Study on droplets formation process of additives/capsulated super-fine disperse dye

The capsulated super-fine disperse dye was prepared by phase separation technique through encapsulating Disperse Blue 60 with styrene-maleic acid copolymer as the wall material.The effects of glycerin and Tween 80 mass fraction on the colloidal properties of super-fine disperse dye were investigated,and the factors affecting droplets formation process based on the chosen and suitable viscosity,surface tension and stability were discussed.The FT-IR and TEM results showed that capsulated super-fine disperse dye was prepared successfully.The study of colloidal properties indicated that the higher mass fraction of the capsulated super-fine disperse dye and glycerin,the greater viscosity of the system.Tween 80 could reduce the surface tension of the system.And all of the three factors affected the stability of the system.It was found by analyzing the droplets formation process that increasing the viscosity and reducing the surface tension,made the droplets break easing.In addition,decreasing surface tension could lead droplet′s maximum volume smaller.Viscosity might be the main factor affecting the formation and dropping of ″satellite droplets″.Especially,when the viscosity was lower,the ″satellite droplets″ were formed more easily,and more difficult to coincide with the lord droplets.