| Titre : |
On the use of an internal mixer to study the impregnation of carbon fillers by organic liquids |
| Type de document : |
texte imprimé |
| Auteurs : |
Meral Akkoyun, Auteur ; Christian Carrot, Auteur ; Benoît Blottière, Auteur |
| Année de publication : |
2014 |
| Article en page(s) : |
8 p. |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Carbonate de propylène
Charbon actif
Diméthylsulfoxyde
Malaxeurs et mélangeurs
Matériaux -- Imprégnation
Rhéologie
|
| Index. décimale : |
532.05 Mécanique des fluides et des liquides - Dynamique (cinétique et cinématique) |
| Résumé : |
lmpregnation of organic liquid electrolytes in conductive powders is of major importance in the field of energy storage devices such as batteries or super-capacitors. Impregnation during mixing and processing operations becomes usual for practical reasons and requires a better understanding of the changes of the rheological behavior of the mix. In this paper, the impregnation of propylene carbonate (PC) and dimethyl sulfoxide (DMSO) in activated carbon (AC) and carbon black (CB) was studied by using an internal mixer. Monitoring of the torque of the filler/liquid blend as a function of the amount of liquid fed in the mixing chamber, enables to detect the transition from the solid friction of the dry powder to the lubricated liquid (or viscous) behaviour of the concentrated paste of wetted powder. The results were compared with data obtained by conventional nitrogen adsorption porosimetry combined with the knowledge of the molecular diameter of the liquids. A characteristic change was observed as soon as the liquid completely fills the porosity of the filler. Both tested liquids (DMSO and PC) impregnate more carbon black and the take-up rate is slightly higher for DMSO in comparison to PC because, as a polar liquid, DMSO has a better interaction with both fillers. |
| Note de contenu : |
- MATERIALS AND METHODS : Materials - Experiments
- RESULTS AND DISCUSSION : Intrusion of DMSO and PC in activated carbon : results from internal mixer - Adsorption of DMSO and PC on activated carbon : results from nitrogen porosimetry - Adsorption of DMSO and PC on activated carbon : the transition from frictional to hydrodynamic regime - Intrusion of DMSO and PC in carbon black - Comparison of the intrusion of PC and DMSO in activated carbon and carbon black |
| Référence de l'article : |
13487 |
| DOI : |
10.3933/ApplRheol-24-13487 |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=21554 |
in APPLIED RHEOLOGY > Vol. 24, N° 1 (2014) . - 8 p.
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