To understand the role of phosphate ester dispersant, we investigated rheology a BaTiO slurry. For model case, coarse-grain molecular dynamics (CGMD) simulation was performed with butyral polymer didodecyl hydrogen (DHP) in toluene/ethanol solvent. By systematically analyzing effect DHP from an atomic-scale first principle and all-atom MD to microscale CGMD simulation, how adsorption dispersant...

this study has been investigated, the effects of three different polar polyacrylamides (anionic, cationic, and nonionic) on asphaltene deposition in porous media. all experiments were carried out in various dead oil flow rates (0.2, 0.1 and 0.02 cc/min) and different polymer concentrations (500, 2500, 4000 ppm). the results indicated that asphaltene precipitation was affected by the presence of...

Thin fibers were spun from a colloidal solution of single-walled carbon nanotubes (SWNTs) using an electrophoretic method. Sodium dodecylbenzenesulfonate (NaDDBS) was chosen as a surfactant and showed good performance owing to its special chemical structure. The highest spinning velocity reached 0.5 mm s-1. The resulting SWNT fibers had a tensile strength of 400 MPa and a conductivity of 355 S ...

Low hydrocarbon concentrations stimulated the growth of Tetraselmis suecica, whereas higher concentrations (200 ppm) inhibited growth. The content of chlorophyll a in this microalga was affected in a similar way. Crude oil had the most marked effects. Dispersant SEAKLIN-101-NT and mixtures of oil and SEAKLIN-101-NT did not show selective toxicity for the microalga, although inhibitory effects c...

Abstract The application of chemical dispersants aims to stimulate microbial oil degradation by increasing the bioavailability compounds. Overall, nine microcosms were prepared (three for each treatment) using treated sediment with (i) dispersant ( d : 25 ppm), (ii) (500 and (iii) + (500: respectively. There are also three control containing only water without petroleum. Then, we analyzed bacte...

To investigate the synergistic effect of oleic acid modification and dispersant on dispersion stability wear resistance graphene in base oil. Modified was prepared by using as surface modifier T161 dispersant. The microstructure characterized SEM Raman. effects were investigated, optimal addition amount determined. At same time, optimum modified determined MMU–10 testing machine. And feasibilit...

With the continuous research and development of the low-toxic and high-efficiency oil spill dispersants (OSDs), there are an increasing number of evaluation methods for the effect of the OSDs. Currently, the majority of the OSDs effect evaluation is related with the testing of the emulsification in the laboratory, while the stability researches on the OSDs effect are still few. In this paper, t...

Involvement of polymer-associated water in the interaction of heparin with poly-L-arginine and poly-L-lysine was studied by i.r. spectroscopy of complexes suspended in a non-aqueous dispersant. Movement of i.r. absorption bands due to heparin-associated water to lower frequencies upon polymer interaction indicates that hydrogen-bonding accompanies complexation. We suggest that this bonding incl...

This study has been investigated, the effects of three different polar polyacrylamides (anionic, cationic, and nonionic) on asphaltene deposition in porous media. All experiments were carried out in various dead oil flow rates (0.2, 0.1 and 0.02 cc/min) and different polymer concentrations (500, 2500, 4000 ppm). The results indicated that asphaltene precipitation was affected by the presence of...

ABSTRACT Chemical dispersant formulations typically provide maximum oil dispersion in waters between 30–40 ppt (parts per thousand) salt content, which encompasses typical ocean salinity (~34 ppt). As a result, most laboratory studies of effectiveness (DE) are conducted at low to average salinity. Ocean can vary locally from below 20 during ice and snow melt, extremely high (over 100 ppt) freez...