Ignition and combustion analysis of direct write fabricated aluminum/metal oxide/PVDF films

Rehwoldt, Miles C.; Wang, Haiyang; Kline, Dylan J.; Wu, Tao; Eckman, Noah; Wang, Peng; Agrawal, Niti R; Zachariah, Michael R.

doi:10.1016/j.combustflame.2019.08.023

Cited by 45 publications

(21 citation statements)

References 25 publications

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“…Most of the recent works devoted to the use of FDM for the creation of HEM products are focused on the use of poly (vinylidene fluoride) (PVDF), which can serve both as a filament backbone in printing and as an oxidizing agent during the reaction [ 34 , 35 , 36 , 37 ]. In particular, nano-aluminum (n-Al) and polyvinylidene fluoride (PVDF) are attractive fuel and oxidizing materials due to the high energy density of n-Al as well as high oxidation potential and excellent mechanical properties offered by PVDF [ 38 ].…”

Section: High-energy Composite Additive Manufacturing Technologiesmentioning

confidence: 99%

Review of the Problems of Additive Manufacturing of Nanostructured High-Energy Materials

et al. 2021

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This article dwells upon the additive manufacturing of high-energy materials (HEM) with regards to the problems of this technology’s development. This work is aimed at identifying and describing the main problems currently arising in the use of AM for nanostructured high-energy materials and gives an idea of the valuable opportunities that it provides in the hope of promoting further development in this area. Original approaches are proposed for solving one of the main problems in the production of nanostructured HEM—safety and viscosity reduction of the polymer-nanopowder system. Studies have shown an almost complete degree of deagglomeration of microencapsulated aluminum powders. Such powders have the potential to create new systems for safe 3D printing using high-energy materials.

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Section: High-energy Composite Additive Manufacturing Technologiesmentioning

confidence: 99%

Review of the Problems of Additive Manufacturing of Nanostructured High-Energy Materials

et al. 2021

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“…To avoid problems associated with the agglomeration of Al, recent efforts have focused on the addition of fluorine-containing polymers to Al powders [ 13 , 14 , 15 ]. The oxidation reaction of Al-fluorine has a higher energy density than that of Al-oxygen [ 14 ].…”

Section: Introductionmentioning

confidence: 99%

Influence of Fluorinated Polyurethane Binder on the Agglomeration Behaviors of Aluminized Propellants

Shen

Yan

et al. 2022

Polymers

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In this study, fluorinated polyurethane (FPU) was prepared from dialcohol-terminated perfluoropolyether as a soft segment; isophorone diisocyanate (IPDI) as a curing agent; 1,2,4-butanetriol (BT) as a crosslinker; and 1,4-butanediol (BDO) as a chain extender. Fourier transform infrared spectroscopy (FTIR) and 1H NMR were used to characterize the structure of the FPU. The mechanical properties of the FPUs with different BDO and BT contents were also measured. The tensile strength and breaking elongation of the optimized FPU formula were 3.7 MPa and 412%, respectively. To find out the action mechanism of FPU on Al, FPU/Al was prepared by adding Al directly to FPU. The thermal decomposition of the FPU and FPU/Al was studied and compared by simultaneous differential scanning calorimetry-thermogravimetry-mass spectrometry (DSC-TG-MS). It was found that FPU can enhance the oxidation of Al by altering the oxide-shell properties. The combustion performance of the FPU propellant, compared with the corresponding hydroxyl-terminated polyether (HTPE)-based polyurethane (HPU) propellant, was recorded by a high-speed video camera. The FPU propellants were found to produce smaller agglomerates due to the generation of AlF3 in the combustion process. These findings show that FPU may be a useful binder for tuning the agglomeration and reducing two-phase flow losses of aluminized propellants.

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“…[39,40] Due to the complexity of fluoropolymer reaction in microsize, the specific reaction mechanism of the Al-F reaction is still under study. [41] Padhye et al [42] modeled aluminum-fluorine The development of 3D printing technology provides a new idea for the application of energy-containing materials as functional reactive materials, which helps Al-F high-energy materials to achieve customized performance and structure, so that energy transmit can be targeted. A high fuel-load ink (up to 90 wt%) based on Al-polytetrafluoroethylene (PTFE) is designed and fabricated using fluororubber (FR) as a binder.…”

Section: Introductionmentioning

confidence: 99%

“…Due to the complexity of fluoropolymer reaction in microsize, the specific reaction mechanism of the Al–F reaction is still under study. [ 41 ] Padhye et al [ 42 ] modeled aluminum–fluorine reaction mechanisms to explain the influence of the shell (Al 2 O 3 ) to aluminum–fluorine surface reaction. Conner and Dlott researched the reaction mechanism by comparing Al/Teflon and B/Teflon.…”

Section: Introductionmentioning

confidence: 99%

3D Printing of n‐Al/Polytetrafluoroethylene‐Based Energy Composites with Excellent Combustion Stability

Zheng

Huang

et al. 2021

Adv Eng Mater

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The development of 3D printing technology provides a new idea for the application of energy‐containing materials as functional reactive materials, which helps Al–F high‐energy materials to achieve customized performance and structure, so that energy transmit can be targeted. A high fuel‐load ink (up to 90 wt%) based on Al‐polytetrafluoroethylene (PTFE) is designed and fabricated using fluororubber (FR) as a binder. The content of FR is directly related to the mechanical properties of ink, and the customized structure from the uniform and stable deposition can be obtained by adjusting the content of FR (10–20 wt%). Under the display of high‐speed photography, the ink shows a strong stability in combustion performance, which is conducive to realize the performance customization of the ink in the application. To better understand the combustion mechanism, the thermal properties and combustion process are analyzed in brief through thermal analysis and the combustion snapshots.

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Ignition and combustion analysis of direct write fabricated aluminum/metal oxide/PVDF films

Cited by 45 publications

References 25 publications

Review of the Problems of Additive Manufacturing of Nanostructured High-Energy Materials

Review of the Problems of Additive Manufacturing of Nanostructured High-Energy Materials

Influence of Fluorinated Polyurethane Binder on the Agglomeration Behaviors of Aluminized Propellants

3D Printing of n‐Al/Polytetrafluoroethylene‐Based Energy Composites with Excellent Combustion Stability

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