The Experts below are selected from a list of 51 Experts worldwide ranked by ideXlab platform

Yue Jiang - One of the best experts on this subject based on the ideXlab platform.

  • facilitating laser ignition and Combustion of boron with a mixture of graphene oxide and graphite fluoride
    Applications in Energy and Combustion Science, 2020
    Co-Authors: Yue Jiang, Andrew R Demko, Jihyun Baek, Xinjian Shi, Lauren Vallez, Rui Ning, Xiaolin Zheng
    Abstract:

    Abstract Boron (B), with high energy density and low cost, is regarded as a promising fuel for energetic applications such as propellants. However, achieving efficient Combustion of B is challenging due to its delayed ignition and slow Combustion. Additives are needed to promote the ignition and Combustion of B particles by providing heat, gases, and/or fluorine-containing species. In this study, we demonstrated that a mixture of graphene oxide (GO) and graphite fluoride (GtF) is a new and effective additive for B particles. We compared the energetic performance of B/GO/GtF mixtures with B/GO, B/GtF, and B/PTFE in a laser ignition experiment. B/GO/GtF has the shortest ignition delay time, longest burning duration, and strongest BO2 emission among all four samples. This enhancement is caused by the synergistic properties of GO and GtF, which releases heat, gases, and fluorocarbon radicals to facilitate B ignition and Combustion. Our study suggests that the mixture of functionalized graphene and graphite materials can be a new class of promising additive for Metal Combustion and other energetic materials.

  • synergistically chemical and thermal coupling between graphene oxide and graphene fluoride for enhancing aluminum Combustion
    ACS Applied Materials & Interfaces, 2020
    Co-Authors: Yue Jiang, Sili Deng, Sungwook Hong, Subodh Tiwari, Haihan Chen, Kenichi Nomura, Rajiv K Kalia, Aiichiro Nakano
    Abstract:

    Metal Combustion reaction is highly exothermic and is used in energetic applications, such as propulsion, pyrotechnics, powering micro- and nano-devices, and nanomaterials synthesis. Aluminum (Al) is attracting great interest in those applications because of its high energy density, earth abundance, and low toxicity. Nevertheless, Al Combustion is hard to initiate and progresses slowly and incompletely. On the other hand, ultrathin carbon nanomaterials, such as graphene, graphene oxide (GO), and graphene fluoride (GF), can also undergo exothermic reactions. Herein, we demonstrate that the mixture of GO and GF significantly improves the performance of Al Combustion as interactions between GO and GF provide heat and radicals to accelerate Al oxidation. Our experiments and reactive molecular dynamics simulation reveal that GO and GF have strong chemical and thermal couplings through radical reactions and heat released from their oxidation reactions. GO facilitates the dissociation of GF, and GF accelerates t...

Aiichiro Nakano - One of the best experts on this subject based on the ideXlab platform.

  • synergistically chemical and thermal coupling between graphene oxide and graphene fluoride for enhancing aluminum Combustion
    ACS Applied Materials & Interfaces, 2020
    Co-Authors: Yue Jiang, Sili Deng, Sungwook Hong, Subodh Tiwari, Haihan Chen, Kenichi Nomura, Rajiv K Kalia, Aiichiro Nakano
    Abstract:

    Metal Combustion reaction is highly exothermic and is used in energetic applications, such as propulsion, pyrotechnics, powering micro- and nano-devices, and nanomaterials synthesis. Aluminum (Al) is attracting great interest in those applications because of its high energy density, earth abundance, and low toxicity. Nevertheless, Al Combustion is hard to initiate and progresses slowly and incompletely. On the other hand, ultrathin carbon nanomaterials, such as graphene, graphene oxide (GO), and graphene fluoride (GF), can also undergo exothermic reactions. Herein, we demonstrate that the mixture of GO and GF significantly improves the performance of Al Combustion as interactions between GO and GF provide heat and radicals to accelerate Al oxidation. Our experiments and reactive molecular dynamics simulation reveal that GO and GF have strong chemical and thermal couplings through radical reactions and heat released from their oxidation reactions. GO facilitates the dissociation of GF, and GF accelerates t...

Sili Deng - One of the best experts on this subject based on the ideXlab platform.

  • synergistically chemical and thermal coupling between graphene oxide and graphene fluoride for enhancing aluminum Combustion
    ACS Applied Materials & Interfaces, 2020
    Co-Authors: Yue Jiang, Sili Deng, Sungwook Hong, Subodh Tiwari, Haihan Chen, Kenichi Nomura, Rajiv K Kalia, Aiichiro Nakano
    Abstract:

    Metal Combustion reaction is highly exothermic and is used in energetic applications, such as propulsion, pyrotechnics, powering micro- and nano-devices, and nanomaterials synthesis. Aluminum (Al) is attracting great interest in those applications because of its high energy density, earth abundance, and low toxicity. Nevertheless, Al Combustion is hard to initiate and progresses slowly and incompletely. On the other hand, ultrathin carbon nanomaterials, such as graphene, graphene oxide (GO), and graphene fluoride (GF), can also undergo exothermic reactions. Herein, we demonstrate that the mixture of GO and GF significantly improves the performance of Al Combustion as interactions between GO and GF provide heat and radicals to accelerate Al oxidation. Our experiments and reactive molecular dynamics simulation reveal that GO and GF have strong chemical and thermal couplings through radical reactions and heat released from their oxidation reactions. GO facilitates the dissociation of GF, and GF accelerates t...

Sungwook Hong - One of the best experts on this subject based on the ideXlab platform.

  • synergistically chemical and thermal coupling between graphene oxide and graphene fluoride for enhancing aluminum Combustion
    ACS Applied Materials & Interfaces, 2020
    Co-Authors: Yue Jiang, Sili Deng, Sungwook Hong, Subodh Tiwari, Haihan Chen, Kenichi Nomura, Rajiv K Kalia, Aiichiro Nakano
    Abstract:

    Metal Combustion reaction is highly exothermic and is used in energetic applications, such as propulsion, pyrotechnics, powering micro- and nano-devices, and nanomaterials synthesis. Aluminum (Al) is attracting great interest in those applications because of its high energy density, earth abundance, and low toxicity. Nevertheless, Al Combustion is hard to initiate and progresses slowly and incompletely. On the other hand, ultrathin carbon nanomaterials, such as graphene, graphene oxide (GO), and graphene fluoride (GF), can also undergo exothermic reactions. Herein, we demonstrate that the mixture of GO and GF significantly improves the performance of Al Combustion as interactions between GO and GF provide heat and radicals to accelerate Al oxidation. Our experiments and reactive molecular dynamics simulation reveal that GO and GF have strong chemical and thermal couplings through radical reactions and heat released from their oxidation reactions. GO facilitates the dissociation of GF, and GF accelerates t...

Edward L Dreizin - One of the best experts on this subject based on the ideXlab platform.

  • Metal based reactive nanomaterials
    Progress in Energy and Combustion Science, 2009
    Co-Authors: Edward L Dreizin
    Abstract:

    Recent developments in materials processing and characterization resulted in the discovery of a new type of reactive materials containing nanoscaled Metal components. The well-known high oxidation energies of Metallic fuels can now be released very rapidly because of the very high reactive interface areas in such Metal-based reactive nanomaterials. Consequently, these materials are currently being examined for an entire range of applications in energetic formulations inappropriate for conventional, micron-sized Metal fuels having relatively low reaction rates. New application areas, such as reactive structural materials, are also being explored. Research remains active in manufacturing and characterization of Metal-based reactive nanomaterials including elemental Metal nanopowders and various nanocomposite material systems. Because of the nanometer scale of the individual particles, or phase domains, and because of the very high enthalpy of reaction between components of the nanocomposite materials, the final phase compositions, morphology, and thermodynamic properties of the reactive nanocomposite materials may be different from those of their micron-scaled counterparts. Ignition mechanisms in such materials can be governed by heterogeneous reactions that are insignificant for materials with less developed reactive interface areas. New Combustion regimes are being observed that are affected by very short ignition delays combined with very high Metal Combustion temperatures. Current progress in this rapidly growing research area is reviewed and some potential directions for the future research are discussed.

  • phase changes in Metal Combustion
    Progress in Energy and Combustion Science, 2000
    Co-Authors: Edward L Dreizin
    Abstract:

    Abstract This paper describes an expanded mechanism of Metal Combustion that emphasizes reactions and phase changes occurring within the burning Metal in addition to those occurring on and above the Metal surface. Selected recent experimental work showing the importance of these internal processes in Metal Combustion is surveyed. Gas dissolution within the burning Metal, ensuing phase changes, and their effects on Combustion are discussed. Metal–gas phase diagrams are used to interpret the experimentally observed Metal Combustion behavior. Some concepts aimed at designing improved Metal-based high energy density materials and controlling Metals flammability are briefly addressed.