中文摘要：

自制了两种适用于棉的反应性紫外线吸收剂UV-A1和UV-A2,通过正交试验对这两种反应性紫外线吸收剂在棉织物上的应用工艺进行了优化,分别获得最佳工艺。UV-A1的最佳工艺为：温度90℃,pH 10,整理时间90min,硫酸钠用量为60g/L;UV-A2的最佳工艺为：温度90℃,pH 10,整理时间90min,硫酸钠用量为40g/L。在最佳工艺条件下,UV-A1和UV-A2对棉织物的上染率分别为5.40%和47.00%,固着率分别为4.04%和39.90%。UV-A1和UV-A2所含磺酸基数量的差异是造成上染率显著差异的主要原因,含有三个磺酸基的UV-A1解离后所带负电荷大于含有两个磺酸基的UV-A1,因此与水中呈负电性的棉织物存在更大的电荷斥力,造成其上染率严重偏低。对UV-A2整理后的棉织物经过20次洗涤后,UV-A2整理的棉织物UPF值仍在30以上,说明了其具有较好的湿态耐久性,能够达到持久的紫外线吸收效果。

英文摘要：

Our lab made two reactive UV absorbers, UV-A1 and UV-A2 which are applicable to cotton fabrics. The orthogonal test was used to optimize the application process of the two kinds of reactive UV absorbers in cotton fabrics, and the optimum process conditions were obtained： for reactive UV absorber UV-A1, processing temperature 90 ℃ , pH value 10, time 90min, the amount of sodium sulfate 60 g/L; for reactive UV absorber UV-A2, processing temperature 90 ℃ , pH value 10, time 90min, the amount of sodium sulfate 40 g/L. Under the optimum conditions, the dye uptake rates of UV-A1 and UV-A2 were 5. 40% and 47. 0%; the fixation rates were 4. 0 4 % and 39. 9%, respectively. The significant differences in the rate of dye uptake between UV-A1 and UV-A2 are due to different amount of sulfonic acid groups. After dissociation of UV-A1 containing three sulfonic acid groups, the negative charge was larger than UV-A1 containing two sulfonic acid groups. Thus, greater charge repulsion existed with the electronegative cotton fabrics in water. This leads to low dye-uptake rate. After cotton fabrics treated by UV-A2 were washed for 20 times,the UPF value of the cotton fabrics treated by UV-A2 was still above 30. This indicates the cotton fabrics treated with UV-A2 have good wet durability and can achieve a long- lasting ultraviolet absorption effect.