Modification of Polyester Textiles for Easier Dyeing with Disperse Dyes

2020 ◽  
Vol 7 (5) ◽  
pp. 9-16
Author(s):  
Marija Kodric ◽  
Dragan Djordjevic
Keyword(s):  
Differential Scanning Calorimetry ◽  
Polyester Fabric ◽  
Disperse Dyes ◽  
Disperse Dye ◽  
Primary Alcohols ◽  
Scanning Calorimetry ◽  
Absorption Properties ◽  
Fiber Modification ◽  
Polyester Fibers ◽  
Polyester Dyeing

Modification of polyester fibers for more economical dyeing at lower temperatures without a carrier are considered in this study. Polyester dyeing is carried out industrially under rigorous conditions at high temperatures and under increased air pressure, and are treated with various solvents (primary alcohols) to make the fibers more permeable. As a result, the sorption properties, as well as the disperse dye dyeing ability, are improved. Dyeing of a modified polyester fabric at lower temperatures yielded better results than the standard dyeing of the unmodified polyester under the same conditions. The effects of fiber modification were analyzed through water absorption properties, wetting, swelling, differential scanning calorimetry (DSC), and Fourier transform infrared (FTIR) methods, and the degree of dyeing of the fabric was evaluated using CIELab parameters.

scholarly journals Influence of dispersing agents on adsorption and desorption rate of a disperse dye on polyester

2020 ◽  
Vol 6 (5) ◽  
Author(s):  
Md. Koushic Uddin ◽  
Sonia Hossain ◽  
Umma Habiba ◽  
Md Nafiur Rahman ◽  
Rayhan Mahmud
Keyword(s):  
Transfer Rate ◽  
Polyester Fabric ◽  
Disperse Dyes ◽  
Disperse Dye ◽  
Desorption Rate ◽  
Dye Transfer ◽  
Adsorption And Desorption ◽  
Bath Concentration ◽  
Polyester Dyeing ◽  
Dispersing Agents

Dispersing agents play important roles in polyester dyeing with disperse dyes. The purpose of this work is to determine the influence of dispersing agents on the adsorption and desorption rate of polyester dyeing with CI Disperse Blue 284. Polyester fabric was dyed at HTHP method using two types of dispersing agents at different concentrations. The performances studied were the changes in dye transfer rate, K/S values of the dyed samples and dye bath concentration. The rate of adsorption and desorption of disperse dyes were affected significantly not only by the type but also the concentration of dispersing agents.

scholarly journals Modelling of polyester fabric dyeing in the presence of ultrasonic waves

2017 ◽  
Vol 23 (1) ◽  
pp. 131-139 ◽  
Author(s):  
Marija Kodric ◽  
Sandra Stojanovic ◽  
Branka Markovic ◽  
Dragan Djordjevic
Keyword(s):  
Polyester Fabric ◽  
Ultrasonic Waves ◽  
Disperse Dyes ◽  
Disperse Dye ◽  
Precise Description ◽  
Additional Energy ◽  
Initial Concentration ◽  
Dyeing Process ◽  
Pseudo Second Order ◽  
Polyester Dyeing

In this paper, modelling of dyeing, i.e. adsorptive behaviour of disperse dyes on polyester fibres (dyeing), under the influence of ultrasound has been considered with the aim of getting the data about mechanisms of binding the dyes and defining the conditions of dyeing process of this synthetic fibres along with additional energy source without the use of carriers, compounds that increase permeability of the fibres and help dyeing. Dyeing - adsorption is conducted under different conditions, and the concentration of dyes, mass of the substrate, recipes and time of dyeing were being varied. It has been established that ultrasound allows dyeing without carriers and the efficiency of dyeing depends on the time of contact, initial concentration of the dye and the amount of absorbent - material. There is the continuity of growth of the amount of bound dye to the mass of the absorbent. Characteristic graphs, obtained from Langmuir isotherm, have confirmed that this model ensures precise description of polyester dyeing by disperse dye. Kinetic of dyeing has been remarkably interpreted by pseudo second-order in regards to the high functionality.

scholarly journals Study on the improvement of hydrophilic character on polyvinylalcohol treated polyester fabric

2014 ◽  
Vol 16 (4) ◽  
pp. 21-27
Author(s):  
Pitchai S. ◽  
Jeyakodi Moses J. ◽  
Swarna Natarajan
Keyword(s):  
Differential Scanning Calorimetry ◽  
Electron Microscope ◽  
Water Retention ◽  
Polyester Fabric ◽  
Spot Test ◽  
Disperse Dye ◽  
Scanning Calorimetry ◽  
Pet Fabric ◽  
Hydrophilic Character ◽  
Scanning Electron

Abstract Polyester fabric was treated with polyvinyl alcohol in alkaline medium. The moisture regain, water retention and wettability of the PVA treated polyester fabric were tested. The PVA treated PET fabric was dyed with disperse dye. The presence of PVA in the treated PET fabric was assessed by spot test. The treated fabric was also characterized by scanning electron microscope, FTIR and differential scanning calorimetry. The PVA treated polyester fabric showed improved hydrophilic character over intact and sodium hydroxide treated PET fabrics.

scholarly journals Review on Intermolecular Forces between Dyes Used for Polyester Dyeing and Polyester Fiber

2020 ◽  
Vol 2020 ◽  
pp. 1-7
Author(s):  
Asnake Ketema ◽  
Amare Worku
Keyword(s):  
Terephthalic Acid ◽  
Van Der Waals ◽  
Intermolecular Forces ◽  
Polyester Fabric ◽  
Polyester Fiber ◽  
Disperse Dyes ◽  
Oh Groups ◽  
Poly Ethylene Terephthalate ◽  
Poly Ethylene ◽  
Polyester Dyeing

Polyester fiber is a manufactured fiber composed of synthetic linear macromolecules in the chain at least 85% by mass of an ester of diol and benzene-1, 4-dicarboxylic acid (terephthalic acid). Fibers of the most common polyester, poly(ethylene terephthalate) (PET or PET), are generally made from either terephthalic acid or dimethyl terephthalate together with ethylene glycol. Dyeing of polyester fabric with disperse dyes, polyester requires the use of dispersing agents. The chemical characteristics and general application conditions of disperse dyes are characterized by the absence of solubilizing groups and low molecular weight. Dye particles have a size ranging from 0.5 to 2.0 microns, generally contain –NH2, substituted –NH2, or –OH groups in the structure, and get attached with the fiber through H-bond and van der Waals force. Dyes are retained by the fiber by physical forces. Fastness properties are very high in polyester except in certain cases. The dye-fiber (PET) affinity is the result of different types of interactions, such as hydrogen bonds, dipole-dipole interactions, and van der Waals forces.

Ultralow emission micro-printing process for PET fibers using liquid disperse dye

2021 ◽  
pp. 004051752110457
Author(s):  
Li Ai ◽  
Hongmei Cao ◽  
Yawei Zhu
Keyword(s):  
Polyester Fabric ◽  
Disperse Dyes ◽  
Disperse Dye ◽  
Color Fastness ◽  
Dye Uptake ◽  
Printing Process ◽  
Pet Fibers ◽  
Color Depth ◽  
Excellent Color ◽  
Freshwater Consumption

The commercial powder disperse dye used for printing polyester fabrics exhibits many environmentally-unfriendly properties, especially the associated high wastewater emission. In this study, three kinds of liquid disperse dyes (C.I. Disperse Blue 291:1, (L-DB); C.I. Disperse Red 179, (L-DR), and C.I. Disperse Orange 30, (L-DO)), two kinds of binders (A and/or B), and a micro-printing process, were applied to polyester fabric, with the goal of reducing freshwater consumption while maintaining color fastness. The influences of rheological and printing performance and color fastness were studied. Home-made liquid dyes of L-DB, L-DR and L-DO were found to exhibit higher color depth, excellent color fastness, and ultralow emission of wastewater and waste residual during the micro-printing process. The binder comprised of silicone-modified polyacrylate was observed to increase dye uptake, reduce dye sublimation, and improve color fastness. The liquid dyes of L-DB, L-DR and L-DO also exhibit stable and better rheological properties, which appeared to have little effect on the viscosity of printing pastes when compared with commercial powder disperse dye of Blue 3GFL (C.I. Disperse Blue 291:1), Red 2B (C.I. Disperse Red 179) and Yellow brown S-4RL (C.I. Disperse Orange 30), respectively. Results of this micro-printing process indicated that it is an environmentally clean production technology.

scholarly journals Influence of different acids for adjusting the dyebath ph value on the dyeability of polyester knitwear dyed with disperse yellow 23

2011 ◽  
Vol 65 (3) ◽  
pp. 257-261
Author(s):  
Milena Miljkovic ◽  
Milovan Purenovic ◽  
Dragan Djordjevic ◽  
Milica Petrovic
Keyword(s):  
Acetic Acid ◽  
Oxalic Acid ◽  
Surface Structure ◽  
Ph Value ◽  
Polyester Fabric ◽  
Disperse Dye ◽  
Dyeing Process ◽  
Color Differences ◽  
Polyester Fibers ◽  
Oxalic Acids

In this paper the influence of the formic and oxalic acids, as substances for dyebath pH adjusting, on the dyeability of polyester fabric dyed with disperse dye Disperse Yellow 23 was examined. The polyester undyed knitwear samples were dyed in baths containing the acids under the same dyeing conditions. Color differences of the samples were assessed using the reflectiometry technique and expressed in terms of CIELcoordinates. The influence of the tested acids on the surface structure of dyed polyester fibers was examined using the scanning electron microscopy (SEM). It was found that the differences in obtained dyeabilities, in the presence of both formic and oxalic acid, are acceptable according to both M&S 83A and CMC (2:1) standards which was not the case with acetic acid. Therefore, acetic acid can be replaced with either formic or oxalic acid as substances for dyebath pH adjusting in the dyeing process described in this paper. SEM micrographs showed small differences in the surface structure of dyed fibers, as well as differences in the shape of undyed samples? reflectance curves in presence of the acids. Since all of the color differences were quite small, it can be concluded that the influence of formic and oxalic acids on the polyester knitwear dyeability is not significantly different than that of acetic acid.

scholarly journals Dyeing of polyester fibers with sulfur- and nitrogen-containing anthraquinone derivatives

2021 ◽  
pp. 15-15
Author(s):  
Nahide Deniz ◽  
Cigdem Sayil ◽  
Erhan Oner ◽  
Onur Atak ◽  
Maryna Stasevych
Keyword(s):  
Color Change ◽  
Analysis Data ◽  
Polyester Fabric ◽  
Disperse Dyes ◽  
Elemental Analysis Data ◽  
Test Results ◽  
Light Fastness ◽  
Polyester Fibers ◽  
Anthraquinone Derivatives ◽  
Exhaustion Method

A series of disperse dyes, 9,10-anthraquinone containing dithiocarbamate, thiourea and triazole fragments, were prepared via consecutive refunctionalization of aminoanthraquinones in our previous studies and their structures were confirmed by the 1H, 13C NMR, IR spectra, LC-MS and elemental analysis data. The obtained compounds were applied on polyester fabrics by the exhaustion method at 130?C at pH 4.0-5.0, and their dyeing properties were evaluated by color measurements, the washing fastness test and the light fastness test. Many of these dyes gave solid and level dyeings on polyester fabric with low % concentration of dye. The dyed samples displayed very good color fastnesses. The color change and staining test results were quite good with ratings of ?4-5? or above. The light fastness test results were also satisfactory for the most of the dyed samples.

scholarly journals Thermodynamic investigation of disperse dyes sorption on polyester fibers

2020 ◽  
Vol 9 (2) ◽  
pp. 41-47
Author(s):  
Marija Kodrić ◽  
Arianit Reka ◽  
Čedomir Dimić ◽  
Anita Tarbuk ◽  
Dragan Đorđević
Keyword(s):  
Thermodynamic Parameters ◽  
Batch Process ◽  
Disperse Dyes ◽  
Disperse Dye ◽  
Thermodynamic Investigation ◽  
Method Of Calculation ◽  
Dyeing Process ◽  
Standard Procedures ◽  
Polyester Fibers ◽  
Thermodynamics Of Sorption

The thermodynamics of sorption during the dyeing process of raw polyester fibers with disperse dye was studied in this article. Dyeing of fibers is carried out by a discontinuous batch process, according to standard procedures with varying of the initial dye concentration and the dyeing temperature. Several of the accepted models for calculation of thermodynamic parameters were used which define and clarify the sorption of disperse dyes on polyester fibers. High functionality of variables for the calculation of basic thermodynamic parameters was determined, which confirmed the validity of the results. Depending on the method of calculation , the change of free energy during the dyeing of the polyester was negative (-10-40 kJ·mol-1), which corresponds to the spontaneous and mainly the physical process of sorption. A positive value for the change in enthalpy during dyeing (1.1×10-2-2.9×10 1 kJ·mol-1) reflects the endothermic nature of the interactions, and a relatively lower value characterizes the physisorption phenomenon. A positive value for the change in entropy (1.1×10-4-1.5×10-1 kJ·mol-1 ·K-1) confirms that it is a physical sorption.

Thermal Stability of N-Heterocycle-Stabilized Iodanes – A Systematic Investigation

2019 ◽  
Author(s):  
Andreas Boelke ◽  
Yulia A. Vlasenko ◽  
Mekhman S. Yusubov ◽  
Boris Nachtsheim ◽  
Pavel Postnikov
Keyword(s):  
Thermal Stability ◽  
Differential Scanning Calorimetry ◽  
Thermogravimetric Analysis ◽  
Systematic Investigation ◽  
Scanning Calorimetry ◽  
Thermal Stability Of

<p>The thermal stability of pseudocyclic and cyclic <i>N</i>-heterocycle-stabilized (hydroxy)aryl- and mesityl(aryl)-l<sup>3</sup>-iodanes (NHIs) through thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC) is investigated. NHIs bearing <i>N</i>-heterocycles with a high N/C-ratio such as triazoles show among the lowest descomposition temperatures and the highest decomposition energies. A comparison of NHIs with known (pseudo)cyclic benziodoxolones is made and we further correlated their thermal stability with reactivity in a model oxygenation. </p>

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