scholarly journals Photochemical Stability of a Cotton Fabric Surface Dyed with a Reactive Triphenodioxazine Dye

Polymers ◽  
2021 ◽  
Vol 13 (22) ◽  
pp. 3986
Author(s):  
Liliana Rosu ◽  
Cristian-Catalin Gavat ◽  
Dan Rosu ◽  
Cristian-Dragos Varganici ◽  
Fanica Mustata
Keyword(s):  
Cotton Fabric ◽  
Near Infrared ◽  
Chemical Imaging ◽  
Color Strength ◽  
Structural Modifications ◽  
Before And After ◽  
Photodegradation Products ◽  
Photochemical Stability ◽  
Dyed Fabric ◽  
Fabric Surface

The paper describes the photochemical stability of a commercial triphenodioxazine dye (Reactive Blue_204) linked onto a cotton fabric. Preliminary studies have shown that as a result of irradiation, the dye and its photodegradation products can pass directly onto the skin under conditions that mimic human perspiration and cause side-effects. The cotton dyed fabric was photo irradiated at different time intervals. Standard methods were employed to evaluate the color strength at various levels of pH, temperature, dyeing contact time, and salt concentration. The influence of UV radiation at different doses (λ > 300 nm) on the structural and color modifications of the dyed cotton fabrics was studied. Structural modifications before and after irradiation were compared by applying FTIR, UV–Vis, and near infrared chemical imaging (NIR–CI) techniques. Color modifications were investigated with the CIELAB system. Color differences significantly increased with the irradiation dose. High irradiation doses caused changes in the dye structure.

Influence of fluorescent dyes for dyeing of regenerated cellulose fabric

2019 ◽  
Vol 90 (11-12) ◽  
pp. 1385-1395
Author(s):  
Hao Liu ◽  
Minglei Lu ◽  
Fukui Pan ◽  
Xin Ning ◽  
Jinfa Ming
Keyword(s):  
Fluorescence Intensity ◽  
Fluorescent Dyes ◽  
Fiber Surface ◽  
Cellulose Fiber ◽  
Regenerated Cellulose ◽  
Fluorescent Properties ◽  
Color Strength ◽  
Knitted Fabrics ◽  
Before And After ◽  
Dyed Fabric

This study attempted to dye regenerated cellulose fiber fabric with fluorescent dyes in different conditions (dyeing time, temperature, pH, concentration, etc.) and investigated their effects on color strength, fluorescence intensity, and other properties of dyed fabrics. The exhaust dyeing method was applied in this experiment for cellulose based knitted fabrics. The physical properties of dyed knitted fabrics before and after treatment with fluorescent dyes were determined and evaluated. After fluorescent staining, the results showed that a large number of granular fluorescent particles were coated on the fiber surface. Higher K/ S values were obtained under conditions of a dyeing temperature of 80℃, dyeing time of 30 min, and NaCl concentration of 1 wt% than other conditions. Moreover, the fluorescence intensity of the dyed fabric was also highest at 80℃. The color strength and bursting strength of dyed knitted fabrics were increased with the increase of the concentration of fluorescein sodium. Thus, cellulose based knitted fabric dyed with fluorescent dyes exhibited excellent fluorescent properties and could be used in fluorescent clothing.

scholarly journals Experimental Study on Dyeing Performance and Antibacterial Activity of Silver Nanoparticle-Immobilized Cotton Woven Fabric

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Imana Shahrin Tania ◽  
Mohammad Ali ◽  
Riyadh Hossen Bhuiyan
Keyword(s):  
Antibacterial Activity ◽  
Silver Nanoparticle ◽  
Woven Fabric ◽  
X Ray Diffraction ◽  
Color Strength ◽  
Nanoparticle Deposition ◽  
Dyeing Performance ◽  
Dyed Fabrics ◽  
Dyed Fabric ◽  
Fabric Surface

AbstractThe purposes of the current research were to deposit the silver nanoparticles on the surface of a textile woven fabric and evaluate their dyeing performance and antibacterial activity. The synthesis of silver nanoparticle (Ag°) is done by the in situ method. Strong alkali is used to improve functionality of cellulose before the application of silver nitrate salt (AgNO3). The silver nanoparticle is formed by reduction of ascorbic acid. Various instrumental analyses are done to prove the formation of nanoparticles on the fabric surface. The morphology of nanodeposited fabric is characterized by using scanning electron microscope (SEM), elemental composition is done by energy dispersive spectroscopy, and crystallinity of nanoparticles is obtained by X-ray diffraction (XRD). Nanodeposited fabric is then dyed with direct dyestuff (Direct Red-89). Fourier transform infrared spectroscopy analysis is done to explore the bonding phenomena of un-dyed and dyed fabrics. The dyeing performance and antibacterial activity are examined on the colored fabric to investigate the dyed fabric quality after nanoparticle deposition. Results demonstrate the improvement of 54% of color strength and 11% of dye exhaustion with excellent antibacterial activity.

scholarly journals Investigations into the Sequential Application of Crease Resist Finish, Tannin and Cationic Reactant to Improve the Resistance of Sulphur Dyes to Oxidation

2019 ◽  
Vol 38 (2) ◽  
pp. 421-434 ◽  
Author(s):  
Quratulain Mohtashim ◽  
Muriel Rigout
Keyword(s):  
Tensile Strength ◽  
Cotton Fabric ◽  
Choline Chloride ◽  
Color Strength ◽  
Economical Method ◽  
Wash Fastness ◽  
Dyed Fabric

The importance of sulphur dyes are realized due to the fact that they offer an economical method of achieving dyeing of good color strength and acceptable fastness on cellulosic substrates. However, the main limitations associated with this class of dye are the lack of availability of bright colors and it’s fading on exposure to laundering with detergent and perborates/peroxides formulations. In order to meet the growing requirements of customers regarding the higher wash fastness, garment traders are in turn demanding their suppliers to achieve these properties against single and multiple washes. In this study, sulphur black 1 dyed cotton fabric has been aftertreated with Fixapret CP, Bayprotect Cl and CC (Choline Chloride) with various sequential combinations to improve the wash fastnesss of the dyed fabric against the aggressive ISO-1O5 CO9 washing system. Sequential application of Bayprotect Cl followed by CC was found to offer a significant improvement causing a 12% reduction in percentage colour loss relating to the untreated fabric, which was comparable to the independent application of Fixapret CP with minimum deleterious effects on the hue, chroma and tensile strength of the fabric.

scholarly journals Development and characterization of conductive textile (cotton) for wearable electronics and soft robotic applications

2020 ◽  
Vol 90 (15-16) ◽  
pp. 1792-1804
Author(s):  
Zuhaib Hassan ◽  
Fatma Kalaoglu ◽  
Ozgur Atalay
Keyword(s):  
Cotton Fabric ◽  
Cotton Fabrics ◽  
Metal Coating ◽  
Wearable Electronics ◽  
Before And After ◽  
Coating Method ◽  
Yarn Count ◽  
Finer Yarn ◽  
Conductive Textile ◽  
Fabric Surface

This study aims to manufacture and characterize various types of conductive cotton fabrics through the copper metal coating approach. Thus, we selected nine-combed cotton knitted fabrics with different yarn fineness and elastane percentage in order to see the effect of these parameters on conductivity and physical properties of the samples. We also explored the surface morphology of all the knitted cotton fabric samples before and after the coating method via scanning electron microscopy (SEM), which showed a remarkably uniform deposition of copper on the fabric surface, and performed SEM-energy-dispersive X-ray spectroscopy to determine the coated material content on the surface of the fabric after the metal coating process. The results revealed that knitted cotton fabric of 5% elastane with the finer yarn count (Ne = 40/1) showed excellent conductivity compared to the other knitted cotton fabric of 10% elastane with a finer count (Ne = 40/1) or coarser 5% elastane (Ne = 30/1). Therefore, the knitted cotton fabrics of 5% elastane having the finer count (Ne = 40/1) can be considered a suitable candidate for e-textile applications.

Application of K/S Value in Determination of Fixation Rate

2014 ◽  
Vol 1048 ◽  
pp. 116-119 ◽  
Author(s):  
Hai Yan Zhang
Keyword(s):  
Linear Relationship ◽  
Cotton Fabric ◽  
Reactive Dyes ◽  
Surface Measurement ◽  
Fixation Rate ◽  
Washing Method ◽  
Dyed Fabric ◽  
Fabric Surface ◽  
The Relationship

K/S value is an important parameter of modern colorimetry, which can indicate the depth of the color of dyed fabric surface. Measurement of K/S value is easily and simple operation in the applied engineering. Take Reactive Blue B-2GLN as examples in this paper, the relationship between K/S value and the fixing rate with the reactive dyes on cotton fabric was studied. And the feasibility of K/S value instead of the traditional washing method for the determination of reactive dyes fixation rate was also studied. The results show that: the K/S value of the fabric has good linear relationship to the reactive dyes fixation rate by the washing method and the reactive dyes fixation rate can be get from the K/S correction value.

scholarly journals Ecofriendly dyeing of microwave treated cotton fabric using reactive violet H3R

2018 ◽  
Vol 21 (1) ◽  
pp. 43-47 ◽  
Keyword(s):  
Microwave Irradiation ◽  
Cotton Fabric ◽  
Color Change ◽  
Fastness Properties ◽  
Color Strength ◽  
Textile Processing ◽  
Mild Conditions ◽  
Colour Strength ◽  
Before And After ◽  
Dyeing Parameters

<p>The urge of environmental friendly techniques in textile processing is gaining much attention due to high risks of effluent load causing eco-imbalance. For the present study, the cotton fabric and Reactive Violet H3R dye solution were treated with microwave radiation for 2, 4, 6, 8 &amp; 10 min. at different powers (low, medium &amp; high). Dyeing was performed using un-irradiated (NRC) and irradiated cotton (RC) with un-irradiated (NRS) and irradiated dye solution (RS). Different dyeing parameters were optimized and ISO standard methods for color fastness were employed to rate the color change before and after irradiation. It is found that microwave irradiation for 8 min. at high power has given good colour strength. When 60 mL irradiated dye solution of 7.5pH containing 8g/L of salt as exhausting agent is used to dye irradiated fabric at 60<sup>o</sup>C for 55 min. ISO standards for colorfastness employed at various shades have shown that microwave irradiation has improved the rating of fastness properties. It is concluded that microwave irradiation has a promising potential to improve the color strength and dyeing properties under mild conditions.</p>

scholarly journals Established an eco-friendly cotton fabric treating process with enhancing anti-wrinkle performance

2021 ◽  
Vol 16 ◽  
pp. 155892502110034
Author(s):  
Xiongfang Luo ◽  
Pei Cheng ◽  
Wencong Wang ◽  
Jiajia Fu ◽  
Weidong Gao
Keyword(s):  
Tensile Strength ◽  
Citric Acid ◽  
Cotton Fabric ◽  
Crosslinking Agent ◽  
Cost Effective ◽  
Waterborne Polyurethane ◽  
Cotton Fabrics ◽  
Wrinkle Resistance ◽  
Before And After ◽  
Strength Retention

This study establishes an eco-friendly anti-wrinkle treating process for cotton fabric. Sodium hydroxide-liquid ammonia pretreatment followed by 6% (w/w) PU100 adding citric acid pad-cure-dry finishing. In this process, citric acid (CA) was used as the fundamental crosslinking agent during finishing because it is a non-formaldehyde based, cost-effective and well wrinkle resistance agent. Environmental-friendly waterborne polyurethane (WPU) was used as an additive to add to the CA finishing solution. Six commercial WPUs were systematically investigated. Fabric properties like wrinkle resistance, tensile strength retention, whiteness, durable press, softness, and wettability were well investigated. Fourier transform infrared spectra and X-ray diffraction spectra were also measured and discussed before and after adding waterborne polyurethane. Tentative mechanism of the interaction among the WPU, CA, and modified cotton fabrics is provided. The effect of cotton fabric pretreatment on fabric performance was also investigated. After the eco-process’s treatment, the fabric wrinkle resistant angle was upgraded to 271 ± 7°, tensile strength retention was maintained at 66.77% ± 3.50% and CIE whiteness was elevated to 52.13 ± 3.21, which are much better than the traditional CA anti-wrinkle finishing based on mercerized cotton fabrics. This study provides useful information for textile researchers and engineers.

Optimisation of Magnification Levels for near Infrared Chemical Imaging of Blending of Pharmaceutical Powders

2007 ◽  
Vol 15 (3) ◽  
pp. 137-151 ◽  
Author(s):  
Hua Ma ◽  
Carl A. Anderson
Keyword(s):  
Near Infrared ◽  
Image Data ◽  
Principal Component ◽  
Chemical Imaging ◽  
Field Of View ◽  
Pharmaceutical Dosage Forms ◽  
Component Distribution ◽  
Circular Field ◽  
Pharmaceutical Powder ◽  
Magnification Level

A critical parameter in the evaluation of pharmaceutical dosage forms by hyperspectral imaging is the level of magnification. If the magnification (as set by the optical objective) is inadequate to resolve the relevant features, then the value of the imaging is diminished; if the magnification level is greater than is required, then the field of view is unnecessarily reduced. The purpose of this study was to determine an optimum magnification level for the study of powder mixing. Relevant features in this system include distribution of individual components within samples and the overall content of a given sample. In the present study, three magnification levels of near infrared (NIR) chemical imaging objectives were evaluated for their effects on imaging a blend of pharmaceutical materials (powders). High, medium and low objective magnification levels were investigated by comparing the resulting blend surface images of a two-component (salicylic acid and lactose) pharmaceutical powder mixture. Multiple images from high and medium magnification were concatenated so that an equivalent field of view was obtained for all magnification levels. Univariate images, principal component analysis score images, partial least squares predicted images and spectra extracted from different intensity regions in the area images were analysed qualitatively and quantitatively for comparison. A series of images spanning a strip across the centre of the circular field were collected at each magnification level and compared with respect to surface features elucidated and area of blend surface imaged. Analyses of images indicate that the three magnification levels delineate the component distribution for this particular powder system similarly. Images obtained at the low magnification level demonstrated adequate resolution and provided the broadest view of the blend surface. It is concluded that the low optical magnification level was adequate for the system being studied and is the preferred mode for pharmaceutical powder blend image data collection for this system.

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