Broad-Spectrum Supramolecularly Reloadable Antimicrobial Coatings

Area of Science:

• Materials Science
• Surface Chemistry
• Infectious Disease Control

Background:

• Current antimicrobial coatings face limitations including short efficacy, narrow spectrum, poor performance with organic matter, and high cost.
• Widespread adoption of antimicrobial surfaces is hindered by these challenges, impacting healthcare and food safety.
• Developing effective, durable, and cost-efficient antimicrobial solutions remains a critical need.

Purpose of the Study:

• To develop an inexpensive, broadly effective, and durable antimicrobial paint using quaternary ammonium compounds (QACs).
• To investigate supramolecular chemistry principles for enhanced QAC association and controlled release.
• To create a restorable antimicrobial surface for diverse applications.

Main Methods:

• Utilized waterborne latex particles supramolecularly associated with quaternary ammonium compounds (QACs).
• Determined optimal QAC pairing via ion immobilization on self-assembled monolayers.
• Employed polymer brushes to increase QAC surface loading density.
• Tested antimicrobial efficacy against four bacteria and four viruses.

Main Results:

• Developed a cost-effective paint with long-lasting antimicrobial action due to slow QAC release.
• Demonstrated broad-spectrum efficacy against tested bacteria and viruses, even in the presence of organic material.
• Confirmed efficacy persistence over 90 washes and successful restoration by spraying QAC solution.

Conclusions:

• The developed QAC-based antimicrobial paint offers a durable, restorable, and cost-effective solution for infection control.
• This technology has significant potential for application in healthcare settings and food production environments.
• The supramolecular approach provides a versatile platform for designing advanced antimicrobial surfaces.