An experimental comparative study on silicone oil and polyethylene glycol as dry leather treatments / Alireza Koochakzaei in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXI, N° 10 (10/2016)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXI, N° 10 (10/2016) . - p. 377-382 Titre : An experimental comparative study on silicone oil and polyethylene glycol as dry leather treatments Type de document : texte imprimé Auteurs : Alireza Koochakzaei, Auteur ; Hossein Ahmadi, Auteur ; Mohsen Mohammadi Achachluei, Auteur Année de publication : 2016 Article en page(s) : p. 377-382 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Additifs Antioxydants Colorimétrie Cuirs et peaux -- Conservation Cuirs et peaux -- Propriétés mécaniques Essais accélérés (technologie) Huile de silicone pH -- Mesure Polyéthylène glycol Produits de nourriture du cuir Température de retrait Vitamine C Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : The application of leather dressing and lubricants is one of the important challenges in conservation of historic dry leathers, due to their effects on structural and visual properties and stability of leathers. This study aimed to investigate influence and stability of silicone oil and polyethylene glycol (PEG) on treated dry leathers, and application assessment of ascorbic acid (AA) as an antioxidant additive for PEG. The polymers, untreated and treated leather samples were submitted to heat accelerated ageing process. FTIR spectroscopy, colorimetry, pH measurements, investigation of mechanical properties and shrinkage temperature (Ts) were used to explain effect of treatments. Also, the oxidation of polymers during ageing process was monitored by FTIR spectroscopy. Results showed that silicone oil has better stability against thermal oxidation with compared to PEG. Ascorbic acid inhibited the PEG oxidation. Moreover, results revealed that the silicone oil has a better performance in treatment of dry leather than PEG or PEG+AA, due to its high stability and minimum changes in visual, structural and mechanical properties in treated leathers. Note de contenu : - Accelerated aging of lubricants - Leather treatment and accelerated aging - Colorimetry - pH measurement - ATR-FTIR spectroscopy - Shrinkage temperature - Mechanical properties En ligne : https://drive.google.com/file/d/1kaMnDuI0gNV2r8Ix-H-sN-35-0UAjvN1/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27027 [article]

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Performance evaluation of dimethyl silicone oil as archaeological dry leather lubricant / Alireza Koochakzaei in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXV, N° 4 (04/2020)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXV, N° 4 (04/2020) . - p. 140-144 Titre : Performance evaluation of dimethyl silicone oil as archaeological dry leather lubricant Type de document : texte imprimé Auteurs : Alireza Koochakzaei, Auteur ; Hossein Ahmadi, Auteur ; Mohsen Mohammadi Achachluei, Auteur Année de publication : 2020 Article en page(s) : p. 140-144 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Antiquités (objets anciens) -- Conservation et restauration Calorimétrie Chimie en archéologie Essais accélérés (technologie) Fourier, Spectroscopie infrarouge à transformée de Huile de silicone Huile de silicone diméthylique Huiles lubrifiantes Produits de nourriture du cuir Réflexion totale atténuée Température de retrait Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : This study aimed to investigate the treatment effect of dimethyl silicone oil on archaeological dried leather. Leather samples, without treatment and treated in a vacuum, were submitted to an accelerated aging at 100°C for 72 hours. In order to evaluate the efficacy of treatment, leather characteristics were examined before and after treatment with dimethyl silicone oil and after accelerated aging. Colorimetry, ATR-FTIR spectroscopy, shrinkage temperature measurement and differential scanning calorimetry were used to examine the leather characteristics and the effectiveness and stability of treatment. The results revealed that the dimethyl silicone oil has a suitable performance in the treatment of dry leather. The results also showed that the use of dimethyl silicone oil significantly reduces the changes in leather during accelerated aging. In other words, dimethyl silicone oil treatment improves the leather stability against deterioration. Note de contenu : - Leather treatment and accelerated aging - Colorimetry - ATR-FTIR spectroscopy - Shrinkage temperature - Differential Scanning Calorimetry (DSC) DOI : https://doi.org/10.34314/jalca.v115i4.3800 En ligne : https://drive.google.com/file/d/1m64ZSdILQkswJ0C9JhyPznXYRRHjJLo7/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34159 [article]

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