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JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) / Union internationale des sociétés de techniciens et chimistes des industries du cuir . Vol. 103, N° 5Mention de date : 09-10/2019Paru le : 17/10/2019 |
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Ajouter le résultat dans votre panierLife cycle assessment of leather shoe manufacturing process based on Simapro / Fan Shan in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 103, N° 5 (09-10/2019)
[article]
Titre : Life cycle assessment of leather shoe manufacturing process based on Simapro Type de document : texte imprimé Auteurs : Fan Shan, Auteur ; Ding Shaolan, Auteur ; Li Rui, Auteur Année de publication : 2019 Article en page(s) : p. 231-240 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Chaussures
Environnement -- Etudes d'impact
Produits commerciaux -- Cycle de vieIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : The Eco-indicator 99 ecological index was used to do the life cycle assessment of the manufacturing process of cotton-padded shoes [leather winter shoes with cotton or fur padding] and the 'nude' shoes [ladies court shoe styles often with a pigskin lining]. The study was based on the total life cycle assessment (LCA) and the SimaPro software. The results showed that the basic skill stages of nude/court shoes and the vamp process of the same shoes had the greatest impact on the environment. The effect was 45.66 % and 52.05 %,respectively. The weighted and single value results for nude/court leather shoes and cotton-padded/winter shoes were concentrated on the effect on human health, reaching 78.62% and 79.01%, respectively. In addition, the cotton-padded/winter shoes had the largest contribution. Note de contenu : - RESEARCH METHODS AND DATA COLLECTION : Environmental impact assessment method based on LCA - SimaPro software - Key parameters and data sources
- RESULTS AND DISCUSSION : Inventory analysis - Impact evaluation
- Table 1 : Data for nude/court shoes - Cutting process
- Table 2 : Data for nude/court shoes - Vamp process
- Table 3 : Data for nude/court shoes - Sole process
- Table 4 : Data for cotton-padded/winter shoes - Cutting process
- Table 5 : Data for cotton-padded/winter shoes - Vamp process
- Table 6 : Data for cotton-padded/winter shoes - Sole process
- Fig. 1 : The tree structure chart of the nude/court shoes
- Fig. 2 : The tree structure chart of the cotton-paded/winter shoes
- Fig. 3 : The caracteristic results of the life cycle of a pair of nude/court shoes
- Fig. 4 : The weighted results of the life of a pair of nude/court shoes
- Fig. 5 : The characteristic results of the life cycle of a pair of cotton-padded/winter shoes
- Fig. 6 : The weighted results of the life cycle of a pair of cotton-padded/winter shoes
- Fig. 7 : The weighted results of the life cycle of the shoes. NB blue / single shoes = court shoes. Yellow cotton shoes = padded winter shoes
- Fig. 8 : The single results of the two shoe styles. Single shoes = court shoe style ; cotton shoes = padded winter shoesEn ligne : https://drive.google.com/file/d/1-wf0tYhlBVApQlBN3fQdB2gekIa0PtGT/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32997
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Code-barres Cote Support Localisation Section Disponibilité 21222 - Périodique Bibliothèque principale Documentaires Disponible Preparation and properties of matting waterborne polyurethane with polybutadiene / Ma Xingyuan in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 103, N° 5 (09-10/2019)
[article]
Titre : Preparation and properties of matting waterborne polyurethane with polybutadiene Type de document : texte imprimé Auteurs : Ma Xingyuan, Auteur ; Zhang Mingrui, Auteur ; Liu Shuai, Auteur Année de publication : 2019 Article en page(s) : p. 241-246 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Agent mattant
Caractérisation
Cuir
Emulsions -- Stabilité
Essais (technologie)
Humidité -- Absorption:Eau -- Absorption
Polybutadiène
Polybutylène téréphtalate
Polymères en émulsion
Polyuréthanes
Traîtements de surfaceIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : A matting waterborne polyurethane (MWPU) emulsion was prepared using polybutadiene diol (HTPB), polybutylene adipate diol (PBA) and isophorone diisocyanate (IPDI) as the main raw materials, dimethylolpropionic acid (DMPA) as a hydrophilic chain extender and ethylene diamine as a post chain extender, this was applied to the surface treatment of the leather. The surface microstructure of the MWPU film was studied by SEM. The results showed that when the content of HTPB increased, the particle size of MWPU emulsion increased, the stability decreased, the mechanical properties and surface roughness of MWPU film increased, the elongation at break, water absorption and light transmittance decreased. Combined with the matting effect, the gloss of the MWPU film was as low as 23GU, and the surface particles of the film were more obvious. The folding fastness was free from cracking, and the abrasion resistance could reach 154 circles [rubs], which meets the testing standard of leather. Note de contenu : - EXPERIMENTAL PROCEDURE : Experimental materials and instruments - Preparation of MWPU emulsion - Preparation of MWPU film - Effect of HTPB content on MWPU performance - Preparation of matting waterborne surface treatment agent - Characterisation and test methods
- RESULTS AND DISCUSSIONS : Effect of HTPB content on the appearance and stability of MWPU emulsion - Effect of HTPB content on water absorption rate of MWPU film - Effect of HTPB content on particle size of MWPU emulsion - Effect of HTPB content on light transmittance of MWPU film - SEM analysis - Surface treatment test results of MWPU film on leatherEn ligne : https://drive.google.com/file/d/1a7ysIBvAylOjF7xzoza9B0FDXMN8dg4j/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32998
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Code-barres Cote Support Localisation Section Disponibilité 21222 - Périodique Bibliothèque principale Documentaires Disponible 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)
[article]
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
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Code-barres Cote Support Localisation Section Disponibilité 21222 - Périodique Bibliothèque principale Documentaires Disponible Inhibitory mechanism of hexavalent chromium formation in chrome-tanned leather with combined inhibitors / Koki Ogata in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 103, N° 5 (09-10/2019)
[article]
Titre : Inhibitory mechanism of hexavalent chromium formation in chrome-tanned leather with combined inhibitors Type de document : texte imprimé Auteurs : Koki Ogata, Auteur ; Shunji Hattori, Auteur ; Koji Takahashi, Auteur Année de publication : 2019 Article en page(s) : p. 253-259 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Chimie analytique
Chrome hexavalent
Inhibiteurs (chimie)
Statistique
Tannage au chromeIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : The perfect inhibition of Cr6+ formation in Cr-tanned leather has been reported using combined inhibitors consisting 3(2)-t-butyl-4-hydroxyanisole (BHA), ascorbic acid (AsA), and collagen peptide (CP-9). In this study, the inhibitory mechanism of the combined inhibitors was investigated with respect to: (i) Inhibiting the conversion of Cr3' to Cr6+ by scavenging lipid radicals and peroxy radicals in free lipid of Cr-tanned leather; (ii) strengthening the reductivity within Cr-tanned leather; and (iii) stabilising Cr3+ complexes by coordination with CP-9. Electron spin resonance (ESR) of free lipid extracted from the Cr-tanned leather treated with combined inhibitors showed that free radicals considerably reduced with BHA and AsA. AsA markedly depressed peroxide value (POV), indicating strong effectiveness of the reducing action of AsA. The CP-9-added extract with 0.1 mol/L potassium phosphate buffer (pH 5.5) of the Cr-tanned leather before changing from pH5.5 to 8.0 showed that the conversion of Cr3+ to Cr6+ showed concentration-dependent inhibition, suggesting stabilisation through CP-9 coordination. Therefore, perfect inhibition of Cr6+ formation in Cr-tanned leather using combined inhibitors was concluded to be caused by the multiple inhibitory actions of BHA, AsA, and CP-9, such as radical scavenging, radical scavenger regeneration, reducing action, and Cr3+ stabilisation. Note de contenu : - MATERIALS AND METHODS : Materials - Preparation of free and bound lipids in Cr leather - ESR - Peroxide value (POV) measurements - Carbonyl value (COV) measurement - Estimation of stabilisation of Cr3+ complex with CP-9 - Analytical methods - Statistical analysis
- RESULTS : Radical scavenging action of inhibitors - Stabilisation of free Cr3+ complexEn ligne : https://drive.google.com/file/d/1LhJTnvaHNvu7PeQaURJOAhIvfRmLXZAv/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33000
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Code-barres Cote Support Localisation Section Disponibilité 21222 - Périodique Bibliothèque principale Documentaires Disponible Formaldehyde release from chekiang lambskin, characteristic parameter determination and influencing factors / Hao Dong-Yan in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 103, N° 5 (09-10/2019)
[article]
Titre : Formaldehyde release from chekiang lambskin, characteristic parameter determination and influencing factors Type de document : texte imprimé Auteurs : Hao Dong-Yan, Auteur ; Wang Xue-Chuan, Auteur ; Lu Wei-Na, Auteur ; Li Ji, Auteur Année de publication : 2019 Article en page(s) : p. 260-267 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Coefficient de diffusion Un coefficient de diffusion est une grandeur caractéristique du phénomène de diffusion de la matière. Le coefficient de diffusion mesure le rapport entre le flux molaire dû à la diffusion moléculaire, et le gradient de concentration de l'espèce chimique considérée (ou, plus généralement, de la variable d'effort entraînant cette diffusion), comme formulé par la loi de Fick.
Cuirs et peaux de moutons
Distillation
EmissivitéEn transfert radiatif, l'émissivité correspond au flux radiatif du rayonnement thermique émis par un élément de surface à température donnée, rapporté à la valeur de référence qu’est le flux émis par un corps noir à cette même température. Cette dernière valeur étant la valeur maximale possible, l'émissivité est un nombre inférieur ou égal à l'unité. (widipedia)
Extraction (chimie)
Fourrures -- Teneur en formaldehydeIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : VOC emissions may cause poor indoor (vehicle cabins included) air quality (IAQ). Recent studies have been conducted on the characteristics of volatile organic compounds (VOCs) emissions, most of them are focused on wood-based building materials, fur or fur imitations are scarcely mentioned. However, formaldehyde or formaldehyde-containing chemicals are often used in the production of fur, resulting in a certain amount of formaldehyde remaining in the finished product. This paper takes formaldehyde (FA) as an example to study its diffusion in fur. In order to understand and control the behaviour of the formaldehyde emission characteristics. Based on detailed mass transfer analysis of the emission process in a ventilated chamber, this paper measured the three emission characteristic parameters, i.e., the initial emittable concentration (C0), the diffusion coefficient (Dm) and the partition coefficient (K). The influence of different factors on the release parameters was also studied, as well as the time required for the emission of formaldehyde under different ventilation rates ; we also compared the formaldehyde results of different test methods. The results showed that both Dm and C, increased as temperature rose, but Co increase is significant. With the increase of relative humidity, Dm decreased but Co increased. In addition, the prediction model agrees well with the experimental data. The greater the ventilation rate, the faster the improvement of air quality standards in the cabin; The initial concentration was less than 43% of the formaldehyde content obtained through the extraction method and less than 4.6% of the formaldehyde content obtained by the distillation method. Note de contenu : - EXPERIMENTAL PROCEDURE : Materials - Equipment and instruments - Formaldehyde emission test of fur - Extraction method - Distillation method - Mass release model
- RESULTS AND DISCUSSION : Effects of different temperatures on the release parameters - The effect of different relative humidity levels on characteristic parameters - Comparison of diffusion coefficient Dm between fur and other materials in the literature - Comparison of release time of formaldehyde in the environmental cabin under different ventilation conditions - Comparison of the initial concentration of fur formaldehyde with the concentration measured by distillation and extraction method - Sensitivity analysisEn ligne : https://drive.google.com/file/d/1yku0zJdX5XxuEJ6e7E33dfsg429hja_r/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33001
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Code-barres Cote Support Localisation Section Disponibilité 21222 - Périodique Bibliothèque principale Documentaires Disponible Tanning properties of 4-((4,6-dichloro-1,3,5-triazin-2-yl) amino) benzene sulfonic acid / Zou Xianglong in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 103, N° 5 (09-10/2019)
[article]
Titre : Tanning properties of 4-((4,6-dichloro-1,3,5-triazin-2-yl) amino) benzene sulfonic acid Type de document : texte imprimé Auteurs : Zou Xianglong, Auteur ; Fang Qi, Auteur ; Chai Yuye, Auteur ; Li Zhongyu, Auteur ; Ren Bianli, Auteur Année de publication : 2019 Article en page(s) : p. 268-271 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Agents de tannage
Caractérisation
Composés organiques -- Synthèse
Cuir -- Stabilité
Tannage organiqueIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : In this work, a triazine tanning agent of 4-((4,6-dichloro-1,3,5-triazin-2-yl)amino) benzenesulfonic acid (SAT) was prepared with cyanuric chloride and sodium p-aminobenzene sulfonate, its structure was confirmed by FTIR spectroscopy, and its tanning property was investigated. The results indicate that SAT can raise the Ts of tanned skin to around 75°C at the optimised dosage of 3%. The stability of tanned leather was tested by washing with aqueous solution of 10w% urea, lOw% NaCI and 14 acetone. The results of washing show that the tanned leather of SAT has excellent stability and there are stable covalent bond interactions between SAT and collagen fibres. Based on the results of washing and the structure characteristics of SAT, a tanning mechanism of SAT was given in which the second Cl and the third CI on the triazine ring can both react with collagen fibres under mild tanning conditions of 35°C to 45°C. Note de contenu : - MATERIALS AND METHODS : Materials - Synthesis of SAT - Instrumentation - Tanning procedure - Test of stability of tanned leather
- RESULTS AND DISCUSSION : Structure characterisation of SAT - Effect of tanning temperature on Ts - Tanning stability of SATEn ligne : https://drive.google.com/file/d/1lkLeE9lnQ3jOM8SfxH_y2V9d5wZryfo9/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33002
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Code-barres Cote Support Localisation Section Disponibilité 21222 - Périodique Bibliothèque principale Documentaires Disponible Preparation of formaldehyde-free melamine resins using furfural as condensing agent and investigation of their retanning performance / Muhammad Naveed Ashraf in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 103, N° 5 (09-10/2019)
[article]
Titre : Preparation of formaldehyde-free melamine resins using furfural as condensing agent and investigation of their retanning performance Type de document : texte imprimé Auteurs : Muhammad Naveed Ashraf, Auteur ; Shahzad Maqsood Khan, Auteur ; Shahid Munir, Auteur ; Rashid Saleem, Auteur Année de publication : 2019 Article en page(s) : p. 272-278 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cuir -- Teneur en formaldéhyde
Cuirs et peaux -- Analyse
Cuirs et peaux -- Propriétés organoleptiques
Furfural
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.
Polymères -- Synthèse
Produits de condensation (chimie)
RetannageIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Sulfonated amino resins are an important class of polymers which are used as retanning agents in the leather industry. There is challenge for such resins to be synthesised without formaldehyde to satisfy the strict regulation in leather goods. In this work, formaldehyde-free melamine based retanning agents have been synthesised by acid catalysed process using furfural as condensing agent and sodium metabisulfite as the sulfonating agent. Sulfonated melamine furfural (SMFr) resins were synthesised using different molar ratio of melamine, sodium metabisulfite and furfural. Stable and water-soluble resins were produced without etherification.
The sodium metabisulfite to melamine ratio (SMB/M) was changed from 0.5-2.0 and furfural to melamine mole ratio (Fr/M) was varied from 2-6. The viscosity behaviour of the produced resins wâs evaluated with the increasing trend of sulfonation and increasing mole ratio of furfural to melamine. Functional group analysis and conversion of reactants into product was elucidated by FTIR.
Synthesised formaldehyde-free resins (SMFr) were comparatively evaluated as retanning agents on goatskin wet-blue against a commercially available sulfonated melamine formaldehyde (SMF) resin. The retanning performance of synthesised resins was studied and found better than that of the commercial SMF resin.Note de contenu : - EXPERIMENTAL PROCEDURE : Materials and equipment - Preparation of SMFr resin
- RESULTS AND DISCUSSION : Synthesis of SMFr resin - Viscosity trend of resins - Resin application on leather as retanning agent - Quantitative determination of free formaldehyde content in leather - Organoleptic properties of retanned leather - SEM examination (JEOL 6490) - Structure elucidation/FTIR spectroscopy analysis of SMFr resinEn ligne : https://drive.google.com/file/d/1tehL2heU-liowrx614fHL9jzpSdLCcXB/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33003
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