Preparation of super-fine capsulated Disperse Blue dispersion based on phase separation technique

Capsulated super-fine Disperse Blue 60 was prepared by phase separation method with poly(St-MA) as wall material.The effects of preparation conditions on particle size and size distribution were investigated.The results demonstrated that amounts of poly(St-MA) and disperse dye,dropping speed of phase separation agent and dispersing time had great influence on the size of prepared disperse dye.The optimal preparation conditions: mass ratio of poly(St-MA) and disperse dye,1∶ 5;dropping speed of phase separation agent,7 mL/min;mass fraction of disperse,7.5%;and dispersing time,2.0 h.FT-IR study and change of wettability of disperse dye before and after encapsulation showed that the disperse dye was encapsulated by poly(St-MA).DLS showed that the prepared disperse dye has small particle size and narrow size distribution.