摘要 :
Thermal behaviors, compositions and structures of silver laurate prepared in water-alcohol system with double jet method has been investigated via DSC, FTIR, XRD and SEM, respectively. Silver nitrate, sodium hydroxide and lauric a...
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Thermal behaviors, compositions and structures of silver laurate prepared in water-alcohol system with double jet method has been investigated via DSC, FTIR, XRD and SEM, respectively. Silver nitrate, sodium hydroxide and lauric acid were used as reactants and PVP as protective agent. Results show that the highly ordered layer structures of as prepared samples were weakened at 173℃ and 212℃ and then decomposed at 238℃. The morphology changed from fiber-like to lamellar when the silver laurate was calcined at 212℃.
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摘要 :
A series of experiments for obtaining modified with silver nanoparticles ultra-high molecular weight polyethylene (UHMWPE) is done. Optimal precursors are silver trifluoroacetate, silver nitrate and silver methanesulfonate. Three ...
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A series of experiments for obtaining modified with silver nanoparticles ultra-high molecular weight polyethylene (UHMWPE) is done. Optimal precursors are silver trifluoroacetate, silver nitrate and silver methanesulfonate. Three variants of UHMWPE modification is studied: 1) the polyol synthesis, 2) polymer processing silver nanoparticle colloid and 3) reduction of silver salt solution in the UHMWPE polymer matrix. It is found that the last method is optimal. The specific surface of obtained nanoparticles is 7.1-7.6 m~2/g and the size varies in the range of 60-110 nm. The antibacterial activity of the composite samples to ￡ Coli and S. Aureus is studied. Inhibition of bacterial growth occurs at the level 10~4 cfu/ml and 10~6 cfu/ml respectively.
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摘要 :
A facile process was present in this paper for synthesizing nano silver particles colloidal in aqueous solutions using silver nitrate, sodium laurate, and hydrazine hydrate as silver precursor, stabilizer, and reducing agents, res...
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A facile process was present in this paper for synthesizing nano silver particles colloidal in aqueous solutions using silver nitrate, sodium laurate, and hydrazine hydrate as silver precursor, stabilizer, and reducing agents, respectively. The generation of nano silver particles was confirmed by change of color from milk white to brown or dark. The prepared silver nanoparticles were analyzed by scanning electron microscope (SEM), transmission electron microscope (TEM), UV–Visible spectroscopy (UV–Vis), X-ray diffraction (XRD), and Fourier transform infrared spectroscopic (FT-IR). The SEM and TEM images indicated that the prepared silver nanoparticles have spherical shape, average size of 6 nm, and with a narrow distribution from 2 to 8 nm. The XRD information exhibited that the obtained metallic nanoparticles were highly crystalline in nature. FT-IR data demonstrated that the sodium laurate absorbed on the surface of silver nanoparticles. The effects of the sodium laurate and hydrazine hydrate on the silver nanoparticle formation were studied. The mechanism of the formation silver nanoparticles was discussed. The process raised in this study can be considered as an excellent candidate for the preparation of silver nanoparticles in a large-scale production. The simple method can be extended to synthesis of other noble metal nanoparticles.
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摘要 :
The silver salts of fatty acids were studied as precursors for the preparation of colloidal dispersions of silver nanoparticles and UHMWPE (ultra-high-molecular-weight polyethylene) composite with silver nanoparticles, as well as ...
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The silver salts of fatty acids were studied as precursors for the preparation of colloidal dispersions of silver nanoparticles and UHMWPE (ultra-high-molecular-weight polyethylene) composite with silver nanoparticles, as well as the composition, the spectra and SEM (scanning electron microscopy) results.
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