scholarly journals One-bath one-step dyeing of polyester/cotton (PC) blends fabric with disperse dyes after acetylation of cotton

2021 ◽  
Vol 1 (1) ◽  
Author(s):  
Girmaye Kumsa ◽  
Gemeda Gebino ◽  
Gezu Ketema
Keyword(s):  
Tensile Strength ◽  
Surface Modification ◽  
Disperse Dyes ◽  
Disperse Dye ◽  
Color Strength ◽  
Classic Problem ◽  
Fastness Property ◽  
One Step ◽  
Dyed Fabric ◽  
Time Of Reaction

AbstractAiming at the classic problem of dyeing of polyester–cotton blended fabric one-bath one-step dyeing of PC blends with disperse dye after surface modification of cotton were studied. Surface modification of cotton was carried out using fibrous acetylation methods. The optimum value for surface modification was obtained with a concentration of acetylation agent 16% and time of reaction 2.5 h, gave a percent acetylation of 34. Surface chemistry and thermal decomposition were studied by using FTIR spectra and TGA. The tear strength crease recovery, pilling and abrasion resistance were evaluated. The experiment result of dyeing showed that the optimum value was obtained with dye concentration above 1% at a temperature of 120 °C warp tensile strength decreased by 12% and weft tensile strength was decreased by 9% from the control half-bleached fabric. Results of this study showed that one-step one bath dyed modified PC blend with disperse dye fabric presents good fastness property and color strength values compared with conventional two-bath dyed fabric.

scholarly journals One-bath One-step Dyeing of Polyester/Cotton (PC) Blends Fabric With Disperse Dyes After Acetylation of Cotton

2021 ◽  
Author(s):  
Girmaye Kumsa Bana ◽  
Gemeda Gebino Gelebo ◽  
Gezu Ketema Janka
Keyword(s):  
Tensile Strength ◽  
Surface Modification ◽  
Disperse Dyes ◽  
Disperse Dye ◽  
Color Strength ◽  
Acetyl Content ◽  
Dyeing Process ◽  
One Step ◽  
The One ◽  
Dyed Fabric

Usually, the two-bath dyeing process using disperse dyes and reactive dyes separately was employed for the dyeing of PC blends. The cost of the double bath, dyeing cycle, energy consumption and chemical consumption is quite higher than the one-step or single bath dyeing methods. In this study, the one-bath dyeing process using one kind of dye was investigated. Polyester cotton blends dyed in one-bath one-step dyeing methods with disperse dye after surface modifications of cotton by acetylation methods were studied. Surface modification of cotton was carried out using fibrous acetylation methods. The effect of acetic anhydride and time on percent acetyl content at room temperature was studied. Modified polyester/cotton was carried out in HTHP dyeing machine incorporates with different dye concentrations and dyeing temperature. Surface chemistry, thermal decomposition property and moisture regain of modified polyester/ cotton blend are evaluated. The color strength of the dyed fabrics and their fastness properties to washing, light, and rubbing as well as tear strength and abrasion resistance were evaluated. The effect of dye concentration and temperature color strength, tensile strength warp and weft direction was assessed. The optimum value for surface modification was obtained with a concentration of acetylation agent 16% and time of reaction 2.5 hours, gave percent acetylation of 34. An FTIR spectrum shows acetylation resonance. The experiment result of dyeing showed that the optimum value was obtained with dye concentration above 1% at a temperature of 120oC, warp tensile strength decreased by 12% and weft tensile strength was decreased by 9% from the control half-bleached fabric. Results of this study showed that a one-step one-bath dyed modified polyester/cotton blend with disperse dye fabric presents good fastness property compared with conventional two-bath dyed fabric as well as colour strength values.

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

Effect of Lipase Enzyme on Physical and Dyeing Properties of Cellulose Acetate Fabric

2020 ◽  
Vol 13 ◽  
Author(s):  
Ali Akbar Zolriasatein
Keyword(s):  
Tensile Strength ◽  
Cellulose Acetate ◽  
Fiber Diameter ◽  
Enzymatic Treatment ◽  
Disperse Dyes ◽  
Color Strength ◽  
Lipase Enzyme ◽  
Pre Treatment ◽  
Bending Length ◽  
Lower Tensile Strength

: Cellulose acetate fabric was bio-treated by lipase enzyme. Afterwards, untreated and bio-treated fabrics were dyed with direct and disperse dyes in conventional methods. Enzymatic deacetylation of cellulose acetate fibers led to an improvement in hydrophilicity. The whiteness index of cellulose acetate fabric slightly decreased from 95.81 to 95.79 after bio-pretreatment. Lipase pre-treatment also caused an increase in fiber diameter up to 54.80%. Bending length decreased from 1.95 to 1.80 cm after enzymatic treatment while number of threads per centimeter and fabric thickness increased. Bio-treated fabric showed lower tensile strength in comparison to untreated fabric almost 52.48%. Change in morphology of fibers was observed by SEM after enzymatic deacetylation. Bio-treated fabric showed an increase in color strength in comparison to untreated fabric. The lipase pretreatment increased the color strength by 19.04 % and 18.50 % for direct and disperse dyes respectively.

The Feasibility Study of PET Fabric Dyed with Disperse Dye by Adding ZnO Powder

2011 ◽  
Vol 287-290 ◽  
pp. 2630-2634
Author(s):  
Chien Kuo Yen ◽  
Yi Jun Pan ◽  
Yi Yen Yeh ◽  
Yen Yu Chen ◽  
Yi Jyun Yao
Keyword(s):  
Feasibility Study ◽  
Treatment Time ◽  
Considerable Extent ◽  
Disperse Dyes ◽  
Disperse Dye ◽  
Pet Fabric ◽  
Dyed Fabric ◽  
Zno Powder ◽  
Color Depth

During PET fabric dyed with disperse dye by adding ZnO powder and ceramic bead made from which was studied. To utilize the effect of transmission of FIR to produce heat, it might reduce consuming quantity of dyestuffs and minimize requiring heat of conventional dyeing in the considerable extent. To vary the adding amount of ZnO powder within ceramic bead, the after-treatment time of ceramic bead, dyeing temperature and the concentration of dyeing solution, then the outcomes of dyeing was investigated. The researching results showed, there were obvious effectiveness to some specific disperse dyes either added ZnO powder or ceramic bead in dyeing bath. Under the same dyeing temperature, the color-depth of dyed fabric is deeper with the dyeing liquor of adding ZnO powder and ceramic bead; otherwise, the effect of adding ZnO powder was superior to which of ceramic bead.

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.

Surface Modification of Poly(Vinylchloride) for Manufacturing Advanced Catheters

2020 ◽  
Vol 27 (10) ◽  
pp. 1616-1633 ◽  
Author(s):  
Oana Cristina Duta ◽  
Aurel Mihail Ţîţu ◽  
Alexandru Marin ◽  
Anton Ficai ◽  
Denisa Ficai ◽  
...  
Keyword(s):  
Surface Modification ◽  
Chemical Modification ◽  
Medical Devices ◽  
Low Cost ◽  
Physical And Mechanical Properties ◽  
Polymeric Materials ◽  
Modern Medicine ◽  
Structural Failure ◽  
Chemical Grafting ◽  
One Step

Polymeric materials, due to their excellent physicochemical properties and versatility found applicability in multiples areas, including biomaterials used in tissue regeneration, prosthetics (hip, artificial valves), medical devices, controlled drug delivery systems, etc. Medical devices and their applications are very important in modern medicine and the need to develop new materials with improved properties or to improve the existent materials is increasing every day. Numerous reasearches are activated in this domain in order to obtain materials/surfaces that does not have drawbacks such as structural failure, calcifications, infections or thrombosis. One of the most used material is poly(vinylchloride) (PVC) due to its unique properties, availability and low cost. The most common method used for obtaining tubular devices that meet the requirements of medical use is the surface modification of polymers without changing their physical and mechanical properties, in bulk. PVC is a hydrophobic polymer and therefore many research studies were conducted in order to increase the hydrophilicity of the surface by chemical modification in order to improve biocompatibility, to enhance wettability, reduce friction or to make lubricious or antimicrobial coatings. Surface modification of PVC can be achieved by several strategies, in only one step or, in some cases, in two or more steps by applying several techniques consecutively to obtain the desired modification / performances. The most common processes used for modifying the surface of PVC devices are: plasma treatment, corona discharge, chemical grafting, electric discharge, vapour deposition of metals, flame treatment, direct chemical modification (oxidation, hydrolysis, etc.) or even some physical modification of the roughness of the surface.

The Use of Ultrasound in Bio-Treatment of Jute Yarn with Laccase Enzyme

2019 ◽  
Vol 12 (4) ◽  
pp. 275-286
Author(s):  
Ali A. Zolriasatein
Keyword(s):  
Tensile Strength ◽  
Reaction Times ◽  
Complete Removal ◽  
Jute Fiber ◽  
Light Fastness ◽  
Color Strength ◽  
Yellowness Index ◽  
Laccase Enzyme ◽  
Enzymatic Delignification ◽  
Jute Yarn

Background and Objective: Jute fiber is highly sensitive to the action of light. Significant features of the photochemical changes lose its tensile strength and develop a yellow color. It has been proved that the phenolic structure of lignin is responsible for the yellowing of jute fiber. In order to remove lignin, jute yarns were treated with laccase enzyme in different treatment times and ultrasonic powers. Lower whiteness index and higher yellowness index values were obtained by the laccase-ultrasound system in contrast to conventional laccase treatment. Methods: The laccase enzyme which entered the fibers by applying ultrasound, decreased the tensile strength while the loss in tensile strength was lower at high ultrasound intensities. FT-IR spectrum showed that the band at 1634 cm-1 assigned to lignin completely disappeared after laccase treatment in the presence of ultrasound. The absence of this peak in the laccase-ultrasound treated jute yarn suggests complete removal of lignin. Change in the morphology of fibers was observed by SEM before and after enzymatic delignification. The laccase-ultrasound treated yarns showed a rougher surface and more porosity. On the other hand, it was more effective in fibrillation of the jute fibers than the conventional method. Finally, bio-treated jute yarns were dyed with basic and reactive dyes. Results: The results indicated that at low intensities of ultrasound and relatively long reaction times, lignin can be more effectively removed and dye strength (K/S) increased to a higher extent. Laccase-ultrasound treatment increased the color strength by 33.65% and 23.40% for reactive and basic dyes respectively. Conclusion: In the case of light fastness, the conventional laccase treated yarns provided better protection than laccase-ultrasound treated yarns.

scholarly journals Preparation of magnetic nanoparticles by one step synthesis with morphology of particles changed based on time of reaction and temperature treatment

2020 ◽  
Vol 16 (1) ◽  
pp. 1-10
Author(s):  
Tomáš Solný ◽  
Petr Ptáček ◽  
Tomáš Opravil ◽  
Lucie Dlabajová ◽  
Matěj Březina ◽  
...  
Keyword(s):  
Magnetic Nanoparticles ◽  
Temperature Treatment ◽  
One Step ◽  
Time Of Reaction

Functionalized aluminum-catalyzed silicon nanowire formation and radial junction photovoltaic devices

Nanoscale ◽  
2021 ◽  
Author(s):  
Wipakorn Jevasuwan ◽  
Naoki Fukata
Keyword(s):  
Surface Modification ◽  
Solar Cells ◽  
Surface Defects ◽  
Silicon Nanowire ◽  
Photovoltaic Devices ◽  
Step Process ◽  
One Step ◽  
Length Reduction

Vertical Al-catalyzed SiNW arrays with shaped surfaces were synthesized by a one-step process and NW-based solar cells were demonstrated with optimized NW surface defects through surface modification and length reduction.

Eco-Friendly of Hibiscu cannabinus L. Fibers Dyeing with Natural Dye

2013 ◽  
Vol 781-784 ◽  
pp. 674-677
Author(s):  
Sudaporn Tangkawanit
Keyword(s):  
Natural Dye ◽  
Hibiscus Cannabinus ◽  
Intensive Study ◽  
Light Fastness ◽  
Color Strength ◽  
Caesalpinia Sappan ◽  
Washing Fastness ◽  
Fastness Property ◽  
Level 3

This research was an intensive study on development of Hibiscus cannabinus L. fibers dyeing with natural dye. The result reflected that color shade and color strength value results were different depend on type of mordanted. The Hibiscus cannabinus L. washing with detergent dyeing with Caesalpinia sappan L. and various mordented showed that light fastness was in level 3-4, when CuSO4 and FeSO4 mordanted light fastness result was in level 4-5, mordants as lime, CuSO4 and FeSO4 were added washing fastness property was in level 5.

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