Dual-Crosslinked Stretchable Hydrogel for Mechanical Stability
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Solution Overview
Problem
Existing self-healing hydrogels exhibit low mechanical strength and instability under physiological conditions, limiting their effectiveness in maintaining shape and structure.
Innovation Solution
A stretchable self-healing hydrogel composition is developed using oxidized hyaluronic acid (oHA), hydrazide-hyaluronic acid (hHA), and adipic acid dihydrazide (ADH), with dual crosslinking through electrostatic interaction and chemical bonding, enhancing mechanical properties and self-healing capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If self-healing hydrogel is used for tissue engineering applications, then biocompatibility and self-healing characteristics are improved, but mechanical strength and structural stability deteriorate
Solution Approach 1:
The patent creates a composite hydrogel system combining oxidized hyaluronic acid (oHA) and hydrazide-hyaluronic acid (hHA) with dual crosslinking mechanisms. This composite structure integrates covalent bonds (providing strength) and electrostatic interactions (providing self-healing), resolving the contradiction between mechanical strength and self-healing capability
Solution Approach 2:
The patent modifies the chemical parameters of hyaluronic acid by introducing aldehyde groups through oxidation and hydrazide groups through chemical modification. These parameter changes enable the formation of dual crosslinking structures that simultaneously provide mechanical strength and self-healing properties
2Reliability
If self-healing hydrogel is used for tissue engineering applications, then biocompatibility and self-healing characteristics are improved, but shape stability and structural maintenance deteriorate
Solution Approach 1:
The dual crosslinking composite structure combines stable covalent bonds for shape maintenance with reversible electrostatic interactions for self-healing. This composite approach allows the hydrogel to maintain shape stability while possessing self-healing capabilities under physiological conditions
Solution Approach 2:
The patent designs the hydrogel with pre-established dual crosslinking networks that can anticipate and compensate for mechanical damage. The covalent crosslinks provide a stable framework that cushions against structural collapse, while electrostatic crosslinks can reform after damage, maintaining shape stability
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 hydrogel demonstrates excellent mechanical properties, stability, and self-healing abilities, suitable for drug and cell delivery, and 3D bioprinting applications without additional gelation processes.
Implementation Method 1
an aldehyde group of the oHA forms a covalent bond with a hydrazide group of the hHA
Implementation Method 2
a carboxyl group of the oHA forms an ionic bond with a hydrazide group of the hHA
Data Source
AI summary
The present invention relates to a stretchable self-healing hydrogel. The hydrogel has excellent mechanical properties and stability, and stretchable and self-healing properties, and can be useful as a hydrogel for delivery of a drug or a cell, and a composition for 3D bioprinters.