当前位置: X-MOL 学术Dyes Pigments › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Photo-stability of a flavonoid dye in presence of aluminium ions
Dyes and Pigments ( IF 4.5 ) Pub Date : 2018-10-16 , DOI: 10.1016/j.dyepig.2018.10.021
Alexandre Villela , Monique S.A. van Vuuren , Hendra M. Willemen , Goverdina C.H. Derksen , Teris A. van Beek

The main colouring compounds of the dye plant weld (Reseda luteola L.) are the flavones luteolin (lut), lut-7-O-glucoside and lut-7,3ʹ-O-diglucoside. Alum (an aluminium salt)-premordanted wool dyed with weld leads to yellow colours that are of low resistance to light. The photo-stability of lut in aerated methanol–water 8:2 (v/v) solution upon irradiation with light above 300 nm was studied at different lut–Al3+ ratios. Experiments using extracts of weld to dye wool premordanted with increasing quantities of aluminium salts were also carried out. The photo-stability of lut in the polar protic solvent and the photo-resistance (light-fastness) of the colour of weld-dyed wool decrease with increasing concentrations of aluminium ions. Thus, the lower the [Al3+] used for mordanting the wool, the more light-fast its colour. Lowering the [Al3+] appears to have no negative influence on the wash-fastness of the colour. As the gain in light-fastness by the use of low [Al3+] to premordant the wool is not extensive, however, this does not seem to be a way to meet today's requirement of light-fastness of the colours of dyed textiles by itself. Nevertheless, it may be part of a bigger strategy to address the need for increased light-fastness of the colour of wool dyed with weld. Implementation of this approach by dyers is expected to clarify whether it results in benefits for textile dyeing practice.



中文翻译:

类黄酮染料在铝离子存在下的光稳定性

染料植物焊缝(Reseda luteola L.)的主要着色化合物是黄酮木犀草素(lut),lut -7- O-葡萄糖苷和lut -7,3ʹ- O- diglucoside。用焊缝染色的明矾(一种铝盐)媒染的羊毛会导致黄色,其耐光性低。研究了在不同的lut -Al 3+比率下,用300 nm以上的光照射后,充气的甲醇-水8:2(v / v)溶液中lut的光稳定性。还进行了使用焊缝提取物染色预染了越来越多铝盐的羊毛的实验。lut的光稳定性在极性质子溶剂中,随着铝离子浓度的增加,焊染羊毛的颜色的耐光性(耐光性)降低。因此,用于使羊毛变色的[Al 3+ ]越低,其颜色越耐光。降低[Al 3+ ]似乎对颜色的耐洗牢度没有负面影响。通过使用低[Al 3+]以预告羊毛不是广泛的,然而,这似乎并不是满足当今对染色纺织品本身的耐光性要求的一种方法。尽管如此,它可能是解决对焊缝染色羊毛的耐光牢度提高的更大策略的一部分。有望通过染色商实施这种方法来弄清它是否会为纺织染色实践带来好处。

更新日期:2018-10-16
down
wechat
bug