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Country-level life cycle assessment of carbon footprint in processing of bovine upper leather / Mianhong Chen in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIV, N° 6 (06/2019)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXIV, N° 6 (06/2019) . - p. 194-203 Titre : Country-level life cycle assessment of carbon footprint in processing of bovine upper leather Type de document : texte imprimé Auteurs : Mianhong Chen, Auteur ; Youdan Duan, Auteur ; Liming Dong, Auteur ; Min Chen, Auteur ; Cheng Haiming, Auteur Année de publication : 2019 Article en page(s) : p. 194-203 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Bilan des émissions de gaz à effets de serre Cuirs et peaux -- Industrie -- Aspect de l'environnement Cuirs et peaux de bovins Dioxyde de carbone Durée de vie (Ingénierie) Environnement -- Etudes d'impact Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Leather-making processes have achieved great improvements in reducing environmental pollution all over the world. In this study, we collected the data from the tanneries in five countries on the material flow to quantify and analyze the carbon footprint of leather-making process, based on the Life Cycle Assessment with two impact assessment methods that characterize the impact of climate change (IPCC 2013 GWP 100 years and GHG Protocol). To process 1000 kg of raw hides, tanneries in Chile, China, India, Italy, and Spain emitted 882, 1180, 1608, 1198, and 755 kg of carbon dioxide equivalent (CO2Eq), respectively. The carbon footprint of 1 kg of finished leather for shoe upper in five countries ranges from 3.41 to 6.30 kg CO2Eq. The average power consumption was the largest factor causing carbon emissions, followed by the consumption of acrylic resin, and chromium tanning agent. Carbon footprint analysis suggested that enzyme-assisted beamhouse and recycling of the liming float and the tanning float can effectively reduce carbon emissions during the leather-making process. This study will lay the foundation for the carbon footprint research of the downstream products of leather (shoes, apparel industry, etc.). Note de contenu : - METHOD AND CONCEPTS : Goal - Functional unit - System boundaries - Data collection - Impact assessment - RESULTS AND DISCUSSION : Evaluation of CF of upper leather with IPCC 2013 GWP 100 years - Evaluation of carbon footprint of 1 kg upper leather with GHG protocol En ligne : https://drive.google.com/file/d/1bWQaZOBmi8AeEq6H5mAZFx2BOY7dBcGY/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32652 [article]

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Synthesis and leather application properties of a carboxylated graphene oxide modified waterborne polyacrylate leather finishing agent / Shuangquan Lai in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIV, N° 6 (06/2019)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXIV, N° 6 (06/2019) . - p. 204-215 Titre : Synthesis and leather application properties of a carboxylated graphene oxide modified waterborne polyacrylate leather finishing agent Type de document : texte imprimé Auteurs : Shuangquan Lai, Auteur ; Yong Jin, Auteur ; Liangjie Shi, Auteur ; Weining Du, Auteur Année de publication : 2019 Article en page(s) : p. 204-215 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Caractérisation Carboxylation Composés inorganiques -- Synthèse Cuirs et peaux -- Finition Cuirs et peaux -- Propriétés mécaniques Mesure Oxyde de graphène Polymères en émulsion Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Carboxylated graphene oxide (GO-COOH), prepared by the reaction of bromoacetic acid with the hydroxyl and epoxy groups on the graphene oxide (GO) layers, was blended into a poly(ethyl acrylate) (PEA) emulsion and a PEA emulsion based polyacrylate leather finishing agent respectively, to prepare PEA/GO-COOH composite emulsions and GO-COOH modified waterborne polyacrylate leather finishing agents. The consequence of the amount of GO-COOH on the properties of the PEA film and related leather coatings were systematically investigated. The results indicate that stable GO-COOH dispersed composite emulsions were generated leading to homogeneously dispersed composite films. With an increase in the GO-COOH amount from 0 wt% to 0.5 wt%, the tensile strength increased by 106.2%. Additionally, TGA results demonstrated an improvement of the thermal stability of PEA film after modified with GO-COOH. Most importantly, the folding resistance and rubbing fastness properties of leather finished with GO-COOH modified polyacrylate leather finishing agents were improved proportionate to the GO-COOH amount. Therefore, the GO-COOH modified waterborne polyacrylate leather finishing agent possesses improved performances and likely offers beneficial leather finishing application properties. Note de contenu : - MATERIALS AND METHODS : Materials - Preparation of oly(ethyl acrylate) (PEA) emulsion - Synthesis of graphene (GO) - Synthesis of carboxylated graphene oxide (GO-COOH) - Preparation of PEA/GO-COOH composite emulsions and films - Application of PEA emulsions and GO-COOH in leather finishing agent - Characterization and performance measurements characterization of GO and GO-COOH - Characterization of PEA/GO-COOH composite emulsions - Characterization of PEA/GO-COOH composite films physical mechanical properties - Measurement of applied properties - RESULTS AND DISCUSSION : Characterization of GO and COOH - Dispersion stability of the PEA/GO-COOH composite emulsions - Properties of the PEA/GO-COOH composite films - Determination of applied properties En ligne : https://drive.google.com/file/d/1pZIl1PacEBReSfkDlqVAWHbSCsNqtalW/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32653 [article]

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Graphene oxide grafted maleic anhydride vinyl acetate co-polymer and its enhancement of flame retardant and UV-resistance of retanned leather / Yazhou He in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIV, N° 6 (06/2019)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXIV, N° 6 (06/2019) . - p. 216-227 Titre : Graphene oxide grafted maleic anhydride vinyl acetate co-polymer and its enhancement of flame retardant and UV-resistance of retanned leather Type de document : texte imprimé Auteurs : Yazhou He, Auteur ; Zhenyu Zhang, Auteur ; Haojun Fan, Auteur ; Yi Chen, Auteur ; Jun Yan, Auteur Année de publication : 2019 Article en page(s) : p. 216-227 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Agents de tannage Caractérisation Copolymère acétate de vinyle anhydride maléique Copolymères greffés Cuirs et peaux -- Propriétés mécaniques Ignifugeants Composé chimique utilisé pour réduire l'inflammabilité. Il peut être incorporé au produit durant sa fabrication ou appliqué ultérieurement à sa surface. Oxyde de graphène Polyaddition Résistance à la flamme Résistance au rayonnement ultraviolet Retannage Stabilité thermique Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Maleic anhydride grafted graphene oxide (GOMA) monomer was prepared by modifying the graphene oxide (GO) with hexachlorocyclotriphosphazene (HCCP), ethylenediamine (ETA) and maleic anhydride (MA). Then a polymeric retanning agent, abbreviated as poly(GOMA-MA-VA) was synthesized from GOMA, MA and vinyl acetate (VA) by free radical polymerization. The structures of GOMA and poly(GOMA-MA-VA) were characterized by Fourier transform infrared (FTIR) spectroscopy, Raman and X-ray photoelectron spectroscopy (XPS), simultaneously, the flammability, UV-resistance as well as the thermal stability and mechanical properties of re-tanned leathers were also investigated. Results show that GO grafted by polymer presents well dispersing stability and can penetrate into collagen fibers to form strong combination with fibers. Furthermore, this novel multifunctional retanning agent can efficiently improve the flame retardance, ultraviolet (UV) resistance, thermal stability and mechanical properties of resultant leather. Note de contenu : - EXPERIMENTAL : Materials - Preparation of maleic anhydride grafted graphene oxide (GOMA) monomer - Preparation of poly(GOMA-MA-VA) retanning agent - Retanning process - Characterization and performance testing - RESULTS AND DISCUSSION : Characterization of GOMA - Characterization of retanning agents - Absorption of wet blue to retanning agents - Flammability of leather - UV-resistance of retanned leather En ligne : https://drive.google.com/file/d/1utJYBmNgttd_zB41-7kCfbQQ4tn9Ifeg/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32654 [article]

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Investigation of the synthesis of a novel glycidyl ether-amine epoxy tanning agents and their tanning performance / Xiaoyan Pang in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIV, N° 6 (06/2019)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXIV, N° 6 (06/2019) . - p. 228-239 Titre : Investigation of the synthesis of a novel glycidyl ether-amine epoxy tanning agents and their tanning performance Type de document : texte imprimé Auteurs : Xiaoyan Pang, Auteur ; Zhiwen Ding, Auteur ; Wei Ding, Auteur ; Xiao Xiao, Auteur ; Xuepin Liao, Auteur ; Bi Shi, Auteur Année de publication : 2019 Article en page(s) : p. 228-239 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Agents de tannage Caractérisation Composés organiques -- Synthèse Epoxydes Evaluation Poids moléculaires Rhéologie Structure chimique Tannage Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Isophorone diamine (IPDA) and epichlorohydrin (ECH) were used to fabricate the epoxy tanning agents, and polyalcohol compounds (glycerol, polyethylene glycol, ethylene glycol) were employed to introduce the ether bonds into the epoxy tanning agents to improve their compatibility with water. The prepared epoxy tanning agents were named IGE, IPE and IEE for the introduction of glycerol, polyethylene glycol and ethylene glycol, respectively. FT-IR and 1H NMR analysis indicated that epoxy groups, ether bonds and hexatomic rings were successfully introduced into IGE, IPE and IEE. The tanning performances of the epoxy tanning agents were further evaluated in water, ethanol-50 (50% of ethanol in water) and ethanol-95 (95% of ethanol in water) medium, which suggested that ethanol-50 was the most favorable one for the epoxy tanning agents. The IGE tanned leather exhibited the highest shrinkage temperature of 83ºC in ethanol-50 due to its low viscosity, high epoxy value and wide molecular dispersion. Morphology observation indicated that the IGE tanned leather exhibited better dispersion of fiber network than that of IPE and IEE tanned leathers. These results illustrated that IGE was an appropriate tanning agent in water-ethanol medium, which could be considered as a candidate for the organic tanning agents. Note de contenu : - EXPERIMENTAL : Materials - Synthesis of epoxide tanning agents - Characterization of epoxide tanning agents Fourier Transform Infrared (FT-IR) spectriscopy - Molecular weight determination - H NMR analysis - Determination of viscosity - Tanning trials - Evaluation of tanning performance shrinkage temperature - Absorption rate of tanning agent - Physical properties - Scanning Electron Microscope (SEM) observation - RESULTS AND DISCUSSION : Chemical structure analysis - Molecular weight and viscosity of as prepared epoxides - Evaluation of the tanning performance of prepared epoxides - Optimization of IGE tanning conditions - Morphology observation of tanned leather - Physical properties En ligne : https://drive.google.com/file/d/1ChD8Sr0kJz6k2u-XCTG2lhvZxRPOOdZC/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32655 [article]

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