Self-Assembled Peptide Hydrogels for Oxygen Control
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Solution Overview
Problem
Current methods are limited in controlling oxygen concentrations and protecting oxygen-sensitive substances due to the gaseous nature and poor solubility of oxygen, which affects enzymatic reactions and energy storage applications, particularly for enzymes like [FeFe]-hydrogenase that require anaerobic conditions to function effectively.
Innovation Solution
Self-assembled peptide-based hydrogels, specifically formed from aromatic peptides like Fmoc-diphenylalanine, interact with oxygen, allowing for controlled oxygen absorption and release, thereby creating an environment that protects sensitive enzymes and facilitates oxygen transport.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If oxygen is used in aerobic metabolism and industrial applications, then energy production and chemical reactions are enabled, but oxygen damage and corrosion occur
Solution Approach 1:
The patent employs oxygen-scavenging materials as intermediary substances that selectively remove oxygen from the environment without directly interfering with the desired reactions. These materials act as mediators between the oxygen-containing atmosphere and oxygen-sensitive processes, enabling aerobic conditions to coexist with anaerobic requirements through controlled oxygen removal.
Solution Approach 2:
The invention extracts harmful oxygen from the environment using specialized scavenging materials. By removing oxygen selectively from localized zones, the system enables oxygen-sensitive reactions to proceed while maintaining overall aerobic conditions, effectively separating the oxygen-containing and oxygen-free environments.
2Quantity of substance
If iron powder and sodium chloride are used to decrease oxygen levels in packaged products, then oxygen concentration is reduced, but the system complexity and material requirements increase
Solution Approach 1:
The patent utilizes composite oxygen-scavenging materials that integrate multiple functional components into a single system. These composite materials combine oxygen-absorbing agents with catalysts and structural matrices, achieving effective oxygen removal without requiring separate compartments or complex assembly of individual materials like traditional iron powder and salt systems.
3Quantity of substance
If perfluorocarbons are used for oxygen delivery and tissue preservation, then oxygen solubility and transport capability are enhanced, but the cost and biocompatibility concerns increase
Solution Approach 1:
The invention modifies the physical and chemical parameters of oxygen transport by using alternative materials with different solubility characteristics. Instead of relying on perfluorocarbons with extremely high oxygen solubility, the patent employs materials that achieve adequate oxygen transport through optimized porosity, surface area, and controlled release mechanisms, thereby reducing cost while maintaining functionality.
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 self-assembled hydrogels effectively reduce oxygen concentrations, protect enzymes from oxidative damage, and enhance the stability and activity of oxygen-sensitive reactions, enabling prolonged functionality of enzymes like [FeFe]-hydrogenase and efficient energy storage and conversion processes.
Implementation Method 1
Self-assembled peptide-based hydrogels interact with oxygen, allowing for controlled oxygen absorption and release
Implementation Method 2
by taking advantage of π-π interactions between aromatic rings, self-assembly of short peptide molecules can easily be achieved
Data Source
AI summary
Methods which utilize a self-assembled structure formed of a plurality of peptides being of from 2 to 6 amino acids in length, and comprising at least one aromatic amino acid residue, wherein the self-assembled structure is capable of interacting with oxygen, are provided herewith. The methods may be for controlling (e.g., reducing) a concentration of free oxygen in an environment, and/or for transporting oxygen from a first environment to a second environment. Further described herein is a self-assembled structure as described herein having oxygen interacted therewith. Further described herein is a composition comprising the self-assembled structure and substance which is oxygen-sensitive and/or participates in an oxygen-sensitive reaction incorporated in the self-assembled structure, systems comprising such a composition and methods employing the composition or system. Further described herein are articles-of-manufacturing comprising any of the self-assembled structures or compositions as described herein and an oxygen-sensitive substance and uses thereof.