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⵵/ȣ 2002 / ȣ: V.14,no.3,Jun
1() a-Bromoacrylamide ῡ Ű
2(Ÿ) Dyeing and Crosslinking of Chitosan Fibers with a-Bromoacrylamide Reactive Dy
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ʷ Dyeing properties and crosslinking effect of bifunctional reactive dyes on chitosan fiber were investigated to improve the stability of chitosan fiber against the mild acidic solution and the wet processing. Chitosan fibers were crosslinked with epichlorohydrin for comparing purpose, and dyed with C. I. Reactive Red 194, C. I. Reactive Blue 50, and the reactive dye having two -bromoacrylamide groups at various concentrations. The initial dyeing rates of reactive dyes are rapid and chitosan fibers absorb the relatively large amount of dyes. The chitosan fibers dyed with these dyes show the low degree of swelling and the low solubility in 1 % acetic acid solution and also represent the higher thermal stability The reactive dye with two -bromoacrylamide groups shows higher crosslinking effect than other dyes.
Ű Chitosan fiber; bromoacryamide; crosslinking; dyeing; swelling
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