Abstract
The presence and effect of water on calcium carbonate nanoparticles used in engine additives, stabilized with a sulfonate surfactant, is investigated using small-angle neutron scattering, dynamic light scattering, Fourier transform infrared spectroscopy, and rheometry. These techniques provide complementary data that suggests the formation of a layer of water around the core of the particles ensuring continued colloidal stability yet increasing the dispersion viscosity. Through the use of small-angle neutron scattering, the dimensions of this layer have been quantified to effectively one or two water molecules in thickness. The lack of a significant electrostatic repulsion is evidence that the water layer is insufficient to cause major dissociation of surface ions.
Original language | English |
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Journal | Langmuir |
Volume | 24 |
Issue number | 8 |
Pages (from-to) | 3807-3813 |
Number of pages | 7 |
ISSN | 0743-7463 |
DOIs | |
Publication status | Published - 2008 |
Externally published | Yes |