Study of the complex formation between sodium dodecyl sulfate and chitosan

Complexes of oppositely charged polyelectrolytes and surfactants – recent developments in the field of biologically derived polyelectrolytes

“…Quite a bit of effort has been dedicated to complexes formed by chitosan with sodium dodecyl sulphate (SDS). 38,42,[158][159][160][161][162][163][164] It was shown that SDS and chitosan form insoluble complexes well below the cmc of the surfactant and in a high polyelectrolyte excess, indicating a strong cooperative behavior ascribed to the hydrophobic interactions among the bound surfactant molecules. 38,160 In the work done by our group we also found that chitosans with different molecular weights and different degrees of acetylation (DA) (from ca.…”

“…With respect to cellulose based systems, studies of interfacial properties of chitosan surfactant mixtures are more limited 161,162,[167][168][169][170][171][172][173] and were recently reviewied. 171 In the literature contradicting results on the surface activity of chitosan solutions can be found: while some authors state that chitosan itself shows no surface activity%, 161,168,169,174 or report even an increase in surface tension up to 84 mN m À1 for 1% of 1.88 MDa chitosan in a 0.1 M acetic acid solution at 25 C, 174 on the contrary, other authors report a strong decrease in surface tension also for dilute chitosan solutions (C p ca.…”

Co-assembly in chitosan–surfactant mixtures: thermodynamics, structures, interfacial properties and applications

“…Chitosan strongly interacts with sulfated surfactants, forming waterinsoluble and structured complexes over a wide range of concentrations and mixing ratios [67,69,76,101,102] (see Fig. 3).…”

“…Particular effort was put in studying mixtures of chitosan and sodium dodecyl sulfate (SDS) [38,[67][68][69][70] with the latter being a well known model anionic surfactant. Several studies also deal with chitosan/fatty acids or ethoxylated fatty acids mixtures [71][72][73][74].…”

Influence of the polyethyleneimine grafting on the adsorption capacity of chitosan beads for Reactive Black 5 from aqueous solutions

“…CS hydrogel beads formed by sodium dodecyl sulphate (SDS) gelation (CSB) exhibit better mechanical and acid stability than CS beads formed by alkali gelation [10], and CSB formation involves a simple process of dropwise addition of CS in acetic acid solution to SDS solution. This gelation method mainly involves multiple interactions such as electrostatic, ion-dipole and hydrophobic interactions between CS and SDS molecules [11][12][13].…”