Name: Ganesh
Message: I am curently pursuing a project on 'alkali substitute in reactive dyeing' as a student in UDCT. Recently I found an article in which cotton fabrics can be dyed with reactive dyes at neutral pH using polyacrylamide and epchlorohydrin treatment. Can you give me the literature for the mechanism for fixation.  

This is an interesting article, from the Journal for Asia on Textile & Apparel (ATA), "Salt- and alkali-free reactive dyeing on cotton," by M.Subramanian Senthil Kannan  & R.Nithyanandan.

I do not have any further information on the mechanism of how the polyacrylamide sticks to the cotton, nor of how the dye sticks to it. It looks more like a method of fabric painting or pigment dyeing, rather than true reactive dyeing, if the polyacrylamide is being used as a binder rather than to activate the cellulose as both soda ash and caustic soda do.

Polyacrylamide is the same gel material used in absorbent materials such as baby's diapers.


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