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Biodegradability study of footwear soling materials in simulated compost environment / Moumita Mukherjee in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVI, N° 2 (02/2021)
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Titre : Biodegradability study of footwear soling materials in simulated compost environment Type de document : texte imprimé Auteurs : Moumita Mukherjee, Auteur ; T. Loganathan, Auteur ; Sujata Mandal, Auteur ; G. Saraswathy, Auteur Année de publication : 2021 Article en page(s) : p. 58-68 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Analyse morphologique
Analyse thermique
Caractérisation
Compostage
Cuirs et peaux -- Biodégradation
Essais (technologie)
Semelles
ThermogravimétrieIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Aim of the present study is to investigate the biodegradability and decomposing properties of footwear soling materials by standard biodegradability test method. Biodegradability tests were performed by aerobic exposure of the selected six soling materials to the soil matrix and measuring the degradation and decomposition occurred with time. All soling materials were characterized for physical and physicochemical properties such as weight loss, hardness, density, tensile strength, abrasion resistance, thermal and morphological properties before and after exposing to the simulated compost environment. In the present study, the end-of-life nature of footwear soling materials currently used by the footwear industries are explored, which will further emphasize the importance of development and use of biodegradable materials in the footwear manufacturing. Note de contenu : - MATERIALS : Compost composition
- METHOD
- CHARACTERIZATION
- RESULTS AND DISCUSSION : Physical properties - ATR-FTIR - Thermal analysis (TGA and DSC) - Morphological analysisDOI : https://doi.org/10.34314/jalca.v116i2.4236 En ligne : https://drive.google.com/file/d/1hGALbjVyBKtlnBf-tTq4WJSivbSx9XBY/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35309
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXVI, N° 2 (02/2021) . - p. 58-68[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 22600 - Périodique Bibliothèque principale Documentaires Disponible A novel approach for enhanced color intensity and uniformity in leather dyeing / Sujata Mandal in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIII, N° 6 (06/2018)
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Titre : A novel approach for enhanced color intensity and uniformity in leather dyeing Type de document : texte imprimé Auteurs : Sujata Mandal, Auteur ; Jayanthi Durga, Auteur ; G. Jothi, Auteur ; Malathy Jawahar, Auteur ; Chellappa Muralidharan, Auteur Année de publication : 2018 Article en page(s) : p. 176-182 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Analyse spectrale
Cuirs et peaux -- Teinture
Photostabilité
Résistance à l'abrasion
Résistance à la transpiration
Résistance aux frottements humides
Solidité de la couleurIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Dyeing is a significant process step in leather making that is carried out to enhance the aesthetics of the tanned hides and skins. Due to the heterogeneous nature of the skin matrix, obtaining leathers with consistent color is challenging. The present study describes application of hydrotalcite-like inorganic synthetic material (HTLM) during leather dyeing to bring color uniformity among leathers by maximizing the color intensity within the skin and among the skins processed in a batch. The HTLM has been used in an interim step between two phases of dyeing that enhanced shade intensity as well as color consistency through modification of the leather surface chemically. The efficacy of the HTLM for enhanced color intensity and uniformity in leather has been investigated. Influence of the HTLM on the physicals characteristics like, perspiration, color fastness to light and dry/wet rub are also studied. Note de contenu : - Materials
- Methods
- Color fastness testing. Fastness to dry and wet rub
- Fastness to light
- Perspiration
- Spectroscopic assessment of color intensity and uniformity
- Characterization of the HTLMEn ligne : https://drive.google.com/file/d/1CDZaPfJCQjnefo3Te9Sro4NC9GcEbmFv/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30686
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXIII, N° 6 (06/2018) . - p. 176-182[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 19986 - Périodique Bibliothèque principale Documentaires Disponible Root cause analysis of color migration in footwear : A case study / Sujata Mandal in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVIII, N° 4 (04/2023)
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Titre : Root cause analysis of color migration in footwear : A case study Type de document : texte imprimé Auteurs : Sujata Mandal, Auteur ; Ravi Banothu, Auteur ; R. Mohan, Auteur ; Kalarical Janardhanan Sreeram, Auteur Année de publication : 2023 Article en page(s) : p. 150-155 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Adhésifs en phase solvant
Caractérisation
Chaussures
Cuir teint
Décoloration
Défauts
Essais (technologie)
Frottements (mécanique)
Produits chimiques -- Migration
Solidité de la couleur
Tige de la chaussureIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : The phenomena of migration and/or bleeding of colorants are one of the major concerns for the footwear and leather goods industries. The migration/bleeding of the colorants from one component to the other has been observed in many cases that spoil the aesthetics of the product, which in turn leads to economic loss for the industries. In this research article, a typical case of color migration in leather footwear has been studied in depth for root-cause analysis of the migration problem. The leather used in the shoe upper (affected due to migration), the lining fabric, and the adhesive used in making the footwear were characterized by microscopic and spectroscopic techniques. The FTIR-ATR study revealed that the leather was finished with polyurethane-based coating, the lining fabric used was an aromatic polyester and the adhesive was natural rubber-based adhesive. Though the lining fabric was colorfast to rubbing, it released color in all the organic solvents generally used in natural rubber-based adhesive. Migration studies showed that migration of the colorant (black) from the lining material to the leather (white) happened only in the presence of the adhesive. In conclusion, the organic solvent present in the adhesive used in making the footwear was responsible for the color migration from the lining material to the attached leather. Finally, recommendations have also been made to avoid such problems of color migration in products made from a variety of multiple fabrics. Note de contenu : - EXPERIMENTAL : Materials - Characterization techniques
- RESULTS AND DISCUSSION : Microscopic and FTIR-ATR study - Color fastness to rubbing of the lining fabric - Color migration/bleeding tests of the lining fabric
- Table 1 : Values of grey cale rating for the lining and the standard cotton lawnDOI : https://doi.org/10.34314/jalca.v118i4.7205 En ligne : https://drive.google.com/file/d/1GNsWjuOMrNz-6bJkjGVZddPuLqDdKG9f/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39183
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXVIII, N° 4 (04/2023) . - p. 150-155[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 24030 - Périodique Bibliothèque principale Documentaires Disponible 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
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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
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Code-barres Cote Support Localisation Section Disponibilité 24447 - Périodique Bibliothèque principale Documentaires Sorti jusqu'au 14/05/2024