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Adding value to tannery fleshings : Part I - Oils and protein hydrolysates - Production and application / I. Bragança in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 97, N° 2 (03-04/2013)
[article]
Titre : Adding value to tannery fleshings : Part I - Oils and protein hydrolysates - Production and application Type de document : texte imprimé Auteurs : I. Bragança, Auteur ; A. Crispim, Auteur ; A. Sampaio, Auteur ; E. Ramalho, Auteur ; F. Crispim, Auteur ; N. S. Caetano, Auteur ; P. C. Silva, Auteur Année de publication : 2013 Article en page(s) : p. 62-67 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cuirs et peaux -- Déchets -- Recyclage
Cuirs et peaux -- Propriétés mécaniques
Déchets -- Valorisation
Echarnage
Extraction (chimie)
Glutaraldéhyde
Huiles et graisses
Hydrolysats de protéines
Hydrolyse
Produits de nourriture du cuir
Protéines
SulfatesLe sulfate est le sel de l'acide sulfurique H2SO4. La formule de l'ion sulfate est SO42-.
TannageIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : The tanning industry generates a high quantity of solid wastes. Therefore, there is a need to create valorization [added value] options for these wastes. The present work had as its main objective creating added value by production of fat and hydrolyzed protein. To this end, fleshings were treated by hydrolysis with regard to the influence of various factors. The best result was found for a temperature of 60°C, 4 hours of hydrolysis, 2% of enzyme and 100% of water, with a fat extraction yield of 93%.
The fat obtained through the hydrolysis process was used to produce sulphated oils. The protein hydrolysate was concentrated to about 40% of solids content and used to prepare co-products of protein hydrolysage and glutaraldehyde.
Sulphated oils were applied in leather fatliquoring and the different protein hydrolysates were tested in leather retannage. The leather samples obtained were evaluated by physical-mechanical tests and the results were compared to those obtained through a standard process. the results were very satisfactory and, in some cases better than the specified standard.
The process of adding value to this waste results in a double advantage for the leather industry, reducing the environmental impact and allowing production of alternative products for leather fatliquoring and retannage.Note de contenu : - MATERIALS AND METHODS : Fat extraction - Oil production - Hydrolysate treatment - Leather treatment and evaluation - Fat extraction - Oil production - Hydrolysate treatment - Leather treatment and evaluation En ligne : https://drive.google.com/file/d/1L81N_8EBYtQFg4_VzHytHtl0U2zipgd1/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18143
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 97, N° 2 (03-04/2013) . - p. 62-67[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 14986 - Périodique Bibliothèque principale Documentaires Disponible Alternative fungicides for the leather industry : application in various processes / Sara Cuadros in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 96, N° 6 (11-12/2012)
[article]
Titre : Alternative fungicides for the leather industry : application in various processes Type de document : texte imprimé Auteurs : Sara Cuadros, Auteur ; M. Angels Manresa, Auteur ; Joaquim Font, Auteur ; M. Elena Bautista, Auteur ; Rita Puig, Auteur ; Agusti Marsal, Auteur Année de publication : 2012 Article en page(s) : p. 225-233 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Concentration minimale inhibitrice (antimicrobiens) En microbiologie, la concentration minimale inhibitrice (CMI) est la plus faible concentration d'un produit chimique, généralement un médicament, qui empêche la croissance visible d'une ou de plusieurs bactéries. La CMI dépend du micro-organisme considéré, de l'être humain affecté (in vivo uniquement) et de l'antibiotique lui-même.
La CMI est déterminée en préparant des solutions du produit chimique in vitro à diverses concentrations croissantes, en incubant les solutions avec des groupes séparés de bactéries en culture et en mesurant les résultats en utilisant une méthode de dilution standardisée (agar ou microdilution). Les résultats se classent ensuite comme "sensible", "intermédiaire" ou "résistant" à un antimicrobien particulier en utilisant un point d'arrêt. Les points d'arrêt sont des valeurs convenues, publiées dans les directives d'un organisme de référence, comme le US Clinical and Laboratory Standards Institute (CLSI), la British Society for Antimicrobial Chemotherapy (BSAC) ou le Comité européen sur les tests de sensibilité aux antimicrobiens (EUCAST). On a pu constater des écarts importants au niveau des points d'arrêt de divers pays européens au fil des ans, et entre ceux de l'EUCAST et du CLSI.
Alors que la CMI est la concentration la plus faible d'un agent antibactérien nécessaire pour inhiber la croissance visible, la concentration bactéricide minimale (CBM) est la concentration minimale d'un agent antibactérien qui entraîne la mort bactérienne. Plus la CMI est proche de la CBM, plus le composé est bactéricide.
La première étape de la découverte d'un médicament est souvent le dépistage d'un médicament candidat de banque de données pour les CMI contre les bactéries d'intérêt. En tant que tels, les CMI sont généralement le point de départ pour de plus grandes évaluations précliniques de nouveaux agents antimicrobiens. Le but de la mesure de la concentration minimale inhibitrice est de s'assurer que les antibiotiques sont choisis efficacement pour augmenter le succès du traitement. (Wikipedia)
Cuirs et peaux -- Conservation
Fongicides -- Suppression ou remplacement
Produits de nourriture du cuir
Wet-blue (tannage)Peau tannée au chrome (le chrome donne une couleur bleue)Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Increasingly stringent environmental legislation and indispensable use of fungicides in the tanning industry obliges tanners to adapt their processes to alternative technologies with lower environmental impact, including the search for new fungicide systems that comply with those rules.
The fungicidal capacities of alternative compounds diiodomethyl p-tolylsulfone (DIMPTS), 3-iodo-2-propynyl N-butylcarbamate (IPBC) and thiabendazole/2-Thiazol-4-yl-1H-benzo imidazole (TBZ) were compared to those of conventional fungicides, 2-(thiocyanomethylthio)-1,3-benzothiazole (TCMTB) and the mixture of phenolic compounds). This fungicidal capacity was evaluated against different strains of fungi in different processes. Fungicides were applied in the chrome tanning process, fatliquoring of hides tanned with vegetable extracts and a preservative pickling process. Further studies consisted of a microbiological control samples inoculated with fungi common in tannery, determination of the fungicide content on the skin, and a toxicity study of process wastewater.
The results obtained in an earlier work and the higher antifungal capacity of DIMPTS and IPBC in the different processes, supported the possibility of using them in the leather sector.
The skins produced using alternative fungicides showed no stains or other defects, and in relation to the environmental impact, toxicity from wastewater was lower in the case of the alternative products against those commonly used.Note de contenu : - AIM OF THE WORK
- EXPERIMENTAL PROCEDURES : Materials - Isolation and identification of fungi from contaminated hides - Determinationof Minimum Inhibitory Concentration (MIC) - Application of fungicides in three processes : wet-blue tanning process, fatliquoring process of vegetable leather and preservative pickling process
- RESULTS AND DISCUSSION : Determination of Minimum Inhibitory Concentration (MICs) - Application of fungicides in three processes : wet-blue tanning process, fatliquoring process of vegetable leather and preservative pickling processEn ligne : https://drive.google.com/file/d/1vShF6OyeAyqp8_1jJDtCls2wXVIElndH/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16801
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Code-barres Cote Support Localisation Section Disponibilité 14414 - Périodique Bibliothèque principale Documentaires Disponible An effective way to prepare high performance biomass-based fatliquoring agent - Bromination modification of rapeseed oil and its fatliquoring and flame-retardant properties / Tao Luo in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVIII, N° 8 (08/2023)
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Titre : An effective way to prepare high performance biomass-based fatliquoring agent - Bromination modification of rapeseed oil and its fatliquoring and flame-retardant properties Type de document : texte imprimé Auteurs : Tao Luo, Auteur ; Xu Zhang, Auteur ; Biyu Peng, Auteur ; Chunxiao Zhang, Auteur ; Sadaqat Ali Chattha, Auteur Année de publication : 2023 Article en page(s) : p. 346-353 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Absorption
Analyse sensorielle
Biomasse
BromationSubstitution dans une molécule d'un atome d'hydrogène par un atome de brome.
Combustion
Croûte (cuir)On entend par "cuir en croûte" des cuirs ayant subi les opérations jusqu'au tannage, à l'exclusion de toute opération de corroyage ou de finissage, mais qui, par opposition aux wet-blue ont été séchés.
Cuirs et peaux -- Analyse
Douceur (toucher)
Essais accélérés (technologie)
Essais de résilience
Fourier, Spectroscopie infrarouge à transformée de
Huile de colza
IgnifugeantsComposé chimique utilisé pour réduire l'inflammabilité. Il peut être incorporé au produit durant sa fabrication ou appliqué ultérieurement à sa surface.
Produits de nourriture du cuirIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : With the implementation of Carbon Neutralization strategy, it is urgently needed to develop low-carbon leather chemicals through replacing petrochemicals with biomass-based raw materials in leather industry. To solve the problems existing in the leather fatliquored by the biomass-based fatliquoring agents made from vegetable oils with high unsaturation, such as poor storability, unpleasant odor, yellowing and possible formation of hexavalent chromium, the strategy was put forward, improving the oil saturation through the double bonds addition reaction with halogen to solve the abovementioned problems resulting from the poor oxidation resistance of oil, and increase the binding ability of the oil with leather fibers and endow the leather with flame-retardant simultaneously. In this paper, the methods of modified rapeseed oil by bromine addition and its fatliquoring and flame-retardant properties were studied. The results showed that the bromine addition reaction of rapeseed oil was easy to proceed and the iodine value of the modified oil decreased almost linearly with the added amount of bromine. The binding and antioxidant properties of the oil and the physical properties of the fatliquored leather were significantly improved with the increase degree of bromination modification. Furthermore, above mentioned unpleasant odor, yellowing and hexavalent chromium formation problems were effectively solved when the iodine value of modified fatliquors was reduced to 31 g I2/100 g. Additionally, brominemodified rapeseed oil could endow leather with good flame-retardant properties and the fatliquored leather was changed from combustible to flame-retardant material with the increasing amount of bromine in the oil. The limit oxygen index (LOI) increased from 24% to 31%, the flame combustion time decreased from 127.0 s to 4.3 s, and the flameless combustion time decreased from 28.5 s to 0.0 s. This study provided an effective way to develop biomass-based and low-carbon fatliquors based on natural unsaturated oils. Note de contenu : - MATERIALS AND METHODS : Materials - Bromination modification of rapessed oil - Preparation of leather fatliquoring agent - Application of fatliquors in the fatliquoring process - Determination of the iodine value of oils - Fourier Transform Infrared Spectroscopy (FT-IR) of oils - Absorption rate of fatliquors - Distribution of Br element and collagen fibers - Binding ability of modified oils with leather fibers - Limiting oxygen index (LOI) test of crust leather - Vertical combustion test of crust leather - Ageing test of crust leather - Odor level evaluation of crust leather - Yellowing resistance property of crust leather - Softness and physical properties of crust leather
- RESULTS AND DISCUSSION : Preparation and characterization of bromine-modified rapessed oil - Absorption rate of oil and its distribution in leather - Effect of rapessed oil modification degree on the properties of fatliquored leather
- Table 1 : Absorption rate of fatliquors
- Table 2 : Oil extraction test results
- Table 3 : Leather vertical combustion test results
- Table 4 : Leather softness test resultsDOI : https://doi.org/10.34314/jalca.v118i8.8092 En ligne : https://drive.google.com/file/d/12reqFQXSFwDRWiNVXr_pFHQVWb2biTpR/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39674
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Code-barres Cote Support Localisation Section Disponibilité 24134 - Périodique Bibliothèque principale Documentaires Disponible An experimental comparative study on silicone oil and polyethylene glycol as dry leather treatments / Alireza Koochakzaei in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXI, N° 10 (10/2016)
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Titre : An experimental comparative study on silicone oil and polyethylene glycol as dry leather treatments Type de document : texte imprimé Auteurs : Alireza Koochakzaei, Auteur ; Hossein Ahmadi, Auteur ; Mohsen Mohammadi Achachluei, Auteur Année de publication : 2016 Article en page(s) : p. 377-382 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Additifs
Antioxydants
Colorimétrie
Cuirs et peaux -- Conservation
Cuirs et peaux -- Propriétés mécaniques
Essais accélérés (technologie)
Huile de silicone
pH -- Mesure
Polyéthylène glycol
Produits de nourriture du cuir
Température de retrait
Vitamine CIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : The application of leather dressing and lubricants is one of the important challenges in conservation of historic dry leathers, due to their effects on structural and visual properties and stability of leathers. This study aimed to investigate influence and stability of silicone oil and polyethylene glycol (PEG) on treated dry leathers, and application assessment of ascorbic acid (AA) as an antioxidant additive for PEG. The polymers, untreated and treated leather samples were submitted to heat accelerated ageing process. FTIR spectroscopy, colorimetry, pH measurements, investigation of mechanical properties and shrinkage temperature (Ts) were used to explain effect of treatments. Also, the oxidation of polymers during ageing process was monitored by FTIR spectroscopy. Results showed that silicone oil has better stability against thermal oxidation with compared to PEG. Ascorbic acid inhibited the PEG oxidation. Moreover, results revealed that the silicone oil has a better performance in treatment of dry leather than PEG or PEG+AA, due to its high stability and minimum changes in visual, structural and mechanical properties in treated leathers. Note de contenu : - Accelerated aging of lubricants
- Leather treatment and accelerated aging - Colorimetry
- pH measurement
- ATR-FTIR spectroscopy
- Shrinkage temperature
- Mechanical propertiesEn ligne : https://drive.google.com/file/d/1kaMnDuI0gNV2r8Ix-H-sN-35-0UAjvN1/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27027
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Code-barres Cote Support Localisation Section Disponibilité 18365 - Périodique Bibliothèque principale Documentaires Disponible Analysis of leather oils / R. Craske in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 54, N° 9 (09/1970)
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Titre : Analysis of leather oils : Part 1. Separation procedures used in the study of sulphated oils Type de document : texte imprimé Auteurs : R. Craske, Auteur ; S. G. Humphries, Auteur Année de publication : 1970 Article en page(s) : p. 325-331 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Chimie analytique
huile de pied de bœuf
Huile de spermaceti
Huiles et graisses
Huiles et graisses animales
Huiles sulfatées
Oléate de sodium
Produits de nourriture du cuir
Séparation (technologie)Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : The development work described in this report summarises investigations which have been undertaken with a view to optimising the solvent fractiona-tion procedures. More valid information is presented regarding the principal component types in sulphated oils i.e. neutral ofi (NO), free fatty acids (FFA) and sulpho oil or emulsifier (SO). This is used as a basis for more detailed separations of the main fractions into individual identifiable components. Note de contenu : - Separation of the sulphated and non-sulphated material
- Separation of the unsulphated oil into neutral fats and fatty acids
- Table 1 : Analysis figures for sperm and neatsfoot oil by the modified Schindler and Hart separations
- Table 2 : Results of separations I and II
- Table 3 : Results for the addition of sodium oleate
- Table 4 : Fatty acid composition based on the pure oilEn ligne : https://drive.google.com/file/d/1s6XkBTWUoVCJohrTts3u2zsc9vvskf6O/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37019
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Code-barres Cote Support Localisation Section Disponibilité 007086 - Périodique Bibliothèque principale Documentaires Disponible Analysis of release of free formaldehyde originated from THP salt tannages in leather by high performance liquid chromatography : origanum onites essential oil as free formaldehyde scavenger / Eser Eke Bayramoglu in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CVIII, N° 11 (11/2013)
PermalinkAnalysis of structure and properties of hydrophobic and non-hydrophobic fatliquored leather / Mariliz Gutterres in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 97, N° 2 (03-04/2013)
PermalinkApplication of ultrasound in eco-friendly fatliquoring of leather / Mohamed Abu Sayid Mia in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIX, N° 3 (03/2024)
PermalinkAuxiliaries for the leather industry / Zschimmer & Schwarz (Max-Schwarz-Straße 3-5, Lahnstein, Germany) / Lahnstein [Germany] : Zschimmer & Schwarz (2012)
PermalinkBehavior of fatliquored leathers in a microwave field / Ying Gong in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CVII, N° 2 (02/2012)
PermalinkPermalinkBiodegradation of lecithin-based fatliquor : optimization of food to microbes ratio and residence time / Chitra Kalyanaraman in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CVIII, N° 1 (01/2013)
PermalinkCastor oil-rubberseed oil blend as a leather lubricant / A. S. Olawale in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 86, N° 2 (03-04/2002)
PermalinkChemically modified castor oil for softening of leather - A novel approach / Bindia Sahu in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVI, N° 4 (04/2021)
PermalinkCollagen D-spacing and the effect of fat liquor addition / Katie H. Sizeland in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CX, N° 3 (03/2015)
PermalinkA comparison of low temperature softness of leather lubricated with various types of fatliquor / Zhengjun Li in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 98, N° 4 (07-08/2014)
PermalinkA concept on biodegradability of fatliquors / Bindia Sahu in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIX, N° 5 (05/2024)
PermalinkPermalinkLes cuirs et peausseries tannés au végétal et la mode / E. Jaquet in TECHNICUIR, N° 6 (06-07/1977)
PermalinkCurrent trends in leather science / Anthony D. Covington in JOURNAL OF LEATHER SCIENCE AND ENGINEERING, Vol. 2 (Année 2020)
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