion jetting phenomenon. The introduction of 15 % fluorinated graphene concentrates most product particles around 10 mu m, enhancing energy release during combustion. Overall, this composite powder containing fluorinated graphene effectively improves the combustion performance of aluminum-containing composite propellants, inhibiting Al particle agglomeration and potentially reducing specific impulse loss in solid rocket motors.
Keyword ：
Agglomeration Agglomeration Combustion Combustion Fluorinated graphene Fluorinated graphene Micro-explosion Micro-explosion Solid rocket motor Solid rocket motor
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| GB/T 7714 | Gao, Huanhuan , Liu, Hui , Xu, Peihui et al. Micro-explosion-induced combustion and agglomeration characteristics in composite propellants with fluorinated graphene [J]. | ACTA ASTRONAUTICA , 2024 , 225 : 489-502 . |
| MLA | Gao, Huanhuan et al. "Micro-explosion-induced combustion and agglomeration characteristics in composite propellants with fluorinated graphene" . | ACTA ASTRONAUTICA 225 (2024) : 489-502 . |
| APA | Gao, Huanhuan , Liu, Hui , Xu, Peihui , Liu, Jianzhong . Micro-explosion-induced combustion and agglomeration characteristics in composite propellants with fluorinated graphene . | ACTA ASTRONAUTICA , 2024 , 225 , 489-502 . |
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Rigid polyurethane foam (RPUF) shows great application potential in the fields of architecture, household, and transportation due to its lightweight, durability, and excellent heat insulation. However, it remains challenging to construct flame-retardant and impact-resistant RPUF composites with good thermal insulation through a facile approach. Herein, multifunctional hierarchical RPUF composites were prepared by simple one-pot foaming and brush-coating methods. Due to the hierarchical structure and multifunctional polyborosiloxane/phytic acid/polyethylenimine (PBS/PAP) coating, the as-created foams displayed excellent fire safety and impact resistance. For instance, the peak of heat release rate and total heat release of the RPUF composite with the PBS/PAP coating decreased by 70.1 and 57.0%, respectively, relative to those of pure RPUF. Furthermore, the composite showed good heat insulation and improved thermal stability performance. This work offers a paradigm for the design of multifunctional RPUF composites with outstanding fire resistance, impact resistance, and heat insulation properties, which represent prospective potential in safety protective materials.
Keyword ：
fire safety fire safety hierarchical structure hierarchical structure impact resistance impact resistance rigid polyurethane foam rigid polyurethane foam thermal insulation thermal insulation
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| GB/T 7714 | Liu, Miao , Huang, Ruizhe , Shi, Yongqian et al. Fabrication of Fire-Retardant and Impact-Resistant Hierarchical Rigid Porous Composites via Surface Coating Strategy [J]. | ACS APPLIED POLYMER MATERIALS , 2024 , 6 (12) : 7254-7264 . |
| MLA | Liu, Miao et al. "Fabrication of Fire-Retardant and Impact-Resistant Hierarchical Rigid Porous Composites via Surface Coating Strategy" . | ACS APPLIED POLYMER MATERIALS 6 . 12 (2024) : 7254-7264 . |
| APA | Liu, Miao , Huang, Ruizhe , Shi, Yongqian , Xu, Peihui , Xie, Shiwei , Fu, Libi et al. Fabrication of Fire-Retardant and Impact-Resistant Hierarchical Rigid Porous Composites via Surface Coating Strategy . | ACS APPLIED POLYMER MATERIALS , 2024 , 6 (12) , 7254-7264 . |
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Aiming at the demand for improving the heat release performance of solid propellants for high energy and complex practical application scenarios, the B-Mg-Al ternary alloy is proposed as a metal fuel additive. Based on the unique phase distribution of B-Mg-Al ternary metal alloy and the existing theory of ignition and combustion of metal particles, the kinetic simulation of ignition and combustion of B-Mg-Al ternary metal alloy particles in complex alternating atmosphere is carried out by combining with the virtual alternating atmosphere environment. The model calculates the combustion time tc of 10 mu m B-Mg-Al alloy particles in H2O(g), H2O(g)/Air alternating mode, and Air to be 3.50 ms, 3.98 ms, and 4.60 ms, respectively, and the comparative errors with the experimental measurement of combustion time are kept around 5%, which verifies the reliability of the model results. The simulation study shows that the order of thermal oxidation reaction and the order of combustion of the monomolecular group elements of B-Mg-Al ternary alloy particles are Mg, Al, and B, which to some extent indicates that the addition of Mg and Al has the potential to improve the ignition and combustion performance of B. In addition, there are obvious differences in the ignition and combustion performance and heat transfer performance of the alloy particles under H2O(g) and that of Air with the same concentration, which leads to significant instability in both ignition and combustion processes at variable medium.
Keyword ：
Alternating atmosphere Alternating atmosphere Single particle Single particle Ternary alloy Ternary alloy Thermal oxidation Thermal oxidation
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| GB/T 7714 | Zhang, Wenke , Liu, Jianzhong , Xu, Peihui et al. Thermal oxidation kinetic simulation of ignition and combustion of B-Mg-Al ternary metal alloy particles in alternating atmosphere [J]. | JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY , 2024 , 149 (23) : 13799-13811 . |
| MLA | Zhang, Wenke et al. "Thermal oxidation kinetic simulation of ignition and combustion of B-Mg-Al ternary metal alloy particles in alternating atmosphere" . | JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY 149 . 23 (2024) : 13799-13811 . |
| APA | Zhang, Wenke , Liu, Jianzhong , Xu, Peihui , Zhang, Yanwen . Thermal oxidation kinetic simulation of ignition and combustion of B-Mg-Al ternary metal alloy particles in alternating atmosphere . | JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY , 2024 , 149 (23) , 13799-13811 . |
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Developing a flame retardant and puncture resistant nylon 6 (PA6) film composite with excellent gas barrier property as a food packaging material is still a great challenge. Herein, microencapsulation and hydrogenbonding interaction were adopted to synthesize a multifunctional additive (SiO2@CS@GO-S), which simultaneously improved the mechanical, gas barrier and flame retardant performances of PA6 film. The obtained results indicated that the gas barrier property of the as -prepared PA6 film composite containing 0.1 wt% SiO2@CS@GO-S (PA6/SiO2@CS@GO-S-0.1) was obviously improved. For instance, the oxygen transmission rate of the film composite decreased dramatically by 52.0% compared with that of PA6 film. Furthermore, the puncture resistance of the PA6/SiO2@CS@GO-S-0.1 markedly increased from 18.3 N of PA6 to 25.3 N. Additionally, both thermal stability and fire safety of the PA6/SiO2@CS@GO-S film composites were enhanced. The peak of heat release rate and total smoke release of the PA6/SiO2@CS@GO-S-0.1 were reduced by 10.7% and 19.3%, respectively, compared to those of PA6 film. This work provides a new paradigm for creating a multifunctional PA6 film composite with high performance for grain preservation and loss reduction.
Keyword ：
Fire safety Fire safety Gas barrier property Gas barrier property Nylon 6 film composite Nylon 6 film composite Puncture resistance Puncture resistance
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| GB/T 7714 | Liu, Miao , Qiu, Yitong , Shi, Yongqian et al. Fabrication of flame retardant nylon 6 film composites with superior gas barrier property and puncture resistance [J]. | COMPOSITES COMMUNICATIONS , 2024 , 47 . |
| MLA | Liu, Miao et al. "Fabrication of flame retardant nylon 6 film composites with superior gas barrier property and puncture resistance" . | COMPOSITES COMMUNICATIONS 47 (2024) . |
| APA | Liu, Miao , Qiu, Yitong , Shi, Yongqian , Qiu, Yijuan , Xu, Peihui , Chen, Xi . Fabrication of flame retardant nylon 6 film composites with superior gas barrier property and puncture resistance . | COMPOSITES COMMUNICATIONS , 2024 , 47 . |
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Overcoming the difficulty of ignition and combustion of aluminium in water vapour is the key to being applied in underwater propellant applications. The effect of coating or blending 20 mass% ammonium perchlorate (namely, AP@Al or AP-Al samples) on the ignition and combustion of Al particles in a 1.0 MPa water vapour-Ar environment was investigated using a constant temperature pressurized combustion chamber and a CO2 laser. The results show that the combustion of Al particles in a water vapour-Ar environment is a non-homogeneous reaction and that agglomeration processes of Al droplets are observed. The ignition and combustion properties of the AP@Al and AP-Al samples under water vapour were greatly improved due to the decomposition of AP for heat/oxygen (particularly, O2 provided a new pathway for AlO(g) generation) supply and the effect of dispersed particles. The maximum pressure change and combustion temperature (Tmax) were increased significantly for the AP@Al and AP-Al samples combustion, while their ignition delay time (ti) and combustion time (tc) decreased remarkably. In addition, the coating form is more effective in the combustion-promoting effect of AP than the blending form. Interestingly, the increase in water vapour concentration is not conducive to the ignition and combustion of samples in this work. It is probably because the reaction system is lean-fuel where the excess water vapour absorbs some of the heat and prevents effective collisions among the radicals. In addition, the chemical equilibrium largely influences the combustion temperature, resulting in a conspicuous effect of changes in water vapour concentration on the Tmax values. The reaction interface largely influences the combustion reaction rate of Al, so changes in particle size have a significant effect on the ti and tc values.
Keyword ：
Aluminium Aluminium Ammonium perchlorate Ammonium perchlorate Modification Modification Underwater propulsion Underwater propulsion Water vapour Water vapour
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| GB/T 7714 | Xu, Peihui , Dong, Xingang , Zhang, Wenke et al. Effect of AP coating or blending on the ignition and combustion of Al particles under a high-pressure water vapour-Ar environment [J]. | COMBUSTION AND FLAME , 2024 , 263 . |
| MLA | Xu, Peihui et al. "Effect of AP coating or blending on the ignition and combustion of Al particles under a high-pressure water vapour-Ar environment" . | COMBUSTION AND FLAME 263 (2024) . |
| APA | Xu, Peihui , Dong, Xingang , Zhang, Wenke , Yang, Yuxin , Liao, Xueqin , Liu, Jianzhong . Effect of AP coating or blending on the ignition and combustion of Al particles under a high-pressure water vapour-Ar environment . | COMBUSTION AND FLAME , 2024 , 263 . |
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