A facile preparation of a novel non-leaching antimicrobial waterborne polyurethane leather coating functionalized by quaternary phosphonium salt / Wang Chunhua in JOURNAL OF LEATHER SCIENCE AND ENGINEERING, Vol. 2 (Année 2020)  

[article]  inJOURNAL OF LEATHER SCIENCE AND ENGINEERING > Vol. 2 (Année 2020) . - 12 p. Titre : A facile preparation of a novel non-leaching antimicrobial waterborne polyurethane leather coating functionalized by quaternary phosphonium salt Type de document : texte imprimé Auteurs : Wang Chunhua, Auteur ; Jianhui Wu, Auteur ; Changdao Mu, Auteur ; Wei Lin, Auteur Année de publication : 2020 Article en page(s) : 12 p. Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Ammoniums quaternaires Antibactériens Caractérisation Composés organiques -- Synthèse Cuir Essais (technologie) Formulation (Génie chimique) Polymères en émulsion Polyuréthanes Revêtements Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : The aim of this research is to develop a novel non-leaching antimicrobial waterborne polyurethane (WPU) leather coating material with covalently attached quaternary phosphonium salt (QPS). The structure of the QPS-bearing WPU has been identified, and their thermal stability, mechanical property, and antimicrobial performance have been investigated. The results reveal that the incorporation of QPS slightly reduces the thermal stability of WPU material but would not affects its usability as leather coating. Despite the presence of hydrophobic benzene in QPS structure, the strong hydration of its cationic groups leads to the increased surface contact angle (SCA) and water absorption rate (WAR) of the films, suggesting that the water resistance of the films needs to be improved for the purpose of leather coatings. Antibacterial tests demonstrate that when the QPS content is 20 wt%, QPS-bearing WPU shows effective antimicrobial activity against bacteria. The WPU containing QPS prepared in this study is a non-leaching antimicrobial material and has great potential application as leather coating. Note de contenu : - Materials - Synthesis of dihydroxy-terminated QPS (HQPS) - Synthesis of QPS-bearing WPU - Characterization methods - Testing of antibacterial property - Table 1 : Formulations and characteristics of WPU DOI : 10.1186/s42825-019-0014-8 En ligne : https://link.springer.com/content/pdf/10.1186/s42825-019-0014-8.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37138 [article]

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Life cycle assessment and leather production / Diego Navarro in JOURNAL OF LEATHER SCIENCE AND ENGINEERING, Vol. 2 (Année 2020)  

[article]  inJOURNAL OF LEATHER SCIENCE AND ENGINEERING > Vol. 2 (Année 2020) . - 13 p. Titre : Life cycle assessment and leather production Type de document : texte imprimé Auteurs : Diego Navarro, Auteur ; Jianhui Wu, Auteur ; Wei Lin, Auteur ; Pere Fullana-i-Palmer, Auteur ; Rita Puig, Auteur Année de publication : 2020 Article en page(s) : 13 p. Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cuir Cuirs et peaux -- Déchets Durée de vie (Ingénierie) Production Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Leather industry is facing new trends on production and consumption patterns due to society concerns. Circular economy is proposing a transition from the current economic model to a more sustainable one, in which waste is designed out and resources will be reused and recycled as long as possible. In this transition, Life Cycle Assessment (LCA) is an important tool to help decision-making. In the present review, 39 English-written peer-reviewed papers related to LCA and leather have been found, 30 of which were published in the last 6 years, meaning LCA is nowadays an important subject. Papers are presented within 4 types, focused on: 1) the whole leather production process, 2) a single step in the production process (e.g, new technologies for unhairing), 3) waste treatment and recycling, and 4) life cycle thinking with ideas on long-term strategies for leather industries. As discussed in the literature review, leather industry has important challenges to address: increasing sustainability and transparency on the supply chain, and strengthening the beauty of leather. Taking up these challenges from a life cycle perspective will help leather industry flourish in the coming future. Note de contenu : - Details on LCA methodology - Methodology - Table 1 : LCA studies which include the complete leather production process - Table 2 : LCA papers found in the literature, studying a specific part of the leather production - Table 3 : LCA papers studying leather-waste treatment processes - Table 4 : Life cycle thinking papers related to leather production DOI : https://doi.org/10.1186/s42825-020-00035-y En ligne : https://link.springer.com/content/pdf/10.1186/s42825-020-00035-y.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37459 [article]

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Pickering aqueous foam templating : a promising strategy to fabricate porous waterborne polyurethane coatings / Jianhui Wu in COLLAGEN AND LEATHER, Vol. 5 (2023)  

[article]  inCOLLAGEN AND LEATHER > Vol. 5 (2023) . - 4 p. Titre : Pickering aqueous foam templating : a promising strategy to fabricate porous waterborne polyurethane coatings Type de document : texte imprimé Auteurs : Jianhui Wu, Auteur ; Jiajing Zhou, Auteur ; Zhenghao Shi, Auteur ; Chunhua Wang, Auteur ; To Ngai, Auteur ; Wei Lin, Auteur Année de publication : 2023 Article en page(s) : 4 p. Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Emulsions pickering Matériaux poreux Mousses plastiques Polymères en émulsion Polyuréthanes Revêtements en phase aqueuse Index. décimale : 667.9 Revêtements et enduits Résumé : Waterborne polyurethane (WPU) has been widely used as coatings in industrial fields ranging from wood, real/synthetic leather, and textiles, because it exhibits versatile performance, excellent eco-friendliness, and superior film-forming property. In terms of wearable products, compact WPU coatings often cause discomfort due to the intrinsic poor vapor transmission. Moreover, the resultant relatively high humidity promotes the growth of skin flora, resulting in unpleasant odors, and even skin infectious diseases. To this end, breathable porous WPU coatings with tunable pore size has emerged as a favorable alternative to modulate the “climate” of microenvironment at the interface between skins and wearable products. Several strategies have been now developed to engineer porous WPU coatings. In this perspective, we describe various strategies that have been developed to manufacture porous WPU coatings. According to whether the template is used and the category of templates used, we categorize these strategies into three different types, including hard templating, soft templating, and template-free methods. We discuss the advantages and disadvantages of each strategy and highlight the importance in developing new strategies of making highly breathable WPU to help the sustainable growth of the leather industry. Note de contenu : - Hard templating - Soft templating - Template-free method - Pickering aqueous foam templating DOI : https://doi.org/10.1186/s42825-023-00115-9 En ligne : https://link.springer.com/content/pdf/10.1186/s42825-023-00115-9.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40064 [article]

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