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Zeta potential varying with concentration of the SHMP dispersant in 0.005 wt % TiO2 solution after being dispersed via SCCO2 under conditions of 35 °C, 1200 psi, and a saturation time of 30 min, in which the residual CO2 in the TiO2 dispersion solution was removed with a ultrasonic bath for 10 min after depressurizing.
