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675 : Technologie du cuir et de la fourrure |
Ouvrages de la bibliothèque en indexation 675
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Study of fatliquoring parameters using experimental design / Mariliz Gutterres in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 93, N° 5 (09-10/2009)
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Titre : Study of fatliquoring parameters using experimental design Type de document : texte imprimé Auteurs : Mariliz Gutterres, Auteur ; Leticia Melo Dos Santos, Auteur Année de publication : 2009 Article en page(s) : p. 171-175 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : The leather market is becoming more demanding in terms of quality and competitive cost. Thereby, leather producers are searching for efficient processes in order to reduce the waste load and improve the quality of the final product. For the production of garment and upholstery leather (automotive and furniture), fatliquoring is a fundamental stage, since it provides characteristics such as softness, pleasant feel and strength. Fatliquors are offered to the leather as emulsions and they are incorporated into the structure, influencing its properties. This work presents a study of the fatliquoring process, aiming at the evaluation of the amount of oil absorbed by the leather and its physical-mechanical characteristics.
The process formulation used was appropriate for the production of furniture upholstery leather, which demands high amounts of fatliquoring products. Fatliquoring parameters of temperature, pH of neutralization, pH at fixation and fixation time were studied. Experimental design and analysis of variance (ANOVA) have been used as statistical tools for determining the parameters' effects. the process efficiency and the leather quality were measured by oil concentration and chemical oxygen demand (COD)in residual baths and oil content, softness, tensile strength, elongation and tear load of the leather. The process variables have not influenced the physical resistances. However, the temperature made a significant contribution and enhanced the oil content in the leather and softness, as well as helped to diminish the oil concentration and COD of the residual baths. The pH at fixation significantly enhanced the oil content in leather and diminished the oil concentration and COD of the residual baths. The fatliquoring effect on physical-mechanical resistance (tensile strength, elongation and tear load) has been compared to samples that were only pre-fatliquored.En ligne : https://drive.google.com/file/d/1KsPG_LM7AZFiAbDsoWQuOuOGMjFK7tdl/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=6275
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 93, N° 5 (09-10/2009) . - p. 171-175[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 011654 - Périodique Bibliothèque principale Documentaires Disponible A study of freeze branding : influence of branding conditions on legibility and leather damage / A. L. Everett in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXX (Année 1975)
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Titre : A study of freeze branding : influence of branding conditions on legibility and leather damage Type de document : texte imprimé Auteurs : A. L. Everett, Auteur ; N. W. Hooven, Auteur ; J. Naghski, Auteur ; Robert G. Koeppen, Auteur Année de publication : 1975 Article en page(s) : p. 188-205 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Animaux -- Marquage
Azote
Cuirs et peaux -- DétériorationIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Traditional hot-iron branding of cattle produces large economic losses of leather, marginal legibility for ranchers, and excessive cruelty to animals. Substitution of irons chilled in a dry ice-alcohol mixture or liquid nitrogen produces permanent, white-haired brands that are relatively painless and show greatly improved legibility. Furthermore, when properly performed, freeze branding induces minimal scarring of hide tissue and therehy reduces the leather wastage produced hy conventional branding.
To provide further guidelines for improving the technique of freeze branding, a comprehensive, three-year test was performed on 23 dairy cattle and nine beef animals at three geographic locations. The two refrigerants mentioned above were compared in parallel on opposite sides of each animal to evaluate three other primary variables : age at branding, anatomical area, and exposure time. Legibility of each brand was scored after regrowth of hair. Cuttability (usability) of resultant leathers was judged mostly in corrected grain finish, but partially in full grain and in splits after close inspection of crusted sides. It was shown that exposure time, age at branding, and breed type are all critical variables. Although both refrigerants gave equally good legibility, liquid nitrogen (as used after clipping) produced many more bald brands and too much tissue damage for acceptability in leather. Cuttability of the dry-ice hrands ranged from about 25 percent in grain leather to over 50 percent in splits.Note de contenu : - EXPERIMENTAL : Test design - Test cattle - Branding procedures - Legibility scores - Leather scores - Acceptable brands
- RESULTS AND DISCUSSION : Brand legibility - Bald brands - Leather effects - Minor factors - Optimum branding conditions
- Table 1 : Controlled variables in freeze brand test
- Table 2 : Test cattle used at each location
- Table 3 : Influence of time and refrigerant on baldness and legibility of freeze brands on 22 dairy cattleEn ligne : https://drive.google.com/file/d/1sbMCEUuTMHwhV0n-340pPke6ChSD05K0/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38786
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. LXX (Année 1975) . - p. 188-205[article]Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 008509 - Périodique Archives Documentaires Exclu du prêt A study of photocatalytic degradation of dyeing and printing wastewater by ZnO@zeolitic imidazolate framework (ZIF)-8 / Mu Hongjun in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 103, N° 5 (09-10/2019)
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Titre : A study of photocatalytic degradation of dyeing and printing wastewater by ZnO@zeolitic imidazolate framework (ZIF)-8 Type de document : texte imprimé Auteurs : Mu Hongjun, Auteur ; Ding Shaolan, Auteur ; Deng Lang, Auteur Année de publication : 2019 Article en page(s) : p. 247-252 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Bains de teinture -- Epuration
Caractérisation
Composés organiques -- Synthèse
Eaux usées -- Epuration
Nanoparticules
Oxyde de zinc
Photocatalyse
Polluants organiques -- Détérioration
Tannage -- DéchetsIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : As a semiconducting material with outstanding properties, ZnO has been playing a key rote in the chemical industry, light industry, ceramics, electronics, national defence, healthcare and other high-tech industries. In recent years, great efforts have been made in studies of ZnO as photocatalyst in the treatment of organic wastewater by virtue of its high reaction rate, excellent applicability and environmentally friendly products. The metal-organic frameworks (MOFs) exhibit large specific surface area and good stability, and calcination of zeolitic imidazolate framework (ZIF)-8 in atmosphere leads to generation of ZnO@MOF. With relatively large specific surface areas, ZnO nanoparticles can generate a large quantity of hydroxyl free radicals under visible light and these radicals can non- selectively oxidise most organics (strong organic-oxidising capability). ZIF-8 was synthesised usingt the hydrothermal method and calcinated at different temperatures to obtain ZnO nanoparticles of different sizes. Then, the photocatalytic performances of these ZnO nanoparticles were tested by degradation of methylene blue (MB) under visible light. Additionally, the ZnO samples were applied in photocatalytic degradation of dyeing and printing wastewater produced by leather retanning. The chemical oxygen demand (COD) removal rate and the total organic carbon (TOC) mineralisation rate exceeded 70% and 35%, respectively.
Tannery wastewater refers to the industrial wastewater discharged by tannery yards. It contains considerable organics and non-degradable dyes, which increase the oxygen consumption of water. Indeed, organics and non-degradable dyes are severe environmental hazards as their treatments (to meet the emission standards) are extremely challenging. Current treatment methods include physicochemical treatment, biochemical treatment and combined method. However, these methods have their respective limitations in treatment of organic pollutants. Recently, studies of semiconductors as photocatalysts for degradation of various pollutants have attracted great attention both in China and globally.
As a novel nanomaterial, metal-organic frameworks (MOF) are characterised by large specific surface area, adjustable rich porosity, high density of active sites. As a key N-type semiconductor, ZnO has been widely applied in various areas, including environmental protection, optics, electrics and catalysis. With a bandgap of 3.2eV, ZnO can only absorb UV light (with wavelength below 380 nm) in theory, while absorbance of visible light by ZnO is supposed to be extremely low. Hence, catalytic oxidising degradations of wastewater with ZnO as photocatalyst shall be under UV light, which limits their industrial applications. To enhance the photocatalytic performance of ZnO under visible light, researchers have tried several methods, including noble metal deposition, semiconductor composition, non-metallic doping, metal ion doping and carbon loading.
In this study, ZIF-8 (precursor) was synthesised using a hydrothermal method and calcined at different temperatures to obtain ZnO nanoparticles with different sizes. Characterisation by XRD, SEM, TEM and EPR revealed that calcined ZnO samples have large specific surface areas and rich porosity. The photocatalytic performances of different ZnO nanoparticles were evaluated by degradation of methylene blue (MB) under visible light to investigate the effects of morphology, crystal face, surface free radicals, pH and particle size of the ZnO and illumination time on their photocatalytic performances. Additionally, ZnO was employed as a photocatalyst in degradation of dyeing and printing wastewater produced by leather retanning under visible light, and the chemical oxygen demand (COD) removal rates and the total organic carbon (TOC) mineralisation rates were calculated.Note de contenu : - EXPERIMENTAL PROCEDURES : Agents - Synthesis of Zno@ZIF-8 and ZnO@MOF - Characterisation - Photocatalysis tests
- RESULTS AND DISCUSSION : Structure and morphology of ZnO@ZIF-8 - TG analysis of ZnO@ZIF-8 - Structure and morphology of Z400, Z500, Z600, Z700, Z800 - EDS of Z400, Z500, Z600 - EPR results of Z400, Z500, Z600 - Photocatalytic performances of ZnO (calcined at different temperatures) in photocatalytic degradation of MB - Effect of pH on photocatalytic performance of ZnO - Photocatalytic degradation of tannery dyeing wastewater by 2400-Z800En ligne : https://drive.google.com/file/d/14uqxmpHjPv973hKgazav0x6R91tW9bbk/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32999
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 103, N° 5 (09-10/2019) . - p. 247-252[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 21222 - Périodique Bibliothèque principale Documentaires Disponible A study of quantifying the emotional quality applied to a materials analysis method for genuine automotive leather / Jeong Chan Ho in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 102, N° 3 (05-06/2018)
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Titre : A study of quantifying the emotional quality applied to a materials analysis method for genuine automotive leather Type de document : texte imprimé Auteurs : Jeong Chan Ho, Auteur ; Keumhyang Lee, Auteur ; Minchul Shin, Auteur ; Wonju Kim, Auteur ; Eunchul Shin, Auteur Année de publication : 2018 Article en page(s) : p. 125-129 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse sensorielle
Consommateurs -- Préférences
Cuir dans les automobiles
Cuirs et peaux -- Analyse
Evaluation visuelle
Souplesse (mécanique)
ToucherIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : This study is concerned with the technique of quantifying and digitizing four kinds of emotions felt by customers with products, utilising the material quality control analysis methods to control leather materials for vehicles. Through the measurement of protein quantity and microscopic observation, this study conducted an authentication of natural leather and the discrimination of the grade of leather ; customers' emotions, sensory characteristics, such as touch sensibility and flexibility were defined through an analysis of the fatiiquoring agent contained in leather. As for visual characteristics, the luxury felt when we look at the leather surface composed of a dense structure was analysed in relation to the pore density of the leather surface, the phenomenon of loose grain or creases was investigated by an analysis of the pores between the fibrous layers of leather and the density. The developed comprehensive analysis technique can enable the development of the optimum material that reflecfs the customer's needs and be widely utilized in improving leather materials through investigating the causes for the problem of quality. Note de contenu : - Table 1 : Protein contents of a variety of leather by elemental analysis
- Table 2 : Leather classification by optical microscope
- Table 3 : Comparison of pore density by microscopy
- Table 4 : Analysis of shape according to wrinkling (by microscopy)
- Table 5 : ATR result of coating material
- Table 6 : Type and content of softener oil (fatliquor)
- Fig. 1 : BET result of bad and good grades
- Fig. 2 : Panel test of surface feelEn ligne : https://drive.google.com/file/d/1X68z6fDqv2XbQwtdztXP5co9mOGfH7id/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30792
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 102, N° 3 (05-06/2018) . - p. 125-129[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 20058 - Périodique Bibliothèque principale Documentaires Disponible A study of the aqueous degreasing of Australian woolly sheepskins using nonionic surfactancs. Part 1 / P. J. Waters in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 75 (Année 1991)
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Titre : A study of the aqueous degreasing of Australian woolly sheepskins using nonionic surfactancs. Part 1 : effect of surfactant type and treatment conditions Type de document : texte imprimé Auteurs : P. J. Waters, Auteur ; S. M. Price, Auteur Année de publication : 1991 Article en page(s) : p. 197-202 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : A study into the use of nonionic surfactants for the removal of natural grease from the skin of Australian woolly sheepskin in an aqueous medium has been made. The study has assessed the effects of nonionic surfactant structure, concentration, treatment time, and temperature. It was found that degreasing efficiency is highly dependent on the hydrophilic-lipophilic balance (HLB) of the surfactant, with a HLB range for optimum degreasing performance of 13.5-14.5 being identified. Blended surfactants were found to be no more effective than single component products of the same HLB. En ligne : https://drive.google.com/file/d/1iC-LkCyx3ZA7y332w4Ov9SGjVRXygfAt/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=8693
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Code-barres Cote Support Localisation Section Disponibilité 007138 - Périodique Bibliothèque principale Documentaires Disponible Study of the biodegradability of leather tanned with sodium aluminosilicate / Salvador Esquerra-Resa in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVII, N° 6 (06/2022)
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PermalinkStudy of the dissipation of the electrostatic charge of leather / Agusti Marsal in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 79, N° 4 (07-08/1995)
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PermalinkA study of the effect of decorative stitches on the tensile and lasting properties of upper leather / D. L. Venkateswara Rao in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 69 (Année 1985)
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PermalinkStudy of the effect of temperature, relative humidity and UV radiation on wet-white leather ageing / Anna Bacardit in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CV, N° 10 (10/2010)
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PermalinkA study of the extremely halophilic microorganisms found on commercially brine-cured cattle hides / David G. Bailey in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXXVIII, N° 8 (08/1993)
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PermalinkStudy of the fracture strength of waterbornd PU modified cattle leather at different thicknesses / Zhong Anhua in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 106, N° 4 (07-08/2022)
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PermalinkA study of the histological characteristics of chinese hankow goatskins / P. Jinshen in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXXIII (Année 1988)
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PermalinkStudy of the mechanical characteristics of dried leather / Soufien Azzouz in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 101, N° 5 (09-10/2017)
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PermalinkStudy of the modification of emblic extract by aminomethylation / M. Jianzhong in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 83, N° 1 (01-02/1999)
PermalinkA study of the realistic strength of leather : true stress / Bahri Basaran in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CVII, N° 10 (10/2012)
PermalinkStudy of the synthesis of sulfonated and succinated lanolin acid fatliquoring agent / Haojie Qin in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 108, N° 2 (03-04/2024)
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PermalinkStudy on an unhairing process with hydrogen peroxide and amines / Agusti Marsal in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCV, N° 1 (01/2000)
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PermalinkStudy on changes of collagen fibril structure in pigskin tissue after enzyme / Wang Yingmei in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 89, N° 2 (03-04/2005)
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PermalinkA study on characteristics of lightweight split leather using foam technology / Eun-Chul Shin in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 107, N° 2 (03-04/2023)
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PermalinkStudy on compatibility of acid dyes : assessment using a computer colour matching system / Chandra Babu Narasimhan Kannan in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 81, N° 3 (05-06/1997)
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