Silver ion impregnated composite biomaterial optimally prepared using zeta potential measurements

Area of Science:

• Biomaterials Science
• Materials Chemistry
• Nanotechnology

Background:

• Developing biodegradable antimicrobial composites is crucial for advanced biomedical applications.
• Controlling silver ion release from such materials is essential for efficacy and safety.
• Understanding ceramic-biopolymer interactions influences material performance.

Purpose of the Study:

• To synthesize a biodegradable, antimicrobial composite with controlled silver ion release.
• To investigate the effect of silver ion concentration on protein adsorption and material properties.
• To utilize zeta potential and isoelectric point for optimizing ceramic-biopolymer interactions.

Main Methods:

• Synthesis of hydroxyapatite (HAp) and silver-incorporated hydroxyapatite (AgHAp) composites.
• Measurement of zeta potential and isoelectric point to optimize interactions with gelatin.
• Analysis using derivative thermo-gravimetric analysis (DTG) to confirm electrostatic interactions.
• Assessment of silver ion release in simulated body fluid and protein adsorption.

Main Results:

• Zeta potential optimization significantly enhanced ceramic-biopolymer interactions.
• Increased electrostatic interaction reduced silver ion release and controlled degradation.
• Higher silver ion concentration decreased protein adsorption due to increased hydrophilicity.
• The composite demonstrated non-toxicity, biodegradability, and antimicrobial properties.

Conclusions:

• Zeta potential is a novel tool for enhancing ceramic-biopolymer interactions in composite materials.
• Optimized interactions enable controlled release of silver ions, crucial for biomedical uses.
• The study identified optimal silver ion concentrations for protein adsorption, antimicrobial activity, and hemocompatibility.