| Titre : |
Application and properties of modified wook keratin composites as film-forming agent for leather finishing |
| Type de document : |
texte imprimé |
| Auteurs : |
Zeng Chunhui, Auteur ; Qi Lu, Auteur |
| Année de publication : |
2014 |
| Article en page(s) : |
p. 269-274 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Allongement à la rupture
Composites
Couches minces -- Propriétés mécaniques
Cuirs et peaux -- Finition
EthanedialL'éthanedial ou glyoxal est un composé organique de formule brute C2H2O2 et de formule semi-développé O=CH-CH=O. Ce liquide de couleur jaune est le plus petit dialdéhyde existant. C'est aussi une forme tautomère de l'éthynediol (HO–C≡C–OH) .
Frottements (mécanique)
Hydroxyméthyle cellulose de sodium
Laine
Mélanges (chimie)
Perméabilité
Réticulation (polymérisation)
Solutions (chimie)
Traction (mécanique)
Vapeur d'eau
|
| Index. décimale : |
675 Technologie du cuir et de la fourrure |
| Résumé : |
A series of wool keratin/hydroxymethyl cellulose sodium (CMCNa/glyoxal composite membranes were prepared via solution blending and cross linking modification technology. The optimization of composite films preparation was critically investigated via orthogonal experimental design. Experimental results indicated that the cross-linking agent had a greater effect on the mechanical properties of films. Under the optimal condition (keratin/CMCNa weight ratio : 5.5, 0.3% glyoxal, reaction time : 1h, reaction temperature: 37°C), the composite membrane showed good tensile strength and maximum elongation, which can be used as film-forming agent in leather finishing. Moreover, in contrast to casein, the application properties of the leather finished by modified keratin composite film were measured : tensile strength increased by 11.3%, elongation at break improved by 25.7% as well as water vapour permeability by 3.76 %, and wet rub resistance fastness improved from 3 to 4. However, air permeability decreased by 15.1%. SEM and FTIR analysis verified that it has good compatibility, strong hydrogen bonds and covalent bonds formed between cross-linking agent and raw material molecules. The product might be great potentiel for application in leather finishing as film-forming agent instead of casein. |
| Note de contenu : |
- EXPERIMENTAL PROCEDURES : Materials - Preparation of wool keratin solution - Preparation of wool keratin/CMCNa/glyoxal composite membranes - Measurement of mechanical properties - Characterization - Application of modified wool keratin composite film in leather finishing - Determination of applied properties
- RESULTS AND DISCUSSION : SEM analysis - FTIR analysis - Orthogonal experiment results - Influence of cross-linking agent on mechanical properties - Application testing |
| En ligne : |
https://drive.google.com/file/d/1c5sNuqn9PQQCfw14uv6Ac4lbu0gDH0uN/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=22649 |
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 98, N° 6 (11-12/2014) . - p. 269-274
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