-
- B. Cabane
- Equipe mixte CEA-RP, Service de Chimie Moléculaire, CEA-Saclay, 91191 Gif sur Yvette, France
-
- K. Wong
- Rhone-Poulenc, 93308 Aubervilliers, France
-
- P. Lindner
- Institut Laue Langevin, B.P. 156, 38042 Grenoble Cedex 9, France
-
- F. Lafuma
- Physico-chimie Macromoléculaire, ESPCI, 10 rue Vauquelin, 75231 Paris, France
抄録
<jats:p>Nanometric silica particles, dispersed in water, have been bridged into long necklaces by adsorbing macromolecules of poly(ethylene oxide). At high coverage of particles by macromolecules the necklaces repel each other and the dispersions are homogeneous solutions; at low coverage the necklaces bind to each other and a concentrated phase separates from excess water. It is reported here that shear induced gelation and shear induced flocculation are observed near the boundary of the phase separation region. The structures of these dispersions under shear have been observed through small angle neutron scattering. It has been found that, above a critical shear rate, the necklaces connect to each other to form threadlike objects which align along the velocity. At higher shear these objects associate sideways to form three-dimensional flocs.</jats:p>
収録刊行物
-
- Journal of Rheology
-
Journal of Rheology 41 (3), 531-547, 1997-05-01
Society of Rheology
- Tweet
詳細情報 詳細情報について
-
- CRID
- 1362262946017309312
-
- DOI
- 10.1122/1.550874
-
- ISSN
- 15208516
- 01486055
-
- データソース種別
-
- Crossref