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Study on the Subsititute of Inorganic Salt Used in Active Dyeing on Cotton

Author: ShaoXiaLan
Tutor: ZhuQuan
School: Donghua University
Course: Applied Chemistry
Keywords: Low salt dyeing Sodium citrate Surfactant Composite accelerant
CLC: TS193.5
Type: Master's thesis
Year: 2012
Downloads: 32
Quote: 0
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Abstract

Reactive dye with the fiber when in use to form a strong covalent bond combination with excellent color fastness, and complete chromatogram with lower production costs, but it also exists to outstanding problems, added in a large amount of the inorganic salt in the dyeing process (Sodium Sulfate or sodium chloride) water and soil salinization, causing serious pollution to the environment. Therefore, in recent years, low-salt and salt-free dyeing of reactive dyes become one of the hot topics of the research workers of the printing and dyeing. The improved method is mainly from the dye structure, fiber modification, four aspects of the promoting agent and dyeing process to proceed, but their pros and cons, and accelerant mature industrialized products available in the market has not. As accelerant inorganic salt alternatives, including organic carboxylic acid salts, amphoteric surface active agents, rare earth salts and the like, and the literature has reported multi study its dyeing acceleration results from the application point is not discussed in depth from a theoretical perspective. In this paper, based on the reference to the research, try to study from the microscopic point of acceleration effect of organic acids formate and amphoteric surfactants. Carboxylic acid salts in the sodium citrate is the object of study, respectively, and the the six chloride salt of sodium chloride, potassium chloride, magnesium chloride, aluminum chloride, lanthanum chloride and cerium chloride complex with Sodium Sulfate fight from the peak and cotton fiber reactive dye absorption the Zeta potential impact angle to be examined and verified by staining test K / S value and color fastness to evaluate the absorbance and potential theory. The experiment showed that sodium citrate complex dubbed six accelerant dye absorbance can reduce, and can reduce the Zeta potential of cotton fiber; better they can reduce the potential accelerant, the more it can be good to promote the dye effect ; Meanwhile, the absorbance of the reactive dye is reduced, the more the better the effect of promoting transfection. The six composite promoting agent sodium citrate and potassium chloride compound made of the effect Jiaoyou. The second series of experimental studies accelerant amphoteric surfactants. Amphoteric surfactant has its own unique properties, first test the isoelectric point of the six surfactant CMC, and these six kinds of the surface active agent with Sodium Sulfate fight with from absorbance angle potentiometer angle, dyeing angle be research. The experiments show that the separate use of surfactants to promote poor dyeing effect, with Sodium Sulfate fight with superior dyeing acceleration effect; composite accelerant to change the shape of the absorption peak of the reactive dyes, the Zeta potential of the cotton fibers and the obtained The color effect of the same citric pro-transfection system, staining revealed that the amphoteric surfactants are best used in a concentration, which might be associated CMC relevant. The six composite promoting agent sodium of Sodium Sulfate lauroyl amino acids (referred to as FS701) compound made effects see excellent. Organic acid salt and surfactant pro-dyed effect, the combination of the two, and eventually get an optimal accelerant through different combination and proportion of complex: the traditional dyeing process under the conditions of the Yuan and Ming powder, potassium chloride and FS701 mixed use pro-dyed effect, when the three dosage 1 Og / L, 17.5g / L and 1 g / L, respectively, equivalent to the traditional Sodium Sulfate (50g / L) 94.96 %, salt total was reduced by 43%, and promoting the highest transfection efficiency, low salt dyeing purposes.

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