Fungal deterioration on ancient leather artifacts / Zonghuan Ba in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVIII, N° 12 (12/2023)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXVIII, N° 12 (12/2023) . - p. 529-535 Titre : Fungal deterioration on ancient leather artifacts Type de document : texte imprimé Auteurs : Zonghuan Ba, Auteur ; Zhang Mingrui, Auteur ; Yulong Chen, Auteur ; Yizhe Cao, Auteur ; Zhuofan Hu, Auteur Année de publication : 2023 Article en page(s) : p. 529-535 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Antiquités (objets anciens) -- Analyse Cuirs et peaux -- Détérioration Détérioration fongique Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Fungal deterioration of ancient leather artifacts is a significant problem for museums and archives, as it might cause significant damage to the valuable cultural heritage. The growth of fungi on these artifacts is affected by such environmental factors as temperature, relative humidity, pH, and light exposure. The environmental factors that contribute to fungal growth and the impact fungi on the deterioration of ancient leather artifacts are discussed here. An overview is summarized on the strategies to prevent and control fungal deterioration, including the environmental control, the use of biocides, and conservation treatments, which is proposed to provide a valuable guidance for the preservation of ancient leather artifacts. Note de contenu : - Factors affecting fungal growth - Fungi on ancient leather artifacts - Biodeterioration mechanisms of leather by fungi - Conservation and restoration - Table 1 : The optimal temperature of Aspergillus, Penicilium, Eurotium and Cladosporium - Table 2 : Fungi found on ancient leather artifacts associated with leather process DOI : https://doi.org/10.34314/jalca.v118i12.8261 En ligne : https://drive.google.com/file/d/1W-fjSYxQh0U36AvB7mVi1sglbZjpCM6d/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40272 [article]

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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]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 103, N° 5 (09-10/2019) . - p. 241-246 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 surface Index. 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 leather En ligne : https://drive.google.com/file/d/1a7ysIBvAylOjF7xzoza9B0FDXMN8dg4j/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32998 [article]

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