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675 : Technologie du cuir et de la fourrure |
Ouvrages de la bibliothèque en indexation 675
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Comparative retanning performance of ecofriendly melamine resins produced using different condensing agents / Muhammad Naveed Ashraf in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 105, N° 3 (05-06/2021)
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Titre : Comparative retanning performance of ecofriendly melamine resins produced using different condensing agents Type de document : texte imprimé Auteurs : Muhammad Naveed Ashraf, Auteur ; Shahzad Maqsood Khan, Auteur ; Shahid Munir, Auteur ; Rashid Saleem, Auteur Année de publication : 2021 Article en page(s) : p. 140-152 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cuirs et peaux -- Propriétés mécaniques
Cuirs et peaux -- Propriétés organoleptiques
Mélamine sulfonée
MélamineLa mélamine, de nom chimique 1,3,5-triazine-2,4,6-triamine, est parfois dénommée cyanuramide ou cyanurotriamine. Sa formule brute est C3H6N6.
Les "résines mélamine-formaldéhyde" ou "mélamine-formol" (sigle MF) sont appelées "mélamine" dans le langage courant. Elles font partie de la famille des aminoplastes qui regroupe des résines thermodurcissables aminées, issues d'un comonomère tel l'urée ou la mélamine, parfois le thiocarbamide, le cyanamide hydrogène ou le dicyandiamide ; le second comonomère étant le formaldéhyde.
Produits de condensation (chimie)
Retannage
Tannage synthétiqueIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Formaldehyde has been a famous raw material for production of amino resins used in leather processing however; the proven carcinogenic hazards of formaldehyde contravene regulations are restricting the sale of leather goods with regard to human contact. In this study sulfonated melamine based resins were produced by using condensing agents other than formaldehyde, for example furfural, glyoxal, methylglyoxal and glutaraldehyde. Synthesised formaldehyde-free melamine resins were studied for determination of their molecular weights, thermal stability by TGA and spectroscopic studies using FTIR. Synthesised resins were used in leather retanning for investigation of their mechanical and organoleptic properties in comparison with leather samples based on a commercial resin. The effects of melamine resins on the fibrous structure of collagen were examined by SEM. Leather pieces were analysed for estimation of free formaldehyde contents and the pollution load of the retanning wastes was also investigated. The prepared resins conferred improved mechanical and organoleptic characteristics to the resulting leather compared to the control but the results produced by MGLSNA and MGSNA resins were more prominent. Leather produced from each resin sample was formaldehyde free.
SEM images of the leather revealed the presence of fine grains with improved fibrous collagen structure especially for MGLSNA and MGSNA. Pollution load reduction efficiency of newly developed resins was improved in comparison with control indicating their better uptake and fixation in collagen fibres. Overall, all four novel resins produced formaldehyde-free leather with improved retanning and thermal properties but the results produced by MGLSNA and MGSNA resins were better due to introduction of more reactive sites and aromatic sulfonation agents.Note de contenu : - EXPERIMENTAL PROCEDURE : Chemicals and apparatus - Synthesis of sulfonated melamine resins
- RESULTS AND DISCUSSION : Synthesis of sulfonated melamine resins - Physical characteristics of sulfonated melamine resins - Molecular weight determination of sulfonated melamine resins - Comparative application of sulfonated melamine resins on leather - Mechanical properties of leather retanned with sulfonated melamine resins - Organoleptic properties of leather retanned with sulfonated melamine resins - Characterisation of retanned leather by SEM - Determination of free formaldehyde content in leather - Thermo gravimetric analysis of sulfonated melamine resins - FTIR analysis - Wastewater analysis of retanning bath
- Table 1 : Mole ratio and physical characteristics of sulfonated melamine resin prepared with different condensing agents
- Table 2 : Dependence of the flow time, relative viscosity, specific viscosity, δ = ηsp - inηr and δ/c2 at different concentrations of SMFr resin
- Table 3 : Dependence of the concentration of novel resins of study on δ/c2
- Table 4 : Leather processing recipe, materials and conditions
- Table 5 : Mechanical properties of leather retanned with sulfonated melamine resins
- Table 6 : Comparative pollution load efficiency of sulfonated melamine resinsEn ligne : https://drive.google.com/file/d/1N5Wt_oi9uVzToJ_7z1L_jwRfqTgOlm5M/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35834
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 105, N° 3 (05-06/2021) . - p. 140-152[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 22745 - Périodique Bibliothèque principale Documentaires Disponible Comparative study of analytical methods for hexavalent chromium / Carlos L. Nazario in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXXV (Année 1990)
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Titre : Comparative study of analytical methods for hexavalent chromium Type de document : texte imprimé Auteurs : Carlos L. Nazario, Auteur ; Edward E. Menden, Auteur Année de publication : 1990 Article en page(s) : p. 212-224 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Determination of hexavalent chromium is essential for disposal of chromium containing waste into the environment,but current methods produce ambiguity in reported results. Using five concentration levels of Cr(III) and spiking with three concentrations of Cr(VI),determinations of Cr(VI) were made using EPA** solid waste methods 7195(Coprecipitation), 7196(Colorimetric-Diphenylcarbazide), and 7197(Chelation-Extraction).
The data indicate limitations in quantifying Cr(VI) in Cr(III) matrices. The Coprecipitation method was shown to be inadequate in determining the presence of Cr(VI) in Cr(III) matrices. Chelation-Extraction was able to show that one Cr(III) solution was free of any Cr(VI)contamination. For the other Cr(III)solution, the method indicated a presence of Cr(VI) but was unable to quantify the amount. Colorimetric analysis proved to be the most reliable, consistent, and informative of all three methods. It confirmed the findings of the Chelation-Extraction method and,in addition, quantified the amount of Cr(VI) present in the Cr(III) solution.En ligne : https://drive.google.com/file/d/15rr1LaP7LDuImz9aft51fLzTfctEPZns/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=8661
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. LXXXV (Année 1990) . - p. 212-224[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 008090 - Périodique Bibliothèque principale Documentaires Disponible Comparative study of moisture permeability of three natural leathers / Zhong Anhua in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 104, N° 6 (11-12/2020)
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Titre : Comparative study of moisture permeability of three natural leathers Type de document : texte imprimé Auteurs : Zhong Anhua, Auteur ; Wang Jie, Auteur ; Ling Yali, Auteur Année de publication : 2020 Article en page(s) : p. 271-274 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cuirs et peaux -- Analyse
Cuirs et peaux de bovins
Cuirs et peaux de moutons
Cuirs et peaux de porcs
Humidité
Perméabilité
TempératureIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Pigskin, cowhide and sheepskin are commonly used clothing materials in our life. The study of moisture permeability is very important. In this paper, the effects of temperature and humidity on the moisture permeability of three kinds of leather were studied. The results showed that the moisture permeability of the three kinds of leather increased with the increase of temperature, and the rising trends of pigskin and sheepskin were similar. When the temperature was greater than 20°C, their order of moisture permeability was cowhide > pigskin > sheepskin. With the increase of humidity, the moisture permeabilities of the three kinds of leather were close to each other, the changing trend of moisture permeability of pigskin and sheepskin was very similar. The moisture permeability of sheepskin is greatest at high humidity. By comparing the 3d surface and the mathematical model, it was found that humidity has a greater influence on its moisture permeability than temperature. Note de contenu : Pigskin, cowhide and sheepskin are commonly used clothing materials in our life. The study of moisture permeability is very important. In this paper, the effects of temperature and humidity on the moisture permeability of three kinds of leather were studied. The results showed that the moisture permeability of the three kinds of leather increased with the increase of temperature, and the rising trends of pigskin and sheepskin were similar. When the temperature was greater than 20°C, their order of moisture permeability was cowhide > pigskin > sheepskin. With the increase of humidity, the moisture permeabilities of the three kinds of leather were close to each other, the changing trend of moisture permeability of pigskin and sheepskin was very similar. The moisture permeability of sheepskin is greatest at high humidity. By comparing the 3d surface and the mathematical model, it was found that humidity has a greater influence on its moisture permeability than temperature. En ligne : https://drive.google.com/file/d/1qqfYYxLyy-dux_NUF9qJTPa22QcR-v42/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34903
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 104, N° 6 (11-12/2020) . - p. 271-274[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 22440 - Périodique Bibliothèque principale Documentaires Disponible A comparative study of uniaxial and biaxial breaking stress and strain profiles of goat upper / M. D. Naresh in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 85, N° 2 (03-04/2001)
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Titre : A comparative study of uniaxial and biaxial breaking stress and strain profiles of goat upper Type de document : texte imprimé Auteurs : M. D. Naresh, Auteur ; T. Rangaswamy, Auteur ; V. Arumugam, Auteur ; R. Sanjeevi, Auteur Année de publication : 2001 Article en page(s) : p. 72-79 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Contraintes (mécanique)
Cuirs et peaux de chèvres
Essais de résilience
Essais dynamiques
Rupture (mécanique)
Tige de la chaussure
Traction (mécanique)Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Conventional uniaxial tensile test methods may only inadequately provide realistic information about the mechanical behaviour of leather under actual user conditions. A preliminary study to map the breaking stress and breaking strain profiles of goat upper using a biaxial testing procedure is described here. The results indicate that whilst the influence of the fibre matrix is retained, uniaxial tests generally tend to give higher results, a factor which needs careful consideration during design and development of end products. Note de contenu : - Experimental design
- Uniaxial strength profile
- Biaxial strength profile
- Comparison with uniaxial test results
- Influence of lateral load on dynamic axis prior to extensionEn ligne : https://drive.google.com/file/d/1mbYkNfI4ZQZd53ToQSmFu0KlkwnZ5veO/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40414
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 85, N° 2 (03-04/2001) . - p. 72-79[article]A comparative study of various collagen fibre waste as oil sorbent materials / Weining Du in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 99, N° 6 (11-12/2015)
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Titre : A comparative study of various collagen fibre waste as oil sorbent materials Type de document : texte imprimé Auteurs : Weining Du, Auteur ; Han Xiaona, Auteur ; Li Zhengjun, Auteur ; Sun Guolong, Auteur ; Li Lixin, Auteur Année de publication : 2015 Article en page(s) : p. 267-272 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Absorbants et adsorbants
Collagène
Cuirs et peaux -- Déchets -- Recyclage
Epoxydes
Huile de colza
Huiles et graisses
Hydrophobie
Nettoyage
Oligomères
PolydiméthylsiloxaneLe polydiméthylsiloxane —[O-Si(CH3)2]n—, ou poly(diméthylsiloxane) selon la nomenclature systématique, communément appelé PDMS ou diméthicone, est un polymère organominéral de la famille des siloxanes souvent présent dans les shampoings. On l'y ajoute pour augmenter le volume des cheveux mais il peut également aller boucher les pores du cuir chevelu et rendre les cheveux gras. C'est une des raisons pour lesquelles se laver les cheveux tous les jours est très déconseillé avec un shampooing contenant des silicones.
Il existe également de l'amodiméthicone, qui est un dérivé du diméthicone.
Le polydiméthylsiloxane est un additif alimentaire (E900), utilisé comme antimoussant dans les boissons (Coca-Cola BlāK).
La chaîne de poly(diméthylsiloxane) forme également la structure de base des huiles et des caoutchoucs silicones.
Poudre de peaux
SiliconesLes silicones, ou polysiloxanes, sont des composés inorganiques formés d'une chaine silicium-oxygène (...-Si-O-Si-O-Si-O-...) sur laquelle des groupes se fixent, sur les atomes de silicium. Certains groupes organiques peuvent être utilisés pour relier entre elles plusieurs de ces chaines (...-Si-O-...). Le type le plus courant est le poly(diméthylsiloxane) linéaire ou PDMS. Le second groupe en importance de matériaux en silicone est celui des résines de silicone, formées par des oligosiloxanes ramifiés ou en forme de cage (wiki).Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : To compare the potentiel utilization of various collagen fibre wastes from the leather industry, such as raw hide waste, oil-tanned and chrome-tanned wastes, as oil sorbents, a hydrophobic polydimethylsiloxane (PDMS) modified collagen fibre was prepared using raw hide waste and an epoxy-terminated silicone oligomer. We fabricated samples 13y a lyophilization technique utilizing the corresponding hide powder fibre (HPF). The oil sorption capacity, sorption saturation time, and retention capacity of prepared sorbents were studied. The results showed that oil sorption capacity of PDMS-modified HPF for silicone oil and vegetable (rape) oil were 6.98 and 5.58g/g, respectively. This sample exhibited the highest oil sorption capacity. The resuits suggest that with appropriate pore size, high porosity and low apparent surface energy, collagen fibre based sorbent would demonstrate favourable oil sorption characteristics and is very promising for ail cleanup application. Note de contenu : - EXPERIMENTAL PROCEDURES : Materials - Preparation of hide powder fibres (HPFs) and PDMS-modified HPF - Preparation of pie-shaped HPF sorbents - Oil sorption capacity - Oil sorption saturation time - Oil retention capacity - Characterizations
- RESULTS AND DISCUSSION : Oil sorption capacity in pure oil medium - Oil sorption saturation time - Oil retention capacityEn ligne : https://drive.google.com/file/d/1gdQCSjGxM_TPnqo-uzetB6n3UyHHkflr/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=25097
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 99, N° 6 (11-12/2015) . - p. 267-272[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 17683 - Périodique Bibliothèque principale Documentaires Disponible A comparison of chemical, physical and enzymatic crosslinking of bovine type I collagen fibrils / Andrew Lastowka in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. C, N° 5 (05/2005)
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PermalinkComparison of chromium leachability from tannery waste usin EP toxicity and toxicity characteristic leaching procedure methods / Edward E. Menden in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXXIII (Année 1988)
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PermalinkComparison of dry cleaning test methods / A. W. Landmann in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 63, N° 6 (11-12/1979)
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PermalinkComparison of finishing application for aliphatic polyurethane dispersions and polyurethane/polyacrylate composite emulsions / Shuling Chai in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CV, N° 2 (02/2010)
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PermalinkComparison of IUP 16 ad microscopic hot table methods for shrinkage temperature determination / Joaquim Font in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 94, N° 2 (03-04/2010)
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PermalinkComparison of leather produced from fresh and salted hides / Betty M. Haines in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 59 (Année 1975)
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PermalinkComparison of leather produced from fresh and salted hides / Betty M. Haines in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 59, N° 6 (11-12/1975)
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PermalinkPermalinkComparison of the inhibition efficiency of natural and synthetic phenolic antioxidants on Cr(VI) formation / Alper Kilikli in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXII, N° 3 (03/2017)
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PermalinkComparison of the properties of black dyestuffs / J. Berenguer in WORLD LEATHER, Vol. 15, N° 2 (04/2002)
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PermalinkComparison of the properties of black dyestuffs new developments / J. Berenguer in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCVI, N° 3 (03/2001)
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PermalinkComparison of the technical performance of leather versus alternative materials in INTERNATIONAL LEATHER MAKER (ILM), N° 47 (05-06/2021)
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PermalinkA comparison of two tear tests for leather / R. Guy in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 59 (Année 1975)
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PermalinkComparison of weathering variables on chrome-tanned and wet-white leather ageing / Lluis Ollé in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 96, N° 1 (01-02/2012)
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PermalinkCompeting ligands in chromium complexes : a computational study / Tereza Varnali in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCVII, N° 5 (05/2002)
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