Microwave-assisted surface modification of metallocene polyethylene for improving blood compatibility

Area of Science:

• Materials Science
• Biomedical Engineering
• Polymer Chemistry

Background:

• Polymers are crucial for medical applications, but surface properties often limit their use.
• Metallocene polyethylene (mPE) is a versatile polymer requiring surface modification for improved biocompatibility.

Purpose of the Study:

• To investigate microwave-assisted surface modification of mPE.
• To evaluate the impact of this modification on mPE's surface properties and blood compatibility.

Main Methods:

• Microwave-assisted surface treatment of mPE.
• Fourier-transform infrared (FTIR) spectroscopy for chemical analysis.
• Contact angle measurements for surface wettability.
• Scanning electron microscopy (SEM) for surface morphology.
• Coagulation assays (prothrombin time and activated partial thromboplastin time) and hemolysis tests for blood compatibility.

Main Results:

• FTIR analysis indicated no significant chemical group changes post-treatment.
• Contact angle decreased, signifying increased hydrophilicity.
• SEM revealed increased surface roughness and pore formation.
• Coagulation tests showed increased clotting times, and hemolysis was reduced, indicating improved blood compatibility.

Conclusions:

• Microwave-assisted surface modification effectively enhances the blood compatibility of mPE.
• The improved biocompatibility is attributed to increased hydrophilicity and altered surface morphology.
• This modified mPE holds potential for fabricating blood-contacting medical devices such as vascular prostheses and implants.