Sustainable pilot scale disperse dyeing in a waterless silicone medium dyeing system for no discharge of wastewater

Cheng, Wenqing; Pei, Liujun; Saleem, Muhammad; Zhu, Lei; Wang, Jiping

doi:10.1016/j.jclepro.2021.128953

Cited by 24 publications

(12 citation statements)

References 26 publications

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“…However, the drawbacks of high requirement and cost of supercritical carbon dioxide dyeing equipment, and the difficulty to recover the residual dyes after dyeing, restrict its industrial application. [16][17][18] The method of organic solvent as a medium can provide waterless dyeing of PLA fibre at a lower pressure, which has a better prospect of industrialisation. 19 The selected solvent for dyeing must be safe and recyclable.…”

Section: Introductionmentioning

confidence: 99%

Waterless dyeing of polylactic acid with disperse dyes using decamethylcyclopentasiloxane as medium

Fang

Ma³

et al. 2022

Coloration Technology

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Polylactic acid (PLA) fibre as a new generation of eco‐friendly polyester fibre is expected to substitute polyethylene terephthalate (PET) fibre to be an important textile fibre raw material. However, there exist severe strength loss and light dyeing colour by the traditional water bath dyeing method, which seriously affect the promotion and application of PLA fibre in the textile fields. Therefore, it is necessary to study waterless dyeing method for PLA. Decamethylcyclopentasiloxane (D5) possesses excellent physical and chemical properties with the characteristics of odourless, non‐flammable, and stable to various chemicals, which has been studied to be used as a waterless dyeing medium for PET fabric. In this study, D5 was selected as the medium to study the waterless dyeing process and properties for PLA. The effects of disperse dye dosage, dyeing temperature, dyeing time and liquor ratio on the dyeing properties of PLA fabric were investigated. The results showed that the optimal dyeing process conditions were as follows: the dye dosage was 4%, dyeing temperature and time were 120°C and 40 min, respectively, and the liquor ratio was 1:10. Then PLA was dyed by three different colour disperse dyes using the optimal process which were compared with the traditional water bath. The results showed that the properties of dyed PLA fabrics with D5 could reach the dyeing effect of the traditional water bath method, while causing less influence on its mechanical property. Therefore, this research proved that D5 can be used as a dyeing medium for PLA fabric to substitute the traditional water bath dyeing.

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Section: Introductionmentioning

confidence: 99%

Waterless dyeing of polylactic acid with disperse dyes using decamethylcyclopentasiloxane as medium

Fang

Ma³

et al. 2022

Coloration Technology

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“…Previously, we have carried out pilot-scale dyeing of both cotton and polyester in D5 non-aqueous media, calculated the cost of the whole process, and made a comparison with conventional aqueous dyeing. 13,16 Based on our previous experience, we have made a cost estimation for single-step single-bath dyeing and finishing of 1 ton of nylon fabric in D5 media. A comparison between the estimated cost of single-step single-bath dyeing and finishing in D5 media and the actual dyeing and finishing cost in a textile unit (data obtained from Haining Green Universe Textile Technology Co., Ltd) is given in Table 6.…”

Section: Resultsmentioning

confidence: 99%

“…The 98–99% of the D5 solvent initially used can be recycled/recovered and reused. 16 The present study aimed to develop a sustainable, single-step dyeing and finishing process for nylon by using D5 as dyeing media, excluding a separate dye fixation process, and making the dyeing and finishing process shorter by using a bifunctional chemical for carrying out the dye fixation and finishing steps together. The feasibility of such a process has been assessed by evaluating the color strength, color uniformity, colorfastness, and antibacterial properties of the treated fabric.…”

mentioning

confidence: 99%

Use of quaternary ammonium salt as a dye fixing agent and antimicrobial agent in sustainable, single-step single-bath dyeing and finishing

Saleem

Pei

Shahid

et al. 2022

Textile Research Journal

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In this investigation, a novel sustainable approach was employed to combine the dyeing and antimicrobial finishing steps for nylon fabric in a decamethylcyclopentasiloxane (D5) non-aqueous media dyeing system. Nylon fabric was dyed with acid dye and quaternary ammonium salt (QAS). Dimethyloctadecyl[3-(trimethoxysilyl)propyl]ammonium chloride was employed in the dyebath as a fixing agent. The dyeing efficiency was assessed by measuring the color characteristics and colorfastness of the dyed fabric. The success of antibacterial treatment was analyzed by observing the reduction in bacteria colony forming units. These results showed that uniformly dyed samples with higher color strength than the aqueous bath and excellent colorfastness were obtained in the D5 non-aqueous media dyeing system. After five Launder-Ometer washing cycles, the treated samples still showed good antibacterial activity. These results showed that the acid dyeing and QAS finishing processes of nylon fabric can be carried out in a D5 solvent bath at the same time.

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“…Unfortunately, to date, there are very few dyeing technologies for disperse dyes available in practice with the applicability of a waterless dyeing system, although polyester fabrics are dyed using an environmentally friendly method [ 29 , 30 , 31 , 32 ]. Therefore, the key to waterless dyeing technology is the dyeing medium in the dyeing process [ 33 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of Dispersant on Disperse Dyeing in Silicone Waterless Dyeing System

et al. 2023

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Traditional water-based dyeing of polyester textiles usually generates burdensome processes and a great deal of wastewater, which can no longer meet the green and sustainable developments in the textile dyeing industry. In the silicone waterless dyeing system, polyester textiles can be dyed with disperse dye without water. However, the dyeing performance of polyester textiles is influenced by the dispersant. In this study, the relationship between the properties of dispersants and disperse dyeing performance was studied. When the amount of dispersant NNO (2-Naphthalenesulfonic acid) was 1.2%, the exhaustion of disperse red 177 and the final K/S value of the dyed fabric improved to 94.18% and 14.73, respectively. However, the exhaustion of disperse red 177 was reduced from 90.73% to 82.61%, and the final K/S value of the dyed fabric was decreased from 14.77 to 14.01 when the dosage of MF (Naphthalenesulfonic acid) was 1.2%. Compared with different dyeing systems, the final uptake of disperse red 177 was 93.81% and 94.18% in traditional water-based and silicone waterless dyeing systems and the K/S value of the dyed fabric was almost the same. The washing and rubbing fastness (wet and dry) of the dyed fabric were found to be at a level of 4 or 4–5, and the light fastness of the dyed fabric was 3–4. If only the dispersant was added in the silicone waterless dyeing system, there was no leveling problems on dyed samples. Moreover, the maximum absorption wavelength of disperse red 177 was not changed after adding the dispersant. With an increasing amount of dispersant NNO, the solubility of the dye in the silicone solvent decreased, but it increased with an increasing amount of dispersant MF. In the relationship between dye exhaustion and dye solubility in a silicone waterless dyeing system, the exhaustion of dye was linearly and inversely proportional to the dye solubility. A dispersant with better hydrophilicity can decrease the solubility of the dye in dyeing media, and the dyeing performance of dye is better. Compared with previous studies, the exhaustion of dye was consistent with the ClogP value (hydrophobic constant) of the dyeing accelerant. Therefore, a dispersant with high hydrophilicity can reduce the solubility of dye and improve the exhaustion of disperse dye in a silicone waterless dyeing system. Moreover, the color fastness of the dyed fabric did not change before and after adding the dispersant.

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Sustainable pilot scale disperse dyeing in a waterless silicone medium dyeing system for no discharge of wastewater

Cited by 24 publications

References 26 publications

Waterless dyeing of polylactic acid with disperse dyes using decamethylcyclopentasiloxane as medium

Waterless dyeing of polylactic acid with disperse dyes using decamethylcyclopentasiloxane as medium

Use of quaternary ammonium salt as a dye fixing agent and antimicrobial agent in sustainable, single-step single-bath dyeing and finishing

Effect of Dispersant on Disperse Dyeing in Silicone Waterless Dyeing System

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