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Bactericidal and fungicidal action of copper nanoparticles on leather surface / N. Deepak in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVIII, N° 12 (12/2023)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXVIII, N° 12 (12/2023) . - p. 519-528 Titre : Bactericidal and fungicidal action of copper nanoparticles on leather surface Type de document : texte imprimé Auteurs : N. Deepak, Auteur ; Inbasekar Chandrasekar, Auteur ; Nishad Fathima Nishter, Auteur Année de publication : 2023 Article en page(s) : p. 519-528 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Antibactériens Cuivre Fongicides Nanoparticules Produits de conservation du cuir Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Although tanning makes the collagen matrix resilient against microbial attack, the chemicals used in the finishing process are susceptible to microbes. Hence, it is imperative to develop a finishing process with inherent antimicrobial properties. Leathers with antimicrobial properties evoke a considerable array of interest in consumers. The present study aims to enhance the antimicrobial properties of the leather using copper nanoparticles in the finishing and retanning process. Copper nanoparticles have been synthesized by chemical reduction using copper sulphate pentahydrate as the precursor with dialdehyde starch and gallic acid. The prepared nanoparticles have been characterized using UV-Visible spectrometry, dynamic light scattering, scanning electron microscopy, transmission electron microscopy, and X-ray diffraction techniques. The prepared nanoparticles have been used in both retanning and finishing processes. The experimental leather retanned using copper nanoparticles possess good mechanical strength properties and color index value compare to the control. Nanoparticles are effective against both gram negative and positive bacterial organisms. The nanoparticles also inhibit the growth of common fungus, which can colonize on leather. Thus, the current study paves the way for a novel solution that is an alternative to biocides and antimicrobial chemicals and is more effective in inhibiting microbial growth. Note de contenu : - EXPERIMENTAL : Materials - Methods - RESULTS AND DISCUSSION : Antibacterial activity of copper nanoparticles - Mechanism of bacterial killing - Antifungal activity of copper nanoparticles - Table 1 : Color fastness values of control leather and leather finished using copper nanoparticles - Table 2 : L*a*b* values of control leather and leather retanned using copper nanoparticles - Table 3 : Strength properties values of control leather and leather retanned using copper nanoparticles - Table 4 : Color fastness values of control leather and leather finished using copper nanoparticles DOI : https://doi.org/10.34314/jalca.v118i12.8252 En ligne : https://drive.google.com/file/d/13DmKqLEIwr0TYx0bvHPE-9XCtvA0UiPG/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40271 [article]

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Fungal deterioration on ancient leather artifacts / Zonghuan Ba in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVIII, N° 12 (12/2023)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXVIII, N° 12 (12/2023) . - p. 529-535 Titre : Fungal deterioration on ancient leather artifacts Type de document : texte imprimé Auteurs : Zonghuan Ba, Auteur ; Zhang Mingrui, Auteur ; Yulong Chen, Auteur ; Yizhe Cao, Auteur ; Zhuofan Hu, Auteur Année de publication : 2023 Article en page(s) : p. 529-535 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Antiquités (objets anciens) -- Analyse Cuirs et peaux -- Détérioration Détérioration fongique Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Fungal deterioration of ancient leather artifacts is a significant problem for museums and archives, as it might cause significant damage to the valuable cultural heritage. The growth of fungi on these artifacts is affected by such environmental factors as temperature, relative humidity, pH, and light exposure. The environmental factors that contribute to fungal growth and the impact fungi on the deterioration of ancient leather artifacts are discussed here. An overview is summarized on the strategies to prevent and control fungal deterioration, including the environmental control, the use of biocides, and conservation treatments, which is proposed to provide a valuable guidance for the preservation of ancient leather artifacts. Note de contenu : - Factors affecting fungal growth - Fungi on ancient leather artifacts - Biodeterioration mechanisms of leather by fungi - Conservation and restoration - Table 1 : The optimal temperature of Aspergillus, Penicilium, Eurotium and Cladosporium - Table 2 : Fungi found on ancient leather artifacts associated with leather process DOI : https://doi.org/10.34314/jalca.v118i12.8261 En ligne : https://drive.google.com/file/d/1W-fjSYxQh0U36AvB7mVi1sglbZjpCM6d/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40272 [article]

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