Natural Polymer-Based Hydrogels with Enhanced Mechanical Performances: Preparation, Structure, and Property

Area of Science:

• Biomaterials Science
• Polymer Chemistry
• Biomedical Engineering

Background:

• Natural polymer hydrogels offer excellent biocompatibility and biodegradability for biomedical uses.
• Poor mechanical properties of natural hydrogels hinder their widespread application.
• Enhancing mechanical strength is crucial for advancing natural polymer hydrogels.

Purpose of the Study:

• To review recent advancements in natural polymer-based hydrogels with improved mechanical properties.
• To categorize and discuss different structural strategies for mechanical enhancement.
• To explore future directions and challenges in this field.

Main Methods:

• Review of literature on natural polymer hydrogels with enhanced mechanical properties.
• Categorization based on structural approaches: double network, nanocomposite, click chemistry, and supramolecular hydrogels.
• Detailed analysis of preparation, structure, and mechanical performance for each type.

Main Results:

• Various strategies successfully enhance mechanical properties (stiffening, strengthening, stretchability) of natural hydrogels.
• Double network, nanocomposite, click chemistry, and supramolecular hydrogels represent key structural innovations.
• These enhanced hydrogels show potential for overcoming limitations of pure natural polymers.

Conclusions:

• Natural polymer hydrogels can be engineered for superior mechanical performance.
• Structural design is key to achieving desired properties for biomedical applications.
• 3D printing presents a promising future platform for developing advanced natural polymer hydrogels.