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US 2025/0276902 A1Published application
Carbon Nanotube End Cap Impregnated Multifunctional Catalyst
OwnerMichael Gurininventor
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OwnerMichael Gurininventor
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A multifunctional end cap catalyst is provided, comprising a multi-wall carbon nanotube with a multi-metal catalyst at the end cap. The catalyst contributes preferentially to growing a multi-wall carbon nanotube through a methane pyrolysis process at a lower temperature, and then infuses the nanotube into a host material, such as concrete, asphalt, polymer, or steel, improving functional parameters including thermal conductivity, electrical conductivity, wettability, flexural strength, tensile strength, or interfacial bonding strength. The catalyst can also increase the host material's decrease phonon scattering or interfacial resistance, and lower the final defect density of the multi-wall carbon nanotube. The multifunctional end cap catalyst can be composed of various metals, including copper, nickel, and manganese, and can achieve specific functional states, such as oxidized or functionalized metal states, without increasing the final defect density.
A multifunctional end cap catalyst comprised of a multi-wall carbon nanotube having a multi-metal catalyst wherein the multi-wall carbon nanotube has an end cap and a length of the multi-wall carbon nanotube, the multi-metal catalyst having a location within the multi-wall carbon nanotube wherein the location of the multi-metal catalyst is within no greater than 5 percent of the length of the multi-wall carbon nanotube from the end cap of the multi-wall carbon nanotube, whereby the multi-metal catalyst contributes to a first process step wherein the first process step is to grow the multi-wall carbon nanotube from a methane pyrolysis process having a methane pyrolysis temperature lower than a multi-wall metal catalyst phase change temperature, whereby the multi-metal catalyst has an initial multi-metal mass during the methane pyrolysis process, whereby the multi-metal catalyst has a host multi-metal mass following the methane pyrolysis process whereby the host multi-metal mass is at least 5 percent of the initial multi-metal mass of the multi-metal catalyst, whereby the multi-metal catalyst lowers the methane pyrolysis temperature by a minimum of 200 degrees Celsius as compared to the methane pyrolysis temperature without the multi-metal catalyst, whereby the multi-metal catalyst contributes to an at least one next process step wherein the at least one next process step is to infuse the multi-wall carbon nanotube into a host material as a final process step whereby the final process step can be either an at least second process step prior to the at least one next process step or the same as the at least one next process step, and whereby the host multi-metal mass of the multi-metal catalyst also increases by at least 2 percent a host material functional parameter as compared to the host material functional parameter with the host multi-metal mass when at least 5 percent of the initial multi-metal mass of the multi-metal catalyst remains in the multi-wall carbon nanotubes.
Dependencies are inferred from the claim text.