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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
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Code-barres Cote Support Localisation Section Disponibilité 14986 - Périodique Bibliothèque principale Documentaires Disponible Adding value [valorization] to tannery fleshings : Part II - Effect of protein hydrolysates on leather dyeing / I. Bragança in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 97, N° 3 (05-06/2013)
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Titre : Adding value [valorization] to tannery fleshings : Part II - Effect of protein hydrolysates on leather dyeing Type de document : texte imprimé Auteurs : I. Bragança, Auteur ; H. Nouws, Auteur ; A. Crispim, Auteur Année de publication : 2013 Article en page(s) : p. 111-115 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cuirs et peaux -- Déchets -- Recyclage
Cuirs et peaux -- Teinture
Déchets -- Valorisation
Echarnage
Glutaraldéhyde
Hydrolysats de protéines
RetannageIndex. 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 main objective of the present work was to study the effect of protein hydrolysates (HP) prepared from fleshings on leather dyeing. During previous studies it was found that the application of HP products, obtained from fleshings, in leather retannage intensified the colour of crust leather. In this work the CIELAB colour system was used to evaluate the effect of HP on retannage processes. The main conclusions of this study were: (i) HP can be used instead of a dicyanodiamide resin (Fortan DC) if the colour parameters of the standard procedure are to be maintained, and (ii) the replacement of an acrylic resin (Fortan A40) by glutaraldehyde-modified HP (GHP) results in a darker skin, and can therefore be interesting for the reduction of the quantity of dye used. En ligne : https://drive.google.com/file/d/1EHtGtnpl_byGnKXM02-muwHEK8ZIk1dB/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18839
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Code-barres Cote Support Localisation Section Disponibilité 15193 - Périodique Bibliothèque principale Documentaires Disponible Application of Y-shaped polyurethane and polyacrylic acid as a complex retanning agent in aldehyde-tanned goat leather / Shuangquan Lai in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXII, N° 11 (11/2017)
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Titre : Application of Y-shaped polyurethane and polyacrylic acid as a complex retanning agent in aldehyde-tanned goat leather Type de document : texte imprimé Auteurs : Shuangquan Lai, Auteur ; Yong Jin, Auteur ; Hanping Li, Auteur ; Lei Zhang, Auteur ; Xin Yin, Auteur Année de publication : 2017 Article en page(s) : p. 367-376 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Acide polyacrylique
Copolymères -- Synthèse
Copolymères séquencés
Cuirs et peaux -- Analyse
Cuirs et peaux -- Propriétés mécaniques
Cuirs et peaux -- Propriétés organoleptiques
Cuirs et peaux -- Propriétés physiques
Cuirs et peaux de chèvres
Glutaraldéhyde
Morphologie (matériaux)
Polymères amphiphiles
Polyuréthanes
Retannage
Tannage organiqueIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : A kind of Y-shaped amphiphilic block polyurethane copolymers (PUGs) with different molecular weights were successfully synthesized to be used as retanning agent combined with polyacrylic acid (PAA) for modified glutaraldehyde tanned goatskin. The structures of resulting products were characterized by FTIR, and the molecular weights of products were measured with GPC. The application performances were investigated by measuring the organoleptic and physical mechanical properties of resulting leathers according to the alone or combined use of PUG and PAA, the molecular weight of PUG, and the offer percentage of retanning agent. The best performance was found in the leather retanned by PUG750 and PAA complex retanning agent at the total offer percentage of 4 wt%. Finally, the free formaldehyde contents in the leathers retanned with 4 wt% PUG750 and PAA at different pH conditions were analyzed with acetyl acetone colorimetric method. The mechanical properties as well as the fibers morphologies of the experimental and control groups were also investigated. The results demonstrated that when the pH value at the later stage of retanning process was controlled at 4.0 or 3.0, the free formaldehyde content was significantly reduced by 20.3% or 38% respectively ; and the physical mechanical properties of leathers were also very excellent to meet the performance requirements of goatskin garment leathers. According to these results, the method for using PUG and PAA as a complex retanning agent might be a good choice in chrome-free tanning process. Note de contenu : - MATERIALS AND METHODS : Materials - Synthesis of Y-shaped amphiphilic block polyurethane copolymers (PUGs) - Synthesis of polyacrylic acid (PAA) - Fourier Transform Infrared Spectra (FTIR) - Gel permeation chromatography (GPC) - Application of polyurethanes and polyacrylic acid - Analysis of leather properties - Scanning electron microscopy analysis - Determination of free formaldehyde contents in leathers
- RESULTS AND DISCUSSION : Synthesis of polyurethane copolymers and polyacrylic acid - Effect of different retanning agents on the organoleptic and physical properties of leathers - Effect of the molecular weight of PUG on the organoleptic and physical properties of leathers - Effect of the amount of complex retanning agent on the organoleptic and physical properties of leathers - Application of the complex retanning agent under different pH conditionsEn ligne : https://drive.google.com/file/d/1n0hhgDSLoOspbiCVezGLJhDkXewQevzZ/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29395
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Code-barres Cote Support Localisation Section Disponibilité 19363 - Périodique Bibliothèque principale Documentaires Disponible Biobased films prepared from collagen solutions derived from un-tanned hides / Cheng-Kung Liu in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CX, N° 2 (02/2015)
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Titre : Biobased films prepared from collagen solutions derived from un-tanned hides Type de document : texte imprimé Auteurs : Cheng-Kung Liu, Auteur ; Nicholas P. Latona, Auteur ; Maryann M. Taylor, Auteur ; Mila Aldema-Ramos, Auteur Année de publication : 2015 Article en page(s) : p. 25-32 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Biomatériaux
Calorimétrie
Collagène
Couches minces -- Propriétés mécaniques
Cuirs et peaux
Dissolution (chimie)
Glutaraldéhyde
Microscopie
Réticulation (polymérisation)Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : The U.S. hide and leather industries are facing challenges of meeting environmental imperatives; quantifying, maintaining, and improving current hides and leather product quality; developing new processes and products; and improving utilization of waste. One of our contributions to address these ongoing challenges is to develop innovative uses and novel biobased products from hides to improve prospective markets and to secure a viable future for hides and leather industries. We had previously investigated the production of nonwoven and green composites from collagen fiber networks, which were extracted from un-tanned hides and from tannery solid wastes, such as splits or trimmings. Recently, we focused on preparing biobased films from un-tanned; specifically limed hides, which have potential commercial applications in medical care and food packaging. Collagen fiber networks were obtained from hides that have been processed to remove the noncollagenous materials through the hair removal and liming steps. We also focused on understanding the effects of processing steps such as bating and crosslinking treatments on the morphology and physical properties of biobased films from un-tanned hides. Results showed that the concentration of collagen solution and the methods of crosslinking with glutaraldehyde during the film formation process have significant effects on the properties of resultant films. Higher concentrations of collagen and addition of glutaraldehyde crosslinkers after solidification of the films yielded better mechanical properties. The encouraging results of this ongoing research are instrumental to produce biobased films, which have wide applications in both the medical field due to good biocompatibility and the food packaging because of excellent mechanical properties and acceptable edibility. Note de contenu : - EXPERIMENTAL : Materials and procedures. Hide fiber networks preparation - Collagen dissolution process - Crosslinking - Casting of collagen films - Mechanical property evaluations - Differential scanning calorimetry - Microscopic observations
- RESULTS AND DISCUSSION : Crosslinking of filmsEn ligne : https://drive.google.com/file/d/1U_HnDE22XzWLpr4LKJG4ncTY9Be9BKLa/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=23197
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Code-barres Cote Support Localisation Section Disponibilité 16945 - Périodique Bibliothèque principale Documentaires Disponible Characteristics of aldehyde reactive dyes for leather dyeing and retanning process / Xiao Chen in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CX, N° 10 (10/2015)
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Titre : Characteristics of aldehyde reactive dyes for leather dyeing and retanning process Type de document : texte imprimé Auteurs : Xiao Chen, Auteur ; Jun Liu, Auteur ; Jie Ding, Auteur ; Keyi Ding, Auteur Année de publication : 2015 Article en page(s) : p. 338-345 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Aldéhydes Un aldéhyde est un composé organique, faisant partie de la famille des composés carbonylés, dont l'un des atomes de carbone primaire (relié au plus à 1 atome de carbone) de la chaîne carbonée porte un groupement carbonyle.
L'aldéhyde le plus simple est le formaldéhyde (ou méthanal), aussi appelé formol lorsqu'il est en solution aqueuse.
Un aldéhyde dérive formellement d'un alcool primaire (oxydation) dont le groupement hydroxyde -OH est en bout de chaîne et se forme suite à l'enlèvement de deux atomes H d'où le nom "alcool déshydrogéné" ou aldéhyde.
AluminiumL'aluminium est un élément chimique, de symbole Al et de numéro atomique 13. C’est un métal pauvre, malléable, de couleur argent, qui est remarquable pour sa résistance à l’oxydation13 et sa faible densité. C'est le métal le plus abondant de l'écorce terrestre et le troisième élément le plus abondant après l'oxygène et le silicium ; il représente en moyenne 8 % de la masse des matériaux de la surface solide de notre planète. L'aluminium est trop réactif pour exister à l'état natif dans le milieu naturel : on le trouve au contraire sous forme combinée dans plus de 270 minéraux différents, son minerai principal étant la bauxite, où il est présent sous forme d’oxyde hydraté dont on extrait l’alumine. Il peut aussi être extrait de la néphéline, de la leucite, de la sillimanite, de l'andalousite et de la muscovite.
L'aluminium métallique est très oxydable, mais est immédiatement passivé par une fine couche d'alumine Al2O3 imperméable de quelques micromètres d'épaisseur qui protège la masse métallique de la corrosion. On parle de protection cinétique, par opposition à une protection thermodynamique, car l’aluminium reste en tout état de cause très sensible à l'oxydation. Cette résistance à la corrosion et sa remarquable légèreté en ont fait un matériau très utilisé industriellement.
L'aluminium est un produit industriel important, sous forme pure ou alliée, notamment dans l'aéronautique, les transports et la construction. Sa nature réactive en fait également un catalyseur et un additif dans l'industrie chimique ; il est ainsi utilisé pour accroître la puissance explosive du nitrate d'ammonium.
Colorants réactifs
Cuirs et peaux -- Lavage
Cuirs et peaux -- Teinture
Glutaraldéhyde
Retannage
Wet-white (tannage)Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Dyeing and re-tanning properties of nine aldehyde reactive dyes synthesized in our previous work were studied using aluminum pretanned wet-white sheep leather as a substrate. Their washing fastness and four dyeing property indexes, i.e., substantivity (S), exhaustion (E), reactivity (R) and fixation (F) were measured. The relationship between the colormatching effect and the relative difference values of the four dyeing property indexes of the combined dyes were investigated, and the simultaneous tanning-dyeing property of reactive dyes with a glutaraldehyde backbone were tested. The results were as follows: (1) The synthesized aldehyde reactive dyes could dye wet-white leather under mild conditions (T = 35-45°C, pH =4.0-6.5) within 1.5 h, and the dyed leather possessed a satisfactory washing-fastness. (2) Reactive dyes with a glutaraldehyde backbone had better dyeing performance than mono-aldehyde reactive dyes. (3) The less the relative difference value of the dyeing property indexes of the combined dyes, the better was the color matching effect. (4) The tested reactive dyes with a glutaraldehyde backbone increased the Ts of wet-white leather to 11-17°C in addition to dyeing it to the corresponding color. Note de contenu : - EXPERIMENTAL : Brief introduction for the preparation of aldehyde reactive dyes - The measurement of S, E, F and R (taking D, as an example) - Measuring of washing fastness - Combined dyeing experiment with two aldehyde - Simultaneous tanning-dyeing
- RESULTS AND DISCUSSION : The advantage for the dyeing process of the dyes - The washing fastness and S, E, R, F, values - Results of combined dyeing experiments - Tanning property of reactive dyes with glutaraldehyde backboneEn ligne : https://drive.google.com/file/d/1qxD9DP65TuHUvZFGI41eBda5LIXF5ffu/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24745
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Code-barres Cote Support Localisation Section Disponibilité 17500 - Périodique Bibliothèque principale Documentaires Disponible PermalinkCombination tanning system based on dialdehyde alginic acid : an ecofriendly organic approach / Gladstone Christopher Jayakumar in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CVI, N° 2 (02/2011)
PermalinkComparison of the sustainability of the vegetable, wet-white and chromium tanning processes through the life cycle analysis / Anna Bacardit in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXV, N° 3 (03/2020)
PermalinkComparison of the tanning abilities of some epoxides and aldehydic compounds / Y. Dy in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 90, N° 3 (05-06/2006)
PermalinkControlled fertilizer release via tunable poly(vinyl alcohol)/ammonium sulfate-coated nonwoven materials / Ilhan Özen in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 16, N° 1 (01/2019)
PermalinkCovalent immobilization of organophosphorus hydrolase onto insoluble bovine collagen fibers / Yanhong Li in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CIX, N° 6 (06/2014)
PermalinkLe cuir : chimie, mécanique et sensualité / Eric Degache in L'ACTUALITE CHIMIQUE, N° 293 (01/2006)
PermalinkDo leather anisotropic properties have an effect on shrinkage temperature ? / Ewa Marcinkowska in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIII, N° 5 (05/2018)
PermalinkDry heat resistance of leathers of different tannages / Selime Colak in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 105, N° 3 (05-06/2021)
PermalinkEffect of accelerated ageing on the physical and chemical properties of chrome-free leather / R. Li in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 100, N° 1 (01-02/2016)
PermalinkEffects of bating, pickling and crosslinking treatments on the characteristics of fibrous networks from un-tanned hides / Cheng-Kung Liu in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CVIII, N° 3 (03/2013)
PermalinkEffects of level and length of supplementation on leather characteristics of yearling boer and spanish wethers / R. C. Merkel in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CVIII, N° 4 (04/2013)
PermalinkFibre-forming properties of collagen and gelatin derived from bovine limed-split waste / Wei Xiangyi in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 99, N° 6 (11-12/2015)
PermalinkFive tanning-dyeing processes based on triphenodioxazine (TPDO) / Tianyu Liang in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIII, N° 3 (03/2018)
PermalinkGlutaraldehyde in the tanning industry / E. M. Filachione in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXIV (Année 1979)
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