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Micellization of sodium dodecyl sulfonate and Triton X-100 in polyacrylamide water solution studied by 1H NMR relaxation and two-dimensional nuclear overhauser enhancement spectroscopy.
- Source :
- Colloid & Polymer Science; Nov1999, Vol. 277 Issue 11, p1026-1032, 7p
- Publication Year :
- 1999
-
Abstract
- Micellization of Triton X-100 (TX-100) and sodium dodecyl sulfonate (SDSN) in the presence of partially hydrolyzed polyacrylamide (PAAM) was studied by <superscript>1</superscript>H NMR spin–spin and spin–lattice relaxation. Relaxation experiment results show that TX-100 behaves differently from SDSN in micellization in the presence of PAAM. PAAM causes a decrease in the critical micellar concentration of SDSN, while it has no influence on the critical micellar concentration of TX-100. The lack of cross peaks between protons of PAAM and those of TX-100 and SDSN in the 2D nuclear Overhauser enhancement spectroscopy (NOESY) spectra confirms self-aggregation of TX-100 and SDSN in the presence of PAAM. The identity of each of the corresponding interproton distances of TX-100 with and without the addition of PAAM further confirms the formation of normal TX-100 micelles in the presence of PAAM. Besides, the distances between protons on the hydrophilic and hydrophobic chains in TX-100 micelles, calculated from the 2D NOESY spectra, are remarkably shorter than those for an extended hydrophilic poly(oxyethylene) chain. This implies that the hydrophilic chain is curled upon micellization. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 0303402X
- Volume :
- 277
- Issue :
- 11
- Database :
- Complementary Index
- Journal :
- Colloid & Polymer Science
- Publication Type :
- Academic Journal
- Accession number :
- 49538614
- Full Text :
- https://doi.org/10.1007/s003960050486