Synthesis and application of CTR-β-CD for inkjet printed fabric pretreatment

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 1 736 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.