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Recent advances in anaerobic biological processes for textile printing and dyeing wastewater treatment: a mini-review
Textile printing and dyeing wastewater is usually characterized by high pH, high turbidity, poor bio-degradability, complex composition, and high chrominance, and is discharged in large amounts. It has been regarded as one of the hardest to treat forms of industrial wastewater. Conventional physicochemical technologies can remove these contaminants from water bodies, but at the expense of high energy consumption and high cost. Alternatively, biological processes with limited energy consumption, low cost and high efficiency are considered as promising technologies. Among them, the anaerobic biological processes have been proven to be effective for the treatment of high-concentration textile printing and dyeing wastewater. In this mini-review, recent advances on high-rate anaerobic technologies for such purposes are reviewed. Current limitations of these technologies are summarized, and future research directions are indicated.Graphical abstract
Journal Article
The fundamentals of printed textile design
This title explores contemporary practice in printed textile design. It provides an introduction to the creative skills, techniques and processes required by designers in order to produce a professional, creative, and commercially aware portfolio.
Book
Reactive Disperse Dyes Bearing Various Blocked Isocyanate Groups for Digital Textile Printing Ink
Wastewater management is of considerable economic and environmental importance for the dyeing industry. Digital textile printing (DTP), which is based on sublimation transfer and does not generate wastewater, is currently being explored as an inkjet-based method of printing colorants onto fabric. It finds wide industrial applications with most poly(ethylene terephthalate) (PET) and nylon fibers. However, for additional industrial applications, it is necessary to use natural fibers, such as cotton. Therefore, to expand the applicability of DTP, it is essential to develop a novel reactive disperse dye that can interact with the fabric. In this study, we introduced a blocked isocyanate functional group into the dye to enhance binding to the fabric. The effect of sublimation transfer on fabrics as a function of temperature was compared using the newly synthesized reactive disperse dyes with different blocking groups based on pyrazole derivatives, such as pyrazole (Py), di-methylpyrazole (DMPy), and di-tert-butylpyrazole (DtBPy). Fabrics coated with the new reactive disperse dyes, including PET, nylon, and cotton, were printed at 190 °C, 200 °C, and 210 °C using thermal transfer equipment. In the case of the synthesized DHP-A dye on cotton at 210 °C, the color strength was 2.1, which was higher than that of commercial dyes and other synthesized dyes, such as DMP-A and DTP-A. The fastness values of the synthesized DHP-A were measured on cotton, and it was found that the washing and light fastness values on cotton are higher than those of commercial dyes. This study confirmed the possibility of introducing isocyanate groups into reactive disperse dyes.
Journal Article
Print : fashion, interiors, art
\"Print is an exciting and dynamic design area, with new analogue and digital technologies opening up a wealth of creative possibilities for designers in textile and non-textile media. Witty, hyperreal and luxurious print designs are being used by fashion designers and in interiors, while fine artists are harnessing the latest technology in their work to stunning effect. This showcase of contemporary print designs from around the world is divided into three key areas: fashion, interiors and art. In fashion, the book features innovative print designs in haute couture, prمet-a-porter and accessories from companies such as Prada, Issey Miyake and Vivienne Westwood. The interiors section shows surfaces and interior products such as wallpaper, upholstered furniture, fabric hangings and floor coverings, and features a wide range of designers from Marimekko in Finland to Anna Glover in the UK. Fine-art prints and experimental work from international artists and designers such as Cristian Zuzunaga and Liberty Art Fabrics are represented in the final part\"--Publisher's website.
Book
Carboxymethyl cellulose and cellulose nanocrystals from cassava stem as thickeners in reactive printing of cotton
Textile printing ink was developed using carboxymethyl cellulose (CMC) and cellulose nanocrystals (CNCs) from cassava stem waste as thickeners. Thermal analysis and optimum conditions for production of the CMC were investigated. The optimum parameters for the production of the printing ink were determined using theoretical simulation. Thermogravimetric analysis (TGA) result showed that the cassava stem CMC sample was stable until at around 225 °C when degradation started with maximum degradation rate at 288 °C which is in agreement with the result displayed by differential scanning calorimetry (DSC).37.879% NaOH, 14.8762 g monochloro acetic acid (MCA) and 178 min (reaction time) is the optimum condition that gave 141.359% CMC yield, 1.09 CMC degree of substitution (DS), and CMC viscosity of 39.5777cP. FTIR spectroscopy revealed the presence of CMC and CNCs in the printing ink. At the ratio of 22.45:1 for the CMC and CNCs, the ink exhibited optimum viscosity of 24,247.4 cP. Addition of CNC particles within the range of 0 to 9 wt% loading caused a slight increase in the overall viscosity of the printing ink. The printing ink flow curve is highly non-Newtonian and pseudoplastic. Therefore, CNCs in small proportions can act as a benign co- thickener to CMC in textile printing ink with desirable properties such as very good colour fastness to wash and soft handle.
Journal Article
Performance Evaluation of Ink and Digital Textile Printing Fabric Using Natural Indigo
Synthetic dye is relatively cheap with attributes that render it easy to use compared to natural dye; hence, it has been extensively developed with increasing industrialization. However, synthetic dye and the current dyeing method have caused various environmental problems, including CO
2
emission and wastewater generation, necessitating research on eco-friendly dyes and dyeing. This study checked whether the natural indigo dye
(Indigofera tinctoria)
is derived from natural ingredients by measuring the
14
C (Biocarbon) present in it. In addition, we investigated the persistence and stability of digital textile printing (DTP) ink, which is derived from natural indigo dye by testing pH, absorbance, maximum absorption wavelength, viscosity, electric conductivity, surface tension, and particle size distribution for 90 days. Furthermore, the performance of natural indigo DTP ink and printing fabric was evaluated by inspecting the change in color fastness and corresponding index substances before and after digital printing with natural indigo DTP ink on textiles.
Journal Article
The influence of inkjet print parameters on warm/cool feeling and air permeability of printed textile substrates
PurposeThe research aims to examine the varying influence of printed inkjet ink on the warm/cool feeling and air permeability of printed textile materials and thus on the thermal properties of printed garments.Design/methodology/approachThe influence of different number of printing pass and different tone value (TV) coverage was examined. The tested samples were printed with water-based pigment inkjet inks with 10, 50 and 100% TVs with one, three and five printing passes. The tested samples were subjected to thermal characteristics testing by measuring the warm/cool feeling and air permeability before and after printing.FindingsThe research results showed that there is an increase in the value of the warm/cool feeling by increasing the amount of applied ink on the textile material, which occurs by increasing the TVs and the number of printing pass. At the same time values of air permeability decrease by increasing the number of printing pass, as well as by increasing TVs.Originality/valueBased on the results, mathematical models of the dependence of the warm/cool feeling value of printed textile materials on the air permeability and parameters of digital inkjet printing were created. These models are important in clothing design because they show in advance the values of the warm/cool feeling of the clothes being designed and thus enable the design of clothes for different purposes with optimal esthetic and thermal properties.
Journal Article