Analyte Sensor Polymer Membrane Curing for Long-Term Stability
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Solution Overview
Problem
Existing analyte sensors, particularly those for implantation, suffer from limited long-term stability and membrane performance issues, which affect their durability and accuracy in measuring bodily fluids.
Innovation Solution
A process for forming a membrane on an analyte sensor involving a polymer solution with cross-linkable groups, where the sensor is coated with a blend of first and second polymers, dried, and then cured to create a stable membrane, enhancing long-term stability and performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a diffusion barrier membrane is applied to control analyte diffusion, then measurement specificity is improved, but long-term stability deteriorates
Solution Approach 1:
The patent applies composite materials by combining multiple polymers (first polymer with first cross-linkable group, second polymer with second cross-linkable group) to form a blended membrane. This composite structure allows the membrane to simultaneously achieve diffusion control for measurement specificity and enhanced mechanical/chemical stability for long-term durability in vivo applications.
Solution Approach 2:
The patent employs parameter changes by utilizing different cross-linkable groups that respond to different curing conditions. The first and second polymers have distinct cross-linking mechanisms that can be activated under specific conditions, allowing optimization of both diffusion properties and structural stability through controlled cross-linking degree and network density.
2Ease of manufacture
If existing membrane preparation methods are used, then manufacturing simplicity is maintained, but membrane performance and durability worsen
Solution Approach 1:
The patent applies preliminary action by pre-mixing the first and second polymers with their respective cross-linkable groups in a homogeneous solution before application. This preliminary preparation ensures uniform distribution of components, leading to consistent membrane performance and reliability while maintaining a relatively simple manufacturing process.
Solution Approach 2:
The patent utilizes parameter changes by controlling the curing conditions to activate different cross-linkable groups sequentially or simultaneously. This allows optimization of the cross-linking process to achieve both high membrane performance and manufacturing efficiency by adjusting temperature, time, and catalyst parameters.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The process results in a well-defined, long-term stable membrane that improves the durability and predictability of analyte sensors, particularly for in vivo applications, with tailored properties and enhanced diffusion control.
Implementation Method 1
drying the analyte sensor obtained in step c) to obtain the dried analyte sensor which is coated with a polymer blend
Implementation Method 2
curing the polymer blend which coats the dried analyte sensor obtained in step d) whereby the at least one first polymer and the at least one second polymer are cross-linked to form the membrane on the analyte sensor
Implementation Method 3
a diffusion barrier that controls the diffusion of the analyte to be determined from the body fluid or tissue surrounding the electrochemical sensor to the enzyme molecules
Data Source
AI summary
The present invention relates to a process for forming a membrane on an analyte sensor. The present invention further relates to an analyte sensor obtainable by this process. Furthermore, the present invention relates to a process for forming a sensing layer on an electrode of an analyte sensor and to an analyte sensor comprising the sensing layer obtainable by the inventive process as well as the membrane obtainable by the inventive process. The analyte sensors obtainable by the inventive processes may mainly be used for conducting at least one analyte measurement of a bodily fluid of a user or a patient. The invention may both be applied in the field of home care as well as in the field of professional care, such as in hospitals. Other applications are generally feasible.