| Titre : |
Production of carboxymethyl starches from oxidized starches and determination of their tanning characteristics |
| Type de document : |
texte imprimé |
| Auteurs : |
Hasan Ozgunay, Auteur |
| Année de publication : |
2021 |
| Article en page(s) : |
p. 187-197 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Agents de tannage
Amidons -- Oxydation
Caractérisation
Carboxyméthylation
Cuirs et peaux -- Propriétés organoleptiques
Cuirs et peaux -- Propriétés physiques
Essais (technologie)
Solubilité
Tannage
Tannage synthétique
|
| Index. décimale : |
675.2 Préparation du cuir naturel. Tannage |
| Résumé : |
Hydrogen peroxide and sodium metaperiodate oxidation of starch and their possible utilization in tanning/retanning were examined in our previous studies. In the present part, accordingly with our previous findings, hydrogen peroxide and sodium metaperiodate oxidation products having appropriate molecular weight/size were selected and additionally carboxymethylated. The yields of the processes (carboxymethyl starches) were characterized comprehensively and the effect of carboxymethylation process on structures and tanning abilities were tried to be identified. The characterization results revealed that the carboxymethyl groups were successfully included into the structure and the water solubility of oxidized starches (especially periodate oxidized ones) increased by carboxymethylation process. From the evaluation of the tanning results and considering its properties i.e. gentle tanning effect with less astringency and correspondingly a relatively soft leather handle and smooth grain, it is concluded that dialdehyde carboxymethyl starch (CMS 1:0.7) can be utilized as yet another good alternative sustainable green tanning/retanning agent from starch. |
| Note de contenu : |
- METHODS : Carboxymethylation of H2O2 and NaIO4 oxidized starch samples - Determination of degrees of substitutions - Determination of water solubility of CMSs - Structure characterizations - Tanning trials - Determination of tanning effects
- RESULTS AND DISCUSSION : The yields of carboxymethylated starches (CMSs) - Degree of substitutions (DS) - Water solubility of CMSs - Characterizations of CMSs - Tanning effects of CMSs
- Table 1 : Tanning recipe for carboxymethylated HO2O oxidized starches (CMS 1:7, CMS 1:9 1:11)
- Table 2 : Tanning recipe for carboxymethylted periodate oxidized starches (DCMSs) (CMS 1.0.3, CMS 1:0.5, CMS 1:0.7)
- Table 3 : tanning properties of CMSs
- Table 4 : Physical properties of tanned pelt pieces and whole leather
- Table 5 : Cracking and bursting values of tanned whole leather with CMS 1:0.7
- Table 6 : Organoleptical properties of tanned lethers with CMSs |
| DOI : |
https://doi.org/10.34314/jalca.v116i6.4311 |
| En ligne : |
https://drive.google.com/file/d/1nsRfQYGYF6ykV4HzwNw210bB6ssE_8qA/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36041 |
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXVI, N° 6 (06/2021) . - p. 187-197
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