蒽醌染料的日晒牢度与其结构的构效关系研究进展

本文综述了蒽醌染料的日晒牢度与其结构的构效关系研究进展。影响蒽醌染料日晒牢度的因素有很多,主要取决于染料的分子结构,与分子中取代基的种类和位置、分子的偶极距等有关。     

高日晒活性染料的研究进展

纺织品染色牢度已成为重要的质量问题,耐日晒牢度是纺织品的一个重要的性能指标。文章回顾了不同染料母体结构的发展历史,分析了活性染料结构、染色浓度、染料助剂对棉织物耐光色牢度的影响,并从染料及活性基的选择、染后整理等方面提出了改进措施。     

活性黑KN-B的日晒牢度与染色工艺关系的研究

本文对活性黑KN-B(C.I.Reactive　Black 5)染纯棉织物的染料浓度,固色率和染色后处理条件与日晒牢度的关系,以及三原色拼色时对日晒牢度的影响做了探讨,同时对涤/棉织物两浴法染色的活性黑KN-B与分散蓝HBGL对其日晒牢度的影响做了研究。结果表明:活性黑KN-B染纯棉织物,其日晒牢度随染料浓度和固色率的增加而提高,且固色率为70％以上时,日晒牢度大幅度提高。染色后处理,碱剂与皂煮对日晒牢度亦有一定的影响。使用活性黑KN-B,活性红M-3BE,活性黄M-3RE拼色对织物染色时,在KN-B的浓度为1％以下,其日晒牢度随浓度的增加而下降,在KN-B的浓度超过1％时其日晒牢度随浓度的增加而升高;日晒牢度随活性红M-3BE与活性黄M-3RE的浓度的增加而增大。采用分散/活性二浴法染涤/棉织物,其日晒牢度随KN-B浓度的增加,先降低后升高,在染料浓度大于1％时,日晒牢度几乎不在变化;但其日晒牢度随分散蓝HBGL的浓度的增加而增大。     

偶氮染料结构与日晒牢度关系研究

本文介绍了近年来国内外对于偶氮染料光致褪色的研究进展,综述了偶氮染料光褪色与偶氮键断裂机理。利用Hammett方程,反映出取代基效应与染料褪色速率间的定量关系,并将Hammett方程引入分散、酸性偶氮染料日晒牢度的分析中,很好的阐释了取代基团吸、供电子效应对染料在不同纤维上日晒牢度的影响,并提出了获得优异日晒牢度染料的合成和应用方法。     

以2-氨基对苯二甲酸为重氮组分的酸性染料的染色性能研究

本文以2-氨基对苯二甲酸为重氮组分合成了三支酸性染料:两支偶氮染料和一支蒽醌染料,并对它们的染色性能进行了研究.结果表明这三支酸性染料用于羊毛织物染色时,具有较高湿处理牢度及较高的日晒牢度.红色及黄色酸性染料用于羊毛织物染色后媒法铬化处理,各种湿处理牢度及日晒牢度有所提高.     

活性黑KN—B的日晒牢度与染色工艺关系的研究

本文对活性黑KN－B（C.I.Reactive Black 5)染纯棉织物的染料浓度，固色率和染色后处理条件与日晒牢度的关系，以及三原色拼色时对日晒牢度的影响做了探讨，同时对涤／棉织物两浴法染2色的活性黑KN－B与分散蓝HBGL对其日晒牢度的影响做了研究，结果表明：活性黑KN－B染纯棉织物，其日晒牢度随染料浓度和固色率的增加而提高，且固色率为70％以上时，日晒牢度大幅度提高，染色后处理，碱剂与皂煮对日晒牢度亦有一定的影响，使用活性黑KN－B，活性红M－3BE，活性黄M－3RE拼色对织物染色时，在KN－B的浓度为1％以上，其日晒牢度随浓度的增加而下降，在KN－B的浓度超过1％时其日晒牢度随学的增加而升高，日本牢度随活性红M－3BE与活性黄M－3RE的逍度的增加而增大，采用分散／活性二浴法染涤／棉织物，其日晒牢度随KN－B浓度的增加，先降低后升高，在染料浓度大于1％时，日晒牢度几乎不在变化；但其日晒牢度随分散蓝HBGL的浓度的增加而增大。     

芳纶1313的超高温高压染色研究

本文采用超高温高压法对芳纶1313进行染色,分别研究了染料种类和染色温度对芳纶1313纱线染色日晒牢度、K/S值及染透性等方面影响,结果发现,分散染料所染纱线的各项染色性能都比阳离子染料和还原染料好;随染色温度升高,日晒牢度、纤维表面颜色深度及其纤维染透性都得到了不同程度的改善,而纱线的断裂强度随染色温度的升高变化不大。     

纱线活性染料染灰色日晒牢度探讨

针对纱线活性染料染灰色日晒牢度差问题,结合拼色用量及染色成本,给出合理染料组合,使日晒牢度得以提高,质量得到保证。     

浅谈活性染料结构与性能的关系

本文介绍了活性染料的分类,通过实例阐述了活性染料结构对染料各项性能的影响。包括对色光、日晒牢度、固色率、溶解度、可拔性、纤维亲和力以及湿牢度的影响。     

酸性媒介染料在毛纺行业中的应用及前途预测

一、酸性媒介染料的特点及主要用途众所周知,酸性媒介染料的匀染性好,洗呢、煮呢、蒸呢等后整理过程中变色少,染色坚牢度高(浅色日晒牢度除外),为其他各类染料所不及。其缺点是色泽较暗、染浅色时日晒牢度低,染色时间长,以及有含铬废水排     

The effect of polycation on the light fastness of CI Acid Red 249

Cationic compounds are frequently used in direct dyeing processes and in ink-jet printing as dyefixing agents. In some cases, however, they can reduce the light fastness of dyes used. This report deals with the effect of a polycationic compound, Polyfix 601, on the light fastness of CI Acid Red 249, an anionic 2-phenylazo-1-naphthol dye, in aqueous solutions and in PVA films. As a comparison, the much smaller ammonium cation was used, which had no observable effect on hue or dye light fastness. However, some changes to the dye's physical properties were observed. The effect of the polycation is explained as a consequence of dye aggregation, facilitated by presence of polycation. Self-sensitised singlet oxygen seemed to play no part in dye photofading, but other oxygen species could participate in the process.     

The Anomalous Fading of Some Fluorescent Dyes and Brighteners on Hydrophilic Fibres

The fastness to light of a number of fluorescent yellow dyes and fluorescent brightening agents (FBA) on several fibres at different concentrations has been assessed both visually and by colour-difference measurements. One acid dye on wool, six FBA on wool and two FBA on cotton showed anomalous fading (i.e. the light fastness decreased with increasing concentration). Results of extraction experiments showed that this could be accounted for by the formation of coloured decomposition products from the dye or FBA and, with wool, from the fibre also. With FBA on wool and cotton there appears to be an optimum concentration above which both the fastness to light and the whiteness fall.     

Metal mordanting in dyeing with natural colourants

Metal mordanting, or the application of metal salts, is a common method of improving the light fastness in dyeing with natural colourants. This review presents the results from a survey of the literature on metal mordanting to assess what levels of correlation exist between mordant‐induced effects (changes in colour and colour depth) and the changes in light fastness, what is known about the mechanisms of mordant‐induced improvements of light fastness, and how the salt levels used in coloration processes compare with the limits on metal levels in wastewater and on the dyed substrates. No strong interrelationships are found between the mordant‐induced effects and light fastness improvements. Knowledge about mechanisms of mordant effect on light fastness appears, in large part, to be derived from empirical correlations. However, as light fastness is affected by a multitude of factors, the correlations do not always hold true. It is found that residual metal contents in spent dye/mordanting liquors are generally not reported. However, with rough calculations, it is estimated that, with even the lowest reported salt concentrations, the metal contents in spent liquors exceed environmental release limits. The metal contents on dyed substrates are also not generally reported, but similar estimations show that the contents of heavy metal on dyed substrates (when copper and chromium salts are used as mordants) also exceed limits. On the basis of these observations, the authors make suggestions for elements to be included in investigations on furthering the use of natural colourants in textile dyeing.     

Fading characteristics of a disperse dye on cellulose triacetate, polyester and nylon under monochromatic light radiation

Light fastness of CI Disperse Blue 165 dye on cellulose triacetate, polyester and nylon fabric substrates exposed to monochromatic light was examined on a radiant energy basis. The action spectra indicated a strong effect on the substrate-fading characteristics: nylon exhibited poorer light fastness in the visible and ultraviolet light range than polyester and cellulose triacetate. Two specific fading peaks were found for the nylon substrate, which were different to those found for the polyester and cellulose substrates. It was shown that polyester exhibited the best light fastness properties overall. The colour changes in the fading process suggested that the fading products of the dye on nylon (where reduction occurred) were different from those on the polyester and cellulose triacetate substrates (where oxidation occurred).     

Study of the Influence of Gemini Cationic Surfactants on the Dyeing and Fastness Properties of Polyester Fabrics Using Naphthalimide Dyes

In this paper, the dyeing and fastness properties of three monoazo naphthalimide dyes including different imide groups (dye 1: ethyl amine, dye 2: ethyl glycinate and dye 3: glycine) on a polyester fabric were investigated in the presence of two gemini cationic surfactants (symbolized as 12‐4‐12 or 14‐4‐14) and a conventional single chain surfactant, dodecyltrimethylammonium bromide (DTAB). The color strength (K/S) of naphthalimide dyes on polyester fabric was measured through the reflectance spectrophotometric method, and the values obtained in the presence of different cationic surfactants increased in the order of dye 3 < dye 2 < dye 1. Although the K/S values indicated that the gemini cationic surfactants had almost no effect on the dyeing behavior of dye 1, but they were effective in dyeing ability of dye 2 and dye 3. The data for dye 2 demonstrated that build up of polyester fabrics in the presence of gemini surfactants are more than the conventional cationic surfactant, and also K/S values of dye 3 on polyester fabrics were in the order: DTAB > 12‐4‐12 > 14‐4‐14. It was found that the washing and rubbing fastness properties improved with increasing the concentration of surfactants. In addition, the sublimation fastness of dye 3 was more than the other dyes owing to the presence of a polar group in its chemical structure, and the light fastness of naphthalimide dyes on polyester fabrics was generally moderate.     

影响活性染料染色织物的日晒牢度因素分析

本文简要阐述了染料光化学褪色的基本原理,由此分析了影响活性染料染色织物日晒牢度各因素并提出了相应的改进措施,对实际生产具有一定的指导意义。     

Role of quaternary ammonium salts in improving the fastness properties of anionic dyes on cellulose fibres

The object of this study was to review the developments taking place during 1990–2005 regarding the use of quaternary ammonium salts as dye fixing agents for improving the fastness properties of anionic dyes on cellulose fibres. As far as fastness properties are concerned, this review is restricted only to fastness to light, washing and water treatments.