| Titre : |
Synthesis and properties of castor oil-based waterborne polyurethane cloisite 30B nanocomposite coatings |
| Type de document : |
texte imprimé |
| Auteurs : |
Siva Sankar Pandar, Auteur ; Bishnu Prasad Panda, Auteur ; Smita Mohanty, Auteur ; Sanjay K. Nayak, Auteur |
| Année de publication : |
2017 |
| Article en page(s) : |
p. 377-394 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Cloisite
Huile de ricin et constituants
Morphologie (matériaux)
Polymères en émulsion
Polyuréthanes
Revêtements -- Analyse:Peinture -- Analyse
Revêtements -- Propriétés thermiques:Peinture -- Propriétés thermiques
Revêtements en phase aqueuse:Peinture en phase aqueuse
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
Waterborne polyurethane dispersions (WPUDs) were synthesized successfully from castor oil-based polyol, isophorone diisocyanate and dimethylol propionic acid with NCO/OH ratio of 1.5. Different weight percentages of cloisite 30B (1, 2, and 3 wt%) were loaded with WPUDs to prepare nanocomposite films. Prepared prepolymer and nanocomposite films were characterized using FTIR, XRD, SEM, TEM, DSC, and TGA techniques, and coating properties, such as pencil hardness, abrasion resistance, impact resistance, and contact angle, were evaluated. The results obtained from different amounts of clay loading were compared with the pristine castor oil-based WPUDs. The FTIR spectra deconvolution technique was used to study the hydrogen bonding effect within the polymer with an increase in clay content. TGA analysis showed that the thermal stability of WPUDs increases with cloisite 30B (C30B) content. The surface morphology and hydrophilicity/hydrophobicity nature of the nanocomposite films were characterized using scanning electron microscopy and contact angle measurement. The results obtained from tensile tests indicated that the mechanical property of the dispersion system improved with C30B content. A high-performance castor oil-based nanocomposite coating with low volatile organic component can be targeted as an outcome of this work. |
| Note de contenu : |
- EXPERIMENTAL : Materials - Synthesis of CO-based PU-C30B waterborne nanocomposite film - Preparation of nanocomposite films - Instrument characterization
- RESULTS AND DISCUSSION : FTIR analysis - Characterization of hydrogen bonding via FTIR - Morphological studies - Mechanical properties |
| DOI : |
10.1007/s11998-016-9855-8 |
| En ligne : |
https://link.springer.com/content/pdf/10.1007%2Fs11998-016-9855-8.pdf |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28153 |
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 14, N° 2 (03/2017) . - p. 377-394
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