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The Impact on Dyeing with Sulfur Dyes with the Use of Pech-amine

Author: DangGaoFeng
Tutor: ZhangQing
School: Donghua University
Course: Textile Chemistry and Dyeing and Finishing Engineering
Keywords: Sulfur Dyes PECH-amine Cationic modified Cotton fabric Fixative
CLC: TS193.1
Type: Master's thesis
Year: 2012
Downloads: 25
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Abstract

PECH-amine is a polyamine compound obtained polymer by epichlorohydrin with dimethylamine in the reaction under the conditions of 95 ℃ cationic modifier. PECH-amine polyamine compounds reported have been many, but mainly to study the activity of PECH-amine modified and modified fiber fibers of cotton and other cellulose fiber fabric, direct dyes such as dyeing properties. This thesis is based on research the type and amount of solvent laboratory synthesis of PECH-amine, and for the first time to discuss the PECH-amine sulfur dyes on cotton fabric dyeing process. This paper discusses the main contents include: PECH-amine synthesis, PECH-amine sulfur dyes cotton fabric the cationic modified and modified cotton fabric performance, PECH-amine sulfur dyes cotton fabric fixing process research. Carbon tetrachloride, epichlorohydrin polymerization solvent, carbon tetrachloride toxicity, toxic chlorinated methane, its use is limited or even in the future may be disabled. Therefore, the research the polyamine compounds synthesized PECH-amine to reduce the amount of solvent carbon tetrachloride and other solvents. Experiments have found that cyclohexane can be used as the polymerization solvent. Tests comparing the degree of polymerization and molecular size by the viscosity of the synthesized under different conditions PECH. The experiment proved sequentially reduced, with the amount of carbon tetrachloride by 100mL reduced to 25mL, resulting PECH MW. Cyclohexane as a solvent obtained when PECH4 than carbon tetrachloride as the solvent when the molecular weight to be small. Experiment with carbon tetrachloride to as solvent synthetic of the PECH3-amine1, low molecular weight, moderate nitrogen content, the K / S values ??of modified cotton fabric of sulfur dyes is improved significantly, while relatively good levelness. The topics discussed the concentration of PECH3-amine1, factors such as the concentration of sodium hydroxide and modified on the impact of the modified cotton fabric sulfur dyes dyeing properties. The experiment shows that the modified optimum conditions of the impregnation method: the concentration of the modifier for the 1 g / L, NaOH concentration of 1g / L; rolling bake method modified optimum conditions: the concentration of the modifying agent is 8g / L, NaOH, concentration set at 8 g / L, the roll pressure as 1kg/cm2. Experiments show PECH3-amine1 the, modified cotton fabric with 5% owf of sulfur dyes, the K / S values ??can be greatly improved, and the dyeing rate increases. The modified fabric dyeing slightly lower, but the shade of greater volatility, pending further studies are needed to solve. Modified fiber for reducing energy consumption, improve efficiency, and save the dye as well as the protection of the environment has important significance. Experiments with carbon tetrachloride as a solvent are synthesized of the PECH1-amine2 larger molecular weight, water-soluble good. The fixing agent used as a sulfur dyes dyeing cotton fabric can effectively improve the wet rubbing fastness. The experimental method of fixing and NaOH concentration, PECH1 amine2 concentration, roll pressure process factors impact on the effect of fixing. The results showed that the impregnation method fixing the optimum conditions: PECH1-amine2 concentration of 2g / L, sodium hydroxide concentration of 8g / L; pad - dry method fixing the optimum conditions is: PECH1-amine2 concentration of 32 g / L, NaOH concentration of 8g / L, and roll pressure was set at 1kg/cm2, curing temperature 100 ° C. The results also show that the fixing effect of the immersion method than rolling - bake method. Using impregnation method 15% owf dyeing cotton fabric solid color processing, the wet rubbing fastness 0.5-1.5 level to improve, which vulcanization bright green 7713 dyed cotton fabric wet rubbing fastness to improve the most, can be increased by about 1.5, Sulphur Black BR ??dyed cotton fabrics increased by about 1. Meanwhile, solid color processing can improve soaping 0.5-1 level.

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CLC: > Industrial Technology > Light industry,handicrafts > Textile industry,dyeing and finishing industry > Dyeing and finishing industry > Dyeing > Staining physics, dyeing chemical
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