سنتز رنگ هاي ديسپرس راكتيو از رنگ هاي ديسپرس و كاربردشان روي نايلون و مخلوط هاي پلي استر/پشم

چكيده انگليسي :

Synthesis and Application of Reactive Disperse Dyes on Nylon and Wool Polester Blends Hengame Abdi Sufi ksimasol@gmail com Date of Submission 2011 07 26 Department of Textil Engineering Isfahan University of Technology Isfahan 84156 83111 Iran Degree M Sc Language FarsiSupervisor Mahmood Feiz m feiz@cc iut ac irAbstract Disperse reactive dyes in essence were intended to combine the favourable characteristics of disperseand reactive dyes on nylon namely excellent coverage of substrate irregularities and high wet fastness respectively In this work some disperse reactive dyes from disperse azo and anthraquinon dyes containingOH and NH2 groups in their structure were synthesized The original disperse dyes was purified bycrystallization and column chromatography Some different reactions for synthesis were studied Thedisperse dyes were substituted with chlorotriazine During the synthesis disperse reactive dyes the thinlayer chromatography TLC was applied to monitor the synthesis reaction After purification of products The characterization of the new dyes was performed by FTIR and UV VIS spectroscopies The productswere used to dye nylon and wool polyester blends For dyeing of nylon some kinds of dyeing methodssuch as one bath one step and one bath two steps dyeing were used and their dyeability were investigatedwith colour strength degree of exhaustion and fixation The best results were obtained when these dyeswere applied under acid condition until level dyeing properties of disperse dyes were produced When thebath is made mildly alkaline reaction occurs between dye and fibre and fast level dyeing is achieved Thedyeing obtained from disperse reactive dyes have fairly good fastness to washing The dyeings are stable toheat setting In fact dye fibre fixation tends to increase slightly under the high temperature conditions ofsetting Rubbing fastness of the dyings improved compared with dyeings obtained by disperse dyes It wasshown by optical microscopic that nylon dyed with disperse reactive dyes have leveling distribution ofdyes on the fibre The results from experimental shows that reaction between the disperse reactive dyeswith nylon fibre were occurred e g the disperse reactive dyes could not be completely stripped from thedyed fibre using solvents such as propanol which completely stripped conventional disperse dyes from thesubstrate The resistance of disperse reactive to propanol extraction that suggests that some force other thanvan der valce adsorption mechanical retention or salt linkage is holding the dye on the fibre Also whennylon which had been dyed with disperse reactive dyes was dissolved in o chlorophenol and the solutionprecipitated in propanol the precipitated nylon was coloured In the case of original disperse dyes theprecipitated nylon were colourless The above results showed that chemical bonding between dispersereactive dyes and nylon occurred The dyeing carried out on different wool polyester blends by a carrier dyeing technique The dyeing behavior of the synthesis disperse reactive dyes on the wool polyesterblends was assessed Some of the disperse reactive dyes dyed both components of polyester wool blends toapproximately the same depth union dyeing The dyeing obtained had satisfactory fastness properties andshowed fairly good dye fixation on the wool componenet of these blends The suitability of the dyes forprinting of nylon has been examined Maximum colour strength was achieved using neutral paste and alsousing saturated steam as fixation medium that followed by heating the prints for a short time After heatingat 180 C for a 1 minutes colour strength of dyes greatly improved It was found these conditions wereapparently necessary for dye diffusion into the fibre Keywords 1 Disperse dyes 2 Reactive disperse dyes 3 Synthesis 4 dyeing 5 Printing 6 Nylon 7 Polyester wool blend

عبدي صوفي، هنگامه

سنتز رنگ هاي ديسپرس راكتيو از رنگ هاي ديسپرس و كاربردشان روي نايلون و مخلوط هاي پلي استر/پشم

سنتز , رنگرزي , چاپ