Wettability of quartz in presence of nonionic surfactants and short chain alcohols mixtures

Effect of anionic surfactant and short-chain alcohol mixtures on adsorption at quartz/water and water/air interfaces and the wettability of quartz

“…However, it is interesting that the average value of the c C equal to 29.95 mN/m is very close to the dispersion component of the quartz surface tension covered by monolayer film of water determined by Fowkes [17,42]. This value is somewhat higher than that of the average c C determined from the contact angles for aqueous solutions of nonionic surfactants mixtures with shortchain alcohols on quartz surfaces [29]. However, this value is lying in the range of c C determined here from the contact angle of different series of aqueous solutions of SDDS and SHS mixtures with methanol, ethanol, and propanol.…”

“…A positive slope of the c LV cos h À c LV curves at constant SDDS or SHS concentrations can suggest that alcohol adsorption is the most probable on a quartz surface covered by water film than on a bare quartz surface, as was suggested earlier [28,29]. Therefore, it seems that alcohol adsorption at the quartz-water interface is negative, but at quartz/water film-water it is positive.…”

“…All values of the adhesion work corresponding to the alcohol concentration at which it is present in solution in the monomeric form [34,[36][37][38][39][40] changed from that of the work of adhesion of water to that of alcohol to the quartz surface [29]. However, above the concentration at which alcohol aggregation occurs [34,[36][37][38][39][40], the work of adhesion calculated from Eq.…”

“…Studies of the quartz wettability by aqueous solutions of polar organic substances and anionic surfactants showed that there is a positive slope of the linear dependence between the adhesion and the surface tension of the solution, which suggests that, in relation to bare quartz surfaces their adsorption is negative, and these substances can be adsorbed rather at quartz/ water film-water interfaces [28,29]. It was also suggested that a liquid vapor film can be formed beyond a solution drop settled on the quartz surface, changing its surface tension.…”

Experimental approach towards the water contact angle value on the biomaterial alloy Ti6Al4V

“…The contact angle formed by a liquid drop on a solid is dependent on the properties of the uppermost molecular layers of the solid, consequently the presence of any coverage or adsorbed layer on the solid affects the shape of the settled drops on the solid. For this reason, measurements of contact angles of probe liquids on solids are successfully used to characterize surface treatments or adsorbed films on solids [1][2][3][4][5][6][7][8].…”