US2018134562A1PendingUtilityA1

Graphene flower and method for manufacturing the same and composite material

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Assignee: IND TECH RES INSTPriority: Jul 21, 2015Filed: Dec 26, 2017Published: May 17, 2018
Est. expiryJul 21, 2035(~9 yrs left)· nominal 20-yr term from priority
Inventors:Kun-Ping HuangChih-Chen ChangChwung-Shan Kou
C01B 32/182C01B 32/184C01B 32/186
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Claims

Abstract

A method of forming graphene flower is provided, which includes introducing a hydrocarbon gas and an assistance gas into transformer-coupled plasma equipment, and providing a medium-frequency electromagnetic wave to the hydrocarbon gas and the assistance gas by the transformer-coupled plasma equipment to dissociate the hydrocarbon gas, and the dissociated hydrocarbon gas is re-combined to form the graphene flower, wherein the hydrocarbon gas is dissociated at a ratio of greater than 95%.

Claims

exact text as granted — not AI-modified
What is claimed is: 
     
         1 . A method of forming a graphene flower, comprising:
 introducing a hydrocarbon gas and an assistance gas into a transformer-coupled plasma equipment; and   providing a medium-frequency electromagnetic wave to the hydrocarbon gas and the assistance gas by the transformer coupled plasma equipment to dissociate the hydrocarbon gas, and the dissociated hydrocarbon gas is re-combined to form the graphene flower,   wherein the hydrocarbon gas is dissociated at a ratio of greater than 95%,   wherein the medium frequency electromagnetic wave has a frequency of 100 kHz to 3 MHz.   
     
     
         2 . The method as claimed in  claim 1 , wherein the hydrocarbon gas is introduced at a flow rate of 0.05 slm to 25 slm. 
     
     
         3 . The method as claimed in  claim 1 , wherein the assistance gas is introduced at a flow rate of 1 slm to 50 slm. 
     
     
         4 . The method as claimed in  claim 1 , wherein a flow rate of the hydrocarbon gas and a flow rate of the assistance gas have a ratio of 1:20 to 1:2. 
     
     
         5 . The method as claimed in  claim 1 , wherein the hydrocarbon gas comprises methane, ethylene, acetylene, or a combination thereof. 
     
     
         6 . The method as claimed in  claim 1 , wherein the assistance gas comprises argon, helium, nitrogen, or a combination thereof. 
     
     
         7 . The method as claimed in  claim 1 , wherein the hydrocarbon gas and the assistance gas in the transformer-coupled plasma equipment have a pressure of 0.1 torr to 20 torr. 
     
     
         8 . The method as claimed in  claim 1 , wherein the step of providing the medium-frequency electromagnetic wave is performed with a power that is greater than 1 kW. 
     
     
         9 . A graphene flower, comprising:
 a plurality of graphene sheets arranged in a non-parallel manner and tangled with each other,   wherein the graphene flower has a profile free of a planar surface.   
     
     
         10 . The graphene flower as claimed in  claim 9 , having a diameter of 10 nm to 5 mm. 
     
     
         11 . The graphene flower as claimed in  claim 9 , wherein the graphene sheets have a curved structure or an irregular wrinkle structure. 
     
     
         12 . A composite material, comprising:
 100 parts by weight of metal powder; and   0.5 to 50 parts by weight of graphene flower,   wherein the graphene flower includes a plurality of graphene sheets arranged in a non-parallel manner and tangled with each other, and   wherein the graphene flower has a profile free of a planar surface.   
     
     
         13 . The composite material as claimed in  claim 12 , wherein the metal powder has a diameter of 5 nm to 50 μm. 
     
     
         14 . The composite material as claimed in  claim 12 , wherein the graphene flower has a diameter of 10 nm to 50 μm. 
     
     
         15 . The composite material as claimed in  claim 12 , wherein the graphene sheets have a curved structure or an irregular wrinkle structure. 
     
     
         16 . The composite material as claimed in  claim 12 , having a heat dissipation coefficient greater than that of the metal powder. 
     
     
         17 . A composite material, comprising:
 100 parts by weight of polymer powder or liquid; and   0.5 to 50 parts by weight of graphene flower,   wherein the graphene flower includes a plurality of graphene sheets arranged in a non-parallel manner and tangled with each other, and   wherein the graphene flower has a profile free of a planar surface.   
     
     
         18 . The composite material as claimed in  claim 17 , wherein the polymer powder has a diameter of 5 nm to 50 μm. 
     
     
         19 . The composite material as claimed in  claim 17  wherein the graphene flower gas a diameter of 10 nm to 50 μm. 
     
     
         20 . The composite material as claimed in  claim 17 , wherein the graphene sheets have a curved structure or an irregular wrinkle structure. 
     
     
         21 . The composite material as claimed in  claim 17 , having a heat dissipation coefficient greater than that of the polymer powder or liquid.

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