[article]
| Titre : |
Nano-TiO2 in-situ hybrid polyurethane with enhanced permeability for PU leather manufacture |
| Type de document : |
texte imprimé |
| Auteurs : |
Chen Yi, Auteur ; Zhang Xiuli, Auteur ; Haojun Fan, Auteur ; Bi Shi, Auteur |
| Année de publication : |
2009 |
| Article en page(s) : |
p. 222-231 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Index. décimale : |
675 Technologie du cuir et de la fourrure |
| Résumé : |
A novel organic-inorganic nano-hybrid process combined with industrialized wet-phase inversion coating-forming method was developed for the modification of polyurethane (PU) leather coating with in-situ-generated nano-TiO2. The cross section morphologies, water vapor permeability, gas permeability, mesopore size distribution and specific surface area of the hybrid samples were investigated. SEM analysis indicated that when the TiO2 concentration increased from 0.25wt% to 1.00wt%, the average size of nano particles, which dispersed uniformly throughout the polymer matrix, increased correspondingly from 60-80nm to 90-120nm without obvious agglomerates observed. After nano hybridization, both water vapor and gas (hydrogen, nitrogen and oxygen) permeability of samples were found to increase with an increasing concentration of nano-TiO2, which was explained as voids formed at the polymer-nano particle interface due to phase incompatibility. The existence of such voids in samples was proven in the nitrogen adsorption/desorption experiment, by the detection of extra mesopores and higher specific surface area than predicted values. With industrial applicability in the manufacture of PU synthetic leather, the wet-phase inversion hybrid process developed in this study may be of great potential for improving the wear comfort of PU coated leather products. |
| En ligne : |
https://drive.google.com/file/d/1LTDoSWaTJBLxAnAf8ybzWgidq7pSR9rK/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5987 |
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CIV, N° 6 (06/2009) . - p. 222-231
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Nano-TiO2 in-situ hybrid polyurethane with enhanced permeability for PU leather manufacture in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CIV, N° 6 (06/2009)
