Pressure sensitive graphene-based valve element
First Claim
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1. A valve element disposed between a gas pressure differential, comprising:
- (1) a separating wall placed between a gas at a higher pressure and a gas at a lower pressure, wherein the difference between the higher pressure and the lower pressure is a pressure differential, wherein the wall comprises an aperture allowing fluid communication between the gases;
(2) a valve membrane occluding the aperture, wherein the membrane comprises a graphene-based layer and a porous support, wherein the graphene-based layer is deposited upon the porous support;
wherein the graphene-based layer comprises graphene oxide and a crosslinker which creates covalent linkages between materials within the graphene-based layer, wherein the crosslinker comprises an alkyldiamine, an arylenediamine, polyvinyl alcohol, or a combination thereof;
wherein the valve membrane allows the gas at the higher pressure to begin to pass through the aperture when the pressure differential reaches an opening threshold.
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Abstract
Described herein is a graphene-based valve element capable of passive and repeatable stopping or allowing fluid flow as a function of inlet pressure. Passive flow controller devices based on the valve element are also described.
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19 Claims
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1. A valve element disposed between a gas pressure differential, comprising:
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(1) a separating wall placed between a gas at a higher pressure and a gas at a lower pressure, wherein the difference between the higher pressure and the lower pressure is a pressure differential, wherein the wall comprises an aperture allowing fluid communication between the gases; (2) a valve membrane occluding the aperture, wherein the membrane comprises a graphene-based layer and a porous support, wherein the graphene-based layer is deposited upon the porous support; wherein the graphene-based layer comprises graphene oxide and a crosslinker which creates covalent linkages between materials within the graphene-based layer, wherein the crosslinker comprises an alkyldiamine, an arylenediamine, polyvinyl alcohol, or a combination thereof; wherein the valve membrane allows the gas at the higher pressure to begin to pass through the aperture when the pressure differential reaches an opening threshold. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification