✦ LIBER ✦
7Li Double Quantum Filtered NMR and Multinuclear Relaxation Rates of Clay Suspensions: The Effect of Clay Concentration and Nonionic Surfactants
✍ Scribed by J. Grandjean; J.-L. Robert
- Publisher
- Elsevier Science
- Year
- 1999
- Tongue
- English
- Weight
- 64 KB
- Volume
- 138
- Category
- Article
- ISSN
- 1090-7807
No coin nor oath required. For personal study only.
✦ Synopsis
Li double quantum NMR spectra were used to investigate ordering process of synthetic Li ؉ -saponites dispersed in water. Synthetic clays suspended in aqueous solutions of poly(ethylene glycol) monoalkyl ethers were also studied by 7 Li, 23 Na, and 13 C NMR techniques. The strongest surfactant-Li ؉ -saponite interaction occurs with the lowest charged clay. Laponite interacts more strongly with organic molecules than does a similarly charged saponite. The number of oxyethylene units rather than the chain length seems to govern the solid-surfactant interaction.