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Sustainable finished leather preservation / Ruby Shekinah in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIX, N° 2 (02/2024)
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Titre : Sustainable finished leather preservation : Part I - Myrobalan capped copper nanoparticles Type de document : texte imprimé Auteurs : Ruby Shekinah, Auteur ; Saranya Kailasam, Auteur ; Sujata Mandal, Auteur ; Swarna Vinodh Kanth, Auteur Année de publication : 2024 Article en page(s) : p. 55-63 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Antibactériens
Cuirs et peaux -- Conservation
Cuirs et peaux -- Finition
Cuivre
Formulation (Génie chimique)
Myrobalan et constituants
Nanoparticules
Nanoparticules -- Synthèse
Produits de conservation du cuir
Réduction (chimie)
RevêtementsIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Copper nanoparticles were synthesized using myrobalan (tannin) extract as a reducing agent. The synthesized nanoparticles were used in the coating of leather after the finishing process of upper leather to enhance the antimicrobial properties of leather. Primarily, the synthesized myrobalan copper nanoparticles (M-CuNPs) were characterized using UV-Spectroscopy (UV), which resulted in an absorption peak at 412 nm, confirming the presence of CuNPs in the solution. The size distribution and zeta potential values of M-CuNPs were analyzed by Dynamic Light Scattering (DLS) which resulted in an average particle size of 104 nm and zeta potential value of -28mv. These values affirm the stability of the M-CuNPs. Scanning Electron Microscope (SEM) image showed that the particles are spherical in shape. The elemental composition of M-CuNPs was confirmed using Energy dispersive X-ray (EDX) studies. Fourier transform infrared (FTIR) spectra showed peaks at 3173 cm-1, 1727 cm-1, 1147 cm-1, and 624 cm-1, which correspond to -OH, C=O, C-O, and C-H respectively confirming functional groups involved in the synthesis and capping process. The antibacterial activity of the M-CuNPs coated finished leather was evaluated against Grampositive (Bacillus subtilis) and Gram-negative (Serratia marcescens) bacteria, which are common pathogenic species that effect the preservation capabilities of the leather. The M-CuNPs coated finished leather exhibits strong antimicrobial activity against both Gram-positive (Bacillus subtilis) and Gram-negative (Serratia marcescens) bacteria. Hence from the above study, M-CuNPs can be used as a sustainable antibacterial agent for preserving leather and its products. Note de contenu : - MATERIALS AND METHOD : Materials - Preparation of tannin extraction - Synthesis of M-CuNPs - Characteristics of M-CuNPs - Methodology of leather nanocoatings - Antibacteial assay of M-CuNPs - Effect of copper nanoparticles on growth of bacteria - Antibacterial evaluation of M-CuNPs coated leather
- RESULTS AND DISCUSSION : Antibacterial activity of M-CuNPs - Antibacterial mechanism of copper nanoparticles
- Table 1 : Resin finish formulation
- Table 2 : Antibacterial activity of the synthesized M-CuNPsDOI : https://doi.org/10.34314/jalca.v119i2.8322 En ligne : https://drive.google.com/file/d/1Sj4vOJh9ztiOGhfz1DgCXCot8I0WENEA/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40465
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXIX, N° 2 (02/2024) . - p. 55-63[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 24447 - Périodique Bibliothèque principale Documentaires Sorti jusqu'au 14/05/2024 Sustainable finished leather preservation / Ruby Shekinah in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIX, N° 2 (02/2024)
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Titre : Sustainable finished leather preservation : Part II - Wattle tannin capped copper nanoparticles Type de document : texte imprimé Auteurs : Ruby Shekinah, Auteur ; Saranya Kailasam, Auteur ; Sujata Mandal, Auteur ; Swarna Vinodh Kanth, Auteur Année de publication : 2024 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Acacia et constituants
Antibactériens
Caractérisation
Cuirs et peaux -- Conservation
Cuivre
Extraction (chimie)
Nanoparticules -- Synthèse
Produits de conservation du cuir
Tanins végétauxIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Part 1 of the current paper described the green synthesis of myrobalan capped copper nanoparticles for the preservation of the finished leather. In Part II of the current study, Copper Nanoparticles (CuNPs) were synthesized using green synthesis with wattle (tannin) extract as a reducing agent. Green synthesis is the preferred approach for the synthesis of metal nanoparticles due to its eco-friendly and cost-effectiveness for the preservation of finished leather. To improve the antibacterial qualities of leather with different types of finishes, the resin finished leather was coated with synthesized wattle copper nanoparticles (W-CuNPs). The chemical constituents of wattle induce the reduction of Cu2+ ions to CuNPs with the capping process and also remain as a stabilizing agent for the capping process. The formation of W-CuNPs was confirmed by UV-Spectroscopy at an absorbance of 467 nm. The identified functional groups such as -OH, C=C, and C-N were analyzed by Fourier transform infrared spectrum (FT-IR) which are responsible for the reduction and stabilization of copper nanoparticles. The spherical shape of the nanoparticles was ascertained by Scanning Electron Microscope (SEM), whereas Energy dispersive X-ray (EDX) studies confirmed the presence of copper with 65%. The average particle size of W-CuNPs was found to be 96 nm. The zeta potential value of -24 mv affirmed the stability of the W-CuNPs. The maximum zone of inhibition was 12 mm against Gram-positive (Bacillus subtilis) and 11 mm against Gram-negative (Serratia marcescens) bacteria on W-CuNPs coated finished leather, which exhibits strong antimicrobial activity. Hence, CuNPs synthesized by wattle extract have the potential to preserve the finished leather and its products as an antibacterial agent. Note de contenu : - MATERIALS AND METHODS : Preparation of tannin extraction - Synthesis of W-CuNPs - Characterization of W-CuNPs - Methodology of leather nanocoatings - Antibacterial assay of W-CuNPs and W-CuNPs coated leather - Effect of copper nanoparticles on growth of bacteria
- RESULTS AND DISCUSSION : UV-visible spectroscopy of w-CuNPs - Particle size distribution of W-CuNPs - Functional group analysis of W-CuNPs - Morphology and size of W-CuNPs - Antibacterial activity of W-CuNPs
- Table 1 : Antibacterial activity of the synthesized W-CuNPsDOI : https://doi.org/10.34314/jalca.v119i2.8323 En ligne : https://drive.google.com/file/d/1HvhiGDIyGSW4y29rKyK9k40TsJzHnT_O/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40466
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXIX, N° 2 (02/2024)[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 24447 - Périodique Bibliothèque principale Documentaires Sorti jusqu'au 14/05/2024