玫瑰红色素对羊毛和蚕丝的媒染性能

以FeSO4和ZnSO4·7H2O为媒染剂,采用玫瑰红提取液对羊毛和蚕丝进行染色,探讨了媒染温度、时间、媒染剂用量、玫瑰红提取液用量对媒染性能的影响,以及染色织物的牢度。结果表明,媒染剂FeSO4和ZnSO4·7H2O用量为2g／L、提取液用量为10mL、羊毛和蚕丝织物均为2g时,染色织物具有较深的色泽和良好的色牢度。     

西藏本土天然植物蕞提取液对氆氇染色工艺的研究

采用超声波提取法对西藏本地植物蕞进行提取,而后用提取液对氆氇进行媒染染色,探讨了染料提取方法、提取工艺、染色工艺、媒染剂种类、媒染剂用量、提取液用量、染液pH、染色温度和时间对氆氇染色性能的影响,并测试了染色氆氇的染色牢度。结果表明：采用超声波提取法提取染液,染色工艺为前媒染色法;染料用量50m L/L,硫酸亚铁（0.5g/L）,染色时间为120min,染浴的p H值为5,染色温度为85℃。此时,染色氆氇的耐水洗色牢度可达3～4级,耐摩擦色牢度可达4级及以上。     

槐米染色棉织物工艺及其抗紫外性能研究

为实现槐米染料的工业化应用及提高棉织物的功能性,分析了使用壳聚糖、Al3+、Fe2+媒染剂预媒染色法对棉织物染色效果的影响,重点研究了铝预媒染方法染色温度、染色时间、pH值等工艺参数对染色棉织物K/S值的影响,并测试了槐米染色棉织物的抗紫外性能。结果表明:直接使用槐米染色的效果较差;壳聚糖媒染对上染效果影响不大,使用铝、铁媒染剂,可得到不同颜色的棉织物;铝媒染剂染色棉织物为鲜艳的黄色,为较好的媒染方法;铝预媒染染色方法染色优化条件为:温度为80℃,染色时间120分钟,染浴pH值为6.8;铝预媒染染色棉织物具有较好的抗紫外性能。     

牡丹花天然植物染料对羊毛织物染色性能的研究

将黄色牡丹花天然植物染料用于羊毛织物的染色,探讨了媒染剂和染色方法对羊毛织物染色效果的影响,通过单因素试验和正交试验筛选出以明矾为媒染剂时牡丹花黄色染料对羊毛织物的最佳染色工艺条件,得到了色泽鲜艳的黄色羊毛织物.     

用红木叶生态染料染棉的工艺探讨

用生态染料红木叶对棉进行染色,采用不同的媒染剂,分别为明矾、氯化亚锡、氯化钙、硫酸铜和硫酸亚铁,不同的媒染剂浓度;同时结合预媒、同媒和后媒三种媒染方法进行试验,对试样在水洗、摩擦、日晒以及汗渍牢度等方面的性能差异进行了对比。     

栲胶对丝绸染色的工艺研究

论文以栗木和余柑作为染料对丝绸染色进行研究。用这两种栲胶(水解类)对丝绸进行直接染色,并配合不同媒染剂进行后媒染和预媒染染色。通过对比试验,性能测试,确定栲胶最佳染色工艺条件:栗木采用配合媒染剂SnCI2后媒染法,酸固色pH 3.5,染色时间30 min;余柑为直接染色,酸固色pH 6.5,染色时间30 min。     

栀子染料染棉针织物的染色工艺研究

以栀子染料染得更深、牢度更好的棉针织物为出发点,主要研究了栀子染料的提取,金属离子Fe^2＋,Al^3＋对棉针织物媒染效果,并通过单因素优化、正交实验确定栀子染料金属铝预媒染的最佳工艺。结果表明：铝离子预媒染用于棉针织物染色的最佳工艺为：浴比1：25,温度75℃,染液pH值5,媒染剂用量6％（owf）,染料用量45％（owf）。     

改性姜黄素对棉织物染色性能初探

利用硼氢化钠对姜黄素进行还原改性,将改性后的姜黄溶液作为染液,对纯棉布进行染色,同时研究了用壳聚糖、壳聚糖季铵盐、三氯化铝、稀土(硝酸亚铈-柠檬酸)作为媒染剂在不同pH下的上染效果。研究表明:改性姜黄素溶液对纯棉布的染色色差与上染率随着pH的降低而增大;在弱酸性时染色效果最好,预媒处理会显著提高染色效果。总的来说,用稀土作为媒染剂进行媒染处理的染色效果最好。     

灵菌红素的染色性能研究

灵菌红素是一类含甲氧基吡咯骨架结构的天然色素,具有多种生物活性,难溶于水,易溶于乙醇,所以用乙醇与水的混合溶液作为灵菌红素染色的溶剂。本文研究了温度、浴比、pH值等因素对灵菌红素染羊毛、腈纶的染色动力学的影响,结果显示最佳染色工艺条件。由于灵菌红素对羊毛的染色牢度较低,进一步讨论了媒染剂对灵菌红素上染羊毛织物的影响,结果显示Al^3＋处理后的染色织物色光变化较小,皂洗牢度和干湿摩擦牢度均有提升。抗菌性实验说明用灵菌红素染色后的织物具有良好的抗菌性。     

金盏菊植物色素对真丝织物染色性能研究

以提取的金盏菊色素为染料,对真丝织物进行染色。采用硫酸铝钾预媒染法,研究了染色时间、金盏菊色素用量和染色温度对真丝织物染色性能的影响,测试了染色后真丝织物的色牢度、表面形貌结构、傅里叶红外变换光谱、X射线衍射光谱及抗氧化性能。结果表明,通过测定染色后真丝的K/S及E得出最佳染色条件为：染色时间65 min、金盏菊色素用量10%(o.w.f.)、染色温度70℃。金盏菊色素染色后的真丝织物具有良好的耐摩擦色牢度和耐皂洗色牢度,染色后织物的自由基清除率可达88.39%。     

活性染料用于拉细羊毛染色的研究

研究了四类活性染料染拉细羊毛的工艺条件和十二个染色配方。与媒介染料相比，用活性染料对拉细羊毛染色可获得更好的效果。染料的溶解度、匀染性、上色率、固色率均好于媒介染料，颜色的批差小。研究结果表明：除煮呢沾色牢度外，染色羊毛的各项牢度均优于媒介染料。     

提高深色羊绒摩擦牢度的研讨

深色羊绒摩擦牢度与纤维本身所合“杂质”有关，染色前，用合有替合剂和表面活性剂的水溶液进行前处理，用媒介染料染羊毛时添加分散替合剂，用Lanasol活性染料染羊毛时添加由异丁醇、苄醇、脂肪叔胺聚氧乙烯改组成的匀染剂可以提高摩擦牢度。探讨了染料的化学结构、染料的纯度、染料的提升力、染色后处理与干、湿摩擦牢度的关系。     

Improving the colorfastness of poly(ethylene terephthalate) fabrics with the natural dye of Caesalpinia sappan L. Wood extract and the effect of chitosan and low-temperature plasma

The effect of a low-temperature plasma and/or chitosan pretreatment as a mordant on the dyeing of poly(ethylene terephthalate) fabrics with an aqueous extract of Caesalpinia sappan L. wood, which showed a remarkably high coloring property in a natural dyeing system, was investigated. After dyeing, scanning electron microscopy, add-on, color measurements, and fastness to washing tests were performed. Dyeing with the C. sappan L. extract led to fair-to-good fastness properties in conventional natural dyeing. The results clearly show that the pretreatment with chitosan and/or plasma is better than a metal mordant in terms of the dye uptake and reduction in the dyeing time, that the proposed pretreatment coloration reaction could be carried out without the need for repetitive dye steps, and that it prevents the excessive use of dye chemicals, thereby resulting in a more ecofriendly process. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008     

Oxygen plasma pretreatment improves dyeing and antimicrobial properties of wool fabric dyed with natural extract from pomegranate peel

This paper presents the application of conventional potassium aluminium sulphate wool mordanting and a biochemical method with silver nitrate (as antimicrobial agent and mordant)_, alone and in combination with oxygen plasma, as part of comprehensive research into pretreatment processes for wool dyeing with natural extract from pomegranate peel (Punica granatum L.). Pretreatment with oxygen plasma significantly improved the hydrophilicity and tensile strength of all tested samples and showed that oxygen plasma can improve K/S, washing fastness, and even replace certain mordants in wool dyeing with natural pomegranate dye. All dyed samples exhibited good antibacterial activity against Staphylococcus aureus, which can be contributed to the phenol content in pomegranate dye. Only after 28 days of intensive ageing in natural weathering conditions did K/S and antibacterial activity against Klebsiella pneumoniae slightly decrease in dyed samples pretreated with oxygen plasma.     

Mordant dye application on cotton: optimisation and combination with natural dyes

It is well known that cotton fibres can be dyed through the formation of coordinate bonds involving cellulose chains, mordants such as alum, and natural dyes such as alizarin. Similarly, synthetic dyes known as mordant acid dyes can be used to dye wool fibres. Unlike mordant dyes on wool, the fastnesses of natural dyes on cotton are often low. Although concerns surrounding textile sustainability have sparked renewed interest in the use of natural dyes, extensive replacement of synthetic dyes with natural dyes is neither practical nor fundamentally possible. However, similarities in dyeing methods using mordant and natural dyes raise the possibility of using mordant dyes as alternatives to natural dyes in the dyeing of cotton. Further, the potential for combining suitable dyes from these two classes to expand the colour gamut currently available from natural dyes on cotton seem worthy of exploration. The results of this study indicate that shades comparable with those produced by natural dyes can be obtained on cotton using select mordant dyes following Fe²⁺ and Al³⁺ pretreatments. The best results were obtained using a two‐step/two‐bath process and dyes such as CI Mordant Blue 13 and CI Mordant Orange 6. In evaluations of mordant and natural dye combinations using the two mordant dyes logwood and Osage orange as prototypes, interesting fabric shades were obtained. However, the fastness properties of these dyes must be improved in order to produce commercially viable dyeings.     

Pomegranate fallen leaves as a source of natural dye for mordant-free dyeing of wool

The application of metal mordants is usually necessary in dyeing of wool with natural dyes to improve the dye exhaustion and fastness properties. The majority of metal salts generally used as mordants are considered as toxic and it is important to find replacements for them. Plant sources with high content of tannins are good candidates as bio-mordant or colourant to overcome this drawback. In this study, the waste fallen leaves of pomegranate tree were used as a source of natural dye for the eco-friendly dyeing of wool fabric without the use of metal mordants. The dyeing process variables including dye concentration, dyebath pH, and temperature were optimised using response surface methodology to obtain the highest colour strength. The colour strength was increased by increasing the natural dye powder up to 100%owf while the optimum pH and dyebath temperature were 4 and 100°C, respectively. The sample dyed under the optimal condition exhibited good fastness properties against washing and light. This study approved the potential of Punica granatum fallen leaves for the dyeing of wool without any mordant, while high fastness properties were obtained.     

Iron Complexed Acid Mordant Dyes and Their Application on Nylon 6 and Wool

The replacement of chromium (III) by safer iron (II) has been investigated, using three commercial azo acid mordant dyes. These dyes have been applied to nylon 6 and wool fabrics and the dye exhaustion has been calculated at different temperatures. Color properties and fastness to light, washing and rubbing have been described. The characterization of the unmetallized and metallized dyes was investigated by HPLC analysis, thin layer chromatography, and UV/Vis spectroscopic techniques. Lightfastness shows that Fedye3 is a strong candidate for dyeing nylon 6 and wool fabrics with high lightfastness.     

Extraction of polyphenolic substances from bark as natural colorants for wool dyeing

In Europe, considerable amounts of bark are available from wood‐processing industries such as forestry and timber production. Polyphenolic components can be collected by hot water extraction. The extracted compounds can then be applied as colorants in textile dyeing operations. In this study, a comparative assessment of four different tree species with regard to their colouristic potential for wool dyeing was performed. Aqueous extracts from alder, ash tree, spruce and oak bark were prepared and analysed for their total phenolic content and ultraviolet (UV) absorption at 360–370 nm. The extracts were used for meta‐mordant dyeing by adding iron sulphate mordant (FeSO₄ × 7H₂O). For comparison, iron salt‐based dye lakes were prepared and used in dyeing experiments. For each tree species, a specific correlation between the total phenolic content of the dyebath and the colour depth in terms of K/S and CIELab coordinates was observed, both for the aqueous extracts and the dye lakes. Based on this relationship, standardisation and quality control of raw materials and dye lakes can be installed as important stages in the industrialisation of natural colorants from bark. The preparation of concentrated dye lakes permits formation of a concentrated colorant as dye product, which then can be standardised and delivered to textile dyehouses, similar to synthetic dyes. The preparation of dye lakes offers a relevant route towards achieving the commercialisation of bark extracts as natural colorants.     

Application of rare earth as mordant for the dyeing of ramie fabrics with natural dyes

Selecting appropriate metallic compounds as mordants is essential for dyeing with natural dyes. This paper presents the application of rare earth compounds as mordant for the dyeing of ramie fabrics with four kinds of natural dyes. The influences of pre-mordanting, simultaneous mordanting, and post-mordanting on the dyeing effect were explored. The post-mordanting was proved to give rise to the highest dye uptake. The effects of dyeing conditions including dyeing temperature and time, dyeing bath pH and the concentration of rare earth on the dye uptake were investigated systematically. The fabrics dyed with natural dyes in presence of rare earth as mordant exhibited high color shade stability in the baths with pH varying from being acidic to neutral and alkaline. Employing rare earth as mordant apparently raised the color fastness to washing, rubbing and light of the ramie fabrics dyed with the natural extracts. In comparison with the commonly used metallic salts, using rare earth chlorides as mordants can greatly reduce the ionic concentration employed in natural dyeing. This study proved that rare earth would be a kind or promising environmentally friendly mordant in natural dyeing.