National Research & Development Institute for Textiles and Leather INCDTP Division

Bucharest, Romania

National Research & Development Institute for Textiles and Leather INCDTP Division

Bucharest, Romania
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Predoi D.,National Institute of Materials Physics Bucharest | Iconaru S.L.,National Institute of Materials Physics Bucharest | Albu M.,National Research & Development Institute for Textiles and Leather INCDTP Division | Petre C.C.,Polytechnic University of Bucharest | Jiga G.,Polytechnic University of Bucharest
Polymer Engineering and Science | Year: 2017

Silver-doped hydroxyapatite (AgHAp) was prepared by co-precipitation method at room temperature. The obtained AgHAp was added in different amounts of collagen gel (AgHApC1 and AgHApC2). Afterward, the gel was lyophilized and the final AgHApC1 and AgHApC2 composite was achieved. The purity, crystallinity, and the phase composition of the AgHAp, AgHApC1, and AgHApC2 samples were evaluated by X-ray diffraction (XRD). The planes corresponding to the 2θ values for hydroxyapatite were found in the three samples analyzed in agreement with the crystalline hydroxyapatite. In the Fourier transform infrared (FT-IR) spectra of AgHApC1 and AgHApC2 samples the peak characteristic to the presence of ν2 phosphate mode at 472/cm was found. The peaks resulting from the ν4 vibration of the P–O mode, ν1 symmetric P–O stretching vibration and ν3 P–O stretching vibration of PO3- 2 were also evidenced in all the samples. The formation of agglomerated particles with uniform particle size was evidenced by scanning electron microscope (SEM). The uniform distribution of the constituent elements was evidenced by mapping analysis. Furthermore, the strong antibacterial activity of AgHAp, AgHApC1, and AgHApC2 samples against Gram-negative (Escherichia coli) and Gram-positive (Staphylococcus aureus) bacterial strains was shown. The inhibition zone increased drastically with the increase of silver concentration. POLYM. ENG. SCI., 57:537–545, 2017. © 2017 Society of Plastics Engineers. © 2017 Society of Plastics Engineers

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