Titre : |
Application of nonionic gemini aliphatic polyurethane surfactant for improving the performance of vegetable tanned leather |
Type de document : |
texte imprimé |
Auteurs : |
Shuangquan Lai, Auteur ; Yong Jin, Auteur ; Liangjie Shi, Auteur ; Shenghua Wang, Auteur ; Heng Yang, Auteur |
Année de publication : |
2019 |
Article en page(s) : |
p. 403-412 |
Note générale : |
Bibliogr. |
Langues : |
Américain (ame) |
Catégories : |
Acide polyacrylique Agents de tannage Collagène Cuirs et peaux -- Analyse Cuirs et peaux -- Propriétés mécaniques Cuirs et peaux -- Propriétés organoleptiques Morphologie (matériaux) Photostabilité Polymères -- Synthèse Polymères aliphatiques Retannage Surfactants Surfactants -- Synthèse Tannage végétal Température de retrait
|
Index. décimale : |
675.2 Préparation du cuir naturel. Tannage |
Résumé : |
Vegetable tanned leathers with good embossing, air permeability, natural look and pleasing firm handle properties have applied in many goods with multiple uses. However, the performances of vegetable tanned leathers still need a further improvement. In this work, a kind of nonionic gemini aliphatic polyurethane surfactants (GPUs) with different hydrophobic chain lengths as a retanning agent combined with polyacrylic acid (PAA) for condensed tannin tanned leathers to improve their performances. The effects of the alone or combined use of the PAA and GPU, the hydrophobic chain length of GPU, and the offer percentage of retanning agent were studied by evaluating the organoleptic properties, shrinkage temperature, mechanical properties of the obtained leathers. The best performance was found in the leather retanned with PAA and 12-GPU-550 complex retanning agent, and the mechanical properties of leather could be improved when the total offer percentage was controlled at 4 wt%. Moreover, the collagen fibers morphologies and lightfastness properties of leathers retanned with different retanning agents were investigated. The results showed that the total color difference ΔE and the yellowness index Δb decreased significantly with the introduction of 12-GPU-550, and the leather retanned with PAA and 12-GPU-550 complex retanning agent showed the lowest value of ΔE, demonstrating that the lightfastness properties were improved significantly. Therefore, it was an attractive way to combine use of PAA and 12-GPU-550 as complex retanning agent, which can improve the mechanical and lightfastness properties of vegetable tanned leathers simultaneously. |
Note de contenu : |
- MATERIALS AND METHODS : Materials - Synthesis of polyacrylic acid (PAA) - Synthesis of nonionic gemini aliphatic polyurethane surfactants (GPUs) - Application of the synthesized retanning agents - The organoleptic and physical mechanical properties of leathers - Scanning Electron Microscopy analysis of leathers - Light fastness properties of leathers
- RESULTS AND DISCUSSION : Effects of different retanning agents on the properties of leathers - Effect of the hydrophobic chain length of GPU on the properties of leathers - Effect of the offer percentage of complex retanning agent on the properties of leathers - SEM analysis of leathers - Effects of retanning agents on the lightfastness properties of leathers |
En ligne : |
https://drive.google.com/file/d/1ajQdsq8W9LW8sFu6kytH1lIoq_J-RMzI/view?usp=drive [...] |
Format de la ressource électronique : |
Pdf |
Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33252 |
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXIV, N° 11 (11/2019) . - p. 403-412