scholarly journals The Effect of DBD Plasma Activation Time on the Dyeability of Woven Polyester Fabric with Disperse Dye

Polymers ◽  
2021 ◽  
Vol 13 (9) ◽  
pp. 1434
Author(s):  
Thu Nguyen Thi Kim ◽  
Khanh Vu Thi Hong ◽  
Nguyen Vu Thi ◽  
Hai Vu Manh
Keyword(s):  
Plasma Treatment ◽  
Exposure Time ◽  
Treatment Time ◽  
Polyester Fabric ◽  
Plasma Exposure ◽  
Dbd Plasma ◽  
Sem Images ◽  
Weft Direction ◽  
Plasma Treatment Time ◽  
Plasma Exposure Time

This study consists of two parts. In the first, the woven polyester fabric, after washing to remove lubricant oils, was treated with the dielectric barrier discharge (DBD) plasma at the short plasma exposure time (from 15 to 90 s). The effect of the plasma exposure time on the activation of the polyester fabric was assessed by the wicking height of the samples. The results show that the wicking height in the warp direction of the plasma-treated samples improved but was virtually unchanged in the weft direction. Meanwhile, although the tensile strength in the warp direction of the fabric was virtually unaffected despite the plasma treatment time up to 90 s, in the weft direction it increased slightly with the plasma treatment time. Scanning Electron Microscope (SEM) images and the X-ray Photoelectron Spectroscopy (XPS) spectra of the samples before and after the plasma treatment were used to explain the nature of these phenomena. Based on the results of the first part, in the second part, two levels of the plasma treatment time (30 and 60 s) were selected to study their effect on the polyester fabric dyeability with disperse dyes. The color strength (K/S) values of the dyed samples were used to evaluate the dyeability of the fabric. The SEM images of the dyed samples also showed the difference in the dyeability between the plasma-treated and untreated samples. A new feature of this study is the DBD plasma treatment condition for polyester fabrics. The first is the use of DBD plasma in air (no addition of gas). Second is the very short plasma treatment time (only 15 to 90 s); this condition will be very favorable for the deployment on an industrial scale.

scholarly journals Surface Modification by the DBD Plasma to Improve the Flame-Retardant Treatment for Dyed Polyester Fabric

Polymers ◽  
2021 ◽  
Vol 13 (17) ◽  
pp. 3011
Author(s):  
Ha-Thanh Ngo ◽  
Khanh Vu Thi Hong ◽  
The-Bach Nguyen
Keyword(s):  
Tensile Strength ◽  
Plasma Treatment ◽  
Flame Retardant ◽  
Contact Time ◽  
Treatment Time ◽  
Color Change ◽  
Polyester Fabric ◽  
Dbd Plasma ◽  
Plasma Pretreatment ◽  
Plasma Treatment Time

In the first part of the study, dyed polyester fabric was treated with a dielectric barrier discharge (DBD) plasma at 1 W/cm2 for 15, 30, 60 and 90 s. The wicking height, tensile strength and color of the control and plasma treated fabrics were measured. Results show that the fabric capillary increases with plasma treatment time up to 90 s. However, plasma treatment time longer than 60 s caused an obvious color change and decrease in tensile strength of fabric. Plasma contact time should be such that plasma can improve the hydrophilicity of the fabric and adversely affect the properties of the fabric as little as possible. Thus, the suitable plasma contact time should be less than 60 s. Based on these results, in the second part of the study, three different time levels (15, 20 and 30 s) were selected for plasma pretreatment of this fabric. The plasma-treated fabric was then padded with the flame retardant (FR) (CETAFLAM PDP 30), dried and finally cured at 190 °C for 120 s. The limited oxygen index (LOI) of FR fabrics and the vertical fire characteristics of FR fabric after being washed 5 times also were measured. Comparison of these results with those of FR fabrics without plasma pretreatment shows that plasma pretreatment improves the fabric’s flame retardancy and FR durability. Moreover, it also reduces the heat shrinkage of PET fabric due to high temperature curing. The scanning electron microscopy (SEM) images of the fabric after plasma treatment and FR treatment and the energy-dispersive spectroscopy (EDS) spectrum of the fabric are consistent with the above results.

scholarly journals Plasma Induced Physicochemical Changes and Reactive Dyeing of Wool Fabrics

2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
J. Udakhe ◽  
S. Honade ◽  
N. Shrivastava
Keyword(s):  
Plasma Treatment ◽  
Treatment Time ◽  
Chemical Properties ◽  
Oxygen Demand ◽  
Cysteic Acid ◽  
Wool Fabric ◽  
Dbd Plasma ◽  
Reactive Dyeing ◽  
Physicochemical Changes ◽  
Plasma Treatment Time

This study focuses on the effect of dielectric barrier discharge (DBD) plasma treatment on physical and chemical properties of wool fabric and its relation to exhaustion of Drimalan Navy Blue FBI reactive dye. AFM analysis of plasma treated wool fabric has shown partial removal of epicuticle and thus reduced scale height. FD spectroscopy has shown improvement in hydrophilicity by many folds after plasma treatment. ATR graphs depict the removal of hydrophobic layer of 18-MEA and introduction of hydrophilic groups like cysteic acid after plasma treatment. Alkali solubility of wool fabric increases with increasing plasma treatment time. Wetting time for plasma treated fabric reduces drastically when compared to untreated wool fabric. It is found that plasma treated fabric takes much lesser time to reach maximum dye exhaustion than untreated fabric. Substantivity of the dye increases significantly after plasma treatment. Colour fastness properties improve with increase in plasma treatment time. Chemical oxygen demand (COD) of spent dyebath liquor is found to reduce with increase in plasma treatment time. Biological oxygen demand (BOD) is found to be higher for plasma treated samples, while ratio of COD/BOD has reduced with increase in the plasma treatment time.

The Changes of Thickness and Tearing Behavior of Tencel Fabrics Treated with Different Time by Plasma

2015 ◽  
Vol 1096 ◽  
pp. 413-416
Author(s):  
Li Sha Zhang ◽  
Hong Ling Liu ◽  
Wei Dong Yu ◽  
Ruo Hua Liu
Keyword(s):  
Plasma Treatment ◽  
Treatment Time ◽  
Low Pressure ◽  
Mean Value ◽  
Weft Direction ◽  
Pressure Plasma ◽  
Low Pressure Plasma ◽  
Plasma Treatment Time ◽  
Tearing Strength

Tencel fabrics were treated with low pressure plasma with air for different treatment time. The samples were tested their thickness and calculated each mean value of fabrics treated with different time. The result indicated that samples became thicker with the prolonged plasma treatment time. The samples were also divided into two groups and tore along warp and weft direction, respectively, to measure the influence of plasma treatment time on the tearing strength. The result of the measurement implied that the tearing strength of samples treated 1 minute by plasma decreased dramatically, when they were compared with the untreated ones. However, the decrease of the tearing strength became slight when the plasma treatment increased to 5, 10 and 20 minutes.

scholarly journals Mechanism of Ampicillin Degradation by Non-Thermal Plasma Treatment with FE-DBD

Plasma ◽  
2017 ◽  
Vol 1 (1) ◽  
pp. 1-11 ◽  
Author(s):  
Joshua Smith ◽  
Isaac Adams ◽  
Hai-Feng Ji
Keyword(s):  
Plasma Treatment ◽  
Treatment Time ◽  
Atmospheric Pressure Plasma ◽  
Resonance Spectroscopy ◽  
Air Plasma ◽  
Dbd Plasma ◽  
Plasma Treatment Time ◽  
Non Thermal Plasma ◽  
Air Plasma Treatment ◽  
Floating Electrode

This research focused on determining the effectiveness of non-thermal atmospheric pressure plasma as an alternative to advanced oxidation processes (AOP) for antibiotic removal in solution. For this study, 20 mM (6.988 g/L) solutions of ampicillin were treated with a floating electrode dielectric barrier discharge (FE-DBD) plasma for varying treatment times. The treated solutions were analyzed primarily using mass spectrometry (MS) and nuclear magnetic resonance spectroscopy (NMR). The preliminary product formed was Ampicillin Sulfoxide, however, many more species are formed as plasma treatment time is increased. Ampicillin was completely eliminated after five minutes of air-plasma treatment. The primary mechanism of ampicillin degradation by plasma treatment is investigated in this study.

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