Grafting Polymer Brushes by ATRP from Functionalized Poly(ether ether ketone) Microparticles.

Area of Science:

• Biomaterials Science
• Polymer Chemistry
• Surface Science

Background:

• Poly(ether ether ketone) (PEEK) is a widely used biomaterial for implants due to its mechanical and chemical resistance.
• However, PEEK's hydrophobic and inert surface limits its ability to support bone growth and osseointegration.
• Developing surface modification techniques is crucial for advancing PEEK-based implant materials.

Purpose of the Study:

• To investigate the efficacy of surface-initiated atom transfer radical polymerization (SI-ATRP) for modifying Poly(ether ether ketone) microparticles (PMP).
• To enhance the surface properties of PEEK to improve its interaction with biological tissues.
• To explore the potential of modified PEEK as a compatibilizer for the polymer-tissue interface in biomedical applications.

Main Methods:

• Synthesis of novel PEEK microparticles (PMP) with a hard core-soft shell structure.
• Surface modification of PMP using surface-initiated atom transfer radical polymerization (SI-ATRP).
• Characterization of modified PMP using Dynamic Light Scattering (DLS), Attenuated Total Reflectance Infrared Spectroscopy (ATR-IR), X-ray Photoelectron Spectroscopy (XPS), and Transmission Electron Microscopy (TEM).

Main Results:

• Successful surface grafting of materials onto PEEK microparticles was achieved via SI-ATRP.
• The surface-modified PMP exhibited increased solubility and stability across various solvents.
• Characterization confirmed the successful modification and structural integrity of the hard core-soft shell PMP.

Conclusions:

• Surface-initiated ATRP is an effective method for modifying PEEK microparticles.
• The enhanced solubility and stability of modified PMP suggest improved biocompatibility.
• These surface-grafted PMP hold promise as compatibilizers for the polymer-tissue interface, potentially improving osseointegration in implants.