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An innovative new application of hydrogen peroxide to accelerate chamois leather tanning. Part II : Effect of oxidation times on the quality of chamois leather / Ono Suparno in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CVIII, N° 5 (05/2013)
[article]
Titre : An innovative new application of hydrogen peroxide to accelerate chamois leather tanning. Part II : Effect of oxidation times on the quality of chamois leather Type de document : texte imprimé Auteurs : Ono Suparno, Auteur ; E. Gumbira-Sa'id, Auteur ; Ika A. Kartika, Auteur ; Muslich, Auteur ; Shiva Amwaliya, Auteur Année de publication : 2013 Article en page(s) : p. 180-187 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Cuirs et peaux -- Analyse
Cuirs et peaux -- Propriétés mécaniques
Cuirs et peaux de Chamois
Oxydation
Peroxyde d'hydrogèneLe peroxyde d'hydrogène (H2O2), communément appelé eau oxygénée ou encore perhydrol (appellation industrielle), est un composé chimique liquide et visqueux, aux puissantes propriétés oxydantes (il est aussi réducteur). C'est donc un agent blanchissant efficace qui sert de désinfectant et (à haute concentration) d'oxydant ou monergol dans les fusées spatiales.
TannageTags : Prétannage 'Huile tannage' 'Analyses cuir' Microscopie 'Résistance déchirement' traction' 'Allongement rupture' 'Absorption eau' 'Propriétés chimiques' pH 'Teneur huile' cendres' organoleptiques' Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : The use of oxidizing agent, such as hydrogen peroxide, was reported to shorten the oxidation process time of chamois tanning. Appropriate conditions for this tanning are needed in order to improve its process efficiency, and to obtain a satisfactory leather quality. The objectives of our study were to investigate the effects of oxidation times in chamois tanning on the quality of the resulting leather, and to determine the best condition of the oxidation time. The experiments were conducted by tanning pickled goatskin for 4, 6, and 8 hours oxidation times inside a rotary drum, and 1, 2, and 3 days of oxidation times outside the drum. The physical, chemical, and organoleptic properties of the leathers were then tested. This study showed that they fulfilled the quality requirements for chamois leather. The best conditions for oxidation were oxidation times of eight hours inside, and one day outside a rotary drum. Therefore, the use of hydrogen peroxide oxidizing agent shortened the oxidation process outside the rotary drum in chamois leather production from nine to two days. Note de contenu : - EXPERIMENTAL : Materials and equipment - Pretanning - Oil tanning - Microscopic studies - Analyses of leather
- RESULTS AND DISCUSSION : Microscopic studies - Tear strength - Tensile strength - Elongation at break - Water absorption - Chemical properties - pH - Oil content - Ash content - Organoleptic propertiesEn ligne : https://drive.google.com/file/d/1yuQr-YCAsC7h9HrOOXaUYrM0KqU30fdr/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18546
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CVIII, N° 5 (05/2013) . - p. 180-187[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 15060 - Périodique Bibliothèque principale Documentaires Disponible Aqueous polyurethane dispersions : Effect of DMPA and acrylic polyol on dispersion and physical properties of emulsion cast films / K. G. Raut in PAINTINDIA, Vol. XLVIII, N° 9 (09/1998)
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Titre : Aqueous polyurethane dispersions : Effect of DMPA and acrylic polyol on dispersion and physical properties of emulsion cast films Type de document : texte imprimé Auteurs : K. G. Raut, Auteur ; S. S. Tanvade, Auteur ; S. R. Srinivasan, Auteur Année de publication : 1998 Article en page(s) : p. 105-109 Note générale : Bibliogr. Langues : Anglais (eng) Tags : 'Peinture eau' émulsion' Liant 'Uréthanne polymère' Formulation Préparation 'Dimension particule' 'Propriété mécanique' Feuil 'Résistance traction' 'Allongement rupture' 'Relation composition propriété' 'Matériau revêtement' Index. décimale : 667.9 Revêtements et enduits Résumé : The effect of acrylic polyol on properties of emulsion cast films of polyurethane (PU) ionomers has been examined. Isocyanate terminated prepolymers prepared primarily from isophorone diisocyanate (IPDI) and polyoxy propylene glycol (PPG) of MW 1000 were chain extended with trimethylol propane (TMP) and dimethylol propionic acid (DMPA) as potential ionic centers. The urethane forming reaction was carried out in N-methyl-2-pyrollidone (NMP) using dibutyl tin dilaurate (DBTDL) as catalyst. The effects of DMPA and acrylic polyol (AP) on the particle size and its distribution have been studied by automizer. The mechanical properties of the emulsion cast films were determined using Universal tensile tester (Instron). Thermal properties have been studied by using TGA and DSC. It has been observed that the particle size decreased with increase of DMPA content and increased with AP content. Tensile strength decreased, but elongation at break increased with the increase of DMPA content, whereas tensile strength increased and elongation at break decreased with the increase of AP content. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=13188
in PAINTINDIA > Vol. XLVIII, N° 9 (09/1998) . - p. 105-109[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 006479 - Périodique Bibliothèque principale Documentaires Disponible