Coagulation and charging of latex particles in the presence of imogolite

► We investigated the coagulation-dispersion and electrophoretic mobility of three types of latex spheres in the presence of imogolite nano-tubes. ► The mechanisms of imogolite-induced coagulation are charge neutralization and sweep coagulation. ► Charge neutralization takes place around the isoelectric point, whereas sweep coagulation works at higher imogolite dosage. ► The magnitude of imogolite charge affects the efficiency of sweep coagulation. ► Charge neutralization is controlled by the imogolite dosage per the latex surface area.