Titre : |
Two-stage temperature change chrome tanning : A more sustainable tanning process |
Type de document : |
texte imprimé |
Auteurs : |
Hui Zeng, Auteur ; Weixing Xu, Auteur ; Bi Shi, Auteur |
Année de publication : |
2019 |
Article en page(s) : |
p. 153-162 |
Note générale : |
Bibliogr. |
Langues : |
Américain (ame) |
Catégories : |
Absorption Caractérisation Croûte (cuir)On entend par "cuir en croûte" des cuirs ayant subi les opérations jusqu'au tannage, à l'exclusion de toute opération de corroyage ou de finissage, mais qui, par opposition aux wet-blue ont été séchés. Cuirs et peaux -- Propriétés mécaniques Cuirs et peaux de bovins Surfaces -- Analyse Tannage au chrome Température Wet-blue (tannage)Peau tannée au chrome (le chrome donne une couleur bleue)
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Index. décimale : |
675.2 Préparation du cuir naturel. Tannage |
Résumé : |
Under the guidance of molecular simulation of Cr(III) species in water solution, a novel chrome tanning process, the two-stage temperature change chrome tanning, was developed. In stage I, the pickled cattle hide was first tanned by a small amount of chrome tanning agent under room temperature to obtain basic hydrothermal stability. Then, in stage II, the pre-tanned wet-blue was tanned again under a high temperature (≥ 60°C) to enhance the reactivity of Cr(III) with collagen fibers. The shrinkage temperature of crusts, the absorptivity of chrome tanning agent and fatliquoring agent, the mechanical property and surface morphology of crusts were characterized to evaluate the tanning effect. The results showed that when the dosage of chrome tanning agent in two stages was 2 wt% (tanned under room temperature) and 1 wt% (tanned under 60°C), respectively, the best performances of crust were achieved. In these conditions, the shrinkage temperature of crust was 104.6°C. The comprehensive absorptivity of chrome tanning agent reached up to 96.3%. The absorptivity of fatliquoring agent in wet-blue was 90.2%. The mechanical property and grain fineness of the crust were comparable to those of conventional chrome tanned crust with 6 wt% chrome tanning agent. As a result, an efficient and more sustainable chrome tanning process with less offer of chrome tanning agent was achieved. |
Note de contenu : |
- EXPERIMENTAL : Materials and equipment - preparation of chrome tanned samples (wet-blue/crusts) - The main Cr(III) species under different temperature - Measurements and instruments
- RESULTS AND DISCUSSION : The states of Cr2(SO4)3 in water solution at penetration stage and combination stage of chrome tanning - Effect of tanning conditions on properties of wet-blue/crusts - Effect of tanning conditions on Ts of crusts - Effect of tanning conditions on comprehensive absorptivity of chrome tanning agent
- Effect of tanning conditions on Cr2O3 content of wet-blue - Effect of tanning conditions on mechanical property of crusts - Effect of tanning conditions on grain morphology of crusts - Effect of tanning conditions on the chrome distribution in experimental wet-blue - Further optimization of the temperature change chrome tanning technology - Effect of chrome tanning agent dosage in stage II on tanning effect of experimental wet-blue/crusts - Effect of the chrome tanning agent dosage in stage II on the properties of experimental crusts |
En ligne : |
https://drive.google.com/file/d/1wQIwx4fNXcMH-sJ-KpQZiW-bbAkzYMCd/view?usp=drive [...] |
Format de la ressource électronique : |
Pdf |
Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32475 |
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXIV, N° 5 (05/2019) . - p. 153-162