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The controlling effect for dye exhaustion (adsorption) and diffusion (absorption) in a reactive dyeing of cotton is shown to be exerted by ionic strength in the dye solution rather than concentration of inorganic salts used as electrolytes. The study showed that the conclusion applies to both exhaust dyeing for dye exhaustion and pad dyeings for dye diffusion. Further, the addition of an alkali, even though it is not used as an electrolyte, increased the extent of exhaustion (in exhaust dyeing) and diffusion (in pad dyeing) due to increase in ionic strength of the dye solution. Hence, the total ionic strength of reactive dye solution for dye exhaustion and diffusion must be taken into account in order to ensure optimum reproducibility. Means for determining the total ionic strength of exhaust or pad dye solutions for different electrolytes are given. 相似文献
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Wensheng Hou Chen Ling Sheng Shi Zhifeng Yan Meiling Zhang Bonan Zhang Jinming Dai 《Fibers and Polymers》2018,19(4):742-750
In the study, a good separation efficiency of waste cotton/polyester blended fabrics (WBFs) was achieved, with dilute hydrochloric acid as the catalyst under hydrothermal conditions. The morphology and structure of the hydrothermal products including solid and liquid products were characterized by scanning electron microscopy, Fourier transform Infrared spectroscopy, X-ray diffraction, and high-performance liquid chromatography techniques and compared to the untreated polyester and cotton. The results show that the cotton fiber decomposed completely while polyester still retained its fiber characteristics after 3 h of reaction time at 150 oC and 1.5 wt% dilute hydrochloric acid. The hydrolysis of cellulose resulted in a recovery of 96.24 % of the polyester without significant change in its properties; 48.21 % of cellulose powder can be further used as the raw material of microcrystalline cellulose (MCC) and 15.57 % of glucose. 相似文献
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高支苎麻织物活性染料染色工艺研究 总被引:1,自引:0,他引:1
依照苎麻纤维的结构特点,结合生产实际,探讨了高支苎麻织物用活性染料染色的工艺条件,包括活性染料的选择、碱剂的选择、中性盐的选择、染色温度、染色时间等对织物染色的影响,确定了高支苎麻织物活性染料大生产的最佳工艺及其染色设备. 相似文献
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Tong Mu Nengyu Pan Yingfeng Wang Xuehong Ren Tung-Shi Huang 《Fibers and Polymers》2018,19(11):2284-2289
In this study, we synthesized a novel N-halamine precursor, sulfuric acid mono-[2-(4-[4-chloro-6-(2-[4,4- dimethyl-2,5-dioxo-imidazolidin-1-yl]-ethylamino)-[1,3,5]triazin-2-ylamino]-benzenesulfonyl)-ethyl] ester sodium (TB), which contains two reactive groups of monochloro triazine reactive groups and bis-sulphatoethylsolphone reactive groups. The structure of TB is similar to iso-bifunctional group reactive dyes and could be coated on cotton fabrics by covalent bonds through a reactive dyeing process. The cotton coated with TB was characterized by FTIR and SEM. After chlorination, the treated cotton fabrics showed excellent antibacterial efficacy and inactivated all inoculated S. aureus (ATCC 6538) and E. coli O157: H7 (ATCC 43895) within 1 min of contact. Over 85 % of tensile strength retained both in warp and weft directions after treatment and chlorination. Almost 80 % of active chlorine can be regained by treating with household bleach after extensive washing and long time storage. 相似文献
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Maryam Akbari Hessam Jafari Mojtaba Rostami Gholam Reza Mahdavinia Ali Sobhani nasab Dmitry Tsurkan Iaroslav Petrenko Mohammad Reza Ganjali Mehdi Rahimi-Nasrabadi Hermann Ehrlich 《Marine drugs》2021,19(9)
The renewable, proteinaceous, marine biopolymer spongin is yet the focus of modern research. The preparation of a magnetic three-dimensional (3D) spongin scaffold with nano-sized Fe3O4 cores is reported here for the first time. The formation of this magnetic spongin–Fe3O4 composite was characterized by X-ray diffraction (XRD), thermogravimetric analysis (TGA), differential thermal analysis (DTA) (TGA-DTA), vibrating sample magnetometer (VSM), Fourier-transform infrared spectroscopy (FTIR), and zeta potential analyses. Field emission scanning electron microscopy (FE-SEM) confirmed the formation of well-dispersed spherical nanoparticles tightly bound to the spongin scaffold. The magnetic spongin–Fe3O4 composite showed significant removal efficiency for two cationic dyes (i.e., crystal violet (CV) and methylene blue (MB)). Adsorption experiments revealed that the prepared material is a fast, high-capacity (77 mg/g), yet selective adsorbent for MB. This behavior was attributed to the creation of strong electrostatic interactions between the spongin–Fe3O4 and MB or CV, which was reflected by adsorption mechanism evaluations. The adsorption of MB and CV was found to be a function of pH, with maximum removal performance being observed over a wide pH range (pH = 5.5–11). In this work, we combined Fe3O4 nanoparticles and spongin scaffold properties into one unique composite, named magnetic spongin scaffold, in our attempt to create a sustainable absorbent for organic wastewater treatment. The appropriative mechanism of adsorption of the cationic dyes on a magnetic 3D spongin scaffold is proposed. Removal of organic dyes and other contaminants is essential to ensure healthy water and prevent various diseases. On the other hand, in many cases, dyes are used as models to demonstrate the adsorption properties of nanostructures. Due to the good absorption properties of magnetic spongin, it can be proposed as a green and uncomplicated adsorbent for the removal of different organic contaminants and, furthermore, as a carrier in drug delivery applications. 相似文献
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黄麻/棉织物服用性能探讨 总被引:3,自引:1,他引:3
本文通过试验测定了黄麻/棉织物的服用性能,并与苎麻/棉,涤/棉,纯棉等织物的服用性能进行比较,结论表明黄麻/棉织物作为服用织物是可行的。 相似文献
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A series of five azo acid dyes were synthesized using different diazotized aromatic amine sulfonic and carboxylic acids followed by coupling with 2H-pyrido[1,2-a]pyrimidine-2,4(3H)-dione. The dyes were characterized by 1H-NMR, 13CNMR, FTIR, and elemental analysis. They were applied on nylon, silk, and wool. Their fastness properties were evaluated and color on the fabric was assessed. Yellow, brown, and crimson dyeings with good fastness properties were obtained. The dyes are water soluble and showed absorption from 380 nm to 550 nm. Acid dyes from diazo component 4- aminonaphthalene-1-sulfonic acid (naphthionic acid) and 4-amino-5-hydroxynaphthalene-2,7-disulfonic acid (H-Acid) were found to be more red shifted as compared to the other dyes. More red shifted absorption maximum was observed in acidic pH than in alkaline pH. The trends in vertical excitations obtained from Time Dependent Density Functional Theory calculations are in good agreement with the experimental absorptions. 相似文献
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将Sirofil纺纱方法应用于苎麻/涤纶混纺,开发了苎麻/涤纶Sirofil织物.基于FAST、KES客观评价系统以及织物的基本物理指标的测试结果,对设计的织物的性能和风格进行了讨论和评价. 相似文献
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苎麻/涤Sirofil织物性能及品质研究 总被引:4,自引:0,他引:4
将Sirofil纺纱方法应用于苎麻/涤纶混纺,开发了苎麻/涤纶Sirofil织物。基于FAST、KES客观评价系统以及织物的基本物理指标的测试结果,对设计的织物的性能和风格进行了讨论和评价。 相似文献
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混纺比对麻涤纱线性能的影响 总被引:2,自引:0,他引:2
本文通过对不同混纺比下的麻涤混纺纱的性能测试分析得出:涤纶比例必须达到一定量(40%)后,混纺纱的断裂伸长率才能随着涤纶比列的提高而逐渐改善;随着混纺比的改变,在涤纶含量为50%左右,混纺纱的断裂强力将出现一个低谷;随着涤纶含量的增加,毛羽和条干指标得以改善。 相似文献
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基于已有的特征指标及组合指标,对苎麻和涤纶纤维的各特征指标进行“组合对”识别与分类及其边界确定。利用“组合对”参数二维解析边界函数划分和判定方法,实现了计算机图像处理对麻/涤混纺纱混合比的精确、有效地计算,混纺比与实际比较绝对误差在3%以下,相对误差在5%以下。研究表明本文提供的方法更具有纤维识别的直观准确性和有效性,并可实用和标准化。 相似文献
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Dimethylaminopropyl methacrylamide (DMAPMA) was grafted onto PET/wool blend fabrics by continuous UV irradiation. Union dyeing
of the photografted fabrics was investigated using three reactive dyes of α-bromoacrylamide reactive groups. The influence of grafting yield, DMAPMA concentration, NaCl amount, pH value, and dyeing
temperature on the dyeability was evaluated. The dyeability of both PET and wool components was improved significantly by
the DMAPMA photografting and successive reactive dyeing. Although the dyeability of the PET component in the blend substantially
was improved with higher grafting, equal dyeability between PET and wool was difficult to achieve due to more facile grafting
and higher reactivity of the wool component compared with the modified PET component. However, the color fastness of the PET/wool
blend fabric was excellent for all three colors. This study may offer a way to achieve union dyeing of PET/wool blend fabrics. 相似文献
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Siyamak Safapour Mousa Sadeghi-Kiakhani Solmaz Eshaghloo-Galugahi 《Fibers and Polymers》2018,19(7):1428-1434
Fruits obtained from shrubs of the Crataegus elbursensis (C. elbursensis) plant demonstrate significant antioxidant and antibacterial properties. In this study, natural dye was sono-extracted from fresh and dried fruits and applied in dyeing and antibacterial finishing of wool. The maximum sono-extraction yield was obtained when optimal conditions of ethanol/ water (4/1 v/v) as extracting solvent, time 30 min, pH 4, temperature 50 oC, and C. elbursensis concentration 10 g/l were used. When wool yarns were dyed with the extracted natural dye, the maximum dye uptake was achieved using dye concentration 75 % owf, and dyeing condition of 100 oC, 60 min, pH 4, and LR 100:1. Different metal salts like aluminum sulfate, copper sulfate, and tin chloride were applied on wool by pre-mordanting method and their effects on dye uptake, color variation, and color fastness were examined. Results showed that the natural dye itself had relatively high uptake and good color fastness on un-mordanted wool. Further, each mordant had different effect on dye uptake, color variation, and color fastness properties depending on its coordination ability with dye molecules and wool chains. Moreover, dyed yarns showed good antibacterial activity against Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus) bacteria. 相似文献
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本文通过实验测定了苎麻/黄(红)麻混纺交织织物的服用性能,并与苎麻织物的服用性能进行比较,结论表明苎麻/黄(红)麻混纺交织织物具有良好的服用性能. 相似文献
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苎麻/黄(红)麻织物服用性能测试分析 总被引:1,自引:0,他引:1
本文通过实验测定了苎麻/黄(红)麻混纺交织织物的服用性能,并与苎麻织物的服用性能进行比较,结论表明苎麻/黄(红)麻混纺交织织物具有良好的服用性能。 相似文献
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通过对长短纤维纺纱的工艺路线及关键工序的生产技术进行研究和创新,在苎麻粗纱机上将涤/棉短纤维条与麻/维长纤维条进行复合,纺出60Nm麻/维/涤/棉长短纤维复合纱。织造成坯布后,经过染整的退维处理,再利用涤纶与麻、棉染色性能不同的原理,研究、探索了面料的染色工艺及相关的技术措施,最终研发出具有色纺、色织效果的72Nm苎麻/涤/棉长短纤维多彩复合面料。 相似文献