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Application of Y-shaped polyurethane and polyacrylic acid as a complex retanning agent in aldehyde-tanned goat leather / Shuangquan Lai in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXII, N° 11 (11/2017)
[article]
Titre : Application of Y-shaped polyurethane and polyacrylic acid as a complex retanning agent in aldehyde-tanned goat leather Type de document : texte imprimé Auteurs : Shuangquan Lai, Auteur ; Yong Jin, Auteur ; Hanping Li, Auteur ; Lei Zhang, Auteur ; Xin Yin, Auteur Année de publication : 2017 Article en page(s) : p. 367-376 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Acide polyacrylique
Copolymères -- Synthèse
Copolymères séquencés
Cuirs et peaux -- Analyse
Cuirs et peaux -- Propriétés mécaniques
Cuirs et peaux -- Propriétés organoleptiques
Cuirs et peaux -- Propriétés physiques
Cuirs et peaux de chèvres
Glutaraldéhyde
Morphologie (matériaux)
Polymères amphiphiles
Polyuréthanes
Retannage
Tannage organiqueIndex. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : A kind of Y-shaped amphiphilic block polyurethane copolymers (PUGs) with different molecular weights were successfully synthesized to be used as retanning agent combined with polyacrylic acid (PAA) for modified glutaraldehyde tanned goatskin. The structures of resulting products were characterized by FTIR, and the molecular weights of products were measured with GPC. The application performances were investigated by measuring the organoleptic and physical mechanical properties of resulting leathers according to the alone or combined use of PUG and PAA, the molecular weight of PUG, and the offer percentage of retanning agent. The best performance was found in the leather retanned by PUG750 and PAA complex retanning agent at the total offer percentage of 4 wt%. Finally, the free formaldehyde contents in the leathers retanned with 4 wt% PUG750 and PAA at different pH conditions were analyzed with acetyl acetone colorimetric method. The mechanical properties as well as the fibers morphologies of the experimental and control groups were also investigated. The results demonstrated that when the pH value at the later stage of retanning process was controlled at 4.0 or 3.0, the free formaldehyde content was significantly reduced by 20.3% or 38% respectively ; and the physical mechanical properties of leathers were also very excellent to meet the performance requirements of goatskin garment leathers. According to these results, the method for using PUG and PAA as a complex retanning agent might be a good choice in chrome-free tanning process. Note de contenu : - MATERIALS AND METHODS : Materials - Synthesis of Y-shaped amphiphilic block polyurethane copolymers (PUGs) - Synthesis of polyacrylic acid (PAA) - Fourier Transform Infrared Spectra (FTIR) - Gel permeation chromatography (GPC) - Application of polyurethanes and polyacrylic acid - Analysis of leather properties - Scanning electron microscopy analysis - Determination of free formaldehyde contents in leathers
- RESULTS AND DISCUSSION : Synthesis of polyurethane copolymers and polyacrylic acid - Effect of different retanning agents on the organoleptic and physical properties of leathers - Effect of the molecular weight of PUG on the organoleptic and physical properties of leathers - Effect of the amount of complex retanning agent on the organoleptic and physical properties of leathers - Application of the complex retanning agent under different pH conditionsEn ligne : https://drive.google.com/file/d/1n0hhgDSLoOspbiCVezGLJhDkXewQevzZ/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29395
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXII, N° 11 (11/2017) . - p. 367-376[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 19363 - Périodique Bibliothèque principale Documentaires Disponible Synthesis and application of a new phosphate ester based on nonionic amphiphilic polyurethane as leather fatliquoring agent / Hanping Li in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXI, N° 12 (12/2016)
[article]
Titre : Synthesis and application of a new phosphate ester based on nonionic amphiphilic polyurethane as leather fatliquoring agent Type de document : texte imprimé Auteurs : Hanping Li, Auteur ; Yong Jin, Auteur ; Baozhu Fan, Auteur ; Rui Qi, Auteur ; Xinfeng Cheng, Auteur Année de publication : 2016 Article en page(s) : p. 427-434 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Caractérisation
Composés organiques -- Synthèse
Essais (technologie)
Ester de phosphate
Huiles et graisses
Polymères amphiphiles
Polyuréthanes
Produits de nourriture du cuir
Résistance au jaunissementIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : A new polyurethane phosphate ester (PUP-2) was successfully synthesized based on a nonionic amphiphilic polyurethane (PU-2). The structures and properties of PU-2 and PUP-2 were characterized by FTIR and surface tensiometer. The fatliquoring experiments were carried out in three different groups (treated with PUP-2 alone, with the complex of hexadecyl phosphate ester (SU) and PUP-2, or with the complex of SLP, PUP-2 and other commercialized fatliquoring agents, respectively). The physical and organoleptic properties of the resultant leathers were investigated and SEM was carried out in the study of fiber splitting. The leathers treated in the three different fatliquoring experiments all did not have fatty spew defect. Furthermore, the resultant leathers treated with PUP-2 alone or with the complex of SLP and PUP-2 had the advantage of resistance to yellowing. This new phosphate ester meets the requirements for the leathers with a good performance in resistance tu yellowing and avoiding fatty spew defect. Note de contenu : - EXPERIMENTAL : Materials - Synthesis of hexadecyl phosphate ester (SLP), PU-2 and PUP-2 - Application on leathers - Description of the experimental tests
- RESULTS AND DISCUSSION : Characterization of synthetic chemicals - Characterization of resultant leathersEn ligne : https://drive.google.com/file/d/1HTMSzJxTl7hB64oXFXNtzp7vWZ3hDN2h/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27324
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXI, N° 12 (12/2016) . - p. 427-434[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 18529 - Périodique Bibliothèque principale Documentaires Disponible