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Electrospun gelatin nanofibers functionalized with silver nanoparticles

F. TOFOLEANU1, T. BALAU MINDRU2, F. BRINZA1, N. SULITANU1, I. G. SANDU3, D. RAILEANU4, V. FLORISTEAN5, B. A. HAGIU5, C. IONESCU6, I. SANDU7, V. TURA1,*

Affiliation

  1. Faculty of Physics, Al. I. Cuza University, Blvd. Carol I nr. 11A, 700506, Iasi, Romania
  2. Faculty of Textiles and Leather Engineering, Gh. Asachi Technical University, Str. Dimitrie Mangeron nr. 53, Corp TEX1, 700050, Iasi, Romania
  3. Faculty of Materials Science and Engineering, Gh. Asachi Technical University, Str. Dimitrie Mangeron nr. 63, 700050, Iasi, Romania
  4. Faculty of Biology, Al. I. Cuza University, Blvd. Carol I nr. 11A, 700506, Iasi, Romania
  5. Faculty of Veterinary Medicine, Ion Ionescu de la Brad University of Agricultural Science and Veterinary Medicine, Aleea Mihail Sadoveanu nr. 3, Iasi, 700490, Romania
  6. Faculty of Medicine, Gr. T. Popa University of Medicine and Pharmacy, Str.Universitatii nr.16, 700115, Iasi, Romania
  7. Faculty of Orthodox Theology, Al. I. Cuza University of Iasi, Bd. Carol I, nr. 11A, 700506, Romania

Abstract

The present paper deals with gelatin nanofibres functionalized with silver nanoparticles, prepared by electrospinning using solutions of gelatin mixed with silver nitrate. As a common solvent for gelatin and AgNO3 was selected a mixture of formic acid and acetic acid in volume ratio 4:1. In this system, formic acid was used as a solvent of gelatine, but also as reducing agent for silver ions in solution. Silver nanoparticles were stabilized through a mechanism that involves an interaction with oxygen atoms of carbonyl groups of gelatin. The gelatin nanofibres functionalised with silver nanoparticles were characterized by transmission electron microscopy (TEM), scanning electron microscopy (SEM), X-ray diffraction (XRD) and antimicrobial test. The results of investigations by TEM and XRD confirmed the presence of silver nanoparticles with diameters less than 20 nm, uniformly distributed over the surface of smooth nanofibres with an average diameter of 70 nm. The tests demonstrated that gelatin/Ag nanofibers have a good antimicrobial activity against Escherichia coli..

Keywords

Electrospinning, Gelatin, Silver, Nanofibers, Nanoparticles.

Submitted at: Nov. 7, 2008
Accepted at: Dec. 10, 2008

Citation

F. TOFOLEANU, T. BALAU MINDRU, F. BRINZA, N. SULITANU, I. G. SANDU, D. RAILEANU, V. FLORISTEAN, B. A. HAGIU, C. IONESCU, I. SANDU, V. TURA, Electrospun gelatin nanofibers functionalized with silver nanoparticles, Journal of Optoelectronics and Advanced Materials Vol. 10, Iss. 12, pp. 3512-3516 (2008)