anonymous
  • anonymous
How do dyes attach to fibres? In particular how does an azo dye attach to cotton and wool and how does turmeric attach to cotton and wool.
Chemistry
  • Stacey Warren - Expert brainly.com
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katieb
  • katieb
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chmvijay
  • chmvijay
see wool or cotton contains the basic -NH2 groups and that of your dyes contains acidic groups like -COOH, -SO3H hence they form NH3+and COO- bond and get atracted etween themselves |dw:1371188797547:dw|
chmvijay
  • chmvijay
hydrogen bond may also present between them |dw:1371188896891:dw|
chmvijay
  • chmvijay
dyes which don't have the any functional groups Some dyes also goes in-between the fiber gaps and get adsorbed their by weak physical interaction.

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chmvijay
  • chmvijay
vat dyes are dyes which are insoluble in water they are dyed on cellulosic fibre (ie cotton) using a redox reaction :) some azo dyes also come in this section
chmvijay
  • chmvijay
methy orange is one example of azo dye |dw:1371189376449:dw|
anonymous
  • anonymous
Thank you :) That is really helpful!
chmvijay
  • chmvijay
you are welcome :)
anonymous
  • anonymous
What type of bond would this be?
chmvijay
  • chmvijay
may be somting like ionic, covalent and hydrogen bonding may be there :)
anonymous
  • anonymous
thank you. you have been extremely helpful

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