Bioactive poly(2-hydroxyethylmethacrylate)/silica gel hybrid nanocomposites prepared by sol-gel process

Area of Science:

• Biomaterials Science
• Polymer Chemistry
• Materials Engineering

Background:

• Poly(2-hydroxyethylmethacrylate) (pHEMA) is a versatile polymer for biomedical uses.
• Silica gel possesses known bioactive properties.
• Developing advanced biomaterials is crucial for regenerative medicine.

Purpose of the Study:

• To synthesize and characterize a novel pHEMA-silica gel nanocomposite.
• To evaluate the bioactivity and material properties of the hybrid.
• To explore its potential application in bone tissue engineering.

Main Methods:

• Sol-gel method was used to create the hybrid material with 30% (w/w) silica gel.
• Characterization included thermogravimetric analysis (TG), differential thermal analysis (DTA), and scanning electron microscopy (SEM).
• Bioactivity was assessed via FT-IR spectroscopy, SEM, and energy dispersive system (EDS) after soaking in simulated body fluid (SBF).

Main Results:

• The nanocomposite exhibited phase separation between pHEMA and silica gel.
• Improved thermal stability, swelling properties, and a higher glass transition temperature compared to pure pHEMA were observed.
• Bioactive silica gel nanoparticles facilitated apatite formation on the nanocomposite surface in SBF.

Conclusions:

• The synthesized pHEMA-silica gel nanocomposite demonstrates enhanced material properties.
• The observed bioactivity, indicated by apatite formation, suggests potential for bone regeneration.
• This bioactive nanocomposite is a promising candidate for developing scaffolds in bone engineering.