Biosensor Enzyme Membrane Cross-Linking With Oxidized Natural Polymers
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Solution Overview
Problem
Implantable biosensors face issues with immune reactions and short lifetimes due to biotoxic cross-linking agents like glutaraldehyde, affecting the activity and stability of sensitive moieties and increasing rejection reactions in the human body.
Innovation Solution
The use of oxidized natural polymer compounds, such as dialdehyde sodium alginate, as cross-linking agents to immobilize sensitive moieties in biosensors, enhancing biocompatibility and stability while avoiding biotoxicity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional cross-linking agents (glutaraldehyde, photoinitiator, acrylic) are used to immobilize sensitive moiety, then immobilization efficiency is improved, but biotoxicity increases and immune rejection reactions are enhanced
Solution Approach 1:
The patent changes the chemical parameters of the cross-linking agent from synthetic compounds (glutaraldehyde, photoinitiator, acrylic) to natural polymer compounds (sodium alginate, chitosan, gelatin, collagen, hyaluronic acid). This parameter change maintains cross-linking functionality while eliminating biotoxicity and immune rejection issues, as natural polymers are biocompatible and metabolizable.
Solution Approach 2:
The patent employs natural polymer compounds that are biodegradable and metabolizable, replacing persistent synthetic cross-linking agents. These natural polymers can be safely eliminated by the body after serving their immobilization function, reducing long-term biotoxicity and immune rejection risks.
2Strength
If conventional cross-linking agents are used, then cross-linking strength is improved, but activity and stability of sensitive moiety deteriorate
Solution Approach 1:
The patent modifies the chemical nature of cross-linking agents from harsh synthetic compounds to gentle natural polymers. Natural polymer compounds provide adequate cross-linking strength through their molecular structure while being milder in reaction conditions, thereby preserving the activity and stability of the sensitive moiety.
3Duration of action of stationary object
If biosensor service life is extended, then stability is improved, but immune rejection reactions increase with conventional agents
Solution Approach 1:
The patent changes the material composition from synthetic cross-linking agents to natural polymer compounds. This parameter change enables extended service life because natural polymers are biocompatible, reducing immune rejection reactions while maintaining structural integrity for prolonged operation.
Solution Approach 2:
The patent uses biodegradable natural polymer compounds that can be safely metabolized and eliminated by the body. This approach extends safe service life by reducing cumulative immune rejection, allowing the biosensor to function reliably before natural degradation occurs.
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 biosensors exhibit improved activity and stability, reducing immune rejection and extending service life by using oxidized natural polymers as cross-linking agents, ensuring effective sensing performance.
Implementation Method 1
The enzyme membrane layer comprises a sensitive moiety cross-linked by an oxidized natural polymer compound as a cross-linking agent, wherein the oxidized natural polymer compound is obtained by oxidizing a natural polymer compound
Data Source
Figure 1~3A
Figure 3B~4A
Figure 4B~5A
AI summary
The embodiments of the present disclosure provide a biosensor, the biosensor includes a working electrode, the working electrode includes an enzyme membrane layer, the enzyme membrane layer includes a sensitive moiety immobilized with an oxidized natural polymer compound as a cross-linking agent, and the oxidized natural polymer compound is obtained by oxidizing a natural polymer compound.