涤纶喷墨印花织物的柠檬酸-β-环糊精预处理

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

采用β-环糊精和柠檬酸为原料合成柠檬酸-β-环糊精,将其用于涤纶织物颜料墨水喷墨印花预处理,改善喷墨印花的清晰度和颜色深度。FTIR谱图中1 736 cm-1附近酯键特征吸收峰表明合成产物柠檬酸-β-环糊精的形成。柠檬酸-β-环糊精处理后的涤纶织物喷墨印花清晰度由12.5%增加至70.0%,说明印花宽度更接近于设置宽度,渗化现象减弱。织物上印花色块的K/S值由3.6增至5.9,颜色深度增加。柠檬酸-β-环糊精处理后涤纶织物的润湿性和柔软度相比未处理织物略有下降。扫描电镜图进一步表明,涤纶纤维表面及纤维之间的空隙处覆盖着一层柠檬酸-β-环糊精薄膜,增加了纤维表面的粗糙度,降低了毛细管效应,提高了织物的防渗化性能。

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.