On the Influence of Surfactants on the Adsorption of Polysaccharide-Based Polymers on Cotton Studied by Means of Fluorescence Spectroscopy

Abstract

In this study, we examined the influence of surfactants on the adsorption of polymers on cotton fibers. The extent of polymer adsorption on cotton was determined directly by means of fluorescence spectroscopy using fluorescently labeled polymers. The investigation of polymer adsorption in the presence of different types of surfactants and for a large range of differently structured polymers allows us to obtain a rather general picture of this important issue. Systematic relationships between the presence of surfactant and the type of polymer can be deduced but cannot be cast in simple terms such as electrostatic interaction but instead depend on the detailed interaction between the surfactant and polymer both in solution and adsorbed on the cotton surface. A particularly complex situation arises for the case of oppositely charged surfactant and polymer because of the possibility of precipitate formation. The study of such complex systems not only is of scientific interest but also is of great commercial interest because both polymers and surfactants are parts of detergent formulations and cotton is one of the most abundantly used materials for fabrics.

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

“…1). 5,[70][71][72][73][74] It has been found that these complexes can be dissolved in an excess of polyelectrolyte or surfactant and their net charge has been reported to change sign in the case of JR 400-SDS, JR 400-SDBS and CMC-CTAB 14,44,80 but not in the case of CMC-DTAB, 80 for which no explanation has been advanced, yet. For mixtures of other cationic surfactants of the 1-alkyl-3-methylimidazolium bromide and N-alkyl-N-methylpyrrolidinium bromide type with CMC it has been shown that the earlier the region of the phase separation is reached the longer is the alkyl chain of the surfactant.…”

“…106 Fluorescence methods can yield useful information about polymeric systems. 107 Polysaccharide based polymers are well suited for the use of uorescence methods, since they are easy to label 108,109 and a number of studies has been performed with labeled cellulose derivatives 14,61,[110][111][112] and also with non-covalently attached uorescence labels. 102,113 Most noticeably the formation of hydrophobic surfactant aggregates along the polyelectrolyte backbone and conformational changes of hydrophobically modied cationic cellulose could be shown by the change of the uorescence signal.…”

“…Polymer-surfactant systems are interesting as they are employed in a variety of applications such as detergency, 5 for drug delivery, 6,7 as rheological modiers, 8,9 as delivery systems, 10,11 in paints 12 or other formulations. In detergency a relevant question is oen their deposition/redeposition onto fabric bres, a topic that has been studied to quite an extent 13,14 but shall not be covered here. Accordingly, such mixtures have been investigated for some time, with the main emphasis on synthetic polyelectrolytes such as anionic poly(acrylic acid) (PAA), poly(methacrylic acid) (PMAA), poly(styrene sulfonate) (PSS), or cationic poly(diallyldimethylammonium chloride) (PDADMAC), where the charges are very closely spaced, i.e., the distance between the charges is much less than the Bjerrum length (eqn (1); with 3 r : dielectric constant, 3 0 : permittivity constant of vacuum, k: Boltzmann constant and T: temperature), which gives the distance at which the electrostatic energy of two elementary charges becomes equal to kT, and accordingly counterion condensation is expected to be relevant here.…”

Structure and dynamics of polyelectrolyte surfactant mixtures under conditions of surfactant excess

“…with 5-[(4,6-dichlorotriazin-2-yl)amino]fluorescein (DTAF, Sigma-Aldrich) according to the procedure described by de Belder and Granath 44 and applied previously to JR 400, 30,[45][46][47] while the hydrophobic dye Atto647 was used to specifically monitor the dynamics of the surfactant aggregates. As a reference, the diffusion of the surfactant aggregates was also investigated using another hydrophobic dye, nile red (Sigma-Aldrich).…”

A Novel Surfactant Sensitized Fluorescent Sensor for Co(II) Based on Nitrogen Doped Carbon Quantum Dots

“…Sensitizers, mainly surfactants, play an essential role in the dispersion of materials and controlling particle morphology. It has been reported that surfactant as a sensitizer can enhance chemiluminescence [23]. The study of fluorescence found that the sensitizing system can maintain a long fluorescence lifetime and strong luminescence intensity [24].…”