Electrochemical gas sensor with a hydrophilic membrane coating
First Claim
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1. An electrochemical gas sensor comprising:
- a gas-permeable and substantially ion-impermeable and liquid-impermeable membrane for separating an aqueous outer solution and an inner electrolyte solution, and a gas-permeable film of a hydrogel-forming hydrophilic polymer consisting essentially of non-covalently cross-linked polymer chains, wherein the film is present directly at least on the side of the membrane facing the aqueous outer solution, said film having a surface wettability for the aqueous outer solution that is higher than the surface wettability of the membrane for the aqueous outer solution, said sensor further comprising a channel for transport of said aqueous outer solution, said channel comprising at least one surface in contact with said aqueous outer solution.
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Abstract
An electrochemical gas sensor is provided comprising a gas-permeable and substantially ion- and liquid-impermeable membrane for separating an aqueous outer solution and an inner electrolyte solution comprising a gas-permeable film of a hydrophilic polymer consisting essentially of non-covalently cross-linked polymer chains, wherein the film is present directly at least on the side of the membrane facing the aqueous outer solution, which has a surface wettability for the aqueous outer solution that is higher than the surface wettability of the membrane for the aqueous outer solution.
26 Citations
16 Claims
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1. An electrochemical gas sensor comprising:
- a gas-permeable and substantially ion-impermeable and liquid-impermeable membrane for separating an aqueous outer solution and an inner electrolyte solution, and a gas-permeable film of a hydrogel-forming hydrophilic polymer consisting essentially of non-covalently cross-linked polymer chains, wherein the film is present directly at least on the side of the membrane facing the aqueous outer solution, said film having a surface wettability for the aqueous outer solution that is higher than the surface wettability of the membrane for the aqueous outer solution, said sensor further comprising a channel for transport of said aqueous outer solution, said channel comprising at least one surface in contact with said aqueous outer solution.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. An electrochemical gas sensor comprising:
- a gas-permeable and substantially ion-impermeable and liquid-impermeable membrane for separating an aqueous outer solution and an inner electrolyte solution, and a gas-permeable film of a hydrogel-forming hydrophilic polymer consisting essentially of non-covalently cross-linked polymer chains, wherein the film is present directly at least on the side of the membrane facing the aqueous outer solution, said film having a surface wettability for the aqueous outer solution that is higher than the surface wettability of the membrane for the aqueous outer solution, said sensor further comprising a channel for transport of said aqueous outer solution, said channel comprising at least one surface in contact with said aqueous outer solution, and wherein the thickness of the film of hydrophilic polymer is between about 0.01 and about 1.2 μ
m.
- a gas-permeable and substantially ion-impermeable and liquid-impermeable membrane for separating an aqueous outer solution and an inner electrolyte solution, and a gas-permeable film of a hydrogel-forming hydrophilic polymer consisting essentially of non-covalently cross-linked polymer chains, wherein the film is present directly at least on the side of the membrane facing the aqueous outer solution, said film having a surface wettability for the aqueous outer solution that is higher than the surface wettability of the membrane for the aqueous outer solution, said sensor further comprising a channel for transport of said aqueous outer solution, said channel comprising at least one surface in contact with said aqueous outer solution, and wherein the thickness of the film of hydrophilic polymer is between about 0.01 and about 1.2 μ
Specification