Abstract:

The citric acid-β-cyclodextrin was synthesized from β-cyclodextrin and citric acid and applied on the pigment inkjet printed polyester fabric as pretreatment to improve the definition and color depth. The ester linkage absorption peak at 1736 cm-1 confirmed the formation of citric acid-β-cyclodextrin. The definition was increased from 12.5 % to 70.0%. It is indicated that the printed width was more close to the set width, the penetration was reduced. The enhanced K/S value of the printed color lump from 3.6 to 5.9 illustrated the improved color depth. The wettability and softness of the citric acid-β-cyclodextrin pretreated fabric was a little decreased when compared to the untreated one. SEM images clarified that the polyester fiber surface and the spaces between the adjacent fibers were covered with the film of citric acid-β-cyclodextrin, improving the roughness and reducing the capillary effect.