Preparation And Performance Study Of Nanoscale Encapsulated Disperse Dye Dispersion

Disperse dye with high performance in hue, brilliant and color strength was the main colorants for polyester and acetate fiber. However, the traditional disperse dyes were easy to cause an uneven staining on textile for their large particle size and wide particle size distribution. Nanoscale disperse dye with narrow particle size distribution could solve these deficiencies, which would be the major development for polyester fiber colorants in the future.In this paper, Phase separation technique was applied to prepare the nanoscale encapsulated disperse dye which Poly(St-MA) was used as wall material, and further the effect of process conditions on particle size and its distribution was investigated. The results illustrated that molecular weight, amount of Poly(St-MA), amount of disperse dye, dropping speed of phase separation agent, dispersing time and dispersant had great influence on the particle size and its distribution of prepared disperse dye. The optimal process conditions were that the mass ratio of Poly(St-MA) to disperse dye was 1:5, dropping speed of phase separation agent was 7mL/min, dispersing time of 2h. The dispersion which prepared under these conditions had small particle size, narrow particle size distribution and excellent stability to metal salt and pH value. Infrared spectrum (FTIR), transmission electron microscope (TEM), thermogravimetric analysis (TGA) and contact angle demonstrated that Poly(St-MA) was successfully encapsulated onto the surface of disperse dye.At last, the nanoscale encapsulated disperse dye was formulated into disperse dye ink, and the effects of additives on its colloidal properties and printing properties was also investigated. The results showed that glycerol could be used to adjust the viscosity of the ink, and can also improve the stability and printing performance of ink. OP-10 could be applied to reduce the surface tension. A small amount of defoaming agent could increase the rate of breaking bubble and can also improve the printing performance. The optimal formulation of ink was that: nanoscale encapsulated disperse dye was 20%, glycerol was 27%, OP-10 was 1.1% and MF was 0.25%。...