Physicomechanical and Morphological Characterization of Multi-Structured Potassium-Acrylate-Based Hydrogels

Area of Science:

• Polymer Chemistry
• Materials Science
• Biomaterials Engineering

Background:

• Hydrogels are versatile polymeric networks with diverse applications.
• Controlling hydrogel microstructure is crucial for tailoring mechanical properties.
• Photo-polymerization offers precise control over hydrogel formation.

Purpose of the Study:

• To synthesize potassium acrylate-co-acrylamide hydrogels via photo-polymerization.
• To investigate the influence of crosslinker concentration on hydrogel properties.
• To characterize the micro-, meso-, and macrostructures developed during swelling.

Main Methods:

• Photo-polymerization technique was employed for hydrogel synthesis.
• Systematic variation of crosslinker (glycerol diacrylate) concentration.
• Comprehensive analysis of mechanical properties, swelling behavior, and morphology (SEM).

Main Results:

• Enhanced mechanical properties were achieved in structured hydrogels.
• A critical crosslinker concentration was identified, inducing distinct structural transitions.
• Shape-evolving surface patterns emerged during swelling, influencing mechanical performance.
• Correlation between structural complexity and improved mechanical strength was observed.

Conclusions:

• The study establishes a critical crosslinking concentration for multistructured acrylic hydrogels.
• Photo-polymerization provides a route to hydrogels with tunable structures and enhanced properties.
• The findings serve as a reference for future development of advanced functional hydrogels.