HYBRID EVENT: You can participate in person at Rome, Italy or Virtually from your home or work.

10th Edition of World Nanotechnology Conference

March 10-12, 2025

March 10 -12, 2025 | Rome, Italy
World Nano 2025

Enhanced durability of antimicrobial activity in cotton textiles by L-Cysteine-Capped Copper Nanoparticles through laundering cycles

Carla Cisternas Novoa, Speaker at Nanotechnology Conferences
Universidad de La Frontera, Chile
Title : Enhanced durability of antimicrobial activity in cotton textiles by L-Cysteine-Capped Copper Nanoparticles through laundering cycles

Abstract:

In this study, L-cysteine-capped copper nanoparticles (Cys-CuNPs) were successfully linked into a cotton textile, being attached in a covalent way to the cotton fibers via esterification. The CuNPs were adhered to the fiber surface through coordination bonds with the thiol groups from the L-cys, and its antimicrobial activity was tested in several laundering cycles. 

Materials and methods: The characterization of the Cys-CuNP was accomplished by UV−visible (UV−Vis), Z-potential and X-ray diffraction (XRD). After the attachment of the Cys-CuNPs to the raw cotton, the textile surface was characterized by variable pressure scanning electron microscopy (VP-SEM), and Fourier transform infrared spectroscopy (FT-IR). The antibacterial activity of the cotton textile functionalized with the Cys-CuNPs was tested through 100 laundering cycles using lauryl sulphate and distilled water. Every ten laundering cycles the antibacterial activity of the textile was performed by disk diffusion analysis.

Results: The UV−Vis analysis showed the presence of CuNPs in the Cys-CuNPs solution, showing the SPR for the CuNPs among 580–620 nm. In addition, they exhibited a Z-potential among -17 and -10 mV, with the presence of elemental and oxide Cu shown by the XRD analysis. The VP-SEM images from the cotton fabrics covered in Cys-CuNPs showed the presence of spherical CuNPs on their surface. Furthermore, FT-IR analysis exhibited peaks associated with the presence of L-cysteine (SH-) and carboxylic acid arising from the esterification reaction among the cellulose from cotton and the carboxylic acid in the L-Cys molecules. Finally, the cotton textile exhibited antibacterial activity against Escherichia coli, Staphylococcus aureus and Candida albicans and its antimicrobial activity and durability was up 80 laundering cycles.

Conclusions: This study demonstrates the ability of Cys-CuNPs to bind in a covalent way to the cellulose from cotton fabric, showing an antimicrobial activity.

Biography:

Dr. Carla Cisternas Novoa, is a Biotechnologist (2012) Doctor in Science of Natural Resources from Universidad de La Frontera (2022). Dr. Cisternas has centered her scientific interest on studies on the mechanisms associated with the synthesis of nanoparticles and its antibacterial activity in several applications. Nowadays, she belongs to the research of the “Center of Investigation in Environmental Biotechnology”, executing her second year as a Postdoctoral researcher supervised by Dr. Cristina Diez Jerez. On the other side, Dr. Cisternas has actively collaborated in FONDECYT Projects, worked as Professor assistant and participating in many worldwide conferences and  actively publishing research articles as first and co-author.

Watsapp