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PhD

Domenii publicaţii > Fizica + Tipuri publicaţii > Articol în revistã ştiinţificã

Autori: Carmen Gaidau, Maria Giurginca, Teodora Dragomir, Aura Petica, Wuyong Chen

Editorial: JOAM, 2010, vol12, nr10, p. 2157-2163, p.p. 2157-21, 2010.

Rezumat:

The paper presents the study of different kinds of silver nanoparticle interaction with collagen model solutions in view of optimizing the processing technology of collagen based materials. The collagen model solutions were interacted with classical crosslinking agents and silver nanoparticles synthesized by chemical, electrochemical methods or by deposition on TiO2. The same nanosilver colloidal solutions and dispersion were interacted with leather. The main possibilities of nanosilver interaction with collagen macromolecule were assessed by FT-IR, atomic absorption and fluorescence spectroscopy. The study has revealed the IR spectral modification of amide I band in the case of interaction of chemically synthesized nanosilver with collagen in solution and in the case of interaction of chemically and electrochemically synthesized nanosilver with leather. This result proved that nanosilver reacts with collagen macromolecule inducing modification at secondary structure level through hydrogen bonds in carbonyl groups. The sensible modification of the amide band III in the case of interaction of nanosilver with leather collagen and the fluorescent emissions at 360 nm excitation have proved binding in the collagen chain and the influence of silver concentration. The analysis of amide I and amide II band positions of collagen in different conditions of interaction with chromium or polyurethane crosslinking agents and nanosilver allowed assessing the influence of nanosilver on macromolecule denaturation.

Cuvinte cheie: optoelectronica, materiale avansate // optoelectronic, advanced materials

URL: http://www.JOAM.inoe.ro