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Research articles

ScienceAsia 48 (2022):ID 847-854 |doi: 10.2306/scienceasia1513-1874.2022.122

Facile and green synthesis of AgNPs by microwave-assisted method using curcumin biomaterial for improving antibacterial activities of NR/Ag composite sheets

Warot Chotpatiwetchkula, Monthol Saengsawanga, Chaval Sriwonga,b,*

ABSTRACT:     Natural rubber (NR)-based composites or hybrid products obtained from NR and several nano-materials are of interest due to their wide range of applications. However, they are easily contaminated with bacteria or fungi that can affect human health, especially those used in food container and on human skin. Herein, we present the composite sheets of NR latex and silver nanoparticles (AgNPs) with exceptionally high antibacterial activities. AgNPs were firstly synthesized by a facile, rapid, and green microwave-assisted method using curcumin as a biomaterial reductant and stabilizer. Then, natural rubbers loaded with AgNPs (NR/Ag) composite sheets were prepared via a simple direct latex mixing-casting process of NR latex and various contents of AgNPs. The result demonstrated that the synthesized AgNPs had a spherical-like shape of 12.25?3.13 nm. All the prepared NR/Ag composite sheets exhibited high performance in antibacterial properties against Staphylococcus aureus and Escherichia coli, and the antibacterial activities were dependent on the loaded AgNPs content. In this study, it is anticipated that these rapid, simple, green, and effective methods can suitably be scaled up for large-scale preparation of the stabilized AgNPs colloid and NR/Ag composite products.

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a Department of Chemistry, School of Science, King Mongkut?s Institute of Technology Ladkrabang, Bangkok 10520 Thailand
b Center of Excellence in Smart Materials Research and Innovation, King Mongkut?s Institute of Technology Ladkrabang, Bangkok 10520 Thailand

* Corresponding author, E-mail: chaval.sr@kmitl.ac.th

Received 14 Nov 2021, Accepted 15 Jun 2022