光催化条件下棉织物的蓝晒工艺印相

针对蓝晒工艺在太阳光下曝光过程中存在诸多不定性影响因素的问题,采用具有稳定条件的光催化反应仪作为新曝光方式,探讨了感光剂浓度、棉织物种类、灯管功率、曝光时间对蓝晒图像效果的影响,从而得出优化印相条件;借助扫描电子显微镜、万能试验拉伸机等对棉织物的形貌与性能进行表征。结果表明:面密度为180 g/m²的棉织物在600 W灯光下曝光30 min的蓝晒图像效果最佳,极大提高了成品效率;灯管功率与曝光时间成正比关系,是影响蓝晒图像效果的主要因素;优化印相条件下制得的素染织物(无图案)、印相织物(有图案)与原棉织物相比,质量增加率分别达到了7.26%、5.57%,拉伸断裂强力分别提升了66.89 、46.78 N;织物载体的性能随普鲁士蓝色素沉淀量的不同而有所改变。

Cyanotype process of cotton fabric under photocatalytic conditions

In order to identify the influencing factors affecting the process of cyanotype exposure, a photocatalytic reactor with stable conditions was experimented as a new exposure method. The influence of printing factors such as photosensitizer concentration, cotton fabric type, ultraviolet(UV) lamp power and exposure time on the image effect of cyanotype process was investigated, and the optimized printing conditions of the cyanotype process were obtained. The properties of cotton fabrics were characterized by the scanning electron microscope, universal tensile tester and others. The results show that cotton fabrics with an areal density of 180 g/m² has the best cyanotype image effect when exposed to 600 W UV light for 30 min, with much improved efficiency. The lamp power is proportional to the exposure time, and both are found to be the main factors affecting the quality of cyanotype image. Comparing to the raw cotton fabric, the mass of plain dyed fabric (without pattern) and that of the printed fabric (with pattern) under the optimized conditions were 7.26% and 5.57% respectively, and the tensile strength was increased by 66.89 and 46.78 N, respectively. It was concluded that the properties of fabric substrate change with the different amount of Prussian blue pigment precipitation.