scholarly journals Thermodynamic and kinetic parameters of polyester dyeing with Disperse Blue 56 using bio-based auxiliaries and co-solvent microemulsion

2019 ◽  
Vol 90 (5-6) ◽  
pp. 523-536
Author(s):  
Shahram Radei ◽  
Francisco Javier Carrión-Fité ◽  
Mònica Ardanuy ◽  
José María Canal
Keyword(s):  
Polyester Fabric ◽  
Low Molecular Weight ◽  
Microemulsion System ◽  
Color Strength ◽  
Dyeing Process ◽  
Activated State ◽  
Kinetic Rates ◽  
Dye Absorption ◽  
Polyester Dyeing ◽  
And Diffusion

The aim of the study was to dye polyester fabric with a low molecular weight anthraquinone type disperse dye (C.I. Disperse Blue 56), with n-butylacetate as co-solvent in the microemulsion system and the presence of two bio-based auxiliaries (ortho-vanillin and coumarin), at temperatures lower than 100℃. In order to investigate the influence of temperature and auxiliaries on the kinetic dyeing process, the energy of the activation was determined by the kinetic rates constants. The activated entropy values were obtained by the theory of absolute rates of dyeing and diffusion of the activated state of the dye for the disorder state of the dyeing system. Higher activated energies were found, as well as higher activated entropy, meaning higher dye absorption, for polyester samples dyed with ortho-vanillin/n-butylacetate compared with polyester samples dyed with coumarin/n-butylacetate. Color strength values of the polyester fabric dyed using the proposed microemulsion dyeing system at low temperature (95℃) were similar to polyester fabric dyed with a conventional dyeing system at high temperature (135℃). Regarding color fastness to washing and ironing, it was found that the use of the auxiliaries did not significantly modify the fastness values of the dyed samples.

Optimization of the polyester fabric dyeing process using coumarin as a green carrier

2021 ◽  
pp. 004051752110265
Author(s):  
CN Lima ◽  
KKOS Silva ◽  
JHO Nascimento ◽  
CGFT Rossi ◽  
MA Granato ◽  
...  
Keyword(s):  
Factorial Design ◽  
Response Surface ◽  
Polyester Fabric ◽  
Interactive Effects ◽  
Color Strength ◽  
Polyester Fabrics ◽  
Dyeing Process ◽  
Center Point ◽  
Dyeing Parameters ◽  
Full Factorial

The present study aims to evaluate the application of coumarin as a green carrier alternative for dyeing of polyester fabrics, as well as to optimize key dyeing parameters in order to obtain greater color strength (K/S) at lower temperatures than 130°C using single azo class dispersed dye. For this purpose, a full-factorial design was used to study the influence of the single and interactive effects of four factors involved in the dyeing process, namely, pH, temperature, and coumarin and dye concentrations. The chosen technique was a 24-factorial, one-center point, and three replicates at the center point resulting on a response surface, which has shown an increase of the color strength of five times at 90°C, and of three times at 100°C when compared to dyeing at the same temperatures without the use of a carrier. In addition, excellent fastness to washing and to rubbing were obtained.

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.

A novel functional disperse dye doped with graphene oxide for improving antistatic properties of polyester fabric using one-bath dyeing method

2019 ◽  
Vol 90 (5-6) ◽  
pp. 655-665 ◽  
Author(s):  
Lihua Fan ◽  
Yongsong Tan ◽  
Jeremiah Amesimeku ◽  
Yunjie Yin ◽  
Chaoxia Wang
Keyword(s):  
Graphene Oxide ◽  
Polyester Fabric ◽  
Disperse Dye ◽  
Reduction Time ◽  
Dyeing Process ◽  
Functional Dyes ◽  
One Bath Dyeing ◽  
Dyeing Method ◽  
Dyed Fabric ◽  
Microscopic Morphology

A novel functional disperse dye doped with graphene oxide for antistatic properties of polyester fabric was achieved, which means that the dyeing and antistatic finishing can be simultaneously obtained by a one-bath method. Functional dyes were used to dye polyester fabric by a high-temperature, high-pressure dyeing method. The surface microscopic morphology of the dyed polyester fabric, and the dispersion properties of the disperse dye, graphene oxide, and the functional disperse dye, were characterized by scanning electron microscopy. The effects of the dyeing temperature on the particle sizes of three dyeing liquors were explored; this revealed that the temperature of the dyeing process had no effect on particle size. The dosage and reduction time of graphene oxide were investigated. The surface electrical resistance of the dyed fabric, 9.8 × 106 Ω, obtained at a condition of 2% (o.m.f) graphene oxide with a reduction time of 30 min, achieved A-grade antistatic standard. Furthermore, the rubbing and washing fastness of the treated fabric were 4- and 4 ∼ 5 grades, respectively. This preparation of the functional disperse dye provides a possibility in one-bath dyeing and antistatic finishing of polyester fabric.

scholarly journals Dyeing of Polyester Fabric with Natural Colorants Extracted from Mahogany (Swieteniamahagoni) Seed Pods

2020 ◽  
Vol 11 (1) ◽  
pp. 37-42
Author(s):  
Md Abdullah Al Mamun ◽  
Mohammad Mamun Hossain ◽  
Mubarak Ahmad Khan
Keyword(s):  
Crude Extract ◽  
Polyester Fabric ◽  
Disperse Dyes ◽  
Color Fastness ◽  
Color Strength ◽  
Uv And Ir Spectra ◽  
Natural Colorants ◽  
Dyeing Method ◽  
Exhaust Dyeing ◽  
Dyed Fabric

Polyester fabric is usually dyed with disperse dyes which has severe limitations specially toxicity and environmental issues. The aim of the present research is to introduce an ecofriendly dyeing process for polyester fabric with natural dyes. The natural colorants were extracted from mahogany seed pods using the simple acid boiling method. The spectroscopic analysis of the crude extract was carried out by UV and IR spectra of the extracted dyes and illuminated the presence of natural tannins as coloring materials in the crude extract. 10g fabric was dyed in 200cc extracted solution at 130⁰C for 60 minutes in exhaust dyeing method followed by neutralization and soaping. Finally, a light brown dyed fabric was obtained. The dyed fabric exhibited color strength in terms of k/s value of 0.63 (λmax 360nm), lightness of 80.565 and chromaticity value of 12.002 CIE units. Different samples were dyed by fluctuating the dyeing period. The dyeing traits of the dyed materials were judged in terms of their color strength and fatness properties. All testes were carried out following the ISO standards. From the results, it is lucid that the dyed fabric showed acceptable color fastness properties in case of all fastness except color fastness to light. It is observed that dyeing time had profound influence on the color strength (k/s value) of the dyed material. The k/s value increases with the increase of dyeing period up to 120 minutes. The maximum color strength (0.76) was noted for the fabric. The shorter dyeing time produces lighter samples and the longer dyeing time produced colorful samples. Journal of Engineering Science 11(1), 2020, 37-42

scholarly journals Immunomodulatory Activity of Low Molecular-Weight Peptides from Nibea japonica in RAW264.7 Cells via NF-κB Pathway

Marine Drugs ◽  
2019 ◽  
Vol 17 (7) ◽  
pp. 404 ◽  
Author(s):  
Zhuangwei Zhang ◽  
Xuyang Hu ◽  
Lin Lin ◽  
Guofang Ding ◽  
Fangmiao Yu
Keyword(s):  
Nitric Oxide ◽  
Molecular Weight ◽  
Cell Cycle Progression ◽  
Protein Hydrolysate ◽  
Raw264.7 Cells ◽  
Immunomodulatory Activity ◽  
Low Molecular Weight ◽  
Phagocytic Capacity ◽  
Activated State ◽  
Factor Α

In this study, a low molecular-weight (Mw) peptide named NJP (<1 kDa), was purified from a protein hydrolysate of Nibea japonica by ultrafiltration, and its immunomodulatory effect on RAW264.7 cells was evaluated. The lactate dehydrogenase (LDH) and MTT assays were performed to explore the cytotoxicity of NJP. The results showed that NJP promoted cell proliferation and had no significant toxic effects on RAW264.7 cells. Moreover, the cells formed multiple pseudopodia indicating that they were in activated state. Further tests showed that NJP significantly promoted phagocytic capacity, and the secretion of proinflammatory cytokines tumor necrosis factor-α (TNF-α), interleukin-6 (IL-6), and interleukin-1β (IL-1β). It also increased the synthesis of nitric oxide (NO) by upregulating inducible nitric oxide synthase (iNOS) protein level. Flow cytometry revealed that NJP promoted cell cycle progression and increased the percentage of cells in G0/G1 phase. NJP promoted IκBα degradation, p65 and nuclear factor (NF)-κB activation and translocation by up-regulating IKKα/β protein expression. In conclusion, these results indicated that NJP exerts immunomodulatory effects on RAW264.7 cells through the NF-κB signaling pathway. Therefore, NJP can be incorporated in the production of functional foods or nutraceuticals.

Thermal Properties, Structure, and Dye Absorption Ability of Carboxymethyl Cellulose/PP Composite Fibers

2017 ◽  
Vol 728 ◽  
pp. 289-294
Author(s):  
Tanapak Metanawin ◽  
Praripatsaya Panutumrong ◽  
Jirapong Phangham ◽  
Siripan Metanawin
Keyword(s):  
Thermal Properties ◽  
Carboxymethyl Cellulose ◽  
Composite Fibers ◽  
Screw Extruder ◽  
Melt Temperature ◽  
Single Screw ◽  
Dyeing Process ◽  
Single Screw Extruder ◽  
Dye Absorption ◽  
Banana Leaves

The present of this study aims to the use of carboxymethyl cellulose (CMC) improving the ability of fiber in the dyeing process. Carboxymethyl cellulose was synthesized from cellulose of banana leaves by esterification method. The effect of carboxymethyl cellulose contents on the structure, thermal properties and dye absorption were also investigated. Then, the CMC/PP composite fibers were obtained from single screw extruder at various contents of CMC (1wt%, 3wt% and 5wt%). The results from XRD showed that CMC were good compatibility with PP composite fibers. The results of thermal analysis showed that the incorporation of CMC into PP did not affect the melt temperature of the composite fibers. After dyeing, the dye however was absorbed by the CMC/PP fibers more than the pristine PP fibers. The results of absorption of dye on the CMC/PP fibers from spectrophotometer showed that dye absorbability were significantly increased with CMC contents.

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