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Updated: Feb 28, 2026
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Development of a Benchtop Model for Evaluating the Compatibility of Wound Dressing Materials with Negative Pressure Wound Therapy Systems
Published on: May 2, 2025
951
Hemostatic kaolin-polyurethane foam composites for multifunctional wound dressing applications.
Jeffrey G Lundin1, Christopher L McGann1, Grant C Daniels1
1Chemistry Division, Naval Research Laboratory, 4555 Overlook Avenue SW, Washington, D.C. 20375, USA.
Summary
New polyurethane (PU) hydrogel foams with kaolin offer improved hemostatic properties for military wound care. These robust, absorptive dressings effectively manage exudate and prevent infection, showing great potential for battlefield injuries.
Area of Science:
- Biomaterials Science
- Polymer Chemistry
- Wound Healing Technologies
Background:
- Traumatic limb injuries in military settings pose significant acute care challenges.
- Current wound dressings require enhanced functionality for prolonged use in austere environments.
- Need for multifunctional materials that control exudate, prevent infection, and provide physical protection.
Purpose of the Study:
- To develop and characterize polyurethane (PU) hydrogel foams incorporating kaolin for hemostatic properties.
- To evaluate the synthesis, cytocompatibility, and drug release of kaolin-PU composites.
- To assess the potential of these materials as advanced wound dressings for military applications.
Main Methods:
- Incorporation of kaolin (1-10wt%) into robust PU hydrogel foams via a one-pot synthesis.
- Characterization using Attenuated Total Reflectance Infrared Spectroscopy (ATR-IR) and gel fraction analysis.
- Assessment of kaolin dispersion, cytocompatibility, ciprofloxacin release kinetics, and hemostatic efficacy.
Main Results:
- Facile, one-pot synthesis of PU hydrogels was unaffected by kaolin loading.
- Non-toxic catalyst improved material cytocompatibility.
- Kaolin-PU composites showed burst release of ciprofloxacin, increasing with kaolin concentration.
- Excellent hemostatic properties were achieved at 5wt% kaolin loading.
Conclusions:
- Simple and inexpensive synthesis of robust kaolin-PU hydrogel foams.
- Materials demonstrate multifunctional capabilities: hemostatic, absorptive, and drug-releasing.
- Promising potential as advanced wound dressing materials for acute traumatic injuries, particularly in military settings.
