Synthesis of surface bound silver nanoparticles on cellulose fibers using lignin as multi-functional agent

Published Date
20 October 2015, Vol.131:134–141, doi:10.1016/j.carbpol.2015.05.060

Title 
Synthesis of surface bound silver nanoparticles on cellulose fibers using lignin as multi-functional agent

• Author 

• Sixiao Hu
• You-Lo Hsieh ^,

• Fiber and Polymer Science, University of California-Davis, One Shields Avenue, Davis, CA 95616, United States

Received 15 April 2015. Revised 12 May 2015. Accepted 13 May 2015. Available online 4 June 2015.

Highlights

. Silver nanoparticles were synthesized and robustly bound on cellulose nanofibers.
. Lignin was used as multifunctional complexing, reducing and capping agents.
. The enhanced thermal stability of silver nanoparticles were achieved.
. UV-absorbing ability of cellulose nanofibers were gained.
. The nanoparticles bound celluloses showed excellent antimicrobial activities toward E.-coli.

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 10 min 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 100 nm 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.

Graphical abstract

Keywords

• Silver nanoparticle synthesis
• Lignin
• Cellulose nanofibers
• UV absorbing
• Antimicrobial

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