Polymer/Iron-Based Layered Double Hydroxides as Multifunctional Wound Dressings

Area of Science:

• Biomaterials Science
• Polymer Chemistry
• Nanotechnology

Background:

• Advanced wound dressings require multifunctional materials for effective healing.
• Layered double hydroxides (LDHs) offer tunable properties for drug delivery.
• Polyether-polyamide (PEBA) block copolymers provide a robust scaffold for biomaterials.

Purpose of the Study:

• To develop and characterize multifunctional therapeutic membranes for wound dressing applications.
• To investigate the influence of LDH composition on membrane properties and drug release.
• To evaluate the mechanical performance, drug release kinetics, and cytotoxicity of PEBA-LDH membranes.

Main Methods:

• Synthesis of PEBA-LDH composite membranes with varying LDH compositions (Mg/Zn-Cl and Mg/Zn-NAP).
• Structural, physical, and mechanical characterization of the developed membranes.
• In vitro assessment of naproxenate (NAP) release kinetics and cytotoxicity using cell viability assays.

Main Results:

• NAP-intercalated LDHs enhanced polymer-membrane interaction and mechanical strength.
• Sustained NAP release for over 8 hours was observed, with tunable kinetics based on LDH type.
• Mg-LDH containing membranes exhibited higher cell viability, with the PEBA-Mg-NAP membrane showing the best overall performance.

Conclusions:

• PEBA-LDH composite membranes are promising multifunctional therapeutic wound dressings.
• The Mg-NAP LDH-PEBA membrane exhibits excellent mechanical properties, controlled drug release, and good biocompatibility.
• This material represents a significant advancement for advanced wound care applications.