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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Ionic liquid functionalised nanoparticles based tanning system as a less chrome tanning approach / Inbasekar Chandrasekar in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVI, N° 1 (01/2021)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXVI, N° 1 (01/2021) . - p. 11-16 Titre : Ionic liquid functionalised nanoparticles based tanning system as a less chrome tanning approach Type de document : texte imprimé Auteurs : Inbasekar Chandrasekar, Auteur ; Nishad Fathima Nishter, Auteur Année de publication : 2021 Article en page(s) : p. 11-16 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Antibactériens Chrome Cuirs et peaux -- Propriétés organoleptiques Cuirs et peaux -- Propriétés physiques Essais dynamiques Liquides ioniques Morphologie (matériaux) Oxyde de cérium Stabilité thermique Tannage minéral Tannage dans lequel interviennent différents minéraux. Le plus répandu est le tannage aux sels de chrome, mais aussi à l’aluminium Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Nanoparticles due to their size and high reactivity towards collagen provide potential applications in the tanning process. The current study aims to investigate the potential of ionic liquid functionalized cerium oxide nanoparticles as a combination tanning agent with minimum utilization of the chromium. The experimental results indicate that the presence of nanoparticles increases the thermal stability from 62°C to 92°C. The physical strength and organoleptic characteristics of the nanoparticles-BCS tanned leather are on par with conventional chrome tanned leather. Antibacterial studies reveal that the leather tanned with nanoparticles shows improved antibacterial activity. Thus, nanoparticle based tanning system invokes a considerable array of interest as an alternative tanning process with minimal and efficient usage of chromium. Note de contenu : - EXPERIMENTAL SECTION : Materials - METHODS : Synthesis of cerium oxide nanoparticles - Pretanning leather process - Optimization of nanoparticles input - Analysis of tanning liquor - Analysis of thermal stability - Physical test characteristics - Evaluation of anti-bacterial property - Morphological analysis - Estimation of cerium oxide - RESULTS AND DISCUSSIONS : Effective nanoparticles input - Nanoparticles-BCS combination and conventional tanning system - Morphological studies - Physical strength characteristics - Anti-bacterial studies - Table 1 : Optimization of nanoparticles offer - Table 2 : Combinational and conventional tanning process - Table 3 : Characterization of conventional and nanoparticles-BCS combination tanning process - Table 4 : Physical strength characteristics of conventional and combination tanning - Table 5 : Orgnoleptic properties characteristics of conventional and combination tanning DOI : https://doi.org/10.34314/jalca.v116i1.4218 En ligne : https://drive.google.com/file/d/1yitMtagKEXioz15x0lufmRg9RNojyeez/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35116 [article]

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