Carbon membrane laminated body and method for manufacturing the same
First Claim
1. A carbon membrane laminated body comprising:
- a porous substrate,a first porous carbon membrane as a carbon membrane underlayer disposed on a surface of the porous substrate and having an average pore diameter of 0.20 to 0.65 nm, anda second porous carbon membrane as a carbon membrane separation layer disposed on a surface of the carbon membrane underlayer, having a smaller film thickness and a smaller average pore diameter than those of the carbon membrane underlayer.
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Accused Products
Abstract
A carbon membrane laminated body includes: a porous substrate, a first porous carbon membrane as a carbon membrane underlayer disposed on a surface of the porous substrate, and a second porous carbon membrane as a carbon membrane separation layer disposed on a surface of the carbon membrane underlayer, having a smaller film thickness, and a smaller average pore diameter, compared with those of the carbon membrane underlayer. It is preferable to form the carbon membrane underlayer and the carbon membrane separation layer by carbonizing a carbon membrane underlayer precursor disposed on a surface of the porous substrate and the carbon membrane separation layer precursor disposed on a surface of the carbon membrane underlayer precursor at 400 to 1000° C. in a non-oxidation atmosphere. The carbon membrane laminated body is a separation membrane excellent in both separation performance and flux when it is used as a separation membrane of a mixture.
7 Citations
14 Claims
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1. A carbon membrane laminated body comprising:
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a porous substrate, a first porous carbon membrane as a carbon membrane underlayer disposed on a surface of the porous substrate and having an average pore diameter of 0.20 to 0.65 nm, and a second porous carbon membrane as a carbon membrane separation layer disposed on a surface of the carbon membrane underlayer, having a smaller film thickness and a smaller average pore diameter than those of the carbon membrane underlayer. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for manufacturing a carbon membrane laminated body comprising the steps of:
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disposing a first carbon membrane precursor as an underlayer precursor on a porous substrate to form an underlayer precursor-disposed body, disposing a second carbon membrane precursor as a separation membrane precursor which is thinner than the underlayer precursor on a surface of the underlayer precursor to form a carbon membrane precursor laminated body, and subjecting the carbon membrane precursor laminated body to a thermal treatment for carbonization of the underlayer precursor and the separation layer precursor to form respectively a carbon membrane underlayer disposed on a surface of the porous substrate and a carbon membrane separation layer disposed on a surface of the carbon membrane underlayer; the carbon membrane underlayer having an average pore diameter of 0.20 to 0.65 nm and the carbon membrane separation layer having a smaller average pore diameter and a smaller film thickness than those of the carbon membrane underlayer. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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Specification