Biocompatible Star Block Copolymer Hydrogel Cross-linked with Calcium Ions

Area of Science:

• Materials Science
• Biomedical Engineering
• Polymer Chemistry

Background:

• Calcium-ion cross-linked hydrogels offer significant potential in diverse medical applications.
• Developing novel materials with controlled properties is crucial for advancing hydrogel technology.

Purpose of the Study:

• To synthesize a novel star block copolymer for creating calcium-crosslinked hydrogels.
• To characterize the morphology, hydrogel formation, and biocompatibility of the synthesized material.

Main Methods:

• Synthesis of a star block copolymer featuring a dendritic polyester core and dual hydrophilic arms (oligo(ethylene glycol) methyl ether acrylate and acrylic acid).
• Characterization of the copolymer's morphology and particle size using relevant techniques.
• Assessment of hydrogel formation kinetics in saline under physiological conditions upon addition of calcium ions.
• Evaluation of in vitro and in vivo biocompatibility of the copolymer and its hydrogel.

Main Results:

• The synthesized star block copolymer exhibited a spherical morphology with a mean diameter of 62 nm.
• Rapid hydrogel formation was observed when the copolymer was mixed with calcium ions in normal saline at physiological conditions.
• Both the star block copolymer and its calcium-crosslinked hydrogel demonstrated excellent in vitro and in vivo biocompatibility.

Conclusions:

• A novel star block copolymer capable of forming calcium-crosslinked hydrogels has been successfully synthesized.
• The material's rapid gelation and excellent biocompatibility highlight its potential for various biomedical applications.