Polyanionic Composite Membranes Based on Bacterial Cellulose and Amino Acid for Antimicrobial Application

Area of Science:

• Biomaterials Science
• Materials Chemistry
• Nanotechnology

Background:

• Ideal wound dressings require active healing properties, but bacterial cellulose (BC) lacks intrinsic antimicrobial activity.
• Developing BC-based materials with antimicrobial capabilities is crucial for advanced wound care applications.

Purpose of the Study:

• To synthesize and evaluate novel composite membranes of bacterial cellulose and polymeric ionic liquids (BC/PILs) for wound dressing applications.
• To investigate the antimicrobial activity, physicochemical properties, and biocompatibility of these BC/PIL membranes.

Main Methods:

• Composite membranes were synthesized using an ex situ method, combining bacterial cellulose with polymeric ionic liquids (PILs) derived from choline and various amino acids.
• Systematic investigation of physicochemical properties, antimicrobial efficacy against Gram-positive and Gram-negative bacteria and fungi, and in vitro biocompatibility.

Main Results:

• BC/PIL membranes with tunable properties were successfully fabricated by adjusting PIL concentration and type.
• Several BC/PIL formulations demonstrated significant antimicrobial activity and good biocompatibility.
• Anionic components of the PILs were identified as key contributors to the observed antimicrobial effects.

Conclusions:

• Composite membranes of bacterial cellulose and polymeric ionic liquids offer a promising new class of wound dressing materials.
• The incorporation of PILs effectively imparts antimicrobial activity to BC, addressing its limitations for wound healing applications.
• These BC/PIL membranes represent a novel and effective candidate for advanced wound management strategies.