title: Synthesis of surface bound silver nanoparticles on cellulose fibers using lignin as multi-functional agent.
abstract: Lignin has proven to be highly effective "green" multi-functional binding, complexing and reducing agents for silver cations as well as capping agents for the synthesis of silver nanoparticles on ultra-fine cellulose fibrous membranes. Silver nanoparticles could be synthesized in 10min to be densely distributed and stably bound on the cellulose fiber surfaces at up to 2.9% in mass. Silver nanoparticle increased in sizes from 5 to 100nm and became more polydispersed in size distribution on larger fibers and with longer synthesis time. These cellulose fiber bound silver nanoparticles did not agglomerate under elevated temperatures and showed improved thermal stability. The presence of alkali lignin conferred moderate UV absorbing ability in both UV-B and UV-C regions whereas the bound silver nanoparticles exhibited excellent antibacterial activities toward Escherichia coli.
authors.affiliation: Fiber and Polymer Science, University of California-Davis, One Shields Avenue, Davis, CA 95616, United States.
authors.forename: Sixiao
authors.initials: S
authors.lastname: Hu
authors.affiliation: Fiber and Polymer Science, University of California-Davis, One Shields Avenue, Davis, CA 95616, United States. Electronic address: ylhsieh@ucdavis.edu.
authors.forename: You-Lo
authors.initials: YL
authors.lastname: Hsieh
mesh_terms: D000468:Alkalies / Q000737:chemistry; D000900:Anti-Bacterial Agents / Q000494:pharmacology; D002152:Calorimetry, Differential Scanning; D002462:Cell Membrane / Q000648:ultrastructure; D002482:Cellulose / Q000737:chemistry*; D004926:Escherichia coli / Q000187:drug effects; D008031:Lignin / Q000737:chemistry* / Q000494:pharmacology; D053768:Metal Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D008826:Microbial Sensitivity Tests; D055620:Optical Phenomena; D012834:Silver / Q000737:chemistry*; D012972:Sodium Hydroxide / Q000737:chemistry; D012995:Solubility; D012996:Solutions; D013056:Spectrophotometry, Ultraviolet; D017550:Spectroscopy, Fourier Transform Infrared; D055672:Static Electricity; D013499:Surface Properties; D013818:Thermogravimetry
chemical_list: D000468:Alkalies; D000900:Anti-Bacterial Agents; D012996:Solutions; D012834:Silver; D012972:Sodium Hydroxide; D002482:Cellulose; D008031:Lignin
keywords: Antimicrobial; Cellulose nanofibers; Lignin; Silver nanoparticle synthesis; UV absorbing