INTERACTIONS OF IONIC SURFACTANTS WITH GELATIN IN FLUID SOLUTIONS ANDTHE GEL STATE STUDIED BY FLUORESCENCE TECHNIQUES, POTENTIOMETRY, AND MEASUREMENTS OF VISCOSITY AND GEL STRENGTH
M. Henriquez et al., INTERACTIONS OF IONIC SURFACTANTS WITH GELATIN IN FLUID SOLUTIONS ANDTHE GEL STATE STUDIED BY FLUORESCENCE TECHNIQUES, POTENTIOMETRY, AND MEASUREMENTS OF VISCOSITY AND GEL STRENGTH, Colloid and polymer science, 271(10), 1993, pp. 960-966
The photobehavior of pyrene (fine structure of the monomeric fluoresce
nce band; excited state lifetimes; excimer/monomeric fluorescence inte
nsity ratios and excited state quenching rates by oxygen) in fluid sol
utions of gelatin and in the gel state, both in the absence and presen
ce of ionic surfactants, has been examined. Surfactants considered wer
e sodium dodecylsulfate and dodecyltrimethylammonium bromide. Potentio
metric measurements performed by using surfactant selective electrodes
allowed for the determination of the binding capacity of the surfacta
nts onto gelatin in the gel state. When complemented with viscosity an
d gel strength measurements, the results obtained allow for a discussi
on of the effects of the surfactant-gelatin interactions on microscopi
c properties of the solutions or gels and their relation with macrosco
pic properties.