Dissertation > Industrial Technology > Light industry,handicrafts > Textile industry,dyeing and finishing industry > Dyeing and finishing industry > General issues > Dyes, pigments, pharmaceutical and additives

The Synthesis and Application of Cationic Modifier ZY on Cotton Fibers

Author LiBaoMei
Tutor ZhaoYaQin
School Hebei University of Science and Technology
Course Textile Chemistry and Dyeing and Finishing Engineering
Keywords Cationic modifier Cotton fabric Epoxy quaternary ammonium salt Reactive Dyes Dyeing K / S values
CLC TS190.2
Type Master's thesis
Year 2012
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In order to achieve the reactive dyes without salt staining between cotton fiber and reactive dye affinity , increase the activity of the dye rate this article cationic modified technology , cationic modified cotton fabric , and cyanuric chloride precursor , 3 - chloro - 2 - hydroxy propyl trimethyl ammonium chloride as the cationic functional monomer , was prepared by nucleophilic substitution the bis - quaternary ammonium cation modifier ZY , and on cotton fiber with a modifying agent ZY cationic pre treatment, so that the surface of the cotton fibers with a positive charge , and then dyed with reactive dyes . This paper the preparation of cationic modifier effects of monomer ratio , reaction time, reaction temperature, initiator concentration and process parameters on the synthesis reaction . Infrared spectroscopy were used to characterize the composition and structure of the product ZY , verify that the target product . Finally, the use of modifier ZY modified cotton fabric and dyed . Determined by changing the process parameters of the modifier concentration , modified time , pH, and temperature , the reactive dyeing fabric dyeing rate and the fabric K / S value , detailed discussion of the impact of cotton fiber Cationic modification effect factor. Identified the cationic modifier ZY use the best modified method for the impregnation method , the optimum conditions for the modifier 25g / L sodium hydroxide 24g / L, a modified temperature 55 ° C , the modified time of 20 min . Salt-free dyeing with reactive dyes , the best staining results , the K / S values ??of the fabric and dye on the highest uptake rate . , Modifiers ZY cotton fiber for the application of the cationic modifier opened up a new direction , to increase the modifier and the binding force of the cotton fiber , dye uptake and fixation rate , reducing the change sexual dosage , reduce costs , improve production efficiency .

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