天然染料高粱红对柞丝绸的媒染性能研究

分别以金属盐和有机酸为媒染剂,研究了天然染料高粱红对柞丝绸的预媒、后媒法染色性能。结果表明,金属媒染剂和有机酸媒染剂对高粱红染料的染色性能均有所提高,其中金属媒染剂的效果较好,且后媒法好于预媒法。两种媒染剂对其牢度都有所提高。     

酸性媒介染料对毛织物染色的应用研究

针对不同颜色、不同染色方式的毛织物染色,介绍了酸性媒介染料的应用工艺,以及染色中需注意的相关问题,以期提高产品质量,降低生产成本,减少环境污染。     

棉织物的天然紫草色素染色

研究了紫草色素的提取方法以及提取工艺对色素溶出量的影响,并对紫草在棉织物上的媒处理及染色工艺进行了试验。结果表明,采用100%乙醇提取紫草色素,提取浴比(紫草的质量/无水乙醇的质量)1∶20～1∶30,提取温度40～50℃,提取时间2～4h;采用硫酸铝钾前媒法处理棉织物,硫酸铝钾质量浓度5g/L,媒处理温度70℃,时间30min,pH值为3～4;优化的染色条件为:染色温度60℃,pH值4,时间30～50min,紫草染液可重复利用1～2次;染色织物干摩擦牢度4～5级,湿摩擦牢度3～4级,皂洗牢度4级。     

固色剂PS可提高酸性媒介染料的摩擦牢度

羊毛用酸性媒介染料染深色时摩擦牢度较差,为解决这个问题,开发出了固色剂PS.经实验证明,固色剂PS不仅对酸性媒介染料有明显的增溶作用,且在染色后加入固色剂PS进行洗涤固色处理,可显著提高摩擦牢度;同时得出了最佳工艺条件:50℃,20min,处理液pH值为5～5.5.     

酸性媒介染料对鸡毛蛋白助剂交联改性羊毛条的染色性能

以有效利用废弃物,降低染色污染为目的,研究了鸡毛蛋白助剂交联改性羊毛条工艺,用自制反应性阳离子交联剂WLS将鸡毛蛋白助剂交联在羊毛条上,探讨交联改性工艺对酸性媒介染料染色性能的影响,优化最佳改性工艺及条件。研究确定出了先加入鸡毛蛋白助剂5 min后,再加入交联剂WLS的一浴两步法最佳交联改性工艺,并评价改性羊毛条酸性媒介染料染色效果。结果表明,改性羊毛条显著改善酸性媒介染料染色性能,上染百分率提高,而且耐摩擦色牢度有所提高。     

Sustainable extraction and dyeing of microwave-treated silk fabric using arjun bark colorant

ABSTRACT

Due to an increase in awareness of harmful aspects of synthetic dyes among the global community, the demand of natural dyes in textile sector has been dramatically increased. The current study has been conducted to explore new eco-friendly source of natural brown colorant from arjun bark for textile. Both bark powder and silk fabrics were microwave irradiated for 1–6 min. Dyeing was performed at different variables onto irradiated and un-irradiated silk using extracts obtained from irradiated and un-irradiated powder. To make the dyeing process more sustainable, two chemical and bio-mordants were employed at optimal conditions. The results show that acidified methanolic extract from irradiated powder (RP, 8g) has given high color strength if irradiated silk (RSi) is dyed for 65 min. at 65°C using dye bath of 1 pH in presence of 7% of Na₂SO₄ as exhausting agent. Good shades and improved fastness characteristics have been obtained by employing 1% of Fe (iron sulfate) and Al (aluminum sulfate) as Chemical and 1% of turmeric and pomegranate extracts as bio-mordants. Hence, microwave radiation has not only explored the coloring efficacy of arjun bark as potential source of natural brown dye but also made its applicability under sustainable conditions.     

工艺条件对酸性媒介染料溶解度影响的研究

从染料的合成工艺过程出发 ,研究了原料配比、盐析酸化条件、过滤、水质、染料的细度等对染料溶解度的影响。通过改变原料配比 ,增加过滤步骤 ,合理控制染料的细度和溶解温度及结晶条件 ,可降低染料中不溶物含量 ,有效地改善染料的溶解度 ,而对染料的色光和强度无影响。该研究从合成工艺过程出发 ,为改善染料的溶解度提供了可能性 ,对实际生产有着一定的指导意义     

Dyeing Properties of Natural Dyes Extracted from the Junipers Leaves (J. excelsa Bieb. and J. oxycedrus L.)

In this paper, two natural dyes were extracted from Junipers leaves (Juniperus oxycedrus L. and Juniperus excelsa Bieb.). Wool yarn (for carpet) was dyed with the extract using ferrous (II) sulfate, potassium dichromate and sodium sulfate as mordant. Then, CIELab (L*, a*, b*, c,* and h) values, color differences (ΔE) and color strength (K/S) values of dyed wool yarns were examined and the fastness properties of dyed wool against dry and wet rubbing were evaluated. According to the experimental results, the use of mordant increased the color strength of dye goods. All mordant increased the rub fastness of dyed samples such as similar scientific studies previously. Compared to two junipers, dyeing samples of J. excelsa are dyed darker than that of J. oxycedrus.     

应用草酸的天然染料印花织物白地上媒染剂的去除

为探寻一种能去除天然染料印花加工织物白地上媒染剂的方法,研究了以草酸为去除剂去除铁离子媒染剂的可行性。通过测试流变性分析了草酸对合成龙胶糊的影响,通过测试织物白度和强力探讨了汽蒸温度、时间、湿度和草酸用量对媒染剂去除效果的影响。实验结果表明:草酸对合成龙胶糊料的流变性没有太大的影响,但是可较好地去除白地处残留的铁离子媒染剂;去除的最佳条件为草酸用量0.35%~0.40%,汽蒸温度100℃,湿度100%,汽蒸时间8 min。