Ultrasonic processing for dispersion of CNTs in suspension was performed using a Hielscher UP400S 24 kHz device, power capacity of 400 W,equipped with a Ø 22 mm cylindrical sonotrode. Output power was regulated by means of manual adjustment of wave amplitude within 25–100% of the device’s maximum capacity. Theactual power transmitted to the suspension was measured using a Hielscher PowMet230 digital ultrasound energy meter. All suspensions where sonicated at 50% of the maximum ultrasound wave amplitude corresponding to an energy input rate of 7700 J/min . Dispersant agent-assisted aqueous suspensions of CNTs were prepared in fume hood environment according to the following strategy : A predetermined dispersant agent mass was initially added to 1000 ml of tap water in 2000 ml capacity low-form Pyrex glass beakers and an opalescent solution indicating complete dissolution was achieved after 60 s of magnetic stirring. The sonotrode was subsequently fully immersed into the suspension, sonication was commenced and CNTs were gradually introduced into the sonicated liquid. To investigate the effect of surfactant concentration on dispersion quality and identify the optimal surfactant /CNT ratio required to avoid surfactant stagnation or saturation, suspensions with SDBS /CNT ratios of 0.5/1, 1/1 and 2/1 were prepared by varying the initial surfactant mass within 2.5, 5 and 10 g. For SDBS-assisted suspensions, two CNT loadings were used, 0.5 and 1 wt% CNTs. For viscocrete-assisted suspensions, the corresponding ratio was 1.5/1,while CNT loading varied between 0.4 and 1.6 wt%.