Cellulose Whiskers Influence the Morphology and Antibacterial Properties of Silver Nanoparticles Composites

Author(s)

Teodoro, Kelcilene B. R. ^{[1, 2]} ; Sanfelice, Rafaela C. ^[2] ; Mattoso, Luiz. H. C. ^[2] ; Correa, Daniel S. ^{[1, 2]}

Affiliation

^[1] Fed Univ Sao Carlos UFSCar, Ctr Exact Sci & Technol, Dept Chem, PPGQ, BR-13565905 Sao Carlos, SP - Brazil

^[2] Einbrapa Instrumentacao, Nanotechnol Natl Lab Agr LNNA, BR-13560970 Sao Carlos, SP - Brazil

• Document type: Journal article
• Source: Journal of Nanoscience and Nanotechnology; v. 18, n. 7, p. 4876-4883, JUL 2018.
• Web of Science Citations: 4

Abstract

Cellulose, the main component of plant cell walls, is a biopolymer widely used for industrial applications, including, food, paper and textile fabrication. More recently, hybrid materials composed of cellulose nanostructures and metal nanoparticles have been applied in diverse areas such as medical and pharmaceutical applications. In this work, cellulose-silver nanoparticles (AgNPs) hybrid material was synthesized and the influence of cellulose, employed as a stabilizer agent, was investigated. Specifically, cellulose whiskers (CCW) were extracted from commercial cotton fibers by acid hydrolysis route, while the AgNPs were synthesized by reducing silver salt using sodium citrate and/or sodium borohydride in the presence of CCW. The synthesized AgNPs/CCW nanocomposites were characterized in terms of morphology, chemical composition, surface charge and antibacterial properties. The varied synthetic routes generated AgNPs with different morphological characteristics in terms of size, shape and coalescence. The particularity of each sample resulted in distinct behaviors for the tested bacteria. Syntheses employing CCW resulted in AgNPs/CCW nanocomposites with controlled morphology and improved antibacterial effects against E. coli (Gram-negative) and S. aureus (Gram-positive), indicating CCW as a promising compound to be used in the syntheses of silver and other metal nanoparticles with controlled morphology and antibacterial properties. (AU)

• FAPESP's process: 14/16789-5 - Hybrid nanostructured materials based on conjugated polymers and metallic nanoparticles for sensor applications
• Grantee: Daniel Souza Corrêa
• Support Opportunities: Regular Research Grants
• FAPESP's process: 14/21184-5 - Nanocomposites from cellulose nanocrystals electrospun fibers for the development of polymeric sensors
• Grantee: Kelcilene Bruna Teodoro Costa
• Support Opportunities: Scholarships in Brazil - Doctorate