Matching Dyeing and Properties of Silk Fabrics with Natural Edible Pigments

The silk fabrics were matching dyed with three natural edible pigments(red rice red,ginger yellow and gardenia blue).By investigating the dyeing rates and lifting properties of these pigments,it was observed that their compatibilities were excellent in the dyeing process:dye dosage 2.5%(omf),mordant alum dosage 2.0%(omf),dyeing temperature 80℃and dyeing time 40 min.The silk fabrics dyed with secondary colors exhibited vibrant and vivid color owing to the remarkable lightness and chroma of ginger yellow.However,gardenia blue exhibited multiple absorption peaks in the visible light range,resulting in significantly lower lightness and chroma for the silk fabrics dyed with tertiary colors,thus making it suitable only for matte-colored fabrics with low chroma levels.In addition,the silk fabrics dyed with these three pigments had a color fastness that exceeded grade 3 in resistance to perspiration,soap washing and light exposure,indicating acceptable wearing properties.The dyeing process described in this research exhibited a wide range of potential applications in matching dyeing of protein-based textiles with natural colorants.

Biodegradability of terephthalic acid in terylene artificial silk printing and dyeing wastewater

As the characteristic pollutant, terephthalic acid(TA)was in charge of 40%—78% of the total COD of terylene artificial silk printing and dyeing wastewater(TPW-water). The studies on biodegradability of TA were conducted in a serial of activated sludge reactors with TPW-water. TA appeared to be readily biodegradable with removal efficiency over 96.5% under aerobic conditions, hardly biodegradable with removal efficiency below 10% under anoxic conditions and slowly biodegradable with a turnover between 31.4% and 56.0% under anaerobic conditions. TA also accounted for the majority of BOD in TPW-water. The process combined by anoxic, anaerobic and aerobic activated sludge reactor was suitable for TA degradation and TPW-water treatment. Further, the aerobic process was essentially much more effective than the anaerobic or anoxic one to degrade TA in TPW-water.

The Application of Tea Dyeing to Silk

Vegetable dyes are eco-friendly throughout the full production process. A study is conducted with the purpose of assessing the properties of dye extracted from green tea, black tea and the tea tree cultivated and used in Jiang Nan area of China. The extracted dyes are applied with and without mordants on silk fabric and the dyeing properties are evaluated.

Study on Dyeing Performance of Cationic Water-soluble Sulphur Black on Silk

A novel polyquaternaryammonium cationic sulphur black dye was synthesized and its dyeing behavior on silk was studied. The dye exhibited excellent dyeing fixation of up to 98.2 %, as well as excellent dyeing fastness on silk.

THE EFFECTS OF PLASMA-INDUCED GRAFT COPOLYMERIZATION WITH ACRYLIC ACID ON THE STRUCTURE AND DYEING PROPERTIES OF MULBERRY SILK

The effects of plasma-induced graft copolymerization with acrylic acid (AAc) on the structure and dyeing properties of mulberry silk are investigated. Through the transmission infrared spectroscopy(IR) , attenuated total reflection infrared spectroscopy(ATR-IR) and X-ray photoelectron spectroscopy(XPS) studies, changes of the surface structure and composition are observed. The results show that plasma-induced graft copolymerization has a different meehanism from that of chemical graft copolymerization. The plasma graft copolymerization brings AAc branch polymers into the surface of silk through the initiation of some kinds of oxygen and nitrogen groups created by plasma. That is just the reason that the dyeing ability and color fastness of plasma-grafted silk for cationic dyestuff increase and its mechanical properties have not been changed significantly.

The effect of atmospheric pressure glow discharge plasma treatment on the dyeing properties of silk fabric

In this study,the effects of plasma treatment parameters on surface morphology,chemical constituent,dycabiliiy and color fastness of silk fabric were investigated.Atmospheric pressure glow discharge plasma generated with different applied voltages(0 kV to 45 kV)was used to treat the surface of silk fabrics.C I Natural Yellow 3 was used to dye untreated and plasma-treated silk fabrics.The physical analysis based on scanning electron microscopy showed that the surface of silk fabrics was affected by plasma treatment.The chemical analysis was investigated with x-ray photi>elcctron spectroscopy and attenuated total reflection Fourier transform infrared spectroscopy.The results showed that the content of C Is decreased with the increasing applied voltage,the content of N Is and O Is increased with the increasing applied voltage.The increasing K/S values represented that the dyeability of silk fabrics was improved after plasma treatment.The color fastness to dry and wet rubbing was decreased after plasma treatment.

SILK DYEING IN A MIXTURE OF ACID DYES

The equilibrium and kinetic studies for the mixture dyeing of silk with acid dyes have been made. The results of the binary mixture dyeing of silk suggested that so-called”blocking phenomenon”took place in the similar manner to the nylon dyeing. The rate constants of silk dyeing and diffusion coefficient of the dye in silk were obtained. the presence of sodium slkysulfate in the dyeing was found to slow the dyeing rate,but accelerat thedye diffusion.

REACTIVE DYES CONTAINING(N-METHYL-β-SULFOETHYLAMINO)ETHYLSULFONYL GROUPS FOR SILK FIBRES

Silk dyeing with several classes of reactive dyes was studied.A class of reactive dyes con-taining(N-methyl-β-sulfoethylamino)ethylsulfonyl groups for silk is presented.A new method forintroducing such a reactive group and a kinetic studies on the reaction mechanism involved are pro-posed.A kinetic isotopic effect on dyeing mechanism with silk is discussed and the optimum dyeingtechniques recommended.Dyeing or printing was carried out in neutral media;brilliant shades,goodfastness,high fixation and excellent storage stability are given.

APPLICATION OF BLUE 2~# REACTIVE DYE ON NATURAL SILK WAX PRINTING

The optimum processing parameters of silk wax printing with Biue 2# reactive dye( vinyl- sulfone) at 40℃were deter-mined through orthogonal tests on its dyeing properties.The parameters were adopted in designing a wax printing process,which proved practical for actual production with a dye utility as 60% ,a Grade V side wet fastness and a decrease of only 2-4.1%in fabric strength. Also,some feasible measures are put forward in this paper on the major steps of the wax printingprocess.

PHOTOFADING MECHANISM OF ARYLMETHANE DYES ON REAL SILK

The effect of simulated silk compounds- amino acids and their yellowing substances onphotofading of ary1methane dyes.and the influence of external factors such as oxygen.pH-value.the wave band of light source and nickel salt on phototfading of the dyes on real silkare investigated. The results show that tryptophan and tyrosine well as their yellowing sub-stances accelerate photofading of arylmethane dyes;the photofading process of arylmethandyes on real silk is a photooxidation process and external factors exert different influences onit.

THE COMPATIBILITY OF MIXED ACID DYES ON SILK

The compatibility of mixed acld dyes on silk has been surveyed by means of ascheme for compatibility rating.Experiments on the Influence of different dyeconstltutions,the ratio of dye concentrations,and dyeing processes oncompatibility have been made.The compatibility or some productive reclpesformed mainly by Lanasyn Blue GL(Cl Acid Blue 127:1)and Milling Navy 5R(Cl Acid Blue 113)has also been measured.The paper indicates that the dyeswith the approximate affinities and diffusion coefficients,high ratio of dyeconcentrations,and reasonable dyeing processes make the good compatibillty ofmixed acid dyes on silk.It may be served as a guide to production in reasonablyselecting dyes and dyeing processes.

Dyeing Thermodynamics and Supramolecular Structure of Lac Red on Protein Fibers

The dyeing temperature of natural dye lac red on two kinds of natural protein fibers was studied, and the interaction between dyestuff and fiber was discussed through thermodynamic study and density functional theory (DFT) calculation. The optimum temperature for lac red dyed silk was 60˚C and wool showed a better response at 90˚C. The thermodynamics study revealed good Nernst isotherm and Freundlich adsorption models respectively, and the lac dye adsorption processes were both spontaneous and exothermic. The potential interaction of Laccaic acid A with the external environment by electrostatic potential and atomic charge distribution was first explored. With molecular simulation, Laccaic acid A and glycine composed 8 stable complexes. Then, typical hydrogen bonds, bond length, and binding energy, etc. were analyzed. The results revealed lac red on silk and wool fabric mainly depended on the weak hydrogen bonds and van der Waals force which determined the low dye fastness.

中国传统印染技艺研究发展现状

七项传统印染技艺被列入国家级非物质文化遗产代表性项目名录,分别是扎染技艺、蜡染技艺、蓝印花布印染技艺、香云纱染整技艺、艾德莱斯绸织染技艺、蓝夹缬以及和枫香印染技艺。当前研究重点主要有三个方面,包括纹样创新应用、产品设计开发及生产性保护和数字化保护。同时,香云纱染整技艺侧重薯莨染色工艺及河泥作用机理的研究,艾德莱斯绸织染技艺侧重宽幅及双面织物织造工艺的研究。另外,各项传统印染技艺在中国知网文献数量的差异也在一定程度上反映人们对其研究重视程度的不同。

The Effect of TDEA on Dyeability of Both Cotton and Silk

Effects of the non - alcohol finishing agent TDEA on dye-ing properties of cotton and silk fabrics were examined. TDEA improving substantivity and having a fixation ac-tion on cotton fabrics dyeing with reactive dyes and sharp increasing dry and wet crease recovery angles of cotton have been demonstrated. The slightly lower color yields and duller in shade on the TDEA finished silk fabrics dyeing with some acid dyes have been indicated.

真丝织物的植物染料染色

采用植物红和植物蓝染料对真丝织物进行直接染色,探讨了染液浓度、染色pH、染色温度、染色时间、元明粉用量、固色剂用量对真丝织物染色效果的影响。通过正交试验得到的最佳染色工艺为:植物红染料质量分数1.00%(omf),染液pH为3,染色温度90℃,染色时间40 min,元明粉质量浓度5 g/L,固色剂质量分数1%;植物蓝染料质量分数1.00%(omf),染液pH为7,染色温度90℃,染色时间55 min,元明粉质量浓度5 g/L,固色剂质量分数1%。染色织物具有较好的耐皂洗色牢度、耐摩擦色牢度和耐汗渍色牢度,基本达到3~4级以上。

包覆交联法提升玫瑰茄红上染真丝织物色牢度的应用

文章以甲基丙烯酸甲酯、丙烯酸丁酯、2-羟基乙基甲基丙烯酸酯和甲基丙烯酰氧丙基三(三甲基硅氧烷基)硅烷为原料,合成了聚丙烯酸酯类高分子,再将整理后的织物浸于戊二醛溶液中,以达到化学接枝交联的目的,并将其作为纤维包覆材料应用于天然玫瑰茄红色素染色的真丝织物。实验结果表明:整理后真丝织物的色牢度明显提升,湿摩色牢度从2~3级提升到4级,皂洗色牢度从1~2级提到3~4级,并且整理后织物表现出较好的防水效果,水接触角从接近0°提到125°;机械性能显著改善,断裂强度从8.73 MPa提高到26.37 MPa。

天然栀子蓝染料真丝织物印花工艺

研究天然栀子蓝染料对真丝绸的印花性能,探讨媒染方法、媒染剂种类、媒染剂用量、汽蒸时间、pH等因素对印花性能的影响,选择硫酸亚铁作为媒染剂,优化栀子蓝染料真丝织物印花工艺。结果表明,优化栀子蓝染料真丝织物印花工艺为:同媒法印花,栀子蓝染料2%,瓜尔胶5%,硫酸亚铁3%,尿素8%,pH为3,汽蒸时间20 min左右,印花织物得色较深,各项色牢度较好。

柞蚕丝和羊毛织物的橄榄苦苷苷元染色

为了提升化合物橄榄苦苷苷元的利用价值,将其作为天然染料用于柞蚕丝和羊毛织物的染色,优化了染色工艺条件,利用UV-vis分析了两种织物的呈色反应过程,测试了染色织物的色牢度和抗菌性。结果表明:橄榄苦苷苷元作为蛋白质纤维天然染料具有可行性,织物获得了较高的染色深度,生成颜色产物的最大吸收波长在280nm和341nm处。柞蚕丝织物的最佳染色工艺为:橄榄苦苷苷元质量分数4%(omf),染色pH=8.0,50℃染色2.0h;羊毛织物的最佳染色工艺为:橄榄苦苷苷元质量分数5%(omf),染色pH=7.5,50℃染色2.0h。染色织物的各项色牢度均在4级及以上,抗菌效果较好。

真丝织物的尤加利叶拓染工艺

采用尤加利叶对真丝织物进行拓染,探讨直接拓染和不同媒染剂预媒拓染方法对拓染效果的影响,发现直接拓染和硫酸亚铁预媒拓染两种方法效果最佳。尤加利在真丝织物上直接拓染的最佳工艺参数为:轧车压力3.0 kg/cm^(2)(织物含水率123%),汽蒸温度110℃,汽蒸时间50 min;硫酸亚铁预媒拓染的最佳工艺为:媒染剂质量浓度0.20 g/L,汽蒸温度110℃,汽蒸时间50 min。

基于二氧化硫脲还原剥色的丝织物扎染新工艺

扎染作为时尚流行元素,其产品设计一直是个热门话题,当前文献报道大多侧重扎染的图案设计、扎花技法和产品应用,深入研究其染色工艺的相对较少。文章提出先以活性染料对丝织物染地色,扎染时采用二氧化硫脲作为还原剂对地色染料进行剥色,同时选择中性染料对丝织物进行着色,以开发扎染新工艺。单因素影响实验结果表明,在无碱条件下,二氧化硫脲质量浓度1g/L、还原温度90℃、还原时间6min时,诺威克隆红S-B、红EC-4B、橙EC-3R和蓝EC-R四只活性染料染色丝织物的剥色率分别达到95.43%、97.54%、92.91%和96.62%。扎染时选择相同浓度与温度、还原时间大于6min,活性染料染色的丝织物通过单色扎染可以获得与常规扎染相反的图案效果,也可以通过中染料着色获得两套色或以上的扎染效果。