Small-Angle Scattering Studies of Sodium Dodecyl Sulfate Interactions with Gelatin. 1

SANS studies of the effects of surfactant head group on aggregation properties in water/glycol and pure glycol systems

“…Therefore, it would appear that this H-P model has not yet been extensively tested for solvents with a different dielectric constant than water. The fitting parameters obtained for SDS and presented in Tables 1 and 3 can be compared to previous work [41,42] for SDS in water only. From Tables 1 and 3, for a solution at 10 wt% SDS in water (equivalent to 0.4 M), the following values were obtained: from the form factor: r 1 = 16 ± 2 Å and r 2 = 12 ± 2 Å; from the structure factor: Z = 31 ± 2, Debye length (r D = 1/κ) r D = 8.3 ± 1 Å and the apparent H-P S(Q) radius R H-P = 28 Å.…”

Microscopic structure of gelatin coacervates

“…Physically, S L (0) is related to the cross-link density and longitudinal osmotic modulus. Although Okano et al [35] and others [36] have found full agreement with the O-Z behavior; experiments carried out in the semi-dilute regime of polymer solutions have shown deviations from the Ornstein-Zernike function. An "excess scattering" has been reported at low wave numbers from polymeric solutions [37][38].…”

Physicochemistry of hexadecylammonium bromide and its methyl and ethanolic head group analogues in buffered aqueous and gelatin solution

“…Gelatin also forms coacervates with oppositely charged surfactants, and to this end, studies have been mainly made with anionic surfactants. [21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36][37][38][39][40] Interaction of gelatin with polyanions like sodium polystyrenesulfonate (NaPSS) or sodium poly(2-acrylamido-2-methylpropanesulfonate) 41 or mixed micelles of SDS and a sugar-based non-ionic surfactant 42 have been found to depend on the critical mole fraction, charge density, and chain length of the surfactants. But reports on the interaction of gelatin with non-ionic surfactants 43 or with cationic surfactants of varied types have been strikingly limited.…”