Use of glucose as an ecofriendly reducing sugar in the application of sulphur dyes -Comparative study with traditional reducing agent

Attempts have been made to replace the mostly used reducing agent (sodium sulphide), and the most effective reducing agent (sodium dithionite), with an environment- friendly reducing sugar (glucose). This comparison is based on the redox potential and pH used under different concentrations of reducing agent, caustic soda and sodium carbonate. The dyeing performance resulting from the reduction of the CI Leuco Sulphur dye Black 1 by each one of the studied reducing agents is appreciated by measuring the colour yield and by evaluating dyeing fastness. The obtained results show that glucose can offer an environmentally safe alternative to sodium dithionite and sodium sulphide as a reducing agent in sulphur dyeing processes

Use of glucose as an ecofriendly reducing sugar in the application of sulphur dyes - Comparative study with traditional reducing agent

57-61Attempts have been made to replace the mostly used reducing agent (sodium sulphide), and the most effective reducing agent (sodium dithionite), with an environment- friendly reducing sugar (glucose). This comparison is based on the redox potential and pH used under different concentrations of reducing agent, caustic soda and sodium carbonate. The dyeing performance resulting from the reduction of the CI Leuco Sulphur dye Black 1 by each one of the studied reducing agents is appreciated by measuring the colour yield and by evaluating dyeing fastness. The obtained results show that glucose can offer an environmentally safe alternative to sodium dithionite and sodium sulphide as a reducing agent in sulphur dyeing processes

Etude du rôle et optimisation des propriétés de mouillage et d'imprégmation dans l'impression des tissus par jet d'encre

Une nouvelle approche de l'impression jet d'encre a été proposée au cours de ce travail de thèse et qui consiste à relier les paramètres critiques du process d'impression aux propriétés structurales du film d'épaississant enduisant le support textile. Les morphologies de séchage du film d'épaississant et leur évolution en fonction de la température sont explorées et corrélés au comportement d'une goutte d'encre déposée sur l'enduit. Les résultats montrent que l'organisation morphologique du film d'apaississant détermine de façon critique l'étalement et l'imprégnation de la goutte dont la vitesse et le taux peuvent être optimisés pour l'impression par un ajustement de la morphologie de l'enduit. La qualité du processus d'impression jet d'encre résulte de l'équilibre entre ces deux phénomènes compétitifs. Les résultats obtenus ont été transposés dans le cas d'une impression jet d'encre réalisée sur un support textile imprégné avec la solution d'épaississant.MULHOUSE-SCD Sciences (682242102) / SudocSudocFranceF

Decolorization Kinetics of Acid Azo Dye and Basic Thiazine Dye in Aqueous Solution by UV/H2O2 and UV/Fenton: Effects of Operational Parameters

The photochemical decolorization of two dyes, namely Acid Yellow 54 and Basic Blue 9, was studied using the UV/H2O2 and UV/Fenton processes. The effects of the amount of H2O2 and FeSO4 as well as the initial pH solution on decolorization kinetics of both the dyes were investigated. The pseudo-first order kinetic model was applied to predict the decolorization of the selected dyes at the different operational conditions and results showed that this model fitted very well with the experimental data. The obtained results also showed the efficiency of UV/Fenton process to quickly degrade aqueous effluents polluted by Acid Yellow 54 and Basic Blue 9 compared to the UV/H2O2 process

Drop Impact on Textile Material: Effect of Fabric Properties

This paper presents an experimental study of impact of water drop on a surface in a spreading regime with no splashing. Three surfaces were studied: virgin glass, coating film and woven cotton fabric at different construction parameters. All experiments were carried out using water drop with the same free fall high. Digidrop with high-resolution camera is used to measure the different parameters characterising this phenomenon. Results show an important effect of the height of the free fall on the drop profile and the spreading behaviour. An important drop deformation at the surface impact was observed. Then, fabric construction as the weft count deeply affects the drop impact. For plain weave, an increase of weft count causes a decrease in penetration and increase in the spreading rate. The same result was obtained for coated fabric. Therefore, the impact energy was modified and the drop shape was affected, which directly influenced the spreading rate

Wetting-Induced Formation of Quasiperiodical Wrinkling Patters in Alginate-Based Coating

International audienc

Decolorization Kinetics of Acid Azo Dye and Basic Thiazine Dye in Aqueous Solution by UV/H2O2 and UV/Fenton: Effects of Operational Parameters

The photochemical decolorization of two dyes, namely Acid Yellow 54 and Basic Blue 9, was studied using the UV/H2O2 and UV/Fenton processes. The effects of the amount of H2O2 and FeSO4 as well as the initial pH solution on decolorization kinetics of both the dyes were investigated. The pseudo-first order kinetic model was applied to predict the decolorization of the selected dyes at the different operational conditions and results showed that this model fitted very well with the experimental data. The obtained results also showed the efficiency of UV/Fenton process to quickly degrade aqueous effluents polluted by Acid Yellow 54 and Basic Blue 9 compared to the UV/H2O2 process

New microcapsules based on isosorbide for cosmetotextile: Preparation and characterization

International audienc

Luminescent cotton fibers coated with fluorescein dye for anti-counterfeiting applications

International audienc