Efficient One-Step Passivation of Polyurethane Using Transurethanization

Area of Science:

• Biomaterials Science
• Surface Chemistry
• Polymer Science

Background:

• Uncontrolled biological material accumulation on medical devices leads to adverse host reactions and complications.
• Protein adsorption and cell adhesion are key issues causing device failure and patient harm.
• Developing biocompatible surfaces is crucial for effective medical device performance.

Purpose of the Study:

• To develop an efficient method for grafting poly(ethylene glycol) (PEG) onto polyurethane (PU) surfaces.
• To create anti-adhesive and hydrophilic surfaces on PU for biomedical applications.
• To evaluate the reduction of biological material adhesion on modified PU surfaces.

Main Methods:

• A novel transurethanization reaction was employed for a single-step grafting of PEG onto PU.
• The PEG hydroxyl group was deprotonated and reacted with the PU surface.
• Surface analysis techniques confirmed successful grafting and hydrophilic layer formation. Biological assays assessed protein, cell, platelet, and bacterial adhesion.

Main Results:

• Poly(ethylene glycol) was successfully grafted onto polyurethane surfaces.
• A hydrophilic polymeric layer was formed on the PU surface, confirmed by surface analysis.
• Modified surfaces exhibited significantly lower protein, cell, platelet, and bacterial adhesion compared to untreated surfaces.

Conclusions:

• The developed transurethanization strategy provides an efficient method for creating anti-adhesive PU surfaces.
• The PEG-grafted PU surfaces demonstrate reduced biofouling, indicating potential for biomedical applications.
• This surface modification approach offers a promising strategy to improve the biocompatibility of medical devices.