Tannin-Based Microbicidal Coatings for Hospital Privacy Curtains

Overview

Journal J Funct Biomater

Specialty Biomedical Engineering

Date 2023 Apr 27

PMID 37103276

Authors

Petri Widsten

Satu Salo

Klaus Niemela

Hanna Helin

Minna Salonen

Hanna-Leena Alakomi

Affiliations

Soon will be listed here.

Abstract

The goal of this study was to develop a sustainable, tannin-based option for silver-based and other current antimicrobial solutions for hospital privacy curtains. Commercial tree-derived tannins were characterized and their in vitro antibacterial properties against and were determined. Hydrolysable tannins showed greater antibacterial efficacy than condensed tannins but differences in antibacterial efficacy between any of the tannins could not be attributed to their functional group content or molar mass. Outer membrane disruption was not a significant factor in antibacterial efficacy of tannins against . In a hospital field study, draw patches coated with hydrolysable tannins and affixed to privacy curtains reduced total bacteria count by 60% over eight weeks compared to their matching uncoated reference sides. In a follow-up laboratory study with , very light spraying with water improved contact between bacteria and coating, enhancing the antibacterial effect by several orders of magnitude.

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