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首页> 外文期刊>Dyes and Pigments >The role of auxiliaries in the immersion dyeing of textile fibres: Part 9 practical aspects of the role of inorganic electrolytes in dyeing cellulosic fibres with pure reactive dyes
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The role of auxiliaries in the immersion dyeing of textile fibres: Part 9 practical aspects of the role of inorganic electrolytes in dyeing cellulosic fibres with pure reactive dyes

机译：助剂在纺织纤维浸染中的作用：第9部分实际方面的无机电解质在染色纤维素纤维中的作用，纯活性染料

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摘要

The colour strength, as well as the extents of both exhaustion and fixation, achieved for three pure reactive dyes on cotton were promoted by the addition of 50 gl(-1) NaCl at each of seven liquor ratios employed (1:50, 1:20, 1:10, 1:6, 1:3, 1:2 and 1:1.5). The depth of shade of dyeings obtained in the absence of added electrolyte using al:1.5 liquor ratio were of similar magnitude to those secured using 1:10-1:20 liquor ratios in the presence of 50 gl(-1) NaCl. The promotional effect on dye uptake imparted by both added electrolyte and reduced liquor ratio was interpreted in terms of their effects on the substantivity of the reactive dyes towards the cotton substrate. The two, seemingly different actions of adding electrolyte such as NaCl or Na2SO4 to the reactive dye dyebath and reducing the liquor ratio used for immersion dyeing have the same result, namely that of encouraging dye aggregation in the dyebath, which reduces the solubility of the direct dye in the dyebath, which, in turn, shifts the inherent preference of the dye to favour the aqueous phase towards the fibre phase. It is thus possible to dye cotton using pure reactive dyes in the complete (ie 100%) absence of added inorganic electrolyte. The ensuing dyeings were of realistic depths of shade and displayed excellent levels of wash fastness.
机译：在棉花上的三种液体比（1:50，1：1： 20,1：10,1：6,1：3,1：2和1：1.5）。在使用Al：1.5液中的不存在的电解质的情况下获得的染色阴影的深度与使用1：10-1：20的液比在50gL（-1）NaCl存在下固定的那些相似的大小。以额外的电解质和降低的液体比赋予染料吸收的促进作用，并在其对朝向棉基材的反应性染料的实心度的影响方面解释。将电解质（例如NaCl或Na 2 SO 4）添加到反应性染料Dyeebath中的两种，看似不同的作用，并降低用于浸渍染色的液体比具有相同的结果，即促进染浴中的染料聚集的液体率，这降低了直接的溶解度染料中的染料又转移染料的固有偏好，以使水相朝向纤维相。因此，可以使用完全（即100％）不存在添加的无机电解质中的纯活性染料染色棉染料。随后的染色具有现实的阴影深度，并显示出优异的洗涤牢度水平。

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