Fatty acid-based polyurethane films for wound dressing applications

Area of Science:

• Polymer Science
• Biomaterials Engineering
• Wound Care Technology

Background:

• Polyurethane films are explored for wound dressing applications.
• Fatty acid-based polyurethanes offer tunable properties for biomaterial development.

Purpose of the Study:

• To synthesize and characterize fatty acid-based polyurethane films for potential wound dressing materials.
• To evaluate the effect of catalysts and crosslinking on film properties and biocompatibility.

Main Methods:

• Polymerization reactions were conducted with and without catalysts.
• Film preparation utilized a casting-evaporation technique, with and without crosslink-catalysts.
• Mechanical testing, water absorption, permeability, and cytotoxicity assays (direct contact and MMT) were performed.

Main Results:

• Crosslink density influenced mechanical properties, increasing tensile strength and decreasing elongation at break.
• Films without crosslink-catalyst exhibited higher hydrophilicity and water absorption.
• Higher permeability was generally observed in films prepared without crosslink catalyst.
• The polyurethane film from an uncatalyzed reaction product without crosslink-catalyst demonstrated superior biocompatibility, comparable to commercial wound dressings.

Conclusions:

• Fatty acid-based polyurethane films can be tailored for wound dressing applications.
• Optimizing catalyst and crosslinking conditions is crucial for achieving desired film properties.
• The uncatalyzed, non-crosslinked polyurethane film shows significant potential as a biocompatible wound dressing material.