Silver nanoparticles incorporated konjac glucomannan-montmorillonite nacre-like composite films for antibacterial applications

Abstract

Artificial nacre-like konjac glucomannan-Montmorillonite (KGM-MTM) composite films with 'brick and mortar' microstructures have been fabricated based on using KGM-MTM hybrid nanosheets as building blocks. In the designed fabrication procedure, we assembled hybrid building blocks with a thin layer of KGM coating on the MTM nanosheets to form KGM-MTM composite film via vacuum filtration. The nacre-like microstructures enhanced the light transmission performance and mechanical properties (Tensile strength: 116 MPa) of KGM-MTM composite films. Additionally, Ag nanoparticles (Ag NPs) can be incorporated into the layered structures of KGM-MTM composite films via an in situ reduced method. It was found that KGM-MTM-Ag composite films significantly suppress bacterial growth, which makes them potentially applicable as antimicrobial films in the biomedical field.

Keywords: Antibacterial; Konjac glucomannan; Montmorillonite; Nacre-like; Silver nanoparticles.