苯并三唑结构紫外线吸收剂对蚕丝耐光稳定性能的影响

摘要

To enhance the photostability, silk fabric was treated with the benzotriazole structure ultraviolet absorber UV⁃FAST W ( UVFW ) . The photoyellowing process of silk was measured and analyzed during the ultraviolet irradiation. Effects of concentration of UVFW on photoyellowing and phototendering of silk fabric were analyzed. Then, the wet fastness of silk treated with UVFW was discussed. At last, the UVFW was used to finish the silk dyed with acid dye and its impact on the color index and light fastness was discussed. The results show that the photostability of silk treated with 1% ( o. w. f) UVFW was improved obviously, but the photostability was no longer improved obviously when the UVFW concentration continued to increase, and the whiteness of treated silk will be reduced with the increasing of UVFW concentration. Photostability of silk treated with UVFW was reduced significantly after washing, so the wet fastness needs to be further improved. The color index and light fastness of dyed silk will be affected by UVFW, but the effects were different and related to dye structure.%为提升蚕丝织物的耐光稳定性能，采用苯并三唑结构紫外线吸收剂UV⁃FAST W（简称UVFW）对其进行处理，并将处理蚕丝进行紫外光照实验，测试了蚕丝的光照黄变历程，分析了UVFW用量对蚕丝光黄变与光脆损的影响，探讨了UVFW处理蚕丝的湿牢度问题，同时还研究了UVFW对染色蚕丝颜色指标与光色牢度的影响。结果表明：经1％（ o． w． f） UVFW处理的蚕丝光稳定性能得到较大程度的提升，继续增加UVFW用量，蚕丝的光稳定性能提升不明显，且UVFW用量增加会降低蚕丝的初始白度；水洗后蚕丝光稳定性能明显下降，其湿处理牢度需进一步提升；UVFW对染色蚕丝的颜色指标与光色牢度均产生影响，但影响程度与染料有关。