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Injectable Supramolecular Polymer-Nanoparticle Hydrogels for Cell and Drug Delivery Applications
Published on: February 7, 2021
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Tough and self-healing hydrogels based on transient crosslinking by nanoparticles
Lihua Hong1, Li Liu1, Zhimin Zhang1
1Endodontics Department of Stomatological Hospital, Jilin University, Changchun 130021, P. R. China.
Soft Matter
|February 17, 2022
Summary
This study introduces transient crosslinking in hydrogels using core-shell particles, achieving superior mechanical strength and self-healing. This novel approach enhances hydrogel toughness and repair capabilities.
Area of Science:
- Materials Science
- Polymer Chemistry
- Biomaterials Engineering
Background:
- Hydrogels are versatile materials, but often lack sufficient mechanical strength and self-healing capabilities for demanding applications.
- Developing robust and repairable hydrogels is crucial for advanced material design.
Purpose of the Study:
- To engineer hydrogels with enhanced mechanical properties and self-healing efficiency.
- To investigate the role of transient crosslinking via hydrogen bonding in hydrogel reinforcement.
Main Methods:
- Preparation of core-shell particles with hydrophilic amino groups via emulsion polymerization.
- Dispersion of these particles into hydrophobic association polyacrylamide hydrogels.
- Construction of transient crosslinks through hydrogen bonding between particles and polymer matrix.
Main Results:
- The resulting hydrogels demonstrated a high tensile strength of 1.4 MPa.
- An impressive self-healing efficiency of 98% was achieved within 24 hours.
- Rheological measurements confirmed the successful reconstruction of transient crosslinks.
Conclusions:
- Transient crosslinking based on hydrogen bonding is an effective strategy for reinforcing hydrogels.
- This approach offers a novel pathway to create hydrogels with superior toughness and self-healing properties.
- The findings pave the way for advanced applications requiring durable and repairable hydrogel materials.
