Micelle-polymer complexes as studied by the ESR spin probe technique

Abstract

Complexes between sodium dodecyl sulfate micelles and the water-soluble polymers poly(N-vinylpyrrolidone), poly(ethylene oxide) and a copolymer of poly(vinyl alcohol) and poly(vinyl acetate) have been studied in aqueous solution by the electron spin resonance (ESR) technique using di-tert-butyl nitroxide as a spin probe. The effective rotational correlation times reveal lowering of the critical micelle concentration and decreased headgroup packing in the micelle upon interaction with the polymers.

Physicochemical Investigations on the Interaction of Surfactants and Salts with Polyvinylpyrrolidone in Aqueous Medium

“…Weak interactions of cationic surfactants with hydrophobic polymers, viz. polypropylene oxide, polyvinyl methyl ether, and hydroxypropyl cellulose, have been reported (19)(20)(21). Also, there is a recent report that cetylpyridinium chloride can form a second micelle along with the normal one by interacting with high-molecular-weight PVP and polyethylene glycol (PEG) (18).…”

“…The iodide ion can specifically bind to the protein serum albumin under the isoelectric condition. Ion binding to biopolymers results in the reorganization of the functional groups constituting the structure of the macromolecules (18)(19)(20)(21)(22)(23)(24)(25). Neutral carbohydrate molecules (glucose, sucrose, maltose, amylose, etc.)…”

Studies on bovine serum albumin–sodium dodecyl sulfate complexes using pyrene fluorescence probe and 5-doxylstearic acid spin probe

“…In contrast, as a basic study, the physical property or the nature of the complex has been studied especially for the system of bovine serum albumin (BSA) and sodium dodecyl sulfate (SDS) by means of fluorescence spectroscopy [2][3][4][5][6][7], light scattering [7][8][9][10][11][12][13], NMR spectroscopy [5,7,14,15], electron spin resonance spectroscopy [6,16,17], and electric conductivity measurements [18][19][20][21].…”

Solution Properties of a Hydrophobically Associating Cellulosic Polymer

“…is obtained at a concentration approximately equiv alent to the expected cmc of the free surfactant (8.2 χ 10~3 mol dm" 3 ). However, the cmc of SDS in the presence of polymer may be changed signif icantly (22,23). Numerical analysis (9) of the ESR spectra given in Figure 9 indicates that, in the presence of 0.2% HMHEC, surfactant-hydrophobe interactions occur at an SDS concentration of approximately 2 χ 10~3 mol dm" 3 , a factor of four lower than the expected cmc.…”