Carbon Nanotubes Microenvironment in Ionic Surfactant Water Solutions

Abstract

The processes of aggregation of anionic (SDS) and cationic (CTAB) molecules into supramolecular formations and the effect of carbon nanotubes on the processes were investigated by conductometry and tensiometry methods. Concentration dependences of the specific electrical conductivity and surface tension of aqueous SDS and CTAB dispersions and suspensions of carbon nanotubes of the carbon nanomaterial Taunit in these dispersions were obtained. A conclusion on the change in the conformation of CTAB micelles in the presence of carbon nanotubes was drawn. A significant increase in the packing density of CTAB molecules and their ordering in the monomolecular layer at the water-air interface in the presence of carbon nanotubes was shown. In particular, this makes it possible to control the properties of the surfactant surface layer by means of carbon nanotubes.

Use of Natural Biopolymers to Create Nanocomposite Materials

“…To improve the mechanical, electrical, thermal, or structural properties of such hydrogels carbon nanotubes can be embedded in its matrix. The usual method of disaggregating carbon nanotubes using surfactants [20][21][22][23] for hydrogels is not suitable, because surfactants interacting with the hydrogel matrix, in addition to the toxic effect, also lead to a deterioration of its viscoelastic properties [9]. Dispersing carbon nanotubes with liquid hydrogel at heightened temperatures, we also did not achieve the final uniformity of their distribution [14].…”

The scheme of dosing additives to fuel oil and evaluation of the effectiveness of its implementation at the enterprises of the fuel and energy complex

“…Currently, the most used and common way to combat sediment, improve the quality of liquid fuels is the use of various additives. The use of additives depends little on the design and mode of operation of the boiler; their input into fuel oil can be organized outside the power plant [5][6][7][8].…”

Modified method of conductometric data analysis to calculate the conductivity of surfactant ions

“…Numerical calculations are performed using the example of one of the most studied anionic surfactants -sodium dodecyl sulfate (SDS). The choice of this surfactant was dictated by our experience in studying SDS solutions [5,6] and phenomena occurring on the surfaces of carbon nanotubes dispersed in these solutions [7][8][9].…”