Antibacterial Properties of Novel Bacterial Cellulose Nanofiber Containing Silver Nanoparticles

In this work, we describe a novel facile method to prepare long one-dimensional hybrid nanofibers by using hydrated bacterial cellulose nanofibers(BCF) as a template. Silver(Ag) nanoparticles with an average diameter of 1.5 nm were well dispersed on BCF via a simple in situ chemical-reduction betwee...

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Published inChinese journal of chemical engineering Vol. 21; no. 12; pp. 1419 - 1424
Main Author 杨加志 刘晓丽 黄立勇 孙东平
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.12.2013
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ISSN1004-9541
2210-321X
DOI10.1016/S1004-9541(13)60636-9

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Summary:In this work, we describe a novel facile method to prepare long one-dimensional hybrid nanofibers by using hydrated bacterial cellulose nanofibers(BCF) as a template. Silver(Ag) nanoparticles with an average diameter of 1.5 nm were well dispersed on BCF via a simple in situ chemical-reduction between AgNO3 and NaBH4 at a relatively low temperature. A growth mechanism is proposed that Ag nanoparticles are uniformly anchored onto BCF by coordination with BC-containing hydroxyl groups. The bare BCF and as-prepared Ag/BCF hybrid nanofibers were characterized by several techniques including transmission electron microscopy, X-ray diffraction, thermogravimetric analyses, and ultraviolet-visible(UV-Vis) absorption spectra. The antibacterial properties of Ag/BCF hybrid nanofibers against Escherichia coli(E. coli, Gram-negative) and Staphylococcu saureus(S. saureus, Gram-positive) bacteria were evaluated by using modified Kirby Bauer method and colony forming count method. The results show that Ag nanoparticles are well dispersed on BCF surface via in situ chemical-reduction. The Ag/BCF hybrid nanofiber presents strong antibacterial property and thus offers its candidature for use as functional antimicrobial agents.
Bibliography:In this work, we describe a novel facile method to prepare long one-dimensional hybrid nanofibers by using hydrated bacterial cellulose nanofibers(BCF) as a template. Silver(Ag) nanoparticles with an average diameter of 1.5 nm were well dispersed on BCF via a simple in situ chemical-reduction between AgNO3 and NaBH4 at a relatively low temperature. A growth mechanism is proposed that Ag nanoparticles are uniformly anchored onto BCF by coordination with BC-containing hydroxyl groups. The bare BCF and as-prepared Ag/BCF hybrid nanofibers were characterized by several techniques including transmission electron microscopy, X-ray diffraction, thermogravimetric analyses, and ultraviolet-visible(UV-Vis) absorption spectra. The antibacterial properties of Ag/BCF hybrid nanofibers against Escherichia coli(E. coli, Gram-negative) and Staphylococcu saureus(S. saureus, Gram-positive) bacteria were evaluated by using modified Kirby Bauer method and colony forming count method. The results show that Ag nanoparticles are well dispersed on BCF surface via in situ chemical-reduction. The Ag/BCF hybrid nanofiber presents strong antibacterial property and thus offers its candidature for use as functional antimicrobial agents.
YANG Jiazhi;LIU Xiaoli;HUANG Liyong;SUN Dongping(1 Key Laboratory for Soft Chemistry and Functional Materials of Ministry Education, Nanjing University of Sci- ence and Technology, Nanjing 210094, China 2 State Key Laboratory of Bioelectronics, School of Biological and Medical Engineering, Southeast University, Nanjing 210096, China 3 Taixing Yulang Chemical Co., Ltd.)
11-3270/TQ
bacterial cellulose; nanofiber; antimicrobial agents; silver
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ISSN:1004-9541
2210-321X
DOI:10.1016/S1004-9541(13)60636-9