Improvement of ignition and combustion performance of micro-aluminum particles by double-shell nickel-phosphorus alloy coating

Wang, Chao; Zou, Xiangrui; Yin, Shipan; Wang, Junlong; HongYang, Li; Liu, Ying; Wang, Ningfei; Shi, Baolu

doi:10.1016/j.cej.2021.133585

Cited by 7 publications

(9 citation statements)

References 42 publications

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“…Some burning particles exhibit a microexplosion phenomenon (Figure S4), which was observed previously with laser-ignited Al particles. 18 The minimum ignition energy increases in the order of nAl/GF, nAl/CFGO, nAl/GO, and nAl (Figure 4b), implying that the F plays the dominant role in reducing the ignition threshold of nAl while the peak pressure decreases in the order of nAl/CFGO, nAl/GO, nAl/GF, and nAl (Figure 4b). Together, nAl/CFGO exhibits relatively low ignition energy and the highest and fastest pressure rise among all the samples (Figure 4b).…”

Section: Resultsmentioning

confidence: 96%

“…For nAl/CFGO, the supplementary video shows that burning particles are ejected with smoke generation. Some burning particles exhibit a microexplosion phenomenon (Figure S4), which was observed previously with laser-ignited Al particles . The minimum ignition energy increases in the order of nAl/GF, nAl/CFGO, nAl/GO, and nAl (Figure b), implying that the F plays the dominant role in reducing the ignition threshold of nAl while the peak pressure decreases in the order of nAl/CFGO, nAl/GO, nAl/GF, and nAl (Figure b).…”

Section: Resultsmentioning

confidence: 99%

“…First, some additives release heat through reactions before Al ignition, leading to stressed Al surface and facilitating mass transport of Al and/or O through the native oxide shell. 18 Second, some additives release fluorine-containing species that react with the native Al 2 O 3 shell and/or newly formed Al 2 O 3 , exposing more active Al for oxidation and leading to faster and more complete combustion. 32−34 Finally, some additives, such as metal− organic framework and nitrocellulose, release gaseous products before Al ignition or during Al combustion, which help to break up the aggregates of metal particles or condensed-phase combustion products.…”

mentioning

confidence: 91%

“…Incorporation of additives to Al is an effective approach to address the above-mentioned challenges. Various additives, such as metals (e.g., nickel, titanium), − metal oxides, (e.g., copper oxide), − energetic polymers (e.g., metal–organic framework), − fluoropolymers (e.g., polytetrafluoroethylene (PTFE)), − metal fluorides (e.g., nickel fluoride), and carbon nanomaterials (e.g., functionalized graphene), ,− have been reported to promote the ignition and/or combustion of Al by providing at least one of the following benefits. First, some additives release heat through reactions before Al ignition, leading to stressed Al surface and facilitating mass transport of Al and/or O through the native oxide shell .…”

mentioning

confidence: 99%

“…Various additives, such as metals (e.g., nickel, titanium), − metal oxides, (e.g., copper oxide), − energetic polymers (e.g., metal–organic framework), − fluoropolymers (e.g., polytetrafluoroethylene (PTFE)), − metal fluorides (e.g., nickel fluoride), and carbon nanomaterials (e.g., functionalized graphene), ,− have been reported to promote the ignition and/or combustion of Al by providing at least one of the following benefits. First, some additives release heat through reactions before Al ignition, leading to stressed Al surface and facilitating mass transport of Al and/or O through the native oxide shell . Second, some additives release fluorine-containing species that react with the native Al 2 O 3 shell and/or newly formed Al 2 O 3 , exposing more active Al for oxidation and leading to faster and more complete combustion. − Finally, some additives, such as metal–organic framework and nitrocellulose, release gaseous products before Al ignition or during Al combustion, which help to break up the aggregates of metal particles or condensed-phase combustion products. − …”

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confidence: 99%

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Perfluoroalkyl-Functionalized Graphene Oxide as a Multifunctional Additive for Promoting the Energetic Performance of Aluminum

et al. 2022

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Aluminum (Al) is a widely used metal fuel for energetic applications ranging from space propulsion and exploration, and materials processing, to power generation for nano- and microdevices due to its high energy density and earth abundance. Recently, the ignition and combustion performance of Al particles were found to be improved by graphene-based additives, such as graphene oxide (GO) and graphene fluoride (GF), as their reactions provide heat to accelerate Al oxidation, gas to reduce particle agglomeration, and fluorine-containing species to remove Al2O3. However, GF is not only expensive but also hydrophobic with poor mixing compatibility with Al particles. Herein, we report a multifunctional graphene-based additive for Al combustion, i.e., perfluoroalkyl-functionalized graphene oxide (CFGO), which integrates the benefits of GO and GF in one material. We compared the effects of CFGO to GO and GF on the ignition and combustion properties of nAl particles using thermogravimetric analysis, differential scanning calorimetry, temperature-jump ignition), Xe flash ignition, and constant-volume combustion test. These experiments confirm that CFGO generates fluorine-containing species, heat, and gases, which collectively lower the ignition threshold, augment the energy release rate, and reduce the combustion product agglomeration of nanosized Al particles, outperforming both GO and GF as additives. This work shows the great potential of using multifunctionalized graphene as an integrated additive for enhancing the ignition and combustion of metals.

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Section: Resultsmentioning

confidence: 96%

Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 91%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Perfluoroalkyl-Functionalized Graphene Oxide as a Multifunctional Additive for Promoting the Energetic Performance of Aluminum

et al. 2022

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High‐Performance Aluminum Fuels Induced by Monolayer Self‐Assembly of Nano‐Sized Energetic Fluoride Vesicles on the Surface

Wang,

Zhang,

et al. 2024

Advanced Science

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Surface modification is frequently used to solve the problems of low combustion properties and agglomeration for aluminum‐based fuels. However, due to the intrinsic incompatibility between the aluminum powder and the organic modifiers, the surface coating is usually uneven and disordered, which significantly deteriorates the uniformity and performances of the Al‐based fuels. Herein, a new approach of monolayer nano‐vesicular self‐assembly is proposed to prepare high‐performance Al fuels. Triblock copolymer G‐F‐G is produced by glycidyl azide polymer (GAP) and 2,2′‐(2,2,3,3,4,5,5‐Octafluorohexane‐1,6‐diyl) bis (oxirane) (fluoride) ring‐open addition reaction. By utilizing G‐F‐G vesicular self‐assembly in a special solvent, the nano‐sized vesicles are firmly adhered to the surface of Al powder through the long‐range attraction between the fluorine segments and Al. Meanwhile, the electrostatic repulsion between vesicles ensures an extremely thin coating thickness (≈15 nm), maintaining the monolayer coating structure. Nice ignition, combustion, anti‐agglomeration, and water‐proof properties of Al@G‐F‐G(DMF) are achieved, which are superior among the existing Al‐based fuels. The derived Al‐based fuel has excellent comprehensive properties, which can not only inspire the development of new‐generation energetic materials but also provide facile but exquisite strategies for exquisite surface nanostructure construction via ordered self‐assembly for many other applications.

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A new fluorocarbon adhesive: Inhibiting agglomeration during combustion of propellant via efficient F–Al₂O₃ preignition reaction

Yao,

Xia,

Wang

et al. 2024

Carbon Energy

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Inhibiting the agglomeration of molten aluminum particles packed in the binder network is a promising scheme to achieve efficient combustion of solid propellants. In this investigation, the hydroxyl‐terminated structured fluorinated alcohol compound (PFD) was introduced to modify the traditional polyethylene glycol/polytetrahydrofuran block copolymerization (HTPE) binder; that is, a unique fluorinated polyether (FTPE) binder was synthesized by embedding fluorinated organic segments into the HTPE binder via crosslinking curing. The FTPE was applied in aluminum‐based propellants for the first time. Due to the complete release of fluorinated organic active segments in the range of 300°C to 400°C, the burning rate of FTPE‐based propellant increased from 4.07 (0% PFD) to 6.36 mm/s (5% PFD), increased by 56.27% under 1 MPa. The reaction heat of FTPE propellants increased from 5.95 (0% PFD) to 7.18 MJ/kg (5% PFD) under 3.0 MPa, indicating that HTPE binder modified with PFD would be conducive to inhibiting the D90 of condensed combustion products (CCPs) dropped by 81.84% from 75.46 (0% PFD) to 13.71 μm (5% PFD) under 3.0 MPa, in consistent with the significant reduction of aluminum agglomerates observed on the quenched burning surface of the propellants. Those results demonstrated that a novel FTPE binder with PFD can release fluorinated organic active segments, which motivate preignition reaction with the alumina shell in the early stage of aluminum combustion, and then enhance the melting diffusion effect of aluminum to inhibit the agglomeration.

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Improvement of ignition and combustion performance of micro-aluminum particles by double-shell nickel-phosphorus alloy coating

Cited by 7 publications

References 42 publications

Perfluoroalkyl-Functionalized Graphene Oxide as a Multifunctional Additive for Promoting the Energetic Performance of Aluminum

Perfluoroalkyl-Functionalized Graphene Oxide as a Multifunctional Additive for Promoting the Energetic Performance of Aluminum

High‐Performance Aluminum Fuels Induced by Monolayer Self‐Assembly of Nano‐Sized Energetic Fluoride Vesicles on the Surface

A new fluorocarbon adhesive: Inhibiting agglomeration during combustion of propellant via efficient F–Al₂O₃ preignition reaction

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Improvement of ignition and combustion performance of micro-aluminum particles by double-shell nickel-phosphorus alloy coating

Cited by 7 publications

References 42 publications

Perfluoroalkyl-Functionalized Graphene Oxide as a Multifunctional Additive for Promoting the Energetic Performance of Aluminum

Perfluoroalkyl-Functionalized Graphene Oxide as a Multifunctional Additive for Promoting the Energetic Performance of Aluminum

High‐Performance Aluminum Fuels Induced by Monolayer Self‐Assembly of Nano‐Sized Energetic Fluoride Vesicles on the Surface

A new fluorocarbon adhesive: Inhibiting agglomeration during combustion of propellant via efficient F–Al2O3 preignition reaction

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A new fluorocarbon adhesive: Inhibiting agglomeration during combustion of propellant via efficient F–Al₂O₃ preignition reaction