【摘要】 为实现阳离子可染改性涤纶（ECDP）纤维的抗紫外效果及高效染色，研究钛白粉质量分数对染色性能影响。将聚对苯二甲酸乙二醇酯与TiO₂复合（PET/TiO₂）作为功能母粒与ECDP切片共混熔融纺丝，制得超消光ECDP纤维，运用扫描电镜、单纱强力仪、紫外线透射率分析仪分析纤维性能，以亚甲基蓝染料染色结合热力学原理，确定染色最佳工艺。结果表明：纤维中钛白粉质量分数从0升至4.3%,其断裂强度下降但仍满足加工要求；当改性钛白粉质量分数达2.2%时，其紫外防护系数（UPF值）达248、长波紫外线（UVA）小于5%,满足防紫外产品要求；纤维80℃可染，90℃以下染色热及染色熵为正，95℃以上为负，故在90～95℃染色最佳。钛白粉质量分数增加会使纤维表层的光线反射能力增强，导致染色后的颜色变浅。该研究为ECDP纤维的绿色染整与功能化提供理论及技术支撑。更多还原

【Abstract】 In order to achieve the anti-ultraviolet effect and efficient dyeing of cationic dyeable modified polyester（ECDP） fibers, the effect of titanium dioxide mass fraction on dyeing performance was investigated. The PET/TiO₂ functional masterbatch was blended with ECDP slices and melt-spun to produce super matte ECDP fibers, and the fiber properties were analyzed by scanning electron microscope（SEM）, single-yarn tensile strength meter and ultraviolet transmittance analyzer, and the optimal dyeing process was determined by dyeing with methylene blue dye combined with thermodynamic principle. The results show that: the mass fraction of titanium dioxide in the fiber from 0 to 4.3%, its breaking strength decreases but still meets the processing requirements; when the mass fraction of modified titanium dioxide reaches 2.2%, its ultraviolet protection factor（UPF value） reaches 248, the long-wave ultraviolet（UVA） is less than 5%, to meet the requirements of ultraviolet products; and the fiber can be dyed at 80 ℃, the heat of dyeing and the dyeing entropy are positive at 90 ℃, and is negative at 95 ℃, so dyeing at 90-95 ℃ is the best. At the same time, an increase in the mass fraction of titanium dioxide will enhance the light reflection ability of the fiber surface layer, resulting in lighter color after dyeing. This study provides theoretical and technical support for the green dyeing and functionalization of ECDP fibers.更多还原