Near room temperature dyeing of m‐aramid fabrics

Vu, Nguyen Cong; Michielsen, Stephen

doi:10.1002/app.48190

Cited by 11 publications

(5 citation statements)

References 20 publications

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“…Azam et al (2019) had success in dyeing meta-aramid fibers with disperse dye by increasing the dyeing temperature and concentration of the swelling agent. Vu and Michielsen (2019) explored dyeing meta-aramid fibers with basic dyes at lower temperatures by grafting poly(acrylic acid) onto the surface of the meta-aramid fiber, creating readily available bonding sites for a basic dye. Kim et al (Kim and Choi, 2011) also reported success in dyeing meta-aramid fibers with basic dyes by experimenting with swelling agents and concentrations of added electrolytes.…”

Section: Introductionmentioning

confidence: 99%

Soybean Oil and Nonthermal Plasma Pretreatment to Dye Para‐Aramid Woven Fabrics with Disperse Dye Using a Glycerol‐Based Dye Bath

Morris

Doona

2021

J Americ Oil Chem Soc

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High-performance para-aramid fibers offer a number of uses as strong, lightweight materials for protective vests, helmets, tires, and other applications. The chemically inert nature of the fibers makes them difficult to dye or durably print by conventional dyeing techniques for textiles, and solution dyeing during production of the fibers can limit the color of para-aramid fabrics to the color of the spun yarn prior to weaving or knitting and thereby limit the practical applications of these textiles as protective outerwear. This study presents a new method developed to improve the dyeing of woven para-aramid fabrics with a disperse dye. Specifically, sequential experimentation proves the beneficial effects of first soaking para-aramid fabrics in soybean oil followed by surface treatment with atmospheric nonthermal plasma and using glycerol as the dispersant and sodium chloride as an electrolyte without the addition of other auxiliary chemicals. Under the optimized treatment conditions of this study, the color strength (K/S value) of dyed para-aramid fabrics increased to 3.89 from 0.35 of the untreated samples as determined from spectral analysis of the sample reflectance in the visible range. Fourier transform infrared spectroscopy analysis revealed that the high content of unsaturated fatty acids in soybean oil and their interaction with reactive species in the ambient nonthermal plasma were the primary factors for improving the color strength of the dyed para-aramid fabrics.

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Section: Introductionmentioning

confidence: 99%

Soybean Oil and Nonthermal Plasma Pretreatment to Dye Para‐Aramid Woven Fabrics with Disperse Dye Using a Glycerol‐Based Dye Bath

Morris

Doona

2021

J Americ Oil Chem Soc

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“…Currently, the color of woven aramid materials uses primarily solution dyeing methods, in which the coloring of the yarns in the woven or knit fabric is determined by adding colorant to the polymer dope at the time the aramid filament is produced, thereby limiting the color options for the fabrics and their use in potential new applications. Various surface modification methods have been attempted to improve the dyeing of aramids, including chemical treatments with strong acids [ 2 , 3 ] and auxiliary additives [ 4 ], physical approaches using UV/O 3 irradiation [ 5 ] or nonthermal plasma [ 6 ], and chemical grafting using poly(acrylic acid) [ 7 ] or a diblock copolymer derived from methacryloyloxy-ethyl-trimethylammonium chloride [ 8 ], which claimed improved dyeability with different types of dyes. Most of these methods focused on the surface modification of meta-aramids, and few reported successes in dyeing para-aramids [ 9 , 10 , 11 ].…”

Section: Introductionmentioning

confidence: 99%

Dyeing Para-Aramid Textiles Pretreated with Soybean Oil and Nonthermal Plasma Using Cationic Dye

Morris

Doona

2021

Polymers

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The increasing use of functional aramids in a wide array of applications and the inert nature of aramids against conventional dye and print methods requires developing new dyeing methods. This study aims to use environmentally friendly method with a cationic dye as an alternative for dyeing para-aramid fabrics. Experiments used a multi-factorial design with functions of pretreatment, dye solvent (water and/or glycerol) and auxiliary chemical additives (swelling agent and surfactant) and a sequential experimentation methodology. The most effective dyeing procedures involved the following steps: (i) pretreatments of the fabrics with soybean oil and nonthermal plasma (NTP), (ii) using water at T = 100 °C as the dye solvent, and (iii) omitting other chemical additives. With a commercial cationic dye, these conditions achieved a color strength in K/S value of 2.28, compared to ~1 for untreated samples. FTIR analysis revealed that a functional network formed on the fibers and yarns of the fabrics by chemical reactions of excited plasma species with double bonds in the soybean oil molecules was responsible for significantly improving the color strength. These results extend the potential uses of a renewable material (soybean oil) and an environmentally friendly technology (NTP) to improve the dyeing of para-aramid textiles and reduce the use of harsh dye chemicals.

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“…Therefore, aramid fibers have been widely used in advanced textiles, including bullet‐proof vests and helmets, spacesuits, firemen's turn‐out coats, flame‐retardant gloves, industrial protective clothing, and so on 7–10 . However, due to the numerous hydrogen bonds between amide groups in polymer chains, its crystallinity and glass transition temperature ( T g 270°C) are high, 8 resulting in the extremely poor dyeability of aramid textile and especially low light fastness of the dyed aramid by conventional dyeing techniques, 11–13 which greatly limits the scope of its practical application. Moreover, the variety of colors of aramid fabrics is much less available than other fabrics.…”

Section: Introductionmentioning

confidence: 99%

Bright structural colorful aramid fabrics with outstanding light fastness

Han,

Hu,

et al. 2023

AIChE Journal

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The problems of difficult dyeing, poor dyeing fastness, and dyeing pollution of aramid are always great obstacles in the practical application. In theory, constructing particular nanostructures instead of dyes on aramids to achieve bright structural colors will be an effective strategy. However, it is still challenging to construct particular nanostructures on aramid fabric surfaces because of their roughness. Here, beautiful and noniridescent structural colored aramids with excellent light fastness were achieved by spraying a thin layer of randomly distributed nanospheres on the surface of adhesive‐modified aramids. Moreover, different bright structural colors and colorful patterns were obtained by simply controlling the size or refractive index of the spheres. Importantly, the light fastness of the structural colored aramid can reach levels 6–7 or higher. The simple and eco‐friendly coloring technology can be compatible with industrial equipment to obtain stable multicolored aramid products, exhibiting great real potential applications.

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Near room temperature dyeing of m‐aramid fabrics

Cited by 11 publications

References 20 publications

Soybean Oil and Nonthermal Plasma Pretreatment to Dye Para‐Aramid Woven Fabrics with Disperse Dye Using a Glycerol‐Based Dye Bath

Soybean Oil and Nonthermal Plasma Pretreatment to Dye Para‐Aramid Woven Fabrics with Disperse Dye Using a Glycerol‐Based Dye Bath

Dyeing Para-Aramid Textiles Pretreated with Soybean Oil and Nonthermal Plasma Using Cationic Dye

Bright structural colorful aramid fabrics with outstanding light fastness

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