樟树叶天然染料对蚕丝织物的染色性能

研究了从樟树叶中提取的天然染料对蚕丝织物的染色性能。比较直接染色与媒染染色,选择硫酸亚铁、硫酸锌、明矾作为媒染剂,分析染色蚕丝织物的K/S值、L*值、C*值,直接染色的优化工艺为:染液5%(omf)、温度90℃、时间60 min、pH=4、浴比1∶25,最高K/S值为7.874。媒染染色明显提高了上染率,硫酸亚铁同浴媒染使K/S值最高升至22.512。采用媒染法染色后织物的耐皂洗色牢度、耐摩擦色牢度和耐日晒色牢度均有明显提高。     

固色和铁媒染对苏木染色丝织物颜色稳定性的影响

通过测试染色织物的颜色指标值（L﹡、a﹡、b﹡、c﹡值及K/S值）和色牢度,探讨了苏木天然染料媒染染色柞蚕丝织物及经固色处理的丝织物的颜色稳定性。研究结果表明,媒染和固色均会影响染色织物的颜色和颜色稳定性;固色可增加染色织物在不同pH值水溶液的颜色稳定性;铁媒染染色可以明显提高织物的耐洗色牢度,但不能增强织物的色光稳定性;铁媒染和固色对苏木染色丝织物颜色的光稳定性和氧漂稳定性均有改善;在高温条件下,铁媒染和固色不能增加苏木染色蚕丝织物的颜色稳定性,但固色可使染色织物更加艳丽。     

Influence of fixing treatment on the color fastness and bioactivities of silk fabric dyed with curcumin

The curcumin dyed silk has poor color fastness to wash, rub, and light. Two cationic polyamine fixing agents, one cationic etherifying agent and one cross-linker were applied to the fixing treatment of the curcumin dyed silk fabric. The color parameters, color fastness, and antioxidant and antibacterial bioactivities of the treated silk fabrics were determined. All the fixing treatments increased the rub and light fastness. In comparison to the non-reactive fixing agents, the cross-linker and etherifying agent exhibited stronger ability for improving the rub fastness and the wash fastness for staining, but they had greater influence on the color parameters due to their alkaline application conditions. Fixing treatment caused a great decrease in antioxidant activity, and a minor decrease in antibacterial activity. Among the four fixing agents, the cross-linker exerted the greatest impact on antioxidant and antibacterial activities due to its high ability of reaction with the phenolic hydroxyl groups of curcumin.     

Application of myrrh extract as an eco-friendly dye and antimicrobial agent on wool and silk fabrics part 2: antimicrobial activity and fastness property

ABSTRACT

We investigate the dyeing and antimicrobial properties of myrrh (Commiphora molmol) extracts on wool and silk fabrics, the use of eco-friendly materials such as sumac (Rhus coriaria), manjakani (Quercus infectoria), alum, and ferrous sulfate as mordants. The mordanting methods were optimized.

The best conditions of dyeing process were discussed in the first part of this study. Dyed fabrics were assessed for color strength (K/S), color fastness, and antimicrobial activity. Non-mordanted dyed wool and silk showed color fastness of grade 4–5. Dyed fabrics showed good antimicrobial activity, which was enhanced by mordanting.     

高粱红天然染料对羊毛织物的媒染染色研究

文章采用高粱红天然染料对羊毛织物进行了媒染染色实验研究.通过正交试验方法,确定了铁预媒法及铁后媒法媒染染色的工艺条件.实验结果表明:铁预媒法染色时,染液浓度对色深影响最大,浓度升高,色深增加;pH值的影响次之,pH值升高,色深减小.铁后媒法媒染染色时,Fe2 浓度对色深的影响最大,Fe2 浓度升高,色深增加;温度的影响次之,温度升高,色深增加.经高粱红铁媒染后的羊毛织物干、湿摩擦色牢度和皂洗色牢度均较好,达到4级,说明该染料适用于羊毛织物的染色.     

碱性条件提取茶叶天然染料及其在蚕丝织物染色中的应用

针对茶叶天然染料的碱性提取及提取液对蚕丝织物的染色进行了研究。用碳酸钠水溶液提取茶叶天然染料,探讨了碳酸钠用量、提取温度、提取时间对茶叶天然染料提取效果的影响及染色pH值、染色温度、染色时间、硫酸钠用量等对蚕丝织物直接染色效果的影响。研究结果表明茶叶碳酸钠水溶液提取物染色蚕丝织物比茶叶水提取物染色蚕丝织物的颜色更浓。茶叶天然染料提取的优化工艺为：碳酸钠8g/L,提取温度90℃,提取时间40min。茶叶提取液对蚕丝织物直接染色的优化工艺为：染液pH值4.00左右,硫酸钠40g/L,染色温度90℃,染色时间60min,浴比50:1。碳酸钠水溶液提取物染色蚕丝织物具有较好的牢度性能,媒染可适当提高染色蚕丝织物的耐洗色牢度。     

高粱红色素的真丝织物染色性能研究

通过对高粱红色素的萃取方法进行试验，确定了最佳萃取条件；通过正交试验及单因素试验方法，对桑丝织物进行直接染色、预媒法染色、后媒法染色试验。结果表明，桑丝织物经高梁红色素染色后的摩擦牢度达4级，皂洗牢度3级，铁媒染后皂洗牢度提高到4级。     

麻栎壳染料的提取及在真丝织物中的应用

以水为溶剂,采用煎煮法提取麻栎壳染料,并将其用于真丝织物的染色,试验优化了染料的提取工艺及染色工艺.结果表明:优化的提取工艺为料液比1:50,80℃提取40 min,经过滤、浓缩、干燥后,麻栎壳染料得率为32.68％;优化的染色工艺为pH值5～6,浴比1:40,80℃染色40 min.染色后真丝织物的色牢度达4级以上,...     

UV protection properties of silk fabric dyed with eucalyptus leaf extract

A natural dye extracted from eucalyptus leaves was applied to a silk fabric using two padding techniques, namely the pad‐batch and pad‐dry techniques, under different conditions. It was observed that with an increase in the dye concentration, the ultraviolet (UV) protection factor (UPF) values ranged between good and excellent for the silk fabric. In addition, a darker colour, such as that provided by a FeSO₄ mordant, gave better protection because of higher UV absorption. A silk fabric dyed in a solution containing the eucalyptus leaf extract showed a shade of pale yellowish‐brown. The exception was when the fabric was dyed with the FeSO₄ mordant, resulting in a shade of dark greyish‐brown. The colour fastness to washing and rubbing of the silk fabrics treated with the mordant after dyeing was investigated and the results showed good fastness, whereas colour fastness to light was at a fair level. The results confirmed that natural dyes from eucalyptus leaf extract with metal mordants have potential applications in fabric dyeing and in producing UV‐protective silk fabrics.     

Bioactive compounds,pigments, antioxidant activity and antimicrobial activity of yellow prickly pear peels

The main goal of this research was to study the effects of pressure, extraction time and ethanol concentration on antioxidant activity, total phenolics, flavonoids, anthocyanins, carotenoids and betalains compounds extraction from yellow prickly pear peels. A Box–Behnken design and Response Surface Methodology were used to evaluate the effects and estimate the optimum extraction conditions. Antimicrobial activity was evaluated against Escherichia coli and Listeria innocua. Ethanol concentration was the variable that showed the highest effect on extraction yields but high-pressure increased extraction yields between 6% and 17%. Models showed good fitting and adequacy to the experimental data and the high correlation of models indicated that it can be employed to optimise extraction conditions. The experimental and predicted values differed <10% and the extracts inhibited the growth of both bacteria. High-pressure could be a promising extraction process to improve extraction of bioactives from prickly pear peels.     

云南草植物染料的提取及对真丝织物的媒染性能

从云南草中提取天然染料并用于真丝织物染色,并探讨其对真丝织物的染色性能.试验优化的云南草植物染料提取工艺为:80℃条件下,加入10g/L NaOH,提取4h,连续提取2次,所得到的提取液吸光度较高.该提取液用于真丝织物染色时,预媒染法更有利于染色深度和牢度的提高.     

儿茶素络合染料的制备及其对蚕丝织物的染色性能

为开发植物染料对纺织品染色的新方法,提高染色产品的色牢度,通过儿茶素与Fe²⁺的相互作用,制备了铁离子络合染料C-Fe。借助傅里叶变换红外光谱仪、紫外-可见光分光度计、扫描电镜能谱仪、X射线光电子能谱仪等手段对络合染料进行表征和分析,并考察了络合染料对蚕丝织物的染色性能。结果表明：铁离子成功与儿茶素络合,获得络合染料结构;络合染料C-Fe上染蚕丝织物的最佳工艺为染色温度90℃,pH值为4,保温续染60 min;络合染料染色的蚕丝织物耐日晒色牢度和耐摩擦色牢度均达到3级,耐汗渍色牢度和耐皂洗色牢度均在4级以上;染色后蚕丝织物的紫外线防护系数为72,显示出优异的防紫外线性能。     

樟树叶天然染料的提取及真丝绸染色

从樟树叶中提取天然染料并用于真丝绸染色,讨论了氢氧化钠浓度、提取温度、提取时间和料液比等对樟树叶天然染料提取效果的影响,以及染色pH值、染色温度、染色时间、硫酸钠用量等对真丝绸染色效果的影响.结果表明,碱性条件更有利于樟树叶中天然染料提取,其优化工艺为:氢氧化钠0.3 mol/L,提取温度100℃,提取时间80 min,料液比1:30;樟树叶提取液对真丝绸直接染色的优化工艺则为:染色pH值3.00 ～3.50,染色温度90℃,染色时间60 min,浴比50:1;染色真丝绸具有一定的牢度,媒染可适当提高染色真丝绸的染色牢度.     

天然植物指甲花对真丝织物的染色工艺研究

指甲花在真丝织物上进行染色试验，选择染色温度、染浴pH值、媒染条件进行正交试验．结果表明：指甲花用量5％。染浴pH为4，80℃染色为宜；用铝盐或铁盐作媒染剂可提高染色深度和染色牢度．     

仙人掌果红色素提取工艺及其稳定性研究

建立了海南野生仙人掌果实中红色素提取的最佳工艺条件,并对提取的红色素的稳定性进行了研究,为利用仙人掌果开发天然色素提供理论依据。红色素的提取工艺条件为:70%的乙醇溶液作为溶剂,提取温度为50℃,提取体系的料液比为1∶20,提取pH5.0,提取时间1h。稳定性实验结果表明:仙人掌果红色素在pH3～5时红色素较稳定,色素随着光照的天数、氧化剂、还原剂浓度增加稳定性变差,红色素对金属离子Na+、Mg2+较稳定,而对Zn2+、Sn2+、Fe3+、Cu2+、Pb2+较不稳定。      

Development of natural dyed jute fabric with improved colour yield and UV protection characteristics

Premordanting of jute fabric was carried out following single mordanting by biomordants (myrobolan and pomegranate) and ecofriendly chemical mordants (ferrous sulphate and potash alum) and double mordanting by sequential treatment of biomordant and ecofriendly chemical mordant. Extraction condition of natural dyes from manjistha, annatto, ratanjot and babool was standardised and applied on premordanted jute fabric. There is a substantial improvement of colour yield, levelness of dyeing and wash fastness properties of natural dyed jute fabric after double premordanting using bio and chemical mordant. Light fastness ratings are moderate to good while rubbing fastness are very good to excellent for all the natural dyed jute fabric. Very good ultraviolet (UV) protection ratings are achieved in case of dyeing of jute fabric using natural dyes extracted from manjistha, annatto, ratanjot and babool after premordanting with sequential treatment of biomordant and chemical mordant. UV protection properties of natural dyed jute fabric follows the order babool?>?annatto?>?manjistha?>?ratanjot.     

天然栀子黄染色棉织物的防紫外和抗菌性能

利用天然栀子黄对壳聚糖改性棉织物进行染色,研究了时间、栀子黄用量、pH和温度对染色棉织物K/S值的影响,并研究了栀子黄染色壳聚糖改性棉织物的色牢度、防紫外和抗菌性能.结果 表明壳聚糖改性实现了棉织物纤维的阳离子化;栀子黄染色壳聚糖改性棉织物的优化工艺:栀子黄用量8％,pH 5,60 min,40℃;栀子黄染色壳聚糖改性...     

Comparison of effects of prickly pear (Opuntia ficus indica sp) fruit,arabic gum,carrageenan, alginic acid,locust bean gum and citrus pectin on viscosity and in vitro digestibility of casein

The consumption of high levels of fibres can induce a decrease in both food digestibility and nutrient availability. Prickly pear is a pectin‐rich fruit and it is possible to use it to decrease plasma cholesterol levels. Its effect on food digestibility deserves attention. This effect was determined by using a mixture of a constant quantity of casein and an increasing quantity (10, 20, 25% of the casein) of prickly pear pulp, skin and seed. In parallel, the effect of similar mixtures of carrageenan, gum arabic, locust bean gum, alginic acid and citrus pectin with casein was also studied. The flow behaviour of the different mixtures was determined and their digestibilities were measured using an in vitro digestion cell device. The apparent viscosities of the mixtures with prickly pear components and gum arabic were similar. The nature and level of fibres in the diet modified nitrogen release in the in vitro digestion cell model. The pulp of the prickly pear decreased the digestibility of the casein‐based diet to a greater extent than the other soluble fibres, whatever the percentage used. The results suggest that the decrease in N release in the digestion cell model is due to the interaction of the fibres with the enzymes or casein rather than to the apparent viscosity of the mixtures. © 2000 Society of Chemical Industry     

桑椹天然染料的稳定性及其对丝织物媒染染色

针对桑椹染料对丝织物染色亲和力低、色牢度差的问题,为最大程度表现桑椹染料颜色特点,选择合理的桑椹染料染色工艺参数、媒染工艺对丝织物进行染色.通过测试桑椹染液的可见吸收光谱、染色织物色度(K/S值)及染色牢度来探讨桑椹天然染料的颜色稳定性及其对丝织物的媒染效果.研究结果显示:桑椹染液在pH值为4以下、温度为80℃以下表现...