[article]
| Titre : |
Antimicrobial leather : preparation, characterization and application |
| Type de document : |
texte imprimé |
| Auteurs : |
Wang Zhiyuan, Auteur ; Haibin Gu, Auteur ; Wuyong Chen, Auteur |
| Année de publication : |
2013 |
| Article en page(s) : |
p. 154-165 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Antimicrobiens
Caractérisation
Encapsulation
Huile de clou de girofle
Polyuréthanes
|
| Index. décimale : |
675 Technologie du cuir et de la fourrure |
| Résumé : |
In order to produce a new kind of functional antimicrobial leather, that has the lasting ability to kill or inhibit microorganisms, we investigated the preparation and properties of PU-microencapsulated clove oil (PU-MCO). Firstly, the microcapsules were prepared by interfacial polymerization using polyurethane (PU) as the wall material. Results of optimization experiments show that when the ratios of shell-core, PEG-TDI and 0/W phase are 1:3 (w/w), 1:3 (mol ratio) and 15:85(w/w), respectively, the PU-MCO emulsion obtained is very stable and the encapsulation rate of clove oil can reach 94.3%. Laser particle, zeta potential analyzer, SEM, FT-IR, TG and GC-MS were used to characterize its size, shape, structure, components and stability. Results indicate that the microcapsule particles assume the spherical shape with average size of 0.2-1.0unn, and the main content of clove oil is not significantly affected by the microencapsulation. However, its heat stability has greatly improved and the starting decomposition temperature can be improved to 110°C or so. Meanwhile, the microencapsulated clove oil shows a good controlled-release property.
Results of antimicrobial tests reveal that, although the minimum inhibitory concentrations (MICs) of the microcapsule product are higher than that of crude clove oil, it still has sufficient antimicrobial activity against bacteria, yeasts and moulds.
Finally, the PU-MCO was applied in retanning goat garment leather. The leather shows good antimicrobial property which persists for a long time at room temperature and is not significantly affected by perspiration or washing because of the firm physical and chemical combination between the PU wall material and leather fibres. Thus, using the microencapsulated natural clove oil, we successfully provided a feasible method to prepare an antimicrobial leather with a non-toxic nature and long-term effectiveness. |
| Note de contenu : |
- EXPERIMENTAL PROCEDURES : Materials - Preparation of PU-microencapsulated clove oil - Characterization of PU-microencapsulated clove oil (Particle size - Optical microscope - Scanning electron microscope (SEM) - Gas chromatography-mass spectrometry (GC-MS) - Encapsulation rate - FT-IR - Thermal analysis - Release property - Antimicrobial activity) - Application of PU-MCL to wet-blue (Shrinkage temperature (Ts) - Antimicrobial activity of crust leathers - Controlled-release test - Water-washing test - Perspiration test)
- RESULTS AND DISCUSSION : Optimization of preparation conditions of PU-MCO (Particle size - Diversity and shape - GC-MS - FT-IR - TG and DSC - Release property - Antimicrobial activity) - Properties of antimicrobial leathers produced by PU-MCO (Antimicrobial property - Durability of antimicrobial property) |
| En ligne : |
https://drive.google.com/file/d/1jgZWx7SPuuAdcuvh4qjmtgEaJ-E_mA7y/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=19220 |
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 97, N° 4 (07-08/2013) . - p. 154-165
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