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Allium cepa peel waste : A sustainable solution for antibacterial leather dyeing with gs powder mordanting / Sathya Ramalingam in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIX, N° 3 (03/2024)
[article]
Titre : Allium cepa peel waste : A sustainable solution for antibacterial leather dyeing with gs powder mordanting Type de document : texte imprimé Auteurs : Sathya Ramalingam, Auteur ; Swethashree Rajendran, Auteur ; Ambika Kumaresan, Auteur ; Gladstone Christopher Jayakumar, Auteur ; Alagumuthu Tamil Selvi, Auteur Année de publication : 2024 Article en page(s) : p. 107-118 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Antibactériens
Bacillus subtilis
Caractérisation
Colorants végétaux
Cuirs et peaux -- Propriétés organoleptiques
Cuirs et peaux -- Teinture
Déchets végétaux -- Recyclage
Escherichia coli
Extraction (chimie)
Oignons et constituants
Réflectance
Solidité de la couleur
Stabilité thermique
Taille des particulesIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Using natural dyes rather than synthetic dyes is an option that can be pursued to achieve sustainability in leather dyeing. The main disadvantage of natural dyeing is poor wet and dry rub fastness and the requirements of metal mordants for fixing. In this work, onion peel waste is the chosen raw material to produce natural dye for leather dyeing without metal mordant. Adding commercial syntans and vegetable tannins with the onion peel dye in the post tanning process produces good quality dyed leather without using any mordants. The optimal particle size of eco-friendly onion peel dye was extracted from onion peel (Allium cepa) using a modified aqueous extraction method. The extracted dye was examined by various instrumental techniques to characterize the functional groups by Fourier transform infrared spectroscopy (FT-IR), optical properties by UV-VIS spectrophotometry, size by Malvern Instruments, and thermal stability by Thermogravimetric Analysis (TGA). The results express the suitability for application in the leather dyeing process. The extracted dye was analysed for the antibacterial activity towards Bacillus subtilis and Escherichia coli, and the results revealed that the natural dye has an antibacterial effect Crust leather dyed only with extracted dye showed poor dye Note de contenu : - MATERIALS AND METHODS : Sample collection - Materials and methods - Preparation and extractio of dye - Characterization of the extrated dye - Anti-bacterial activity - Leather dyeing application - Photographic images of the leather surface and cross action - Measurement of reflectance of colored leather - Fastness property of colored leather - Dye leaching analysis - Dye exhaustion studies - Organoleptic properties
- RESULT AND DISCUSSION : Fourier Transformation Infrared Spectroscopy (FTIR) analysis - Thermal stability of onion peel dye - Particle size of the onion peel dye - Anti-bacterial activity - Natural dyeing with mordants - Optimisation of leather dyeing process using onion peel extract - Color coordinates measurement of dyed leathers - Color fastness measurement - The strength properties of the dyed leather - Dye leaching analysis - Orgnoaleptic properties measurement
- Table 1 : Post-tanning recipe for the production of garment type of leather
- Table 2 : Dyeing process mordanting with GS powder and phenolic syntan
- Table 3 : Color coordinates of the dyed leather
- Table 4 : Color fastness properties of the onion peel dye treated leather
- Table 5 : Strength properties of the onion peel dyed leatherDOI : https://doi.org/10.34314/racatm26 En ligne : https://drive.google.com/file/d/18QUv3NkhQoLrvZ1et8Gkzhh3yjwDEX9p/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40617
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Code-barres Cote Support Localisation Section Disponibilité 24535 - Périodique Bibliothèque principale Documentaires Disponible Effect of pigment-acrylic binder ratio on the surface and physical properties of resin finished leather / Suriya Madhan in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIX, N° 1 (01/2024)
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Titre : Effect of pigment-acrylic binder ratio on the surface and physical properties of resin finished leather Type de document : texte imprimé Auteurs : Suriya Madhan, Auteur ; Mishamo Wakaso, Auteur ; Sathya Ramalingam, Auteur ; Swarna Vinodh Kanth, Auteur Année de publication : 2024 Article en page(s) : p. 20-30 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Adhésion
Angle de contact
Cuirs et peaux -- Finition
Cuirs et peaux -- Propriétés mécaniques
Cuirs et peaux -- Propriétés organoleptiques
Cuirs et peaux -- Propriétés physiques
Formulation (Génie chimique)
Liants
PolyacryliquesIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : The current study attempts to investigate the surface phenomenon and physical characteristics of leather finished with brown pigment and different types of acrylic binders. Using the contact angle measurements of three different liquids on the above finished leathers and films, the surface energy and work of adhesion were evaluated. The pigment to acrylic binder ratio (PABR) for best adhesion of finish film on the leather surface was optimized using the contact angle goniometer. Different types of acrylic binder films were coated and their surface behaviour was studied. The crust leather was coated with different types of pigment-acrylic binder (Very Soft, Soft and Medium Soft) finish formulations. The contact angle of both the acrylic films and the PABR finished leathers were measured against Water, Dimethyl sulfoxide (DMSO) and Hexadecane (HD). According to the study’s results, the surface properties of finished leather were directly related to the degree of wetting. The PABR was found to be effective at 1:3 for very soft binder, 1:2.5 for soft, 1:2 for medium soft binders due to higher contact angle and lower surface energy values (γsv). At 1:3 and 1:2.5, the contact angle of very soft and soft binder leather was 82.62° and 83.45° and for medium soft binder it was 82.67° at 1:2 ratio. The surface energy values of optimized PABR of very soft binder (1:3) was 28.29 (mN/M), soft binder (1:2.5) was 27.50 (mN/m) and medium soft binder (1:2) was 29.27 (mN/m). The optimized PABR work of adhesion values of very soft binder, soft binder and medium soft binder was 82.15 (mJm-2), 81.11 (mJm-2), 82.09 (mJm-2). In order to correlate the observed surface properties with leather finish properties, finished leathers were tested for finish adhesion, vamp flexing value, water vapour permeability, wet and dry rub fastness. According to the water vapour permeability, soft and medium binder showed good permeation due to the uncovering of nanopores. But the adhesion, grain crack resistance and grain smoothness were higher in the case of the soft binder. Overall leather properties divulges that the pigment to binder ratio and the type of binder plays an important role in surface properties of the finished leather. This study enables us to determine the optimal PABR for effective finish properties to meet the required leather standards for various usage, as well as better utilisation of finishing chemicals. Note de contenu : - MATERIALS AND METHOD : Materials - method : Finish formulation preparation - Finished upper leather preparation - Acrylic binder film preparation - Determination of contact angle - Measurement of work of adhesion - Measurement of adhesion of finish - Determination of flexing endurance - Determination of wet and dry rub fastness - Determination of water-vapor permeability - Determination of physical strength characteristics - Determination of organoleptic properties
- RESULTS AND DISCUSSION : Contact angle and surface energy and work of adhesion parameters of different acrylic binder films - Correlation between surface energy and work of adhesion parameters for various PABR of very soft binder - Correlation between surface energy and work of adhesion parameters for various PABR of soft binder - Correlation between surface energy and work of adhesion parameters for various PABR of medium soft binder - Water vapor permeability - Finish adhesion properties of finished leather - Organoleptic properties analysis
- Table 1 : Characteristics of the binder chosen for finishing application
- Table 2 : Finish formulations prepared at a varied concentration of different acrylic binder
- Table 3 : Contact angle and surface energy and work of adhesion value for binder coated on a microscopic slide
- Table 4 : Contact angle and surface energy and work of adhesion values for vaious PABR of very soft binder
- Table 5 : Contact angle and surface energy and work of adhesion values for various PABR of soft binder
- Table 6 : Contact angle and surface energy and work of adhesion values for various PABR of medium soft binder
- Table 7 : Adhesion properties of optimum PABR of various binder
- Table 8 : Organoleptic properties of optimum PABR of various binderDOI : https://doi.org/10.34314/jalca.v119i1.8291 En ligne : https://drive.google.com/file/d/1W93p1wv9mAcBRQf17cZQViw7-2kk6Jpb/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40346
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Code-barres Cote Support Localisation Section Disponibilité 24402 - Périodique Bibliothèque principale Documentaires Disponible Electrochemical oxidation and reuse of pickling wastewater from tanneries / S. Sundarapandiyan in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CIII, N° 11 (11/2008)
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Titre : Electrochemical oxidation and reuse of pickling wastewater from tanneries Type de document : texte imprimé Auteurs : S. Sundarapandiyan, Auteur ; Chandra Babu Narasimhan Kannan, Auteur ; Sathya Ramalingam, Auteur ; M. C. K. Dhanaselvan, Auteur ; G. Rajeswari, Auteur Année de publication : 2008 Article en page(s) : p. 370-376 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Reuse of pickling wastewater after treating it electrochemically has been studied. Pickling wastewater has been neutralised to pH 7.0 and subjected to electrooxidation. electrooxidation has been carried out using graphite electrodes at a current density of 0.012 A/cm2 for 2 hrs. Pickling wastewater has been analysed prior to and after the treatment. Treated wastewater has been reused and the cycle continued for seven times. The pickled pelts were chrome tanned and further converted into crust leathers. Shrinkage temperature, chromium uptake and chromium distribution of wetblue were tested. Crust leathers were tested for physical chrateristics. Characteristics of treated pickling wastewater indicated that electrooxidation reduced the pollution load in terms of COD and TKN significantly. Results indicated that the recycling did not influence the characteristics of wetblue and crust leathers. En ligne : https://drive.google.com/file/d/1pKcBpKpTSRF0WGazL5Q7fREOTfKvveX7/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3023
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Code-barres Cote Support Localisation Section Disponibilité 010839 - Périodique Bibliothèque principale Documentaires Disponible Lignin based colorant : modified black liquor for leather surface coating application / P. Balasubramanian in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIII, N° 10 (10/2018)
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Titre : Lignin based colorant : modified black liquor for leather surface coating application Type de document : texte imprimé Auteurs : P. Balasubramanian, Auteur ; Sathya Ramalingam, Auteur ; Mohammed Javid, Auteur ; Jonnalagadda Raghava Rao, Auteur Année de publication : 2018 Article en page(s) : p. 311-317 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Calorimétrie
Caractérisation
Colorants
Colorimétrie
Cuirs et peaux -- Finition
Cuirs et peaux -- Teinture
Déchets industriels -- Recyclage
Formulation (Génie chimique)
Fourier, Spectroscopie infrarouge à transformée de
LignineLa lignine est un des principaux composants du bois, avec la cellulose, l'hémicellulose et des matières extractibles. La lignine est présente principalement dans les plantes vasculaires et dans quelques algues. Ses principales fonctions sont d'apporter de la rigidité, une imperméabilité à l'eau et une grande résistance à la décomposition. Toutes les plantes vasculaires, ligneuses et herbacées, fabriquent de la lignine. Quantitativement, la teneur en lignine est de 3 à 5 % dans les feuilles, 5 à 20 % dans les tiges herbacées, 15 à 35 % dans les tiges ligneuses. Elle est moindre pour les plantes annuelles que pour les vivaces, elle est maximum chez les arbres. La lignine est principalement localisée entre les cellules (voir parois pectocellulosiques), mais on en trouve une quantité significative à l'intérieur même de celles-ci. Bien que la lignine soit un réseau tridimensionnel hydrophobe complexe, l'unité de base se résume essentiellement à une unité de phénylpropane. La lignine est le deuxième biopolymère renouvelable le plus abondant sur la Terre, après la cellulose, et, à elles deux, elles cumulent plus de 70 % de la biomasse totale. C'est pourquoi elle fait l'objet de recherches en vue de valorisations autres que ses utilisations actuelles en bois d'œuvre et en combustible.
Voie de biosynthèse : La lignine est une molécule dont le précurseur est la phénylalanine. Cet acide aminé va subir une cascade de réactions faisant intervenir une dizaine de familles d'enzymes différentes afin de former des monolignols. Ces enzymes sont : phénylalanine ammonia-lyase (PAL), cinnamate 4-hydroxylase (C4H), 4-coumarate:CoA ligase (4CL), hydroxycinnamoyl-CoA shikimate/quinate hydroxycinnamoyl transferase (HCT), p-coumarate 3-hydroxylase (C3H), caffeoyl-CoA o-methyltransferase (CCoAOMT), cinnamoyl-CoA reductase (CCR), ferrulate 5-hydroxylase (F5H), caffeic acid O-methyltransferase (COMT) et cinnamyl alcohol deshydrogenase (CAD). Dans un certain nombre de cas, des aldéhydes peuvent également être incorporés dans le polymère.
Lumière -- Diffusion
Pigments
Réflectance
Revêtement de surface
Séparation (technologie)
Sol-gel, Procédé
ThermogravimétrieIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Nowadays, much research is focused towards the development of a value-added products from industrial waste. In this concern, the preparation of pigment colorant with good covering power from the paper and pulp industry waste is less explored within the leather world. The paper and pulp industry generate huge quantity of waste, which is commercially known as black liquor. In order to prepare the pigments with good covering property the black liquor was acidified, and the insoluble organic part of black liquor was used for pigment application. In this work, the structural characterization of the prepared pigment products was analyzed by FT-IR, TGA, DSC, BET, SEM and DLS. Further sol-gel method was employed for the preparation of pigment formulation using the insoluble lignin obtained from the black liquor. The applicability of isolated insoluble as brown pigment was evaluated by using it as pigment for leather surface coating. The color characteristics of the pigment coated leather and checkered card were analyzed by using CIELAB color measurement. The results obtained clearly confirm that the insoluble lignin has potential application as a brown pigment in leather finishing application and is compatible with various auxiliaries employed in leather finishing. Utilization of the prepared brown pigment in leather finishing resulted in upgradation of finished leather through excellent surface covering and in addition, no overloading of grain was observed. Thus, this article provides an approach for converting waste black liquor from paper and pulp industry into a value-added material for pigment application. Note de contenu : - MATERIALS AND METHODS : Separation of lignin based pigment from black liquor - Characterization of separated lignin FT-IR analysis - Thermogravimetric analysis and differential scanning calorimetry - Bruner Emmet Teller (BET) surface area measurements - Scanning electron microscopy - Dynamic light scattering measurement - Pigment formulation for leather finishing application - Mass tone of hiding power of the pigment - Characterization of the finished leather -
- RESULTS AND DISCUSSION : Characterization of the separated insoluble lignin from black liquor - BET surface area measurement - Scanning Electron Microscopic (SEM) analysis - Mass tone of hiding power - Application of lignin based pigment for leather surface coating - Reflectance measurements of pigment coated leather - Determination of fastness propertiesEn ligne : https://drive.google.com/file/d/1sFK4Pd3Z4ogugF6-1ruhcXGdOuI81A4b/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31090
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Code-barres Cote Support Localisation Section Disponibilité 20280 - Périodique Bibliothèque principale Documentaires Disponible Natural sunlight assisted bentonite-ZnO mixed oxide catalyst for organic pollutant removal in leather post tanning wastewater with solar reactor / E. T. Deva Kumar in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIII, N° 8 (08/2018)
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Titre : Natural sunlight assisted bentonite-ZnO mixed oxide catalyst for organic pollutant removal in leather post tanning wastewater with solar reactor Type de document : texte imprimé Auteurs : E. T. Deva Kumar, Auteur ; Sathya Ramalingam, Auteur ; K. Thirumalai, Auteur ; Rathinam Aravindhan, Auteur ; M. Swaminathan, Auteur ; Jonnalagadda Raghava Rao, Auteur Année de publication : 2018 Article en page(s) : p. 241-247 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Bentonite La bentonite est une argile colloïdale dont le nom vient de Fort Benton dans le Wyoming aux États-Unis. Connue aussi sous le terme de terre à foulon, elle peut être considérée comme une smectite, étant essentiellement constituée de montmorillonite (Na,Ca)0.33(Al,Mg)2Si4O10(OH)2·(H2O)n.(80 %) et d'argile ce qui explique sa capacité de rétention d'eau. On trouve également d'autres minéraux comme le quartz, le mica, le feldspath, la pyrite ou la calcite. Les gisements de bentonites sont d'origines volcanique et hydrothermale.
Elle possède diverses propriétés. Notamment, elle absorbe les protéines, réduit l’activité des enzymes. Les boues bentonitiques (recelant une fraction de bentonite) sont utilisées dans les travaux de terrassement, de parois moulées, du fait de leur capacité à laisser la place rapidement et facilement aux bétons coulés à leur place. Elles peuvent être ajoutées au compost.
Le numéro CAS de la bentonite est 1302-78-9.
Il existe deux types de bentonites :
La bentonite à base de sodium, qui augmente de volume lorsqu'elle est humide et qui peut absorber plusieurs fois sa masse en eau. Cette propriété est mise en valeur dans les mastics pour l'enfouissement de matières polluantes dans le sol. Elle est utilisée dans les puits de forage de pétrole et la recherche géothermique.
La bentonite à base de calcium (pascalite), qui ne possède pas ces propriétés de gonflement, a des applications parapharmaceutiques dont les résultats restent à prouver, notamment dans le domaine du système digestif. Des tribus indigènes d'Amérique du Sud, d'Afrique et d'Australie ont longtemps employé l'argile de bentonite pour cet usage.
En raison de ses fonctionnalités rhéologiques, la bentonite a un comportement thixotrope. Des petites quantités de bentonite en solution aqueuse forment un mélange visqueux, dont la viscosité baisse lorsque l'effort mécanique qui lui est appliqué augmente.
Catalyseurs
Cuirs et peaux -- Industrie -- Aspect de l'environnement
Eaux usées -- Epuration
Eaux usées -- Recyclage
Oxyde de zinc
Photocatalyse
Polluants organiques -- DétériorationIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Organic pollutants in leather post tanning wastewater were degraded by the advanced oxidation process using semiconductive photocatalysis technique. A mixed oxide nanocatalyst Bentonite-ZnO was employed for the degradation process and the same has been prepared by hydrothermal method. The morphological and optical characteristics of the nanocatalyst was well characterized by using X-ray diffraction (XRD), Scanning Electron Microscope (SEM), Diffuse Reflectance Spectroscopy (DRS) and Fluorescence Spectrophotometer studies. The diffraction peak of the mixed oxide catalyst confirms the formation of wurzite structure of ZnO with the incorporation of bentonite clay particles. The SEM image displayed the formation of nanosized particles with porous spherical texture. The optical band gap of the bare ZnO (3.3 eV) and Bentonite-ZnO (2.5eV) catalysts were measured by DRS studies. A comparative study of photoluminescence spectra of ZnO and Bentonite-ZnO showed the suppression of charge carrier recombination in case of Bentonite-ZnO than bare ZnO. Existence of suitable charge carriers and vectorial transportation between bentonite and ZnO makes Bentonite-ZnO as an appropriate catalyst for degradation of organic pollutants present in leather post tanning liquor. The semiconductive photocatalysis on leather tannery post tanning wastewater was carried out in a specially designed pilot scale solar light reactor with Bentonite-ZnO, the results are compared with bare ZnO catalyst, where the degradation property with mixed oxide catalyst Bentonite-ZnO is better than bare ZnO. The decrease in COD with Bentonite-ZnO nanocatalyst is found to be 35.3% for three hours of continuous reaction under solar light. Such percentage of COD reduction suggest to offer this nanocatalyst treatment as preliminary step for better performance of further treatment process. Note de contenu : - MATERIALS AND METHODS : Materials - Preparation of bentonite-ZnO mixed oxide catalyst - Photocatalytic treatment of post-tanning wastewater
- RESULTS AND DISCUSSION : X-ray diffraction studies - UV-visible reflectance spectroscopy - Photoluminescence study - Effect of pH on the activity - Photocatalytic degradation under solar lightEn ligne : https://drive.google.com/file/d/1lUVJXMxJA9QXQ1m_E5gKqxJXPuJIBnDn/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30840
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Code-barres Cote Support Localisation Section Disponibilité 20115 - Périodique Bibliothèque principale Documentaires Disponible A novel water dispersable bentonite - acrylic graft copolymer as filler cum retanning agent / Y. Lakshminarayana in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCVII, N° 1 (01/2002)
PermalinkPolyanionic bio-emulsifier : a heteropolysaccharide based bio-composite for leather post tanning process / Sharmila Selvaraju in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIV, N° 3 (03/2019)
PermalinkSuccessful use of remnant : attractive reversible grain pattern / Murali Sathish in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXII, N° 1 (01/2017)
PermalinkTone in tone dyeing : attempt to use dye encapsulated silica nanospheres in leather dyeing / Sathya Ramalingam in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIII, N° 12 (12/2018)
PermalinkUse of seawater in leather processing / N. Vedaraman in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCVIII, N° 9 (09/2003)
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