Silver coated anionic cellulose nanofiber composites for an efficient antimicrobial activity

Published Date

20 September 2016, Vol.149:51–59, doi:10.1016/j.carbpol.2016.04.084

Title 

Silver coated anionic cellulose nanofiber composites for an efficient antimicrobial activity

• Author 

• Mayakrishnan Gopiraman ^b
• Abdul Wahab Jatoi ^a
• Seki Hiromichi ^a
• Kyohei Yamaguchi ^a
• Han-Yong Jeon ^c
• Ill-Min Chung ^b,,
• Ick Soo Kim ^a,,

• aNano Fusion Technology Research Group, Division of Frontier Fibers, Institute for Fiber Engineering (IFES), Interdisciplinary Cluster for Cutting Edge Research (ICCER), Shinshu University, Tokida 3-15-1, Ueda, Nagano Prefecture, 386-8567, Japan
• bDepartment of Applied Bioscience, College of Life & Environment Science, Konkuk University, Seoul, South Korea
• cDepartment of Applied Organic Materials Engineering, Inha University, Inha-Ro 100, Nam-Gu, Incheon, South Korea

Received 1 January 2016. Revised 4 April 2016. Accepted 19 April 2016. Available online 21 April 2016.

Highlights

• •
  Ag/cellulose nanofibers before (CMC-Ag) and after (AgNPs/CMC) reduction are prepared.
• •
  Physicochemical properties of CMC-Ag and AgNPs/CMC are investigated.
• •
  Content and release of Ag were higher in CMC-Ag than AgNPs/CMC.
• •
  Better antibacterial activity is concluded by CMC-Ag in comparison to AgNPs/CMC.

Abstract

Herein, we report a comparative study of silver coated anionic cellulose nanocomposite before (CMC-Ag) and after (AgNPs/CMC) chemical reduction for antibacterial activity. Cellulose nanofibers were prepared by deacetylation of electrospun cellulose acetate nanofibers, which were then treated with sodium chloroacetate to prepare anionic cellulose nanofibers (CMC). Aqueous AgNO₃solution with different concentrations was employed to produce nanofiber composites. To obtain AgNPs/CMC, the resultant Ag/CMC nanofibers were chemically reduced with NaBH₄. The nanocomposites were characterized by FE-SEM, FTIR, XPS and SEM-EDS. Antimicrobiality tests were conducted using S. aureus and Escherichia coli bacteria following standard test method JIS L1902, 2008. The EDS results confirmed higher silver content in CMC-Ag nanofibers than AgNPs/CMC nanofibers. The antimicrobial test and EDS results demonstrated higher silver release (larger halo width) by the former in comparison to later which confers better antimicrobiality by CMC-Ag nanofibers.

Graphical abstract

Chemical compounds studied in this article

• DMF (Pub Chem CID: 6228)
• Acetone (Pub Chem CID: 180)
• Silver nitrate (Pub Chem CID: 24470)
• Sodium hydroxide (Pub Chem CID: 14798)
• Chloroacetic acid (Pub Chem CID: 300)
• Sodium carbonate (Pub Chem CID: 10340)
• Sodium tetrahydroborate (Pub Chem CID: 22959485)

Keywords

• Electrospinning
• Nanocomposites
• Silver
• Reduction
• Antimicrobiality

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• DOC (523K)

• ⁎ 
  Corresponding authors.

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