Synthesis, stability and printing properties of a novel 2‐sulphophenoxy‐4‐chloro‐s‐triazine reactive dye for ink‐jet printing of wool

Abstract

We report here the synthesis and characterisation of a new medium‐reactivity reactive dye containing 2‐sulphophenoxy‐4‐chloro‐s‐triazine, having enhanced the activity of the chlorine atom for further substitution by the functional groups carried by wool fibre. In addition, a dichloro‐s‐triazine dye was also synthesised for the purpose of comparison. The progress of synthesis reactions and purity of the dyes were determined using capillary electrophoresis and thin layer chromatography. The molecular structure and the chemical compositions of the synthesised dyes were confirmed using Fourier Transform–infrared spectral data and elemental analyses. The inks containing the synthesised dyes were formulated and ink‐jet‐printed onto wool fabrics and then the printed fabrics were steamed at 102°C. Compared with the dichloro‐s‐triazine dye, superior performance in terms of ink stability, K/S and dye fixation was observed for the new 2‐sulphophenoxy‐4‐chloro‐s‐triazine dye. In addition, the light fastness of the fabric printed with the inks containing the new dye was 0.5‐grade greater than that of the fabric printed with the inks containing the dichloro‐s‐triazine dye, and no changes in shade and staining were observed following wash fastness tests of the fabrics printed with the inks containing the new dye.

Insights into Influences of Dye Hydrophobicity on Cleanliness and Resolution of Fabric Ink-Jet Printing

“…15,16 Some researchers have conducted various studies to improve the resolution of ink-jet printing images, which is closely related to the ink droplet shape. 1,10 Different types and amounts of organic solvents are added into reactive dye inks to obtain more stable droplets and high-quality images, which is conducive to improve dye efficiency. 17,18 The dye is modified to improve the resolution and adjust ink formula.…”

“…As a new technology, there are many technical difficulties to overcome in the actual production process of ink-jet printing. − For example, ink droplets cannot be ejected due to insufficient wetting of the nozzle during the ink-jet printing process. , In the process of designing ink formulation, the proportion of organic solvents is relatively large . Satellite ink droplets are more likely to form at high jetting frequency, resulting in lower image resolution on the fabric and air pollution. , …”

Characterization of synthetic dyes for environmental and forensic assessments: A chromatography and mass spectrometry approach

“…The applications of chromatography on dyes range from synthesis process control, but also application process evaluation [15], commercial dye evaluation [23], and dye degradation product analysis [24,25]. During the dye synthesis or extraction, TLC is a simple and efficient way to estimate the reaction endpoint of a synthesis procedure and measure the purity of the dye mixture [26–28]. In Faisal's work, a reactive dye for ink‐jet printing was synthesized, and TLC was used to assess the purity of the final products [27].…”

“…During the dye synthesis or extraction, TLC is a simple and efficient way to estimate the reaction endpoint of a synthesis procedure and measure the purity of the dye mixture [26–28]. In Faisal's work, a reactive dye for ink‐jet printing was synthesized, and TLC was used to assess the purity of the final products [27]. Moreover, the dye purity after synthesis as well as possible structure can be confirmed with HPLC combined with MS [29,30].…”

ICONTEX and ICONWOOLF 2019 Special Issue

“…The prints possessed excellent light and wash fastness properties. The second paper describes the synthesis and evaluation of a bifunctional reactive dye based on a triazine reactive system . It exhibits superior performance in terms of stability in water‐based ink‐jet formulations, dye fixation, colour strength and fastness properties due to its medium reactivity when applied to wool fabric by ink‐jet printing.…”