[article]
| Titre : |
Semi-rigid composite foams of calcium sodium aluminosilicate from eggshells embedded in polyurethane |
| Type de document : |
texte imprimé |
| Auteurs : |
N. Tangboriboon, Auteur ; L. Mulsow, Auteur ; W. Sangwan, Auteur ; Anuvat Sirivat, Auteur |
| Année de publication : |
2018 |
| Article en page(s) : |
p. 2-12 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Aluminosilicates
Calcium
Composites
Mousses plastiques
Polyuréthanes
Poudres
SodiumLe sodium est un élément chimique, de symbole Na et de numéro atomique 11. C'est un métal mou et argenté, qui appartient aux métaux alcalins. On ne le trouve pas à l'état de corps pur dans la nature, mais il est très abondant sous forme de composés, par exemple dans le sel. Il brûle avec une flamme jaune.
Le sodium possède 22 isotopes connus, avec un nombre de masse variant entre 18 et 37.
Sol-gel, Procédé
Thermocinétique
|
| Index. décimale : |
668.4 Plastiques, vinyles |
| Résumé : |
Calcium sodium aluminosilicate (CaNaAlSi2O7) ceramic powder was prepared from eggshells as a raw material via the sol-gel process at room temperature. The CaNaAlSi2O7 ceramic particles were embedded as a dispersed phase in the polyurethane (PU) foam matrix via a direct foaming process. The calcium sodium aluminosilicate (CaNaAlSi2O7) ceramic powder had a high specific surface area of 38.89 m2 g−1, and a fine average particle size of 13.27 μm, whereas the PU foam had a low specific surface area of 1.00 m2 g−1, and of light weight. After adding 10 vol% CaNaAlSi2O7 to the PU, the composite foams possessed a high specific surface area of 6.0 m2 g−1, a bulk density of 0.213 ± 0.012 g cm−3, a high decomposition temperature of 790 °C, and a high compressive Young's modulus of 346.0 ± 76.5 kPa. The CaNaAlSi2O7/PU composite foams provided good thermal conductivity, uniform pore size and particle size distribution, good bridge bonding, and with microcellular interconnecting cells. The CaNaAlSi2O7/ PU semi-rigid composite foams are potential candidate materials for a variety of products such as construction materials, catalysts, insulation materials, and adsorbent materials. There are several advantages of the semi-rigid composite foams: light weight, high specific surface area, and high thermal decomposition temperature. |
| Note de contenu : |
- EXPERIMENTAL : Materials - Instruments - CaNaAlSi2O7 powder preparation by sol-gel process - Micro-cellular polyurethane or polyurethane foams preparation - CaNaAlSi2O7/PU composite foams preparation
- RESULTS AND DISCUSSION : Physical properties of raw materials, PU foams, and composite foaams - Characteristics of pure PU foams and CaNaAlSi2O7/PU composite foams - Compression tests and thermal conductivity of the pure polyurethane foams (PU foams) and the 10 vol% CaNaAlSi2O7/PU composite foams |
| DOI : |
10.3139/217.3251 |
| En ligne : |
https://drive.google.com/file/d/1z_kpdaf72loPOIIjsKPvYGkPoVtYMAL_/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30153 |
in INTERNATIONAL POLYMER PROCESSING > Vol. XXXIII, N° 1 (03/2018) . - p. 2-12
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Semi-rigid composite foams of calcium sodium aluminosilicate from eggshells embedded in polyurethane in INTERNATIONAL POLYMER PROCESSING, Vol. XXXIII, N° 1 (03/2018)
