Level and Magnitudes of Shade Deviation and Subsequent Environmental Challenges of Turquoise Colorants

 Reactive dyes for turquoise hue have definite properties of larger structure results shade deviation between batches in knit fabric dyeing. Dyeing technique of turquoise color as well as comprehensive analysis on deviations on shade and physico-chemical properties concerning batches of dyed knitted fabric with respective utility consumption has been investigated in this research. To obtain the level and magnitudes of deviation, three batches of cotton knitted fabric dyed with turquoise color having same recipe as well as same condition were examined. Ailment of shade on different stage of knit dyeing with turquoise color also reported. Process chemicals, parameters, process flow and visual analysis on light box as well as spectrophotometer analysis of all three samples was supplemented. In addition, physical and chemical test of sample dyed fabric such as color fastness to wash, color fastness to rubbing was tested under the ISO 3, ISO 105 E04, and ISO- 105-AO3 method respectively. Besides color strength as well as utility and time consumption of each batch have an inclusive investigation. After widespread analysis of the samples a considerable shade deviation has been testified which lead to reprocessing. As a result, production rate becomes lower, fabrics damage, production cost, chemicals and water consumption become higher, which upshots ruthless impact on environment through higher pollutants generation

Cross linked Core-shell Silica Nanoparticles Mechanical, Structural & Viscoelastic Behavior

Shell cross-linked core-shell nanoparticles (SCCSNs) were prepared via miniemulsion polymerization of styrene in the presence of silane modified inorganic silica. The polystyrene (PS) shell of 69.8% in weight fraction was cross-linked using divinylbenzene. SCCSNs were spherical with a diameter distribution from 37 to 96 nm determined by dynamic light scattering. Dynamic rheology of SCCSNs suspended in PS/toluene solution was compared with that of suspensions of naked silica. The critical strain for onset of rheological nonlinearity was independent of SCCSN concentration above a concentration threshold, which differs from the silica suspensions. Linear dynamic rheological investigation revealed that SCCSN suspensions with a PS volume fraction of 25% were fluid-like at low particle concentrations while suspensions containing 4.5 vol% SCCSNs formed a gel-like structure. On the contrary, the silica suspensions with 20.0 vol% PS underwent a fluid-to-solid-like transition with increasing silica concentration. Reasons for the different rheological behaviors of the naked silica and SCCSN suspensions are discussed

The Influence of Annealing Process on Crystallinity and Structural Properties of Cotton/Spandex Fabric

This research aims to elucidate the crystallinity, structural and mechanical properties of cotton/spandex knitted fabric after conducting heat setting i.e., annealing process with optimized condition for the first time. Experimental results disclosed that, crystallinity index (CI) (%) of heat-treated cotton/spandex were increased with increased temperature and also mechanical properties i.e., tensile strength was improved as the temperature rose from 120 to 140°C and decreased with augmenting temperature ranges, which is in good agreement with the findings of CI % through X-ray diffraction (XRD) patterns. The attendance of cellulose dehydration was further confirmed by Fourier transform infrared (FT-IR) spectra in order to observe the structural integrity

Effective Processing Time & Cost Management of Dyes, Chemicals & Utilities Used in the Combed & Compact Knit Fabric Colouration in the Dyeing Textile Industries

Industrialization is an inevitable feature of economic intensification in a developing country. The textile dyeing industries uses huge amount of water, steam electricity and substantial quantities of complex chemicals. Textile dyeing house operating in this sector are facing significant challenges to reduce their natural resources and energy consumption. The main purposes of this investigation is to reduce the process time, cost of chemicals, cost of utilities and cost of effluent treatment. In the very beginning of this research, properties of compact and combed yarn were investigated. Then wet processing and process time required for both the compact and combed fabric are compared. Later on different costs associated with the wet processing of both compact and combed yarn fabric are also analyzed. Through this work it is tried to focus on the use of compact yarn fabric instead of combed yarn could be the best possible way to meet the challenges faced by the textile dyeing as well as textile industrie

Dopamine Grafted Iron-Loaded Waste Silk for Fenton-Like Removal of Toxic Water Pollutants

Dispersion of iron was achieved on waste silk fibers (wSF) after grafting of polydopamine (PDA). The catalytic activity of the resulting material (wSF-DA/Fe) was investigated in Fenton-like removal of toxic aromatic dyes (Methylene Blue, Cationic Violet X-5BLN, and Reactive Orange GRN) water. The dye removal yield reached 98%, 99%, and 98% in 10–40 min for Methylene Blue, Cationic Violet X-5BLN, and Reactive Orange GRN, respectively. The catalytic activity was explained in terms of the effects of temperature, dyes, and electrolytes. In addition, the kinetic study showed that the removal of dyes followed pseudo-1st order adsorption kinetics. These findings allow envisaging the preparation of fiber-based catalysts for potential uses in environmental and green chemistry

Progress in Decay of utility Intake, Process Time Assimilation and CO2 Emission in Textiles through New Generation Colorants

Textile dyeing effluents containing recalcitrant dyes are polluting waters due to their color and by the formation of toxic or carcinogenic intermediates such as aromatic amines from azo dyes. Since conventional treatment systems based on chemical or physical methods are quite expensive and consume high amounts of chemicals and energy, alternative technologies for this purpose have recently been studied. A number of new generation dyestuffs have been developed at laboratory scale to replace conventional dyestuff. Additionally, new generation dyestuffs shows very promising results for reduction of utilities and chemical consumption. In this contribution, we made a novel approach to detailed onsite investigation on water, steam, electricity and chemical minimization employing high exhaustion-fixation dyestuffs and analysis on production processes performed according to UNFCC clean Development Mechanism (CDM) promotion. Specific consumptions in wet processes were calculated by mass balance analyses. The multi-criteria decision-making methods were employed to determine suitable best available techniques

The Influence of Annealing Process on Crystallinity and Structural Properties of Cotton/Spandex Fabric

This research aims to elucidate the crystallinity, structural and mechanical properties of cotton/spandex knitted fabric after conducting heat setting i.e., annealing process with optimized condition for the first time. Experimental results disclosed that, crystallinity index (CI) (%) of heat-treated cotton/spandex were increased with increased temperature and also mechanical properties i.e., tensile strength was improved as the temperature rose from 120 to 140°C and decreased with augmenting temperature ranges, which is in good agreement with the findings of CI % through X-ray diffraction (XRD) patterns. The attendance of cellulose dehydration was further confirmed by Fourier transform infrared (FT-IR) spectra in order to observe the structural integrity

The Influence of Annealing Process on Crystallinity and Structural Properties of Cotton/Spandex Fabric

This research aims to elucidate the crystallinity, structural and mechanical properties of cotton/spandex knitted fabric after conducting heat setting i.e., annealing process with optimized condition for the first time. Experimental results disclosed that, crystallinity index (CI) (%) of heat-treated cotton/spandex were increased with increased temperature and also mechanical properties i.e., tensile strength was improved as the temperature rose from 120 to 140°C and decreased with augmenting temperature ranges, which is in good agreement with the findings of CI % through X-ray diffraction (XRD) patterns. The attendance of cellulose dehydration was further confirmed by Fourier transform infrared (FT-IR) spectra in order to observe the structural integrity