Water-Soluble Sulfur-Ylide-Functionalized Polyacrylamides for Antibacterial Surface Applications

Area of Science:

• Materials Science
• Polymer Chemistry
• Biomedical Engineering

Background:

• Surface fouling by biomolecules and microbes is a major challenge in healthcare, leading to infections and antimicrobial resistance.
• Current antifouling strategies often involve hydration layers or cytotoxic agents.
• Zwitterionic polymers from ylides present a novel approach, with sulfur ylides being less explored than N-oxide ylides.

Purpose of the Study:

• To develop and characterize a water-soluble poly(sulfur ylide) for antifouling and antimicrobial applications.
• To compare its properties with hydrophobic polystyrene-derived analogues.
• To elucidate the mechanisms behind its antifouling and antimicrobial actions.

Main Methods:

• Synthesis of a water-soluble acrylamide-based poly(sulfur ylide).
• Comparative analysis with hydrophobic polystyrene-derived poly(sulfur ylides).
• Computational modeling and genetic analysis to investigate interaction mechanisms.

Main Results:

• Water-soluble poly(sulfur ylides) exhibit surface antimicrobial activity but lack solution cytotoxicity.
• Hydrophobic analogues show stronger interactions and enhanced antimicrobial effects due to backbone hydrophobicity.
• Computational and genetic data indicate outer membrane destabilization by both polymer types.

Conclusions:

• Water-soluble poly(sulfur ylides) offer a safer alternative with retained surface antimicrobial efficacy.
• Hydrophobicity plays a key role in the interaction strength and efficacy of these polymers.
• Further research into supramolecular behavior is needed to optimize antifouling and antimicrobial properties.