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AbstractThis article models and optimizes the effect of dyeing parameters on obtained color of fabric samples dyed with three cold bifunctional reactive dyes, namely, C.I. Reactive Yellow 145, C.I. Reactive Red 238 and C.I. Reactive Blue 235, in order to use them in color formulation. The studied dyeing parameters are electrolyte concentration, alkali concentration, liquor-to-fiber ratio and temperature of dyeing process. The influence of these parameters was analyzed for four different shades: 0.1%, 1%, 2% and 4%. Two criteria of evaluation are studied and optimized: the exhaustion and the fixation yields. Linear modeling of optimal concentrations of electrolyte and alkali according to the dye concentration was developed, allowing the calculation of optimal quantities which should be added to the dye bath for any dye concentration. Color coordinates and fastness (washing, rubbing and light fastness) of samples dyed with optimal conditions are also evaluated and discussed. 相似文献
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ABSTRACTTo enhance the dye fixation of pad-steam dyeing with reactive dyes, we used five kinds of dyes and water–ethanol dyeing medium to investigate the hydrophobic effect in dyeing process. The results indicated that the higher the molecule weight per water soluble group, i.e. the stronger dye hydrophobicity, the higher the dye fixation rate. When dyed with hydrophobic dye, both the alkali and steaming time can be reduced to realize the saving of chemicals and energy. For the more hydrophobic C.I. Reactive Orange 16 (RO16), the appropriate sodium carbonate concentration is 20 g/L, which is 10 g/L lower than the 30 g/L of C.I. Reactive Violet 5 (RV5). Similarly, RO16 just needed 2 min of steaming time to obtain the maximum K/S value, while RV5 needed 3 min. Enhancing the hydrophobicity of dyeing medium can also increase the dye fixation rates and K/S values. The K/S values and fixation rates of fabrics dyed with RV5 increased up mostly by 31.2% and 14% via using ethanol instead of 32 vol.% water in dyeing medium, respectively. All the dyed fabrics exhibit good color fastness. 相似文献
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棉织物在二甲基亚砜/四氯乙烯(DMSO/PCE)染色体系中用C.I.活性红48染色,探讨了低碱冷冻预处理温度、时间和碱质量分数对上染率、固色率和织物强力的影响,同时研究了染色时棉织物上水和碱含量在纤维相和溶剂相分布的变化对染料上染率和固色率的影响。结果表明:低碱冷冻预处理能够提高棉纤维的可及度;经最佳条件(氢氧化钠质量分数8%、温度-10°C、冷冻2h)预处理的棉织物在DMSO/PCE体系中水和碳酸钠的含量均有不同程度的提高,C.I.活性红48上染率变化不大,固色率提高约3%,经、纬向撕破强力相比于未处理棉织物分别提高45%和20%。 相似文献
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活性染料染锦纶色泽较鲜艳 ,染色牢度尤其日晒牢度较好 ,且可与中性染料、弱酸性染料拼染 ,因此 ,色谱的选择范围较大。该文探讨其染色机理、各工艺因素对染色结果的影响 ;并对中性浴染色法、酸性浴染色法 ,以及先中性或酸性后碱性浴染色法的实用性进行比较 ,指出艳蓝色活性染料以中性吸色碱性固色工艺效果为佳 ,其余活性染料则以酸性吸色碱性固色效果为好。由于活性染料染锦纶匀染性较差 ,必须采用匀染工艺和匀染剂染色 ,以获得良好的匀染效果。 相似文献
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活性黑5(活性黑KN-B)是活性染料中产量最多、用途最广的一种染料,但是最大的不足是乌黑度不高。10余年前,利用补色原理,复配了活性橙82,乌黑度有所改进,但尚有不少问题。提高活性黑5的乌黑度是当前热门的研究课题之一,主要筛选溶解度高,直接性、反应性、相容性与活性黑5匹配的橙色和红色活性染料。 相似文献
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竭染用活性染料的染色特征值及其应用(一) 总被引:1,自引:0,他引:1
竭染用活性染料最重要的是提高染色匀染性及重演性。影响这些性能的主要因素是染料对纤维的亲和力、竭染速度、固着速度及染料在纤维上的移染性。染色特征值SERF充分表现出这些因素,并且构成了竭染用活性染料最重要的染色特征,称之为竭染用活性染料的“指纹特征”,对如何选择和应用竭染用活性染料提供定量依据。 相似文献
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为了探讨泡沫染色对棉织物染深色的可行性,研究了活性艳红KE-3B在棉织物泡沫染色中的提升力和染色性能;为了推广泡沫染色在纺织加工中的应用,研究了不同类型活性染料在对棉织物的泡沫染色浅、深色工艺中的固色速率和织物K/S值与固色时间的关系。研究结果表明:活性红KE-3B在泡沫染色中具有良好的提升力,经不同质量浓度泡沫染色的织物匀染性好。在4种不同类型的活性染料泡沫染色中,染料的固色率均能达到70%~90%,KN型活性染料固色率最高,固色速率顺序为活性黑KN-B>活性大红K-2G>活性艳红KE-3B>活性艳红X-3B。 相似文献
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研究了双己基二甲基溴化铵(DDAB)作促染剂时,对三支活性染料在丝绸上上染的促染作用效果和促染动力学。研究结果表明:DDAB对活性染料在丝绸上的上染具有高效的促染作用。活性红B-3BF、活性黄B-4RFN、活性深蓝B-2GLN三支染料的平衡上染率分别达到98.7%、98.4%和97.3%。DDAB浓度分别为2.24g/L、2.72g/L和3.60g/L时,三支活性染料的上染率就已基本达到最高。固色率分别为98.2%、97.4%和96.3%。三种活性染料上染丝绸的吸附动力学数据均符合准二级速率方程。活性红B-3BF、活性黄B-4RFN、活性深蓝B-2GLN的表观活化能分别为18.23、14.83、15.75 kJ/mol。 相似文献
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为研究并有效控制活性染料在冷轧堆染色中的水解,应用高效液相色谱(HPLC)对双乙烯砜型活性染料C.I.活性黑5在低温下的水解性能进行定性及定量分析。结果表明:在碱性缓冲液中,C.I.活性黑5的消除反应及水解反应为假一级反应,在其消除反应速率及水解反应速率均随着缓冲液pH值增加而显著提高;在30℃、pH值为9时,C.I.活性黑5的水解速率为3.5×10-5/min-1;相同温度下,在pH值10、11、12时该染料的水解反应速率常数分别是pH值为9时的3、27、233倍,因此,C.I.活性黑5在冷轧堆染色时,在 pH值为9~10的缓冲液中水解稳定性较好。 相似文献
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为提高活性染料染色丝绸的固色率和降低促染剂用量,研究了双辛基二甲基溴化铵(DODMAB)作促染剂对三支活性染料在丝绸上的促染规律。结果表明:DODMAB对活性染料上染丝绸具有高效的促染作用,促染剂质量浓度在4g/L时,活性红B-3BF、活性黄B-4RFN、活性深蓝B-2GLN上染率分别达到了98.7%、95.32%、94.96%,固色率分别为96.3%、89.18%、90.28%;三支活性染料染色丝绸的皂洗牢度均达到4-5级;三支活性染料在丝绸上的吸附动力学均符合准二级动力学模型。 相似文献
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Nawshin Farzana Md. Zulhash Uddin Md. Mahbubul Haque Abu Naser Md. Ahsanul Haque 《Journal of Natural Fibers》2020,17(7):986-1000
ABSTRACT
Bombyx mori
muslin silk fabric was dyed with three different bi-functional reactive dyes in exhaust method. Dyeability of the silk fabric was analyzed by reflectance spectra, microscopic appearance, color strength, and saturation limit. Thermal influence on dye exhaustion, migration index, level dyeing factor, and color fastness properties were also investigated. Different kinetic models were approached to study dynamic behavior of dye adsorption and predictability of the models was assessed by co-efficient of regression (r2), root mean square error (RMSE), and mean absolute error (MAE). Some physico-chemical parameters such as activation energy and chemical potential of dyeing were also evaluated. Brilliant color was observed on silk by all class of reactive dyes. A controlled dyeing condition was also suggested to avoid the risk of unlevel dyeing. Wet fastness properties exhibited excellent results on silk fabric. The adsorption data conformed to the pseudo second-order kinetic model with r 2 ≥ 0.94 and the activation energy (ΔE) valued (≥55 kJ/mol) within the range of chemisorption for all dyes. The increase of negativity of chemical potential supported higher dye uptake on silk at elevated temperature. 相似文献17.
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活性染料具有良好的耐湿摩擦色牢度和匀染性,但也存在一些不足,如对温度、碱剂的敏感性较大,染色重现性差,固色率相对较低,色牢度不佳等。通过实验阐释电导率在活性染棉大货重现性上的应用,规避可预见性问题,寻找达到染色最佳效果的途径。 相似文献