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RISS 인기검색어
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- 저자 : Neveen M. Hashem (검색결과 1 건)
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Mamdouh A. Sofan,Tarek Abou Elmaaty,Neveen M. Hashem,Laijiu Zheng 한국섬유공학회 2020 Fibers and polymers Vol.21 No.12
Azopyrazole disperse dyes 8-12 could be synthesized either by condensing ethyl 3-hydroxy-2-aryldiazenylbutenoates 3-7 with S-methyl hydrazine carbodithioate 1 or by coupling the parent pyrazole 2 with diazotized aniline, psubstitutedanilines and/or 4-aminoantipyrine. These dyes were applied to polyester fabrics using a high-temperature dyeingmethod at 120 °C and displayed yellow to orange hues. Raman spectra of the dyed samples undoubtedly excluded ringdyeing and were found to agree with the proposed structures. The synthesized disperse dyes were found to possess very gooddyeing properties, as indicated by color strength measurements, and all of them except dye 12 had a color strength (K/S) valueranging from 19-23. The dyed fabrics exhibited excellent fastness to washing and dry and wet rubbing as well as lightfastness, which varied from moderate to very good. The antimicrobial activities of the synthesized pyrazoles 2 and 8-12 aswell as the dyed fabric samples against Escherichia coli and Staphylococcus aureus were measured, and the results showedvery good activity.
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