Waterborne Polyurethane Adhesives Based on Gelatine-Stabilized AgNPs with Improved Antimicrobial Properties

Abstract

This work proposes the use of silver nanoparticles (AgNPs) to inhibit the bacterial growth of waterborne polyurethane adhesives. Therefore, AgNPs were synthesized from AgNO₃ using a natural polymer like gelatine as a reducing and stabilizing agent. The AgNPs exhibited a strong antimicrobial activity at very low concentrations. The incorporation of gelatine-stabilized AgNPs conferred antimicrobial properties on waterborne polyurethane adhesives without significantly altering their chemical, thermal, and adhesive properties.

KEYWORDS:

• Adhesives with nanoparticles
• Microscopy
• Polyurethane
• Thermal analysis
• Water-based

ACKNOWLEDGEMENT

Authors thank Synthesia Española which kindly provided the polyol used for the synthesis of the waterborne adhesive.

Notes

*st: stretching, δ: bending, sy: symmetric, asym: non-symmetric, δoop: bending out the plane.

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