Preparation and characterization of collagen-tio2 nanocomposite improved by glutaraldehyde / Zhou Nan in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 90, N° 5 (09-10/2006)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 90, N° 5 (09-10/2006) Titre : Preparation and characterization of collagen-tio2 nanocomposite improved by glutaraldehyde Type de document : texte imprimé Auteurs : Zhou Nan, Auteur ; Wuyong Chen, Auteur ; Li Shengli, Auteur ; Gu Haibin, Auteur ; Lin Yunzhou, Auteur ; Jia Lirong, Auteur Année de publication : 2006 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Antimicrobiens Caractérisation Collagène Cuirs et peaux -- Propriétés mécaniques Dioxyde de titane Glutaraldéhyde Matériaux hybrides Nanoparticules pH Stabilité hydrothermale Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Previous work from this laboratory has demonstrated that a collagen-TiO2 nanocomposite could be prepared via a sol-gel procedure. However, the shrinkage temperature produced by this kind of nanocomposite is low. In this experiment, the collagen-TiO2 nanocomposite was improved by adding glutaraldehyde and increasing the pH level. Results show that the optimum amount of glutaraldehyde is 6% (based on pickled pelt weight), and the optimal pH level for preparation is 3.5. These conditions raise the shrinkage temperature of the nanocomposite from 73.8°C to 82.2°C. Scanning Electron Micrographs (SEM) images indicate that the collagen fibril has been wrapped with nanoparticles. Meanwhile, results from Atomic Force Microscopy (AFM) suggest that nano-TiO2 with a particle size of 40nm can be formed in-situ in the collagen. Further experiments demonstrated that the introduction of nanoparticles endows the nanocomposite with antibacterial activity. Note de contenu : - EXPERIMENTAL PROCEDURES : Preparation of nano-TiO2 precursor solution - Preparation of collagen - Preparation of collagen-TiO2 nanocomposite - Determination of hydrothermal stability and mechanical properties - SEM and AFM analyses - Determination of antibacterial ability - RESULTS AND DISCUSSION : Effect of glutaraldehyde on hydrothermal stability of nanocomposite - Effect of pH on hydrothermal stability of nanocomposite - PERFORMANCE ANALYSIS OF NANOCOMPOSITE : Hydrothermal stability and mechanical properties - Scanning Electron Micrographs (SEM) Analysis - Atomic Force Microscope (AFM) Analysis - Antibacterial Activity - Table 1 : Hydrothermal stability and mechanical properties - Table 2 : The diameters of mould inhibition zones of samples (mm) En ligne : https://drive.google.com/file/d/1YMkuoB2rPmy6utuVddKuLwqEC_MsuvsT/view?usp=share [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39056 [article]

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